DBQ/DVQ Series - power, Murata

DBQ/DVQ Series
www.murata-ps.com
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
Output (V)
O
Current (A)
Input (Vdc)
3.3
5
12
60
60
35
36-75
Typical units
FEATURES
PRODUCT O
OVERVIEW

Advanced Bus Converter industry standard
quarter-brick with digital PMBus interface
Murata Power Solutions is introducing the first in
a series of digitally controlled DC-DC converters
that are based on a 32-bit ARM processor. The DBQ
series provides a fully regulated, digitally controlled
DC output in a ¼-brick format that will support the
evolving Advanced Bus Converter (ABC) industry
standard footprint for isolated board mounted
power modules. The DBQ series supports advances
in power conversion technology including a digital
interface supporting the PMBus protocol for communications to power modules.
The DBQ series also incorporates a “droop” load
sharing option that allows connecting two or more

Optional standard five pin quarter-brick

High efficiency, 95.2% (typ)

Superior thermal performance

Fast dynamic response

± 2% Vout setting accuracy

2250Vdc input to output isolation voltage
(functional)

Optional baseplate (B option)

PMBus™ Revision 1.2 compliant
units together in parallel for demanding powerhungry applications or to provide redundancy in
high reliability applications. The converter also
offers high input to output isolation of 2250 VDC as
required for Power over Ethernet (PoE) applications.
The DBQ series is suitable for applications covering MicroTCA, servers and storage applications,
networking equipment, telecommunications equipment, Power over Ethernet (PoE), fan trays, wireless
networks, wireless pre-amplifiers, and industrial
and test equipment, along with other applications
requiring a regulated 12V.

Voltage droop load sharing for parallel operation

Certified to UL/EN/IEC 60950-1, CAN/CSA-C22.2
No. 60950-1, 2nd Edition, safety approvals and
EN55022/CISPR22 standards (pending)
Power Management (PMBus Options)
Applications

Configurable soft-start/stop

Distributed power architectures

Configurable output voltage (Vout) and voltage
margins (Margin low and Margin high)

Intermediate bus voltage applications

Configurable protection limits for OVP, input over
voltage, input under voltage, over current, on/off,
and temperature.

Network equipment

Servers and storage applications

Module Status monitor Vout, Iout, Vin, Temp,
Power good, and On/Off.

System status monitor (Vout, Iout, Vin and Temp
over time)
For full details go to
www.murata-ps.com/rohs
(pending)
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 1 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Output
Root Model
DBQ0360V2
VOUT
(V)
Input
Efficiency
Total Ripple & Noise Regulation (max.)
IIN, min. IIN, full
IOUT
VIN Nom. Range
(mVp-p)
Power
load
load
(A, max)
(V)
(V)
(W)
(mA)
(A)
Typ. Max. Line (mV) Load (mV)
3.3
60
198
DBQ0260V2
5
60
DBQ0135V2
12
35
DVQ0360V2 ➁
3.3
60
Min.
Typ.
Dimensions (open frame, max.)
(inches)
(mm)
40
150
20
15
48
36-75
50
4.43
92.0% 93.2% 2.3x1.45x0.48 max. 58.4x36.83x12.19
300
50
150
30
25
48
36-75
50
6.59
93.0% 94.8% 2.3x1.45x0.48 max. 58.4x36.83x12.19
420
100
150
75
45
48
36-75
75
9.19
94% 95.2% 2.3x1.45x0.48 max. 58.4x36.83x12.19
198
40
150
20
15
48
36-75
50
4.43
92.0% 93.2% 2.3x1.45x0.48 max. 58.4x36.83x12.19
DVQ0260V2 ➁
5
60
300
50
150
30
25
48
36-75
50
6.59
93.0% 94.8% 2.3x1.45x0.48 max. 58.4x36.83x12.19
DVQ0135V2 ➁
12
35
420
100
150
75
45
48
36-75
75
9.19
94% 95.2% 2.3x1.45x0.48 max. 58.4x36.83x12.19
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with external 1μF and 10μF capacitors in parallel across their output pins.
➁ DVQ models do not have the PMBus feature.
DIGITAL CONTROL BRICK PART NUMBER FORMAT
Description
Part Number Structure
Product Family
D
Form Factor
Definition and Options
X
DB = Full Featured Digital Bus converter, DV = NO PMBus, NO Sense & Trim Pins
Q
Vout ➀
Q = Quarter Brick
0
Output Current
1
01 = 12Vout, 02 = 5Vout, 03 = 3.3Vout (Without PMBus Vout cannot be changed)
3
5
Vin Range
Max Iout in Amps
V
Logic ➀
2
V2 = 36-75V
N
Pin Length ➁
N = Negative, P = Positive
X
Mechanical Configuration
1 = 0.110" (cut), 2 = 0.145"(cut), Omit for standard shown in the mechanical drawings
B
Load Sharing
B = Baseplate, Omit for Open Frame (Standard Configuration)
S
Specific Customer Configuration
S = Load Sharing, Omit for Standard (Standard Configuration)
X
RoHS
X
Customer Code, Omit for Standard
C RoHS 6/6 Compliant
➀ PMBus Configurable
➁ Minimum order quantity is required. Samples available with standard pin length only.
Note: Some model number combinations may not be available. See website or contact your local Murata sales representative.
Part Number Example
DBQ0135V2NBSC = Full Featured Digital 1/4 Brick, 12Vout, 35A, 36-75Vin, Negative logic, Baseplate, Load Sharing, RoHS 6/6 compliant
EVALUATION BOARD AVAILABLE FROM MURATA POWER SOLUTIONS
Part Number
Application Note
USB Adaptor Part Number
GUI Software Application Note
MPS-TD001
www.murata-ps.com/data/apnotes/dcan-63.pdf
MPS-AD001
www.murata-ps.com/data/apnotes/dcan-63.pdf
Contact your local Murata sales representative for ordering details.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 2 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0360V2: 3.3V/60A FUNCTIONAL SPECIFICATIONS (VOLTAGE APPLIED TO SCL SDA SMBALERT AND ON/OFF 2, MIN: -0.3V MAX: 3.6V)
Conditions ➀
Minimum
Typical/Nominal
Maximum
Units
100 mS max. duration
Input to output
Power on, referred to -Vin
Current-limited, no damage, short-circuit protected
Vin = Zero (no power)
0
0
0
0
-55
80
100
2250
13.5
200
60
125
Vdc
Vdc
Vdc
Vdc
W
A
°C
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
On/Off Remote Control
Output Power
Output Current
Storage Temperature Range
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied nor recommended.
INPUT
Operating voltage range (V2)
Start-up threshold
Undervoltage shutdown
Overvoltage shutdown
Overvoltage Recover
Internal Filter Type
External Input fuse
Input current
Full Load Conditions
Low Line input current
Inrush Transient
Short Circuit input current
No Load input current
Shut-Down input currrent(Off, UV, OT)
Back Ripple Current
48
34
32
NA
NA
Pi
20
75
35
34
NA
NA
Vdc
Vdc
Vdc
Vdc
Vdc
A
4.43
5.79
TBD
0.05
50
TBD
TBD
4.48
5.97
TBD
0.1
100
TBD
TBD
A
A
A2-Sec.
A
mA
mA
mAp-p
92
93.2
functional
10
1000
2250
1500
1500
%
Vdc
Vdc
Vdc
MΩ
pF
Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/
EN60950-1, 2nd edition (pending)
Yes
Per Telcordia SR-332, Issue 2, Method 1, Class 1, Ground Fixed,
Tcase=+25°C
1800
Hours x 103
Efficiency
Isolation Voltage
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
R
P
Calculated MTBF
36
33
31
NA
NA
Vin = nominal
Vin = minimum
Vin = 48V.
Iout = minimum, unit=ON
Vin=48V, full load (V2)
Input to output
Input to Baseplate
Output to Baseplate
Y
R
A
N
I
M
I
L
E
GENERAL and SAFETY
Safety
(Default, configurable via PMBus)
(Default, configurable via PMBus)
(Default, configurable via PMBus)
(Default, configurable via PMBus)
DYNAMIC CHARACTERISTICS
Switching Frequency (Configurable via PMBus)
Fixed Frequency Control
Variable Frequency Control (Default)
150
NA
KHz
KHz
Turn On Time (Default, Configurable via PMBus)
Vin On to Vout Regulated
Remote On to Vout Regulated
45
mS
25
mS
Vout Rise Time (Default, Configurable via PMBus)
From 0%~100%
20
13
TBD
TBD
μSec
TBD
TBD
mV
mS
Vout Fall Time of Regulated Off (Default, Configurable via PMBus)
From 100%~0%
Dynamic Load Response
Dynamic Load Peak Deviation
50-75-50%, 1A/us,within 1% of Vout
same as above
mS
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MDC_DBQ Series.B02Δ Page 3 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0360V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
FEATURES and OPTIONS
Minimum
Typical/Nominal
Maximum
Units
13.5
V
Remote On/Off Control
Primary On/Off control (designed to be driving with an open collector logic, Voltages referenced to -Vin)
“P” suffix:
Positive Logic, ON state
ON = pin open or external voltage
3.5
Positive Logic, OFF state
OFF = ground pin or external voltage
0
Control Current
open collector/drain
0.1
0.8
V
0.2
mA
0.8
V
“N” suffix:
Negative Logic, ON state
ON = ground pin or external voltage
-0.1
Negative Logic, OFF state
OFF = pin open or external voltage
3.5
Control Current
open collector/drain
0.1
OUTPUT
Total Output Power
Output Adjust Range
Overvoltage Protection
At 100% load, no trim, all conditions
3.27
Configurable via PMBus
2.2
Configurable via PMBus
Voltage Droop
Default, configurable via PMBus
Current
Output Current Range
Minimum Load
Current Limit Inception ➁
Line Regulation (V2)
Load Regulation (V2)
R
P
Ripple and Noise
Temperature Coefficient
Maximum Output Capacitance
W
3.3
3.33
Vdc
3.6
Vdc
4
0
60
Vdc
mΩ
60
A
0.4
1
A
Output shorted to ground, no damage
Hiccup current limiting
Vin = 36-75, Vout = nom., full load
Iout = min. to max., Vin = nom.
5 Hz- 20 MHz BW, Cout = 1μF
paralleled with 10μF
At all outputs
Low ESR
A
70
I
L
E
Regulation ➂
200
Hiccup technique, autorecovery within 1% of Vout
Short circuit protection method, default
response, configurable via PMBus
198
No minimum load
98% of Vnom., after warmup, Configurable via PMBus
Short Circuit Current
0
mA
Short Circuit
Short Circuit Duration
(remove short for recovery)
N
I
M
V
0.2
Y
R
A
0
Voltage
Setting Accuracy
13.5
Continuous
Non-latching
20
mV
15
mV
40
150
mV pk-pk
0.01
0.02
% of Vnom./°C
10,000
μF
3.6
Vdc
0.4
Vdc
2.5
3
Vdc
Vdc
Power Good—Negative logic (Configurable via PMBus)
Power good high stage voltage
Power good low stage voltage
Out voltage for power good off triggering
Out Voltage for power good on triggering
2.4
0
Configurable via PMBus
Configurable via PMBus
2
2.6
2.3
2.8
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MDC_DBQ Series.B02Δ Page 4 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0360V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
PMBus
Minimum
Typical/Nominal
Maximum
Units
400
kHz
3.3
Vdc
PMBus GENERAL
PMBus REV. 1.2. SMBALERT# is supported. PEC is supported. Linear data format used.
Bus speed
Logic high input
Logic low input
Logic high output
Logic low output
2
0
2.4
0.8
Vdc
Vdc
0.4
Vdc
PMBus ADDRESSING
If the calculated PMBus address is 0d, 11d or 12d, SA0 or SA1 lefts open, default PMBus address 119d is assigned instead. PMBus address = 8x(SA0 value) + (SA1 value). SA0, SA1 value VS
resistor connected to GND.
0
1
2
3
4
5
6
7
VIN_READ
IOUT_READ (> = 10A)
IOUT_READ (<10A)
TEMP_READ
33
47
68
100
150
-2
-1
-5
I
L
E
-1
5
kΩ
Y
R
A
22
N
I
M
PMBus MONITORING ACCURACY
VOUT_READ
10
220
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
2
%
1
%
5
%
1
A
5
°C
DIGITAL INTERFACE SPECIFICATIONS (PMBUS MONITORING & FUNCTIONAL DESCRIPTION)
Fault Protection Specifications
Output Voltage, Over Voltage protection, OVP
VOUT_OV_FAULT_LIMIT, Configurable via
PMBus
R
P
Input Voltage, Input Over Voltage Protection
VIN_OV_FAULT_LIMIT (Configurable via
PMBus) ➃
Input Voltage, Input Under Voltage Protection,
UVLO
Factory default
>VOUT_OV_WARM_LIMIT
Restart delay (default, Configurable via PMBus)
Factory default
>VIN_OV_WARM_LIMIT
Restart delay (default, Configurable via PMBus)
Factory default
Restart delay (default, Configurable via PMBus)
(factory default)
IOUT_OC_FAULT_LIMIT (Configurable via
PMBus) ➃
Restart delay (default, Configurable via PMBus)
Over Temperature Protection, OTP
OT_FAULT_LIMIT (Configurable via PMBus) ➃
OT_FAULT_LIMIT (factory default)
NA
NA
32
-2
32
100
-2.5
120
0
OTP accuracy (factory default)
5
Restart delay (default, Configurable via PMBus)
V
ms
V
2
%
75
V
ms
30
°C
5
500
A
ms
150
%
A
75
100
>OT_WARM_LIMIT
%
2.5
70
0
V
V
ms
V
>IOUT_OC_WARN_LIMT
4
500
Setpoint accuracy (Io)
4
Setpoint accuracy
<VIN_UV_WARM_LIMIT <VIN_OV_FAULT_LIMIT
3
Setpoint accuracy
VIN_UV_FAULT_LIMIT (Configurable via
PMBus) ➃
Over Current Protection, OCP
°C
°C
ms
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 5 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0360V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
MECHANICAL
Outline Dimensions (open frame)
(Please refer to outline drawing)
Outline Dimensions (with baseplate)
Weight (open frame)
Weight (with baseplate)
Through Hole Pin Diameter
Digital Interface Pin Diameter
Through Hole Pin Material
LxWxH
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
Minimum
Typical/Nominal
2.3 x 1.45 x 0.48
58.4 x 36.83 x 12.19
2.3 x 1.45 x 0.50
58.4 x 36.80 x 12.7
TBD
TBD
0.04 & 0.062
1.016 & 1.575
Operating Baseplate Temperature
with derating
0.5
Copper alloy
98.4-299
4.7-19.6
Configurable Via PMBus
Electromagnetic Interference
Conducted, EN55022/CISPR22
External filter required; see
emissions performance test.
I
L
E
RoHS rating
-40
Vin = Zero (no power)
Thermal Protection/Shutdown (with “B” Suffix,
default value, Configurable via PMBUS)
Notes
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with external 1μF and 10μF capacitors in parallel across their output pins. All values are
default, unless otherwise noted.
➁ Over-current protection is non-latching with auto recovery (hiccup).
R
P
N
I
M
Storage Temperature
-40
-55
Units
Inches
mm
Inches
mm
Ounces
Grams
Ounces
Grams
Inches
mm
Y
R
A
0.02
ENVIRONMENTAL
Operating Ambient Temperature Range
Maximum
μ-inches
μ-inches
85
°C
110
°C
125
°C
120
°C
B
Class
RoHS-6
➂ Regulation specifications describe the output voltage changes as the line voltage or load current
is varied from its nominal or midpoint value to either extreme.
➃ See Operating information section.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 6 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PERFORMANCE DATA
Efficiency vs. Line Voltage and Load Current @ +25°C
100
Efficiency (%)
95
90
VIN = 36V
VIN = 48V
VIN = 75V
85
80
75
70
5
10
15
20
25
30
35
40
45
50
55
Y
R
A
60
Load Current (A)
Maximum Current Temperature Derating with baseplate
(Vin = 48V, airflow from Vin to Vout)
Maximum Current Temperature Derating with baseplate
(Vin = 48V, airflow from Vin- to Vin+)
N
I
M
70
70
60
60
50
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
40
30
I
L
E
20
10
0
30
R
P
40
50
60
70
Ambient Temperature (°C)
80
85
Output Current (Amps)
Output Current (Amps)
50
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
2.5 m/s (500 LFM)
3.0 m/s (600 LFM)
40
30
20
10
0
30
40
50
60
70
80
85
Ambient Temperature (°C)
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MDC_DBQ Series.B02Δ Page 7 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0260V2: 5V/60A FUNCTIONAL SPECIFICATIONS (VOLTAGE APPLIED TO SCL SDA SMBALERT AND ON/OFF 2, MIN: -0.3V MAX: 3.6V)
Conditions ➀
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Minimum
0
Input Voltage, Transient
100 mS max. duration
Isolation Voltage
Input to output
On/Off Remote Control
Power on, referred to -Vin
0
Output Power
0
Output Current
Current-limited, no damage, short-circuit protected
0
Vin = Zero (no power)
-55
Storage Temperature Range
Typical/Nominal
Maximum
Units
80
Vdc
100
Vdc
2250
Vdc
13.5
Vdc
303
W
60
A
125
°C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied nor recommended.
INPUT
Operating voltage range (V2)
36
Start-up threshold
Undervoltage shutdown
Overvoltage shutdown
Overvoltage Recover
Internal Filter Type
External Input fuse
(Default, configurable via PMBus)
(Default, configurable via PMBus)
(Default, configurable via PMBus)
(Default, configurable via PMBus)
Input current
Vin = nominal
Vin = minimum
Inrush Transient
Short Circuit input current
Vin = 48V.
No Load input current
Shut-Down input currrent(Off, UV, OT)
Back Ripple Current
Iout = minimum, unit=ON
I
L
E
GENERAL and SAFETY
Efficiency
Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/
EN60950-1, 2nd edition (pending)
Per Telcordia SR-332, Issue 2, Method 1, Class 1, Ground Fixed,
Tcase=+25°C
R
P
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
93
Input to output
Isolation Voltage
Input to Baseplate
Output to Baseplate
Vdc
35
34
NA
NA
Vdc
Vdc
Vdc
Vdc
Pi
Vin=48V, full load (V2)
75
34
32
NA
NA
20
N
I
M
Full Load Conditions
Low Line input current
48
Y
R
A
33
31
NA
NA
A
6.59
6.72
8.77
8.86
A
A
TBD
TBD
A2-Sec.
0.05
0.1
A
50
100
mA
TBD
TBD
mA
TBD
TBD
mAp-p
94.8
%
2250
Vdc
1500
Vdc
1500
Vdc
Yes
1800
Hours x 103
150
KHz
functional
10
1000
MΩ
pF
DYNAMIC CHARACTERISTICS
Switching Frequency (Configurable via PMBus)
Fixed Frequency Control
Variable Frequency Control (Default)
NA
KHz
Turn On Time (Default, Configurable via PMBus)
Vin On to Vout Regulated
Remote On to Vout Regulated
45
mS
25
mS
Vout Rise Time (Default, Configurable via PMBus)
From 0%~100%
20
mS
13
mS
Vout Fall Time of Regulated Off (Default, Configurable via PMBus)
From 100%~0%
Dynamic Load Response
Dynamic Load Peak Deviation
50-75-50%, 1A/us,within 1% of Vout
same as above
TBD
TBD
μSec
TBD
TBD
mV
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 8 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0260V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
FEATURES and OPTIONS
Minimum
Typical/Nominal
Maximum
Units
13.5
V
Remote On/Off Control
Primary On/Off control (designed to be driving with an open collector logic, Voltages referenced to -Vin)
“P” suffix:
Positive Logic, ON state
ON = pin open or external voltage
3.5
Positive Logic, OFF state
OFF = ground pin or external voltage
0
Control Current
open collector/drain
0.1
0.8
V
0.2
mA
0.8
V
“N” suffix:
Negative Logic, ON state
ON = ground pin or external voltage
-0.1
Negative Logic, OFF state
OFF = pin open or external voltage
3.5
Control Current
open collector/drain
0.1
OUTPUT
Total Output Power
Output Adjust Range
Overvoltage Protection
At 100% load, no trim, all conditions
4.95
Configurable via PMBus
3
Configurable via PMBus
Voltage Droop
Default, configurable via PMBus
Current
Output Current Range
Minimum Load
Current Limit Inception ➁
Short Circuit Current
R
P
Temperature Coefficient
Maximum Output Capacitance
W
5
5.05
Vdc
5.5
Vdc
6
0
60
Vdc
mΩ
60
A
0.4
1
A
Output shorted to ground, no damage
Hiccup current limiting
Vin = 36-75, Vout = nom., full load
Iout = min. to max., Vin = nom.
5 Hz- 20 MHz BW, Cout = 1μF
paralleled with 10μF
At all outputs
Low ESR
A
70
I
L
E
Line Regulation (V2)
303
Hiccup technique, autorecovery within 1% of Vout
Short Circuit Duration
(remove short for recovery)
Short circuit protection method, default
response, configurable via PMBus
Regulation ➂
300
No minimum load
98% of Vnom., after warmup, Configurable via PMBus
Ripple and Noise
0
mA
Short Circuit
Load Regulation (V2)
N
I
M
V
0.2
Y
R
A
0
Voltage
Setting Accuracy
13.5
Continuous
Non-latching
50
0.01
30
mV
25
mV
150
mV pk-pk
0.02
% of Vnom./°C
10,000
μF
3.6
Vdc
0.4
Vdc
4
4.75
Vdc
Vdc
Power Good—Negative logic (Configurable via PMBus)
Power good high stage voltage
Power good low stage voltage
Out voltage for power good off triggering
Out Voltage for power good on triggering
2.4
0
Configurable via PMBus
Configurable via PMBus
3
3.75
3.5
4.25
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MDC_DBQ Series.B02Δ Page 9 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0260V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
PMBus
PMBus GENERAL
PMBus REV. 1.2. SMBALERT# is supported. PEC is supported. Linear data format used.
Bus speed
Logic high input
Logic low input
Logic high output
Logic low output
PMBus ADDRESSING
Minimum
Typical/Nominal
Maximum
Units
2
0
2.4
400
3.3
0.8
0.4
kHz
Vdc
Vdc
Vdc
Vdc
If the calculated PMBus address is 0d, 11d or 12d, SA0 or SA1 lefts open, default PMBus address 119d is assigned instead. PMBus address = 8x(SA0 value) + (SA1 value). SA0, SA1 value VS
resistor connected to GND.
0
1
2
3
4
5
6
7
PMBus MONITORING ACCURACY
VIN_READ
VOUT_READ
IOUT_READ (> = 10A)
IOUT_READ (<10A)
TEMP_READ
-2
-1
-5
-1
5
DIGITAL INTERFACE SPECIFICATIONS (PMBUS MONITORING & FUNCTIONAL DESCRIPTION)
I
L
E
Fault Protection Specifications
Output Voltage, Over Voltage protection, OVP
VOUT_OV_FAULT_LIMIT, Configurable via
PMBus
Input Voltage, Input Over Voltage Protection
R
P
VIN_OV_FAULT_LIMIT (Configurable via
PMBus) ➃
Input Voltage, Input Under Voltage Protection,
UVLO
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
2
1
5
1
5
%
%
%
A
°C
Y
R
A
N
I
M
10
22
33
47
68
100
150
220
Factory default
6
V
>VOUT_OV_WARM_LIMIT
3
6
V
Restart delay (default, Configurable via PMBus)
500
μS
Factory default
NA
V
Setpoint accuracy
%
>VIN_OV_WARM_LIMIT
NA
V
Restart delay (default, Configurable via PMBus)
μS
Factory default
32
V
2
%
Setpoint accuracy
-2
VIN_UV_FAULT_LIMIT (Configurable via
PMBus) ➃
<VIN_UV_WARM_LIMIT <VIN_OV_FAULT_LIMIT
32
75
V
Restart delay (default, Configurable via PMBus)
100
μS
Setpoint accuracy (Io)
-2.5
2.5
%
(factory default)
70
A
>IOUT_OC_WARN_LIMT
0
75
A
Over Current Protection, OCP
IOUT_OC_FAULT_LIMIT (Configurable via
PMBus) ➃
Over Temperature Protection, OTP
OT_FAULT_LIMIT (Configurable via PMBus) ➃
Restart delay (default, Configurable via PMBus)
100
μS
OT_FAULT_LIMIT (factory default)
>OT_WARM_LIMIT
0
120
30
150
°C
°C
OTP accuracy (factory default)
5
5
°C
Restart delay (default, Configurable via PMBus)
500
μS
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MDC_DBQ Series.B02Δ Page 10 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0260V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
MECHANICAL
Outline Dimensions (open frame)
(Please refer to outline drawing)
Outline Dimensions (with baseplate)
Weight (open frame)
Weight (with baseplate)
Through Hole Pin Diameter
Digital Interface Pin Diameter
Through Hole Pin Material
LxWxH
Minimum
Typical/Nominal
Maximum
Units
2.3 x 1.45 x 0.48
Inches
58.4 x 36.83 x 12.19
mm
2.3 x 1.45 x 0.50
Inches
58.4 x 36.80 x 12.7
mm
TBD
Ounces
Grams
TBD
Ounces
Grams
0.04 & 0.062
Inches
1.016 & 1.575
mm
Y
R
A
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
with derating
-40
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Baseplate Temperature
Thermal Protection/Shutdown (with “B” Suffix,
default value, Configurable via PMBUS)
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
N
I
M
Storage Temperature
-40
Vin = Zero (no power)
-55
Configurable Via PMBus
External filter required; see
emissions performance test.
I
L
E
Notes
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with external 1μF and 10μF capacitors in parallel across their output pins. All values are
default, unless otherwise noted.
➁ Over-current protection is non-latching with auto recovery (hiccup).
R
P
0.02
0.5
Copper alloy
98.4-299
μ-inches
4.7-19.6
μ-inches
85
°C
110
°C
125
°C
120
°C
B
Class
RoHS-6
➂ Regulation specifications describe the output voltage changes as the line voltage or load current
is varied from its nominal or midpoint value to either extreme.
➃ See Operating information section.
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MDC_DBQ Series.B02Δ Page 11 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0135V2: 12V/35A FUNCTIONAL SPECIFICATIONS (VOLTAGE APPLIED TO SCL SDA SMBALERT AND ON/OFF 2, MIN: -0.3V MAX: 3.6V)
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Minimum
Typical/Nominal
Maximum
Units
Input Voltage, Continuous
0
80
Vdc
Input Voltage, Transient
100 mS max. duration
100
Vdc
Isolation Voltage
Input to output
2250
Vdc
On/Off Remote Control
Power on, referred to -Vin
0
13.5
Vdc
Output Power
0
428.4
W
Output Current
Current-limited, no damage, short-circuit protected
0
35
A
SCL / SDA / SMBALERT / ON/OFF 2
-0.3
3.6
Vdc
Storage Temperature Range
Vin = Zero (no power)
-55
125
°C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied or recommended.
INPUT
Operating voltage range (V2)
Start-up threshold
Undervoltage shutdown
Internal Filter Type
External Input fuse
Input current
Full Load Conditions
Low Line input current
Inrush Transient
Short Circuit input current
No Load input current
Shut-Down input currrent(Off, UV, OT)
Back Ripple Current
(Default, configurable via PMBus)
(Default, configurable via PMBus)
Vin = nominal
Vin = minimum
Vin = 48V.
Iout = minimum, unit=ON
36
33
31
48
34
32
Pi
20
75
35
34
Vdc
Vdc
Vdc
9.19
12.25
1.3
0.05
75
20
20
9.44
12.59
2.6
0.1
112
30
40
A
A
A2-Sec.
A
mA
mA
mAp-p
2250
1500
1500
Vdc
Vdc
Vdc
A
GENERAL and SAFETY
Isolation Voltage
Input to output
Input to Baseplate
Output to Baseplate
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
Calculated MTBF
functional
10
1500
Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/
EN60950-1, 2nd edition (pending)
Per Telcordia SR-332, Issue 2, Method 1, Class 1, Ground Fixed,
Tcase=+25°C
MΩ
pF
Yes
1800
Hours x 103
175
KHz
DYNAMIC CHARACTERISTICS
Switching Frequency (Configurable via PMBus)
Fixed Frequency Control
Turn On Time (Default, Configurable via PMBus)
Vin On to Vout Regulated
Remote On to Vout Regulated
Vout Rise Time (Default, Configurable via PMBus)
From 0%~100%
Vout Fall Time of Regulated Off (Default, Configurable via PMBus)
From 100%~0%
Dynamic Load Response
50-75-50%, 0.1A/us,within 1% of Vout
Dynamic Load Peak Deviation
same as above
60
25
20
20
200
±300
mS
mS
mS
300
±500
mS
μSec
mV
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MDC_DBQ Series.B02Δ Page 12 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0135V2 FUNCTIONAL SPECIFICATIONS (CONT.)
Conditions ➀
FEATURES and OPTIONS
Minimum
Typical/Nominal
Remote On/Off Control
Primary On/Off control (designed to be driving with an open collector logic, Voltages referenced to -Vin)
“P” suffix:
Positive Logic, ON state
ON = pin open or external voltage
3.5
Positive Logic, OFF state
OFF = ground pin or external voltage
0
Control Current
open collector/drain
0.1
“N” suffix:
Negative Logic, ON state
ON = ground pin or external voltage
-0.1
Negative Logic, OFF state
OFF = pin open or external voltage
3.5
Control Current
open collector/drain
0.1
Secondary On/Off control (Pull up to 3.3V internally; ignored by default configuration; see technical notes section) Voltages referenced to -Vout)
“P” suffix:
Positive Logic, ON state
ON = pin open or external voltage
1.5
Positive Logic, OFF state
OFF = ground pin or external voltage
0
Control Current
open collector/drain
0.03
“N” suffix:
Negative Logic, ON state
ON = ground pin or external voltage
0
Negative Logic, OFF state
OFF = pin open or external voltage
1.5
Control Current
open collector/drain
0.03
Remote Sense Compliance
Sense pins connected externally to respective Vout pins
Maximum
Units
13.5
0.8
0.2
V
V
mA
0.8
13.5
0.2
V
V
mA
3.3
0.8
0.06
V
V
mA
0.8
3.3
0.06
V
V
mA
428.4
W
12.030
Vdc
OUTPUT
Total Output Power
Voltage
Initial Output Voltage
(Default, Configurable via PMBus)
Output Voltage
(Default, Configurable via PMBus)
Output Voltage
(Default, Configurable via PMBus)
Over-Voltage Protection
(Default, Configurable via PMBus)
Voltage Droop
Without "S" suffix
With "S" suffix
Current
Output Current Range
Minimum Load
0
@VIN = 48V Iout = 0A temp = 25C, both with/without "S" suffix
Current Limit Inception ➁
Short Circuit
Short Circuit Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method, default
response, configurable via PMBus
Regulation ➂
Line Regulation (V2)
420
11.990
@All condtions, without "S" suffix, VOUT_DROOP = 0Ω
11.760
12.000
12.240
Vdc
@All condtions , with"S" suffix, VOUT_DROOP = 10mΩ
(12.000Iout*0.01)*0.98
12.000-Iout*0.01
(12.000Iout*0.01)*1.02
Vdc
13.80
14.40
15.60
Vdc
Direct feedback
Fault response is configurable via PMBus
Default, Configurable via PMBus
0
10
mΩ
mΩ
0
35
90% of Vnom., after warmup, Configurable via PMBus
No minimum load
42
Hiccup technique, autorecovery within 1% of Vout
0.4
Output shorted to ground, no damage
Continuous
Hiccup current limiting
Non-latching
Vin = 36-75, Vout = nom., full load
Vin=nom.
Load Regulation (V2)
Without S suffix: Vout@min_load-Vout@max_load
With S suffix: Vout@min_load-Vout@max_load-Iout*VOUT_DROOP
5 Hz- 20 MHz BW, Cout = 1μF
Ripple and Noise
paralleled with 10μF
Temperature Coefficient
At all outputs
Maximum Output Capacitance
Low ESR
Power Good—Negative logic (Configurable via PMBus)
Power good high stage voltage
Power good low stage voltage
Out voltage for power good off triggering
Configurable via PMBus
Out Voltage for power good on triggering
Configurable via PMBus
2.4
0
8.64
9.72
A
A
1
A
75
mV
45
mV
100
150
mV pk-pk
0.01
0.02
10,000
% of Vnom./°C
μF
3.6
0.4
10.56
11.88
Vdc
Vdc
Vdc
Vdc
9.6
10.8
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MDC_DBQ Series.B02Δ Page 13 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0135V2 FUNCTIONAL SPECIFICATIONS (CONT.)
PMBus
Conditions ➀
Minimum
Typical/Nominal
Maximum
Units
PMBus GENERAL
PMBus REV. 1.2. SMBALERT# is supported. PEC is supported. Linear data format used.
Bus speed
400
kHz
Logic high input
2
3.3
Vdc
Logic low input
0
0.8
Vdc
Logic high output
2.4
3.6
Vdc
Logic low output
-0.1
0.4
Vdc
PMBus ADDRESSING
If the calculated PMBus address is 0d, 11d or 12d, SA0 or SA1 lefts open, default PMBus address 119d is assigned instead. PMBus address = 8x(SA0 value) + (SA1 value). SA0,
SA1 value VS resistor connected to GND.
0
10
kΩ
1
22
kΩ
2
33
kΩ
3
47
kΩ
4
68
kΩ
5
100
kΩ
6
150
kΩ
7
220
kΩ
PMBus MONITORING ACCURACY
VIN_READ
-2.5
2.5
%
VOUT_READ
-1
1
%
IOUT_READ
-1
1
A
TEMP_READ
-5
5
°C
DIGITAL INTERFACE SPECIFICATIONS (PMBUS MONITORING & FUNCTIONAL DESCRIPTION)
Fault Protection Specifications
Output Voltage, Over Voltage protection, OVP
VOUT_OV_FAULT_LIMIT, Configurable via PMBus
VIN_OV_FAULT_LIMIT (Configurable via
PMBus) ➃
Input Voltage, Input Under Voltage Protection, UVLO
Factory default
>VOUT_OV_WARM_LIMIT
Restart delay (default, Configurable via PMBus)
14.4
8.1
500
>VIN_OV_WARM_LIMIT
34
200
mS
Factory default
32
V
Setpoint accuracy
-2
<VIN_UV_WARM_LIMIT <VIN_OV_FAULT_LIMIT
Over Current Protection, OCP
Restart delay (default, Configurable via PMBus)
Setpoint accuracy (Io)
(factory default)
-3
>IOUT_OC_WARN_LIMT
0
Over Temperature Protection, OTP
OT_FAULT_LIMIT (Configurable via PMBus) ➃
Restart delay (default, Configurable via PMBus)
OT_FAULT_LIMIT (factory default)
>OT_WARM_LIMIT
OTP accuracy (factory default)
Restart delay (default, Configurable via PMBus)
32
110
V
V
mS
Restart delay (default, Configurable via PMBus)
VIN_UV_FAULT_LIMIT (Configurable via
PMBus) ➃
IOUT_OC_FAULT_LIMIT (Configurable via
PMBus) ➃
15.6
2
%
75
V
3
mS
%
A
50
A
200
42
0
5
500
120
30
500
V
150
5
mS
°C
°C
°C
mS
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MDC_DBQ Series.B02Δ Page 14 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
DBQ0135V2 FUNCTIONAL SPECIFICATIONS (CONT.)
MECHANICAL
Outline Dimensions (open frame)
(Please refer to outline drawing)
Outline Dimensions (with baseplate)
Conditions ➀
Minimum
Maximum
2.3 x 1.45 x 0.48
58.4 x 36.83 x 12.19
2.3 x 1.45 x 0.52
58.4 x 36.80 x 13.21
1.85
52.5
2.35
66.8
0.04 & 0.062
1.016 & 1.575
0.020
0.5
Copper alloy
98.4-299
4.7-19.6
LxWxH
Weight (open frame)
Weight (with baseplate)
Through Hole Pin Diameter
Digital Interface Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Typical/Nominal
Nickel subplate
Gold overplate
Units
Inches
mm
Inches
mm
Ounces
Grams
Ounces
Grams
Inches
mm
μ-inches
μ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Baseplate Temperature
Storage Temperature
Thermal Protection/Shutdown (with "B" Suffix,
default value, Configurable via PMBus)
Electromagnetic Interference
Conducted, EN55022/CISPR22
RoHS rating
Notes
with derating
Vin = Zero (no power)
-40
-40
-55
85
110
125
°C
°C
°C
Configurable Via PMBus
125
°C
External filter required; see
emissions performance test.
B
Class
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with external 1μF and 10μF capacitors in parallel across their output pins. All values are
default, unless otherwise noted.
➁ Over-current protection is non-latching with auto recovery (hiccup).
RoHS-6
➂ Regulation specifications describe the output voltage changes as the line voltage or load current
is varied from its nominal or midpoint value to either extreme.
➃ See Operating information section.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 15 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PERFORMANCE DATA
Efficiency vs. Line Voltage and Load Current @ +25°C
100
Efficiency (%)
95
VIN = 36V
VIN = 48V
VIN = 75V
90
85
80
75
70
0
100
200
300
400
Power Out (Watts)
Thermal image at 35A current with 48V input voltage, 30°C ambient temperature, and 100LFM air flow. Identifiable and recommended maximum value to be verified in application.
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MDC_DBQ Series.B02Δ Page 16 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PERFORMANCE DATA: TEMPERATURE DERATING
Open Frame
With Baseplate
Maximum Current Temperature Derating at sea level
(Vin = 36V, airflow from Vin to Vout)
Maximum Current Temperature Derating at sea level
(Vin = 36V, airflow from Vin to Vout)
33
39
30
36
33
27
30
27
Output Current (Amps)
Output Current (Amps)
24
21
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
18
15
12
9
24
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
21
18
15
12
9
6
6
3
3
0
30
35
40
45
50
55
60
65
70
75
80
0
30
85
35
40
45
50
55
60
65
70
75
80
85
80
85
80
85
Ambient Temperature (°C)
Ambient Temperature (°C)
Maximum Current Temperature Derating at sea level
(Vin = 48V, airflow from Vin to Vout)
Maximum Current Temperature Derating at sea level
(Vin = 48V, airflow from Vin to Vout)
33
39
30
36
33
27
30
27
Output Current (Amps)
Output Current (Amps)
24
21
18
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
15
12
9
24
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
21
18
15
12
9
6
6
3
3
0
30
35
40
45
50
55
60
65
70
75
80
0
30
85
35
40
45
Ambient Temperature (°C)
50
55
60
65
70
75
Ambient Temperature (°C)
Maximum Current Temperature Derating at sea level
(Vin = 75V, airflow from Vin to Vout)
Maximum Current Temperature Derating at sea level
(Vin = 75V, airflow from Vin to Vout)
33
39
30
36
33
27
30
27
Output Current (Amps)
Output Current (Amps)
24
21
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
18
15
12
9
24
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
1.5 m/s (300 LFM)
2.0 m/s (400 LFM)
21
18
15
12
9
6
6
3
3
0
30
35
40
45
50
55
60
65
Ambient Temperature (°C)
70
75
80
85
0
30
35
40
45
50
55
60
65
70
75
Ambient Temperature (°C)
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MDC_DBQ Series.B02Δ Page 17 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PERFORMANCE DATA
Enable Startup Delay (Vin = 48V, Iout = 35A, Cout = 1000uF, Ta = +25°C)
Ch2 = Vout Ch4 = Enable
Startup Delay (Vin = 48V, Iout = 35A, Cout = 1000uF, Ta = +25°C)
Ch1 = Vin, Ch2 = Vout
Stepload Transient Response (Vin = 48V, Iout = 50-75-50% of Iout, Cload = 1uF || 10uF,
slew rate: 0.1A/us, Ta = +25°C)
Output Ripple & Noise (Vin = 48V, Iout = 0A, Cout = 1uF || 10uF, Ta = +25°C)
Output Ripple & Noise (Vin = 48V, Iout = 35A, Cout = 1uF || 10uF, Ta = +25°C)
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MDC_DBQ Series.B02Δ Page 18 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
2
4
5
2.30 (58.4)
OPEN FRAME
M3 THREAD TYP 4PL
0.220
1.860 (47.24)
WITH BASEPLATE OPTION
SEE NOTE 6
PINS 1,2,4:
Î0.040±0.0015(1.016±0.038)
Shoulder: Î0.076±0.005(1.93±0.13)
PINS 5,16:
Î0.062±0.0015(1.575±0.038)
Shoulder: Î0.098±0.005(2.49±0.13)
0.52 Max
14 15
12 13
10 11
8 9
6 7
2.30 (58.4)
1.45 (36.83)
1.030 (26.16)
16
1
0.48 Max
1.45 (36.83)
0.210
MECHANICAL SPECIFICATIONS
0.010 minimum clearance
between standoffs and
highest component
0.600 (15.24)
0.079
0.315
0.600
(15.24)
2.000 (50.8)
PIN SIDE VIEW
PINS 1,2,4,:
Î0.040±0.0015(1.016±0.038)
Shoulder: Î0.076±0.005(1.93±0.13)
PINS 5,16:
Î0.062±0.0015(1.575±0.038)
Shoulder: Î0.098±0.005(2.49±0.13)
0.010 minimum clearance
between standoffs and
highest component
2.000 (50.8)
SQ.0.02
0.079
PIN SIDE VIEW
Pin
INPUT/OUTPUT CONNECTIONS
Designation
Function
1
+VIN
Positive Input
2
On/Off 1 Control
Primary On/Off Control
3
No Pin
No Pin
4
–VIN
Negative Input
5
–VOUT
Negative Output
6
+S
Positive Remote Sense
7
–S
Negative Remote Sense
8
SA0
Address Pin 0
9
SA1
Address Pin 1
10
SCL
PMBus Clock
11
SDA
PMBus Data
12
PG
Power Good Output
13
DGND
PMBus Ground
14
SMBALERT
PMBus Alert Signal
15
On/Off 2 Control
Secondary On/Off Control
16
+VOUT
Positive Output
NOTES:
UNLESS OTHERWISE SPECIFIED;
1:M3 SCREW USED TO BOLT UNIT'S BASEPLATE TO OTHER SURFACES
(SUCH AS HEATSINK) MUST NOT EXCEED 0.100''(2.54mm) DEPTH BELOW
THE SURFACE OF BASEPLATE
2:APPLIED TORQUE PER SCREW SHOULD NOT EXCEED 5.3In-lb(0.6Nm);
3:ALL DIMENSION ARE IN INCHES[MILIMETER];
4:ALL TOLERANCES: ×.××in ,±0.02in(×.×mm,±0.5mm)
×.×××in ,±0.01in(×.××mm,±0.25mm)
5:COMPONENT WILL VARY BETWEEN MODELS
6:STANDARD PIN LENGTH: 0.180 Inch
FOR L1 PIN LENGTH OPTION IN MODEL NAME,
THE L LENGTH SHOULD BE 0.110 INCH
FOR L2 PIN LENGTH OPTION IN MODEL NAME.,
USE STANDARD L2 PIN WITH PIN LENGTH TO 0.145 Inch
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only
and may vary between units.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 19 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
STANDARD PACKAGING
9.92
(251.97)
REF
9.92
(251.97)
REF
Each static dissipative polyethylene
foam tray accommodates
15 converters in a 3 x 5 array.
0.88 (22.35)
REF
2.75 (69.85) ±.25
closed height
11.00 (279.4) ±.25
10.50 (266.7) ±.25
Carton accommodates two (2) trays yielding 30 converters per carton
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 20 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
TECHNICAL NOTES
Power Management Overview
The module includes a wide range of readable and configurable power
management features that are easy to implement with a minimum of external
components. Furthermore, the module includes protection features that
continuously protect the load from damage due to unexpected system faults.
The SMBALERT pin alerts the host if there is a fault in the module. The following product parameters can continuously be monitored by a host: Vout, Iout,
Vin, Temperature, and Power Good. The module is distributed with a default
configuration suitable for a wide range operation in terms of Vin, Vout, and
load. All power management functions can be reconfigured using the PMBus
interface. The product provides a PMBus digital interface that enables the user
to configure many aspects of the device operation as well as monitor the input
and output parameters. Please contact our FAE for special configurations.
Soft-start Power Up
The default rise time of the ramp up is 20 ms. When starting by applying
input voltage the control circuit boot-up time adds an additional 10 ms delay.
The soft-start power up of the module can be reconfigured using the PMBus
interface.
Over Voltage Protection (OVP)
The module includes over voltage limiting circuitry for protection of the load.
The default OVP limit is 20% above the nominal output voltage. If the output
voltage surpasses the OVP limit, the module can respond in different ways.
The default response from an over voltage fault is to immediately shut down.
The device will continuously check for the presence of the fault condition,
and when the fault condition no longer exists the device will be re-enabled.
The OVP fault level and fault response can be reconfigured using the PMBus
interface.
Over Current Protection (OCP, Current limit)
The module includes current limiting circuitry for protection at continuous over
load. The default setting for the product is hicup mode. The current limit could
be configured by simply setting the IOUT_OC_FAULT_LIMIT to be greater than
the IOUT_OC_WARN_LIMIT. The maximum value that the current limit could be
set is 50A.
Power Good
The module provides Power Good (PG) flag in the Status Word register that
indicates the output voltage is within a specified tolerance of its target level
and no fault condition exists. The Power Good pin default logic is negative and
it can be configured by MFR_PGOOD_POLARITY.
PMBus Interface
This module offers a PMBus digital interface that enables the user to configure
many characteristics of the device operation as well as to monitor the input
and output voltages, output current and device temperature. The module can
be used with any standard two-wire I2C or SMBus host device. In addition, the
module is compatible with PMBus version 1.2 and includes an SMBALERT line
to help alleviate bandwidth limitations related to continuous fault monitoring.
The module supports 100 kHz and 400 kHz bus clock frequency only.
Monitoring via PMBus
A system controller (host device) can monitor a wide variety of parameters
through the PMBus interface. The controller can monitor fault conditions by
monitoring the SMBALERT pin, which will be asserted when any number of
pre-configured fault or warning conditions occur. The system controller can
also continuously monitor any number of power conversion parameters including but not limited to the following:
• Input voltage
• Output voltage
• Output current
• Module temperature
Software Tools for Design and Production
For these modules, Murata-PS provides software for configuring and monitoring via the PMBus interface. For more information please contact your local
Murata-PS representative.
Click here for Application Note AN-63, Digital DC-DC Evaluation Board
User Guide.
Click here for Application Note AN-64, Murata Power Brick GUI User Manual.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 21 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
PMBus Addressing
Figure 1 and the accompanying table display the recommended resistor values
for hard-wiring PMBus addresses (1% tolerance resistors recommended): The
address is set in the form of two octal (0 to 7) digits, with each pin setting one
digit. The resistor values for each digit is shown below.
The SA0 and SA1 pins can be configured with a resistor to GND according to
the following equation.
PMBus Address = 8 x (SA0value) + (SA1 value)
C0 and C1 are 4.7nF capacitors, which are recommended for correct
addressing. If the calculated PMBus address is 0d, 11d or 12d, PMBus address
119d is assigned instead. From a system point of view, the user shall also be
aware of further limitations of the addresses as stated in the PMBus Specification. It is not recommended to keep the SA0 and SA1 pins left open.
SA0
SA1
R1
R0
C0
C1
Figure 1. Schematic of Connection of Address Resistors
PMBus Commands
The products are designed to be PMBus compliant. The following tables list
the implemented PMBus read commands. For more detailed information see
“PMBus Power System Management Protocol Specification, Part I – General
Requirements, Transport and Electrical Interface” and “PMBus Power System
Management Protocol, Part II – Command Language.”
Digit (SA0, SA1 index)
Resistor Value [kΩ]
0
1
2
3
4
5
6
7
10
22
33
47
68
100
150
220
OVERALL
CMD
Command Name1
01h
02h
03h
10h
11h
12h
15h
16h
19h
20h
21h
22h
25h
26h
28h
40h
41h
42h
46h
47h
4Ah
4Fh
50h
51h
55h
56h
57h
58h
59h
5Ah
5Eh
5Fh
OPERATION2
ON_OFF_CONFIG3
CLEAR_FAULTS
WRITE_PROTECT
STORE_DEFAULT_ALL4
RESTORE_DEFAULT_ALL4
STORE_USER_ALL4
RESTORE_USER_ALL4
CAPABILITY
VOUT_MODE
VOUT_COMMAND
VOUT_TRIM
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_DROOP
VOUT_OV_FAULT_LIMIT
VOUT_OV_FAULT_RESPONSE5
VOUT_OV_WARN_LIMIT
IOUT_OC_FAULT_LIMIT
IOUT_OC_FAULT_RESPONSE6
IOUT_OC_WARN_LIMIT
OT_FAULT_LIMIT
OT_FAULT_RESPONSE5
OT_WARN_LIMIT
VIN_OV_FAULT_LIMIT
VIN_OV_FAULT_RESPONSE7
VIN_OV_WARN_LIMIT
VIN_UV_WARN_LIMIT
VIN_UV_FAULT_LIMIT
VIN_UV_FAULT_RESPONSE7
POWER_GOOD_ON
POWER_GOOD_OFF
SMBus
SMBus
Number
Transaction Type: Transaction Type: Of Data
Writing Data
Reading Data
Bytes
Write Byte
Write Byte
Send byte
Write Byte
Send byte
Send byte
Send byte
Send byte
N/A
N/A
Write Word
Write Word
Write Word
Write Word
Write Word16
Write Word
Write Byte
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Word
Write Byte
Write Word
Write Word
Read Byte
Read Byte
N/A
Read Byte
N/A
N/A
N/A
N/A
Read Byte
Read Byte
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Byte
Read Word
Read Word
Read Byte
Read Word
Read Word
Read Byte
Read Word
Read Word
Read Byte
Read Word
Read Word
Read Word
Read Byte
Read Word
Read Word
1
1
0
1
0
0
0
0
1
1
2
2
2
2
2
2
1
2
2
1
2
2
1
2
2
1
2
2
2
1
2
2
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 22 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
OVERALL (CONT.)
CMD
60h
61h
64h
65h
78h
79h
7Ah
7Bh
7Ch
7Dh
7Eh
88h
8Bh
8Ch
8Dh
94h
95h
96h
98h
99h
9Ah
9Bh
9Dh
9Eh
A0h
A1h
A2h
A3h
A4h
A5h
A6h
A7h
A8h
A9h
B0h
B1h
C0h
DBh
DDh
DEh
E8h
E9h
EAh
Command Name1
TON_DELAY
TON_RISE14
TOFF_DELAY
TOFF_FALL14
STATUS_BYTE
STATUS_WORD
STATUS_VOUT
STATUS_IOUT
STATUS_INPUT
STATUS_TEMPERATURE
STATUS_CML
READ_VIN
READ_VOUT
READ_IOUT
READ_TEMPERATURE_18
READ_DUTY_CYCLE
READ_FREQUENCY
READ_POUT
PMBus_REVISION
MFR_ID
MFR_MODEL9
MFR_REVISION9
MFR_DATE9
MFR_SERIAL9
MFR_VIN_MIN
MFR_VIN_MAX
MFR_IIN_MAX
MFR_PIN_MAX
MFR_VOUT_MIN
MFR_VOUT_MAX
MFR_IOUT_MAX
MFR_POUT_MAX
MFR_TAMBIENT_MAX
MFR_TAMBIENT_MIN
USER_DATA_00
USER_DATA_01
MFR_MAX_TEMP_1
MFR_CURRENT_SHARE_CONFIG
MFR_PRIMARY_ON_OFF_CONFIG
MFR_PGOOD_POLARITY
MFR_VIN_OV_FAULT_HYS
MFR_VIN_UV_FAULT_HYS
MFR_OT_FAULT_HYS
SMBus
SMBus
Number
Transaction Type: Transaction Type: Of Data
Writing Data
Reading Data
Bytes
Write Word16
Write Word16
Write Word16
Write Word16
Write Byte
Write Word
Write Byte
Write Byte
Write Byte
Write Byte
Write Byte
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Block Write
Block Write
N/A
N/A
Write Byte
Write Byte
Write Word
Write Word
Write Word
Read Word
Read Word
Read Word
Read Word
Read Byte
Read Word
Read Byte
Read Byte
Read Byte
Read Byte
Read Byte
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Byte
Block Read
Block Read
Block Read
Block Read
Block Read
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Read Word
Block Read
Block Read
Read Word
Read Byte
Read Byte
Read Byte
Read Word
Read Word
Read Word
2
2
2
2
1
2
1
1
1
1
1
2
2
2
2
2
2
2
1
22
<=20
<=10
<=10
<=10
2
2
2
2
2
2
2
2
2
2
<=20
<=20
2
1
1
1
2
2
2
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 23 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
OVERALL (CONT.)
Notes:
1. a) Unit restores the entire contents of the non-volatile User Store memory when power up
b) PEC is supported
c) Max bus speed: 400kHZ
d) SMBALERT# is supported
e) Linear data format used
f) addressing: If the calculated PMBus address is 0d, 11d or 12d, SA0 or SA1 lefts open, default
PMBus address 119d is assigned instead.
2. Not supported items:
100101XXb Margin Low(Ignore Fault),
101001XXb On Margin High(Ignore Fault)
3. Restart delay of turned off by OPEATION or CONTROL or primary on/off is 200ms
4. Unit will shutdown 1 second for protection , then recover automatically.
5. Restart delay unit: 500ms, lower limit: 500ms.
Turn off delay unit: 0ms, lower limit: 0ms
if bits 7:6=11b, restart delay is 500ms
6. Restart delay unit and Turn off delay unit are same as note 5
Bits 7:6: 00b,01b,10b are not supported
7. Restart delay unit: 200ms, lower limit: 200ms.
Turn off delay unit:0ms, lower limit: 0ms
if bits 7:6=11b, restart delay is 200ms
8. Temperature of baseplate side
9. Unit's actual information
10. Default value of DROOP CURRENT SHARE ENABLED mode: 0x01
Default value of DROOP CURRENT SHARE DISABLED mode: 0x00
11. Locked to 10mΩ in DROOP CURRENT SHARE mode; configurable and default value is 0mΩ in
CURRENT SHARE DISABLED mode
12. Default value of negative logic: 0x04
Default value of positive logic: 0x06
13. Unit can receive any value for VOUT_TRIM command, but Vout is limited to 8.1~13.2V, if calculated Vout exceeds limit, then equal to limit.
14. Value of 0 is acceptable, which is the same as lower limit to unit.
15. Default value of without "B" suffix: 120°C
Default value of with "B" suffix: 125°C
16. Configurable while without "S" suffix locked while with "S" suffix
MURATA-PS DEFINED COMMANDS (01-CFH REFER TO PMBUS 1.2 SPEC)
DBh: MFR_CURRENT_SHARE_CONFIG
Bits
Purpose
Value
Meaning
7:1
0000000 Reserved
0
Current share disabled
Droop Current Share
0
Control
1
Droop current share mode enabled
DDh: MFR_PRIMARY_ON_OFF_CONFIG
Bits
Purpose
Value
7:3
Controls how the
2 unit responds to the
CONTROL pin
Polarity of primary
1
ON/OFF logic
0
On/Off 2 pin
-On/Off 2
On/Off 2
VOUT_DROOP
TON_DELAY
TOFF_DELAY
TON_RISE
TOFF_FALL
-----configurable
configurable
configurable
configurable
configurable
locked to 0x000A locked to 0x0001 locked to 0x0000 locked to 0x0000 locked to 0x0000
Meaning
00000 Reserved
0
Unit ignores the primary ON/OFF pin
Unit requires the primary ON/OFF pin to be
1
asserted to start the unit.
0
Active low (Pull pin low to start the unit)
1
Active high (Pull high or open to start the unit)
0
Reserved
DEh: MFR_ PGOOD_POLARITY
Bits
Purpose
Value
Meaning
7:1
0000000 Reserved
Negative logic, output low if Vout rises to
0
Power good polarity
specific value
0
Positive logic, output high if Vout rises to
of pin 12
1
specific value
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 24 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
STATUS WORD AND BYTE (GREEN = SUPPORTED)
STATUS_VOUT
7 VOUT_OV_FAULT
6 VOUT_OV_WARNING
5 VOUT_UV_WARNING
4 VOUT_UV_FAULT
3 VOUT_MAX Warning
2 TON_MAX_FAULT
1 TOFF_MAX_WARNING
0 VOUT Tracking Error
STATUS_IOUT
7 IOUT_OC_FAULT
6 IOUT_OC_LV_FAULT
5 IOUT_OC_WARNING
4 IOUT_UC_FAULT
3 Current Share Fault
2 In Power Limiting Mode
1 POUT_OP_FAULT
0 POUT_OP_WARNING
STATUS_WORD
7 VOUT
6 IOUT/POUT
5 INPUT
4 MFR_SPECIFIC
3 POWER_GOOD#
2 FANS
1 OTHER
0 UNKNOWN
7 BUSY
6 OFF
5 VOUT_OV_FAULT
4 IOUT_OC_FAULT
3 VIN_UV_FAULT
2 TEMPERATURE
1 CML
0 NONE OF THE ABOVE
STATUS_INPUT
7 VIN_OV_FAULT
6 VIN_OV_WARNING
5 VIN_UV_WARNING
4 VIN_UV_FAULT
2 IIN_OC_FAULT
1 IIN_OC_WARNING
0 PIN_OP_WARNING
STATUS_MFR_SPECIFIC
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
Manufacturer Defined
STATUS_FANS_1_2
STATUS_TEMPERATURE
7 OT_FAULT
6 OT_WARNING
5 UT_WARNING
4 UT_FAULT
3 Reserved
2 Reserved
1 Reserved
0 Reserved
STATUS_OTHER
7 Reserved
6 Reserved
5 Input A Fuse/Breaker Fault
4 Input B Fuse/Breaker Fault
3 Input A OR-ing Device Fault
2 Input B OR-ing Device Fault
1 Output OR-ing Device Fault
0 Reserved
7 Fan 1 Fault
6 Fan 2 Fault
5 Fan 1 Warning
4 Fan 2 Warning
3 Fan 1 Speed Override
2 Fan 2 Speed Override
1 Air Flow Fault
0 Air Flow Warning
STATUS_FANS_3_4
STATUS_CML
7 Invalid/Unsupported Command
6 Invalid/Unsupported Data
5 Packet Error Check Failed
4 Memory Fault Detected
3 Processor Fault Detected
2 Reserved
1 Other Communication Fault
0 Other Memory Or Logic Fault
7 Fan 3 Fault
6 Fan 4 Fault
5 Fan 3 Warning
4 Fan 4 Warning
3 Fan 3 Speed Override
2 Fan 4 Speed Override
1 Reserved
0 Reserved
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 25 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
TECHNICAL NOTES (CONT.)
Parallel Load Sharing (S Option, Droop Load Sharing)
Two or more converters may be connected in parallel at both the input and
output terminals to support higher output current (total power, see figure 2) or
to improve reliability due to the reduced stress that results when the modules
are operating below their rated limits. For applications requiring current share,
followed the guidelines below. The products have a pre-configured voltage
droop. The stated output voltage set point is at no load. The output voltage
will decrease when the load current is increased. The voltage will drop 0.35V
while load reaches max load. Our goal is to have each converter contribute
nearly identical current into the output load under all input, environmental and
load conditions.
Using Parallel Connections – Load Sharing (Power Boost)
Direct Connection Parallel Guidelines

Use a common input power source. The input voltage must be between 36V
and 75V.

+Vout and –Vout of all parallel units should be connected with a balance
output impedance; +Sense and –Sense should be connected together (see
figure 2).

Turn all units off before configuring the output voltage via PMBus commands; all units must have the same output voltage configuration.

It is recommended to turn on one unit first and then turn other unit (s) on
after the output for the first one has settled. Turn on the next unit (s) after the
previous unit reaches its regulated output voltage for at least 10mS. Users
can use a different control signal to turn each unit on.

Users have the option to use a common primary or secondary Remote On/
Off logic control signal to turn on modules at the same time after the input
voltage rises above 36V.

If using PMBus to control units ON/OFF in parallel operation, we suggest to
control one unit on first. After the output voltage is stable, then make other
units' output on.

First power up the parallel system (all converters) with a load not exceeding
the rated load of 60%*35A*UNITS_QUANTITY and allow converters to settle
(typically 20mS) before applying full load (90% load is recommended).

When converters are connected in parallel, allow for a safety factor of at
least 10%. Up to 90% of max output current can be used from each module.

It is critical that the PCB layout incorporates identical connections from each
module to the load; use the same trace rating and airflow/thermal environments. If you add output filter components, use identical components and
layout.

For Power-down, do not soft-off (GUI) while in parallel operation. Power
down units by primary or secondary On/Off signal. Turn units off at the
same time or one by one to avoid the OCP being triggered.
CAUTION: This converter is not internally fused. To avoid danger to persons
or equipment and to retain safety certification, the user must connect an
external fast-blow input fuse as listed in the specifications. Be sure that the PC
board pad area and etch size are adequate to provide enough current so that
the fuse will blow with an overload.
Using Parallel Connections – Redundancy (N+1)
The redundancy connections require external user supplied “OR”ing diodes or
“OR”ing MOSFETs for reliability purposes. The diodes allow for an uninterruptable power system operation in case of a catastrophic failure (shorted output)
by one of the converters.
The diodes should be identical part numbers to enhance balance between
the converters. The default factory nominal voltage should be sufficiently
matched between converters. The OR’ing diode system is the responsibility of
the user. Be aware of the power levels applied to the diodes and possible heat
sink requirements.
Schottky power diodes with approximately 0.3V drops or “OR”ing MOSFETs
may be suitable in the loop whereas 0.7 V silicon power diodes may not be
advisable. In the event of an internal device fault or failure of the mains power
modules on the primary side, the other devices automatically take over the
entire supply of the loads. In the basic N+1 power system, the “N” equals the
number of modules required to fully power the system and “+1” equals one
back-up module that will take over for a failed module. If the system consists
of two power modules, each providing 50% of the total load power under
normal operation and one module fails, another one delivers full power to the
load. This means you can use smaller and less expensive power converters as
the redundant elements, while achieving the goal of increased availability.
Thermal Shutdown
Extended operation at excessive temperature will initiate overtemperature
shutdown triggered by a temperature sensor outside the PWM controller. This
operates similarly to overcurrent and short circuit mode. The inception point
of the overtemperature condition depends on the average power delivered,
the ambient temperature and the extent of forced cooling airflow. Thermal
shutdown uses only the hiccup mode (autorestart) and PMBus configurable
hysteresis.
Start Up Considerations
When power is first applied to the DC-DC converter, there is some risk of start
up difficulties if you do not have both low AC and DC impedance and adequate
regulation of the input source. Make sure that your source supply does not allow
the instantaneous input voltage to go below the minimum voltage at all times.
Use a moderate size capacitor very close to the input terminals. You may
need two or more parallel capacitors. A larger electrolytic or ceramic cap supplies the surge current and a smaller parallel low-ESR ceramic cap gives low
AC impedance.
Remember that the input current is carried both by the wiring and the
ground plane return. Make sure the ground plane uses adequate thickness
copper. Run additional bus wire if necessary.
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs of
power conversion components. Fuses should also be used when there is the
possibility of sustained input voltage reversal which is not current-limited. For
greatest safety, we recommend a fast blow fuse installed in the ungrounded
input supply line.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 26 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
Figure 2. Load Sharing Block Diagram
Input Under-Voltage Shutdown and Start-Up Threshold
Converters will not begin to regulate properly until the rising input voltage
exceeds and remains at the Start-Up Threshold Voltage (see Specifications).
Once operating, converters will not turn off until the input voltage drops below
the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the
input voltage rises again above the Start-Up Threshold. This built-in hysteresis
prevents any unstable on/off operation at a single input voltage. The over/
under-voltage fault level and fault response and hysterisis can be configured
via the PMBus interface.
Start-Up Time
Start-Up Time (see Specifications) is the time interval between the point when
the rising input voltage crosses the Start-Up Threshold and the output voltage
enters and remains within its specified accuracy band.
These converters include a soft start circuit to control Vout ramp time,
thereby limiting the input inrush current.
The On/Off Remote Control interval from On command to Vout (final ±5%)
assumes that the converter already has its input voltage stabilized above the
Start-Up Threshold before the On command. The interval is measured from the
On command until the output enters and remains within its specified accuracy
band.
Recommended Input Filtering
The user must assure that the input source has low AC impedance to provide
dynamic stability and that the input supply has little or no inductive content,
including long distributed wiring to a remote power supply. The converter will
operate with no additional external capacitance if these conditions are met.
For best performance, we recommend installing a low-ESR capacitor
immediately adjacent to the converter’s input terminals. The capacitor should
be a ceramic type such as the Murata GRM32 series or a polymer type. More
input bulk capacitance may be added in parallel (either electrolytic or tantalum)
if needed.
Recommended Output Filtering
The converter will achieve its rated output ripple and noise with no additional
external capacitor. However, the user may install more external output capacitance to reduce the ripple even further or for improved dynamic response.
Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors.
Mount these close to the converter. Measure the output ripple under your load
conditions.
Use only as much capacitance as required to achieve your ripple and noise
objectives. Excessive capacitance can make step load recovery sluggish or
possibly introduce instability. Do not exceed the maximum rated output capacitance listed in the specifications.
Input Ripple Current and Output Noise
All models in this converter series are tested and specified for input reflected
ripple current and output noise using designated external input/output components, circuits and layout as shown in the figures below. The Cbus and Lbus
components simulate a typical DC voltage bus.
Minimum Output Loading Requirements
All models regulate within specification and are stable under no load to full
load conditions.
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MDC_DBQ Series.B02Δ Page 27 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
TO
OSCILLOSCOPE
CURRENT
PROBE
+Vin
VIN
+
–
+
–
+Vout
LBUS
CBUS
C1
CIN
-Vin
C2
SCOPE
RLOAD
-Vout
CIN = 220μF, ESR < 700mΩ @ 100kHz
CBUS = 220μF, ESR < 100mΩ @ 100kHz
LBUS = 12μH
Figure 3. Measuring Input Ripple Current
C1 = 1μF; C2 = 10μF
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 4. Measuring Output Ripple and Noise (PARD)
Thermal Shutdown (OTP, UTP)
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC-DCs to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature sensor
will power down the unit. When the temperature decreases below the turn-on
threshold set in the command recover temp is (OT_FAULT_LIMIT-MFR_OT_
FAULT_HYS), the hysteresis is defined in general electrical specification
section. The OTP and hysteresis of the module can be reconfigured using the
PMBus. The OTP and UTP fault limit and fault response can be configured via
the PMBus.
CAUTION: If you operate too close to the thermal limits, the converter may
shut down suddenly without warning. Be sure to thoroughly test your application to avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable
under increasing forced airflow measured in Linear Feet per Minute (“LFM”).
Note that these are AVERAGE measurements. The converter will accept brief
increases in current or reduced airflow as long as the average is not exceeded.
Note that the temperatures are of the ambient airflow, not the converter
itself which is obviously running at higher temperature than the outside air.
Also note that “natural convection” is defined as very flow rates which are not
using fan-forced airflow. Depending on the application, “natural convection” is
usually about 30-65 LFM but is not equal to still air (0 LFM).
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated airflow. We use both thermocouples and an
infrared camera system to observe thermal performance. As a practical matter,
it is quite difficult to insert an anemometer to precisely measure airflow in
most applications. Sometimes it is possible to estimate the effective airflow if
you thoroughly understand the enclosure geometry, entry/exit orifice areas and
the fan flowrate specifications.
CAUTION: If you exceed these Derating guidelines, the converter may have
an unplanned Over Temperature shut down. Also, these graphs are all collected
near Sea Level altitude. Be sure to reduce the derating for higher altitude.
Output Short Circuit Condition
The short circuit condition is an extension of the “Current Limiting” condition.
When the monitored peak current signal reaches a certain range, the PWM
controller’s outputs are shut off thereby turning the converter “off.” This is
followed by an extended time out period. This period can vary depending on
other conditions such as the input voltage level. Following this time out period,
the PWM controller will attempt to re-start the converter by initiating a “normal
start cycle” which includes softstart. If the “fault condition” persists, another
“hiccup” cycle is initiated. This “cycle” can and will continue indefinitely until
such time as the “fault condition” is removed, at which time the converter will
resume “normal operation.” Operating in the “hiccup” mode during a fault
condition is advantageous in that average input and output power levels are
held low preventing excessive internal increases in temperature.
Remote On/Off Control
The DBQ series modules are equipped with both primary (On/Off 1, enabled,
pull up internal) and secondary (On/Off 2, disabled, pull up internal) control pins
for increased system flexibility. Both are configurable via PMBus. The On/Off
pins are TTL open-collector and/or CMOS open-drain compatible. (See general
specifications for threshold voltage levels. See also MFR_PRIMARY_ON_OFF_
CONFIG section.)
Negative-logic models are on (enabled) when the On/Off is grounded or
brought to within a low voltage (see specifications) with respect to –Vin.
The device is off (disabled) when the On/Off is left open or is pulled high to
+13.5Vdc with respect to –Vin. The On/Off function allows the module to be
turned on/off by an external device switch.
Positive-logic models are enabled when the On/Off pin is left open or is
pulled high to +13.5V with respect to –Vin. Positive-logic devices are disabled
when the On/Off is grounded or brought to within a low voltage (see specifications) with respect to –Vin. For voltage levels for On/Off 2 signal see functional
specifications.
The restart delay for this module to turn On/Off by the On/Off control pin is
200ms.
On/Off 1 or 2 Control status
Not ignored
On/Off 1 or 2 pin
OPEN
PULL HIGH
PULL LOW
P LOGIC
ON
ON
OFF
Ignored
N LOGIC
OFF
OFF
ON
P LOGIC
ON
ON
ON
N LOGIC
ON
ON
ON
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MDC_DBQ Series.B02Δ Page 28 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
On/Off 1 can be configured by PMBus command MFR_PRIMARY_ON_OFF_
CONFIG (DDh); default configuration is not ignored; required On/Off 1 control
pin to be asserted to start the unit.
On/Off 2 can be configured by PMBus command ON_OFF_CONFIG (02h);
default configuration is ignored; treat it as always ON.
DBQ's On/Off status is dependent on On/Off 1 control, On/Off 2 control, and
OPERATION (PMBus command) status; all three must be ON to turn DBQ on; if
one of them is OFF, unit will be turned off.
Output Capacitive Load
These converters do not require external capacitance added to achieve rated
specifications. Users should only consider adding capacitance to reduce
switching noise and/or to handle spike current load steps. Install only enough
capacitance to achieve noise objectives. Excess external capacitance may
cause degraded transient response and possible oscillation or instability.
Remote Sense Input
Use the Sense inputs with caution. Sense is normally connected at the load.
Sense inputs compensate for output voltage inaccuracy delivered at the load.
Contact and PCB resistance
losses due to IR drops
+VOUT
−VIN
I OUT
+SENSE
Sense Current
ON/OFF
CONTROL
LOAD
Sense Return
−SENSE
I OUT Return
+VIN
-VOUT
Contact and PCB resistance
losses due to IR drops
This is done by correcting IR voltage drops along the output wiring and the
current carrying capacity of PC board etch. This output drop (the difference
between Sense and Vout when measured at the converter) should not exceed
0.5V. Consider using heavier wire if this drop is excessive. Sense inputs also
improve the stability of the converter and load system by optimizing the control
loop phase margin.
Note: The Sense input and power Vout lines are internally connected through
low value resistors to their respective polarities so that the converter can
operate without external connection to the Sense. Nevertheless, if the Sense
function is not used for remote regulation, the user should connect +Sense to
+Vout and –Sense to –Vout at the converter pins.
The remote Sense lines carry very little current. They are also capacitively
coupled to the output lines and therefore are in the feedback control loop to
regulate and stabilize the output. As such, they are not low impedance inputs
and must be treated with care in PC board layouts. Sense lines on the PCB
should run adjacent to DC signals, preferably Ground. In cables and discrete
wiring, use twisted pair, shielded tubing or similar techniques.
Any long, distributed wiring and/or significant inductance introduced into the
Sense control loop can adversely affect overall system stability. If in doubt, test
your applications by observing the converter’s output transient response during
step loads. There should not be any appreciable ringing or oscillation. You
may also adjust the output trim slightly to compensate for voltage loss in any
external filter elements. Do not exceed maximum power ratings.
Please observe Sense inputs tolerance to avoid improper operation:
[Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] ≤ 5% of Vout
Output overvoltage protection is monitored at the output voltage pin, not the
Sense pin. Therefore excessive voltage differences between Vout and Sense
together with trim adjustment of the output can cause the overvoltage protection circuit to activate and shut down the output.
Power derating of the converter is based on the combination of maximum
output current and the highest output voltage. Therefore the designer must
ensure:
(Vout at pins) x (Iout) ≤ (Max. rated output power)
Figure 5. Remote Sense Circuit Configuration
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these
converters. These specifications vary depending on the solder type. Exceeding these
specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your
production environment may differ; therefore please thoroughly review these guidelines
with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
115° C.
Maximum Pot Temperature
270° C.
Maximum Solder Dwell Time
7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature
105° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
6 seconds
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MDC_DBQ Series.B02Δ Page 29 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
Emissions Performance
Murata Power Solutions measures its products for conducted emissions
against the EN 55022 and CISPR 22 standards. Passive resistance loads are
employed and the output is set to the maximum voltage. If you set up your
own emissions testing, make sure the output load is rated at continuous power
while doing the tests.
The recommended external input and output capacitors (if required) are
included. Please refer to the fundamental switching frequency. All of this
information is listed in the Product Specifications. An external discrete filter is
installed and the circuit diagram is shown below.
[3] Conducted Emissions Test Results
VCC
RTN
L1
C1 C2
C3
L2
+
C4 C5
C6 C7
+
DC/DC
C12
LOAD
-48V
C8
C9
C10
GND
C11
GND
Figure 6. Conducted Emissions Test Circuit
Graph 1. Conducted emissions performance, Positive Line,
CISPR 22, Class B, full load
[1] Conducted Emissions Parts List
Reference
C1, C2, C3, C4, C5
C6
L1, L2
C8, C9, C10, C11
C7
C12
Part Number
Description
Vendor
SMD CERAMIC-100VGRM32ER72A105KA01L
Murata
1000nF-X7R-1210
SMD CERAMIC100V-100nFGRM319R72A104KA01D
Murata
±10%-X7R-1206
COMMON MODE-473uHPG0060T
Pulse
±25%-14A
SMD CERAMIC630V-0.22uFGRM55DR72J224KW01L
Murata
±10%-X7R-2220
Aluminum100V-220UfUHE2A221MHD
Nichicon
±10%-long lead
NA
[2] Conducted Emissions Test Equipment Used
Hewlett Packard HP8594L Spectrum Analyzer – S/N 3827A00153
2Line V-networks LS1-15V 50Ω/50Uh Line Impedance Stabilization Network
Graph 2. Conducted emissions performance, Negative Line,
CISPR 22, Class B, full load
[4] Layout Recommendations
Most applications can use the filtering which is already installed inside the
converter or with the addition of the recommended external capacitors. For
greater emissions suppression, consider additional filter components and/or
shielding. Emissions performance will depend on the user’s PC board layout,
the chassis shielding environment and choice of external components. Please
refer to Application Note GEAN-02 for further discussion.
Since many factors affect both the amplitude and spectra of emissions, we
recommend using an engineer who is experienced at emissions suppression.
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MDC_DBQ Series.B02Δ Page 30 of 31
DBQ/DVQ Series
420W Digital Fully Regulated Intermediate
DC-DC Bus Converter
IR Transparent
optical window
Unit under
test (UUT)
IR Video
Camera
Precision
low-rate
anemometer
3” below UUT
Ambient
temperature
sensor
Airflow
collimator
Vertical Wind Tunnel
Murata Power Solutions employs a computer controlled
custom-designed closed loop vertical wind tunnel, infrared
video camera system, and test instrumentation for accurate
airflow and heat dissipation analysis of power products.
The system includes a precision low flow-rate anemometer,
variable speed fan, power supply input and load controls,
Variable
temperature gauges, and adjustable heating element.
speed fan
The IR camera monitors the thermal performance of the
Unit Under Test (UUT) under static steady-state conditions. A
special optical port is used which is transparent to infrared
wavelengths.
Both through-hole and surface mount converters are
soldered down to a 10" x 10" host carrier board for realistic
heat absorption and spreading. Both longitudinal and transverse airflow studies are possible by rotation of this carrier
Heating
board since there are often significant differences in the heat
element
dissipation in the two airflow directions. The combination of
adjustable airflow, adjustable ambient heat, and adjustable
Input/Output currents and voltages mean that a very wide
range of measurement conditions can be studied.
The collimator reduces the amount of turbulence adjacent
to the UUT by minimizing airflow turbulence. Such turbulence influences the effective heat transfer characteristics
and gives false readings. Excess turbulence removes more
heat from some surfaces and less heat from others, possibly
causing uneven overheating.
Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating
element and fan, built-in temperature gauges, and no-contact
IR camera mean that power supplies are tested in real-world
conditions.
Figure 7. Vertical Wind Tunnel
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_DBQ Series.B02Δ Page 31 of 31