CUI NQB-500DWA-DDNJ-000-ESA Fully regulated advanced bus converter Datasheet

date 02/20/2013
page
1 of 36
SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
GENERAL CHARACTERISTICS
FEATURES
•
•
•
•
•
•
•
• quarter-brick with
digital PMBus interface
57.9 x 36.8 x 11.3 mm
(2.28 x 1.45 x 0.445 in)
• industry standard 5-pins for
intermediate bus architectures
• industry-leading power density for
telecom and datacom 127~141W / sq. in
• high efficiency, typ. 96.4% at half load,
12 Vout
• fully regulated advanced bus converter
from 36~75Vin
• 2,250 Vdc input to output isolation
• fast feed forward regulation to manage
line transients
• optional baseplate for high temperature
applications
• droop load sharing with 10% current
share accuracy
• PMBus Revision 1.2 compliant
• 2.9 million hours MTBF
• ISO 9001/14001 certified supplier
• Ericsson BMR453 & BMR456 compatible
configurable soft start/stop
precision delay and ramp-up
voltage margining
voltage/current/temperature monitoring
configurable output voltage
configurable fault response
power good
MODEL
input voltage
output voltage
output current
output wattage
(Vdc)
(Vdc)
max
(A)
max
(W)
NQB-420DWA-AN
36~75
12
35
420
NQB-468DMA-AN
40~60
12
39
468
NQB-415DWB-AN
36~75
12.45
35
415
NQB-462DMB-AN
40~60
12.45
39
462
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 2 of 36
PART NUMBER KEY
NQB- XXX D X X - X X X X - XXX -ES X
Base Number
Engineering Phase:
A~Z
Design Output Power:
1~999
Engineering Sample:
ES
Digital Interface
Firmware Configuration:
000~ZZZ
Input Voltage Range:
W = wide (36~75 V)
M = medium (40~60 V)
Heatsink Option:
"blank" = open frame
H = heatsink flat
L = heatsink lateral fins
T = heatsink transverse fins
G = heatsink with GND pin
Nominal Output Voltage:
A = 12.0 V
B = 12.45 V
C = 9.6 V
Load Sharing Function:
D = 9.0 V
D = Vout droop
E = 5.0 V
Enable Logic Sense:
N = negative logic
P = positive logic
Pin Description:
A = 5.33 mm (0.210 in.)
B = 4.57 mm (0.180 in.)
C = 3.69 mm (0.145 in.)
D = 2.79 mm (0.110 in.)
S = SMT
Example part number: NQB-420DWA-AN-001
Packaging:
20 converters(through hole pin)/tray, PE foam dissipative
20 converters(surface mount pin)/tray, Antistatic PPE
420 W output power, digital pins
wide input voltage range, 12.0 V output
5.33 mm pins, negative enable logic
firmware revision 001
CONTENTS
Part Number Key........................................................2
General Information...................................................3
Safety Specification....................................................3
Absolute Maximum Ratings..........................................4
Electrical Specification:
12V, 35A, 420W, 36~75Vin; NQB-420DWA-AN....................6
12V, 39A, 468W, 40~60Vin; NQB-468DMA-AN...................10
12.45V, 35A, 415W, 36~75Vin; NQB-415DWB-AN...............14
12.45V, 39A, 462W, 40~60Vin; NQB-420DMB-AN...............19
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EMC Specification.........................................20
Operating Information...................................21
Thermal Consideration..................................24
Connections............................................25
PMBus Interface...........................................26
Mechanical Information.................................29
Soldering Information...................................32
Delivery Package Information.........................33
Product Qualification Specification...................35
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 3 of 36
General Information
Reliability
The failure rate (λ) and mean time between failures
(MTBF= 1/ λ) is calculated at max output power and
an operating ambient temperature (TA) of +40°C. CUI
Power Modules uses Telcordia SR-332 Issue 2 Method 1 to
calculate the mean steady-state failure rate and standard
deviation (σ).
Telcordia SR-332 Issue 2 also provides techniques to
estimate the upper confidence levels of failure rates based
on the mean and standard deviation.
Component power supplies for general use should comply
with the requirements in IEC/EN/UL 60950 1 Safety
of Information Technology Equipment. Product related
standards, e.g. IEEE 802.3af Power over Ethernet, and
ETS 300132 2 Power interface at the input to telecom
equipment, operated by direct current (dc) are based on
IEC/EN/UL 60950 1 with regards to safety.
CUI Power Modules DC/DC converters and DC/DC
regulators are UL 60950 1 recognized and certified in
accordance with EN 60950 1. The flammability rating for
all construction parts of the products meet requirements
for V 0 class material according to IEC 60695 11 10, Fire
hazard testing, test flames – 50 W horizontal and vertical
flame test methods.
Mean steady-state failure rate, λ Std. deviation, σ
421 n F ailures/h
the requirements of all applicable safety standards and
regulations for the final product.
60.9 nF ailures/h
MTBF (mean value) for the NQB series = 2.9 Mh.
MTBF at 90% confidence level = 2.4 Mh
Compatibility with RoHS requirements
Isolated DC/DC converters
The products are compatible with the relevant clauses
and requirements of the RoHS directive 2011/65/EU and
have a maximum concentration value of 0.1% by weight
in homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Galvanic isolation between input and output is verified
in an electric strength test and the isolation voltage
(Viso) meets the voltage strength requirement for basic
insulation according to IEC/EN/UL 60950-1.
It is recommended to use a slow blow fuse at the input
of each DC/DC converter. If an input filter is used in the
circuit the fuse should be placed in front of the input filter.
In the rare event of a component problem that imposes a
short circuit on the input source, this fuse will provide the
following functions:
•
Isolate the fault from the input power source so as
not to affect the operation of other parts of the system
•
Protect the distribution wiring from excessive current and power loss thus preventing hazardous
overheating
Exemptions in the RoHS directive utilized in CUI
Power Modules products are found in the Statement of
Compliance document.
Safety Specification
Reliability
CUI Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with the safety
standards IEC 60950 1, EN 60950 1 and UL 60950 1
Safety of Information Technology Equipment.
IEC/EN/UL 60950 1 contains requirements to prevent
injury or damage due to the following hazards:
•
Electrical shock
•
Energy hazards
•
Fire
•
Mechanical and heat hazards
•
Radiation hazards
•
Chemical hazards
On-board DC/DC converters and DC/DC regulators are
defined as component power supplies. As components
they cannot fully comply with the provisions of any
safety requirements without “conditions of acceptability”.
Clearance between conductors and between conductive
parts of the component power supply and conductors on
the board in the final product must meet the applicable
safety requirements. Certain conditions of acceptability
apply for component power supplies with limited stand-off
(see Mechanical Information for further information). It is
the responsibility of the installer to ensure that the final
product housing these components complies with
The DC/DC converter output is considered as safety extra
low voltage (SELV) if one of the following conditions is
met:
•
The input source has double or reinforced insulation from the AC mains according to IEC/EN/
UL 60950-1
•
The input source has basic or supplementary insulation from the AC mains and the input of the DC/DC converter is maximum 60 Vdc and connected to protective earth according to
IEC/EN/UL 60950-1
•
The input source has basic or supplementary insulation from the AC mains and the DC/DC converter output is connected to protective earth
according to IEC/EN/UL 60950-1
Non - isolated DC/DC regulators
The DC/DC regulator output is SELV if the input source
meets the requirements for SELV circuits according to IEC/
EN/UL 60950-1.
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 4 of 36
Absolute Maximum Ratings
parameter
conditions/description
min
operating temperature (TP1)
see thermal consideration section
typ
max
units
-40
+125
°C
storage temperature (TS)
-55
+125
°C
input voltage (VI)
-0.5
+80
+65*
V
isolation voltage (Viso)
input to output test voltage, see note 1
2250
Vdc
input voltage transient (Vtr)
according to ETSI EN 300 132-2 and Telcordia GR1089-CORE
+100
+80*
V
remote control pin voltage (VRC)
see operating information section
-0.3
18
V
-0.3
3.6
V
SALERT, CTRL, SCL, SDA, SA0,
SA1 (V Logic I/O)
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are normally tested with one
parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an unspecified
manner.
Note
1: Isolation voltage (input/output to base-plate) max 750 Vdc.
* Applies for the narrow input version VI= 40-60 V
Fundamental Circuit Diagram
Driver
+IN
+OUT
-OUT
-IN
Auxillary
Supply
Driver
Control
RC
RC isolation
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 5 of 36
Functional Description
TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: TP1, TP3 = +25°C, VI= 53 V, max IO , unless otherwise specified under Conditions
Configuration File: 190 10-CDA 102 0314/001
parameter
conditions/description
min
typ
max
units
-2
±0.2
2
%
PMBus monitoring accuracy
input voltage (VIN_READ)
output voltage (VOUT_READ)
VI = 53V
-1.0
±0.1
1.0
%
output current (IOUT_READ)
VI = 53V, 50-100% of max IO
VI = 53V, 10% of max IO
-6
-0.6
±0.15
6
0.6
%
A
-5
±3.5
5
ºC
temperature (TEMP_READ)
fault protection
characteristics
input under voltage lockout
(UVLO)
factory default
setpoint accuracy
hysteresis: factory default
hysteresis: configurable via PMBus of threshold
range, note 1
delay
output voltage - under voltage
protection (VOUT_UV_FAULT_
LIMIT)
factory default
configurable via PMBus, note 1
fault response time
0
output voltage - over voltage
protection (VOUT_OV_FAULT_
LIMIT)
factory default
configurable via PMBus, note 1
fault response time
VOUT
over current protection (OCP)
setpoint accuracy (IO)
IOUT_OC_FAULT_LIMIT factory default
IOUT_OC_FAULT_LIMIT, configurable via PMBus,
note 1
fault response time
over temperature protection
(OTP)
OTP_FAULT_LIMIT, factory default
OTP_FAULT_LIMIT, configurable via PMBus, note 1
hysteresis, factory default
hysteresis, configurable via PMBus, note 1
fault response time
-2
0
33
2
2
300
-6
0
0
200
15.6
200
41
μs
16
V
V
μs
16
V
V
μs
6
100
200
-50
0
125
10
300
V
%
V
V
%
A
A
μs
125
125
ºC
ºC
ºC
ºC
μs
logic input/output
characteristics
logic input low (VIL)
CTRL, SA0, SA1, PG, SCL, SDA
logic input high (VIH)
CTRL, SA0, SA1, PG, SCL, SDA
logic output low (VOL)
CTRL, PG, SALERT, SCL, SDA
IOL = 6 mA
logic output high (VOH)
CTRL, PG, SALERT, SCL, SDA
IOH = -6 mA
2.7
V
bus free time T(BUF)
note 2
1.3
μs
Note
1.1
2.1
V
0.25
1: See Operating Information section.
2: PMBus timing parameters according to PMBus spec.
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V
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 6 of 36
Electrical Specification
12.0 V, 35 A, 420 W
TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cout = 3.5 mF, Configuration File: 19010-CDA 102 0314/001
parameter
conditions/description
min
input voltage range (VI)
typ
36
max
units
75
V
turn-off input voltage (VIoff)
decreasing input voltage
32
33
34
V
turn-on input voltage (VIon)
increasing input voltage
34
35
36
V
internal input capacitance (CI)
18
output power (PO)
0
μF
420
W
efficiency (η)
50% of max IO
max IO
50% of max IO, VI = 48 V
max IO, VI = 48 V
96.2
95.5
96.4
95.5
power dissipation (Pd)
max IO
19.8
input idling power (Pli)
IO = 0 A, VI = 53 V
3.3
W
input standby power (PRC)
VI = 53 V (turned off with RC)
0.4
W
default switching frequency (fs)
0-100% of max IO
output voltage initial setting
and accuracy (VOi)
TP1 = +25°C, VI = 53 V, IO = 35 A
output adjust range (VO)
see operating information
output voltage tolerance band
(VO)
0-100% of max IO
line regulation (VO)
max IO
load regulation (VO)
VI = 53 V, 0-100% of max IO
load transient voltage deviation
(Vtr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
±0.4
V
load transient recovery time
(ttr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
150
µs
ramp-up time (tr) - (from
10−90% of VOi)
10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V
8
ms
start-up time (ts) - (from VI
connection to 90% of VOi)
10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V
24
ms
VI shut-down fall time (tf) (from VI off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
3.6
7
ms
s
RC start-up time (tRC)
max IO
12
ms
RC shut-down fall time (tRC) (from RC off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
5.1
7
ms
s
output current (IO)
VO = 10.8 V, TP1, TP3 < max TP1, TP3
short circuit current (Isc)
TP1, TP3 = 25ºC, see Note 1
recommended capacitive load
(Cout)
TP1, TP3 = 25ºC, see Note 2
output ripple & noise (VOac)
over voltage protection (OVP)
remote control (RC)
sink current (note 4), see operating information
trigger level, decreasing RC-voltage
trigger level, increasing RC-voltage
Note
1:
2:
3:
4:
29.5
W
133
140
147
kHz
11.88
12.0
12.12
V
4.0
13.2
V
11.76
12.24
V
21
55
mV
6
40
mV
0
current limit threshold (Ilim)
%
%
%
%
37
41
35
A
44
A
12
0.1
A
3.5
6
mF
See ripple & noise section, max IO , see Note 3
60
150
mVp-p
TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO
15.6
2.6
2.9
OCP in hic-up mode
Low ESR-value
Cout = 100 µF, external capacitance
Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
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0.7
mA
V
V
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 7 of 36
Typical Characteristics
12.0 V, 35 A / 420 W
Efficiency
Power Dissipation
[W]
24
[%]
100
20
95
53 V
53 V
8
75 V
80
48 V
12
48 V
85
36 V
16
36 V
90
75 V
4
75
0
0
5
10
15
20
25
30
0
35 [A]
5
10
15
20
25
30
35 [A]
Dissipated power vs. load current and input voltage at
TP1, TP3 = +25°C
Efficiency vs. load current and input voltage at TP1, TP3 = +25 C
Output Characteristics
Current Limit Characteristics
[V]
[V]
13.0
12.2
11.0
12.1
36 V
48 V
12.0
53 V
75 V
11.9
36 V
9.0
48 V
53 V
7.0
75 V
5.0
11.8
0
5
10
15
20
25
30
3.0
35 [A]
35
Output voltage vs. load current at TP1, TP3 = +25°C
37
39
41
43
45 [A]
Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 8 of 36
Typical Characteristics
12.0 V, 35 A / 420 W
Start-up
Start-up enabled by connecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 35 A resistive load.
Shut-down
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
Output Ripple & Noise
Output voltage ripple at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 35 A resistive load.
Shut-down enabled by disconnecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO =35 A resistive load.
Output Load Transient Response
Trace: output voltage (50 mV/div.).
Time scale: (2 µs/div.).
Output voltage response to load current
step-change (8.75-26.25-8.75 A) at:
TP1, TP3 =+25°C, VI = 53 V, CO = 3.5 mF.
Input Voltage Transient Response
Output voltage response to input voltage
transient at: TP1, TP3 = +25°C, VI = 36-75 V,
IO = 17 A resistive load, CO = 3.5 mF
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (2 ms/div.).
Top trace: output voltage (2 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: (0.5 ms/div.).
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Top trace: output voltage (0.5 V/div.).
Bottom trace: output current (20 A/div.).
Time scale: (0.5 ms/div.).
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 9 of 36
Typical Characteristics
12.0 V, 35 A / 420 W
Output Current Derating – Open frame
[A]
35
3.0 m/s
30
2.0 m/s
25
1.5 m/s
20
15
1.0 m/s
10
0.5 m/s
5
Na t. Co nv.
0
0
20
40
60
80
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate
Thermal Resistance – Base plate
[A]
35
[°C/W]
6
3.0 m/s
30
5
2.0 m/s
25
4
1.5 m/s
20
15
1.0 m/s
10
0.5 m/s
5
3
2
1
Na t. Con v.
0
0
0
20
40
60
80
0.0
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
0.5
1.0
1.5
2.0
2.5
3.0 [m/s]
Thermal resistance vs. airspeed measured at the converter. Tested in
wind tunnel with airflow and test conditions as per the Thermal
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
[A]
35
A
30
25
20
15
10
3.0 m/s
40
35
2.0 m/s
30
1.5 m/s
25
1.0 m/s
20
15
0.5 m/s
10
Na t. Con v.
5
0
0
20
40
60
80
Ta mb
85 °C
5
0
0
100 [°C]
20
40
60
80
100 [°C]
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Thermal Consideration section.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section. Tested with Plate Fin
Transverse heatsink, height 0.23 In, P0114 Thermal Pad.
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 10 of 36
Electrical Specification
12.0 V, 39 A / 468 W
TP1, TP3 = -40 to +90ºC, VI = 40 to 60 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/002
parameter
conditions/description
min
input voltage range (VI)
typ
40
max
units
60
V
V
turn-off input voltage (VIoff)
decreasing input voltage
36
37
38
turn-on input voltage (VIon)
increasing input voltage
38
39
40
internal input capacitance (CI)
18
output power (PO)
0
V
μF
468
W
efficiency (η)
50% of max IO
max IO
50% of max IO, VI = 48 V
max IO, VI = 48 V
96.7
95.7
96.8
95.6
%
%
%
%
power dissipation (Pd)
max IO
21.2
input idling power (Pli)
IO = 0 A, VI = 53 V
input standby power (PRC)
VI = 53 V (turned off with RC)
default switching frequency (fs)
0-100% of max IO
output voltage initial setting
and accuracy (VOi)
TP1 = +25°C, VI = 53 V, IO = 39 A
output adjust range (VO)
see operating information
output voltage tolerance band
(VO)
0-100% of max IO
line regulation (VO)
max IO
load regulation (VO)
VI = 53 V, 1-100% of max IO
load transient voltage deviation
(Vtr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
±0.4
V
load transient recovery time
(ttr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
150
µs
ramp-up time (tr) - (from
10−90% of VOi)
10-100% of max IO, TP1 = 25ºC, VI = 53 V
8
ms
start-up time (ts) - (from VI
connection to 90% of VOi)
10-100% of max IO, TP1 = 25ºC, VI = 53 V
24
ms
VI shut-down fall time (tf) (from VI off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
3
7
ms
s
RC start-up time (tRC)
max IO
12
ms
RC shut-down fall time (tRC) (from RC off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
4.5
7
ms
s
30.5
2.8
W
0.4
output current (IO)
VO = 10.8 V, TP1, TP3 < max TP1, TP3
short circuit current (Isc)
TP1 = 25ºC, see Note 1
recommended capacitive load
(Cout)
TP1 = 25ºC, see Note 2
output ripple & noise (VOac)
W
133
140
147
kHz
11.88
12.0
12.12
V
4.0
13.2
V
11.76
12.24
V
31
60
mV
5
25
mV
0
current limit threshold (Ilim)
W
41
44
39
A
47
A
14
3.9
6
mF
See ripple & noise section, max IO , see Note 3
50
110
mVp-p
over voltage protection (OVP)
TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO
15.6
remote control (RC)
sink current (note 4), see operating information
trigger level, decreasing RC-voltage
trigger level, increasing RC-voltage
0.7
mA
V
V
Note
1:
2:
3:
4:
0.1
A
2.6
2.9
OCP in hic-up mode
Low ESR-value
Cout = 100 µF, external capacitance
Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 11 of 36
Typical Characteristics
12.0 V, 39 A / 468 W
Efficiency
Power Dissipation
[%]
[W]
25
100
20
95
40 V
90
48 V
60 V
80
48 V
53 V
10
53 V
85
40 V
15
60 V
5
0
75
0
5
10
15
20
25
30
35
40 [A]
0
5
10
15
20
25
30
35
40 [A]
Dissipated power vs. load current and input voltage at
TP1, TP3 = +25°C
Efficiency vs. load current and input voltage at TP1, TP3 = +25 C
Output Characteristics
Current Limit Characteristics
[V]
[V]
13.0
12.2
11.0
12.1
40 V
48 V
12.0
53 V
60 V
11.9
40 V
9.0
48 V
7.0
53 V
60 V
5.0
11.8
3.0
0
5
10
15
20
25
30
35
40 [A]
39
Output voltage vs. load current at TP1, TP3 = +25°C
41
43
45
47 [A]
Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 12 of 36
Typical Characteristics
12.0 V, 39 A / 468 W
Start-up
Start-up enabled by connecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 39 A resistive load.
Shut-down
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
Output Ripple & Noise
Output voltage ripple at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 39 A resistive load.
Shut-down enabled by disconnecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO =39 A resistive load.
Output Load Transient Response
Trace: output voltage (50 mV/div.).
Time scale: (2 µs/div.).
Output voltage response to load current
step-change (9.75-29.25-9.75 A) at:
TP1, TP3 =+25°C, VI = 53 V, CO = 3.9 mF.
Input Voltage Transient Response
Output voltage response to input voltage
transient at: TP1, TP3 = +25°C, VI = 40-60 V,
IO = 19,5 A resistive load, CO = 3.9 mF
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (2 ms/div.).
Top trace: output voltage (2 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: (0.5 ms/div.).
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Top trace: output voltage (0.5 V/div.).
Bottom trace: output current (20 A/div.).
Time scale: (0.5 ms/div.).
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 13 of 36
Typical Characteristics
12.0 V, 39 A / 468 W
Output Current Derating – Open frame
[A]
40
35
3.0 m/s
30
2.0 m/s
25
1.5 m/s
20
1.0 m/s
15
0.5 m/s
10
Na t. Con v.
5
0
0
20
40
60
80
100
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate
Thermal Resistance – Base plate
[A]
40
[°C/W]
6
3.0 m/s
35
30
2.0 m/s
25
1.5 m/s
20
5
4
3
1.0 m/s
15
2
0.5 m/s
10
5
1
Na t. Con v.
0
0
0
20
40
60
80
0.0
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
1.0
1.5
2.0
2.5
3.0[m/s]
Thermal resistance vs. airspeed measured at the converter. Tested
in wind tunnel with airflow and test conditions as per the Thermal
consideration section. VI = 53 V.
Output Current Derating – Base Plate + Heat sink
[A]
40
0.5
Output Current Derating – Cold wall sealed box
A
40
3.0 m/s
35
35
30
2.0 m/s
25
1.5 m/s
25
1.0 m/s
20
20
15
30
15
0.5 m/s
10
5
Ta mb
85 °C
10
Na t. Con v.
5
0
0
0
20
40
60
80
100 [°C]
0
20
40
60
80
100 [°C]
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Thermal Consideration section.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section. Tested with Plate Fin
Transverse heatsink, height 0.23 In, P0114 Thermal Pad.
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 14 of 36
Electrical Specification
12.45 V, 35 A / 415 W
TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/014
parameter
conditions/description
min
input voltage range (VI)
typ
36
max
units
75
V
V
turn-off input voltage (VIoff)
decreasing input voltage
32
33
34
turn-on input voltage (VIon)
increasing input voltage
34
35
36
internal input capacitance (CI)
18
output power (PO)
0
V
μF
415
W
efficiency (η)
50% of max IO
max IO
50% of max IO, VI = 48 V
max IO, VI = 48 V
96.2
95.5
96.4
95.5
%
%
%
%
power dissipation (Pd)
max IO
19.5
input idling power (Pli)
IO = 0 A, VI = 53 V
input standby power (PRC)
VI = 53 V (turned off with RC)
default switching frequency (fs)
0-100% of max IO
output voltage initial setting
and accuracy (VOi)
TP1 = 25°C, VI = 53 V, IO = 0 A
output adjust range (VO)
see operating information
output voltage tolerance band
(VO)
0-100% of max IO
line regulation (VO)
max IO
load regulation (VO)
VI = 53 V, 0-100% of max IO
load transient voltage deviation
(Vtr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
±0.4
V
load transient recovery time
(ttr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
150
µs
ramp-up time (tr) - (from
10−90% of VOi)
10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V
23
ms
start-up time (ts) - (from VI
connection to 90% of VOi)
10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V
39
ms
VI shut-down fall time (tf) (from VI off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
3.6
7
ms
s
RC start-up time (tRC)
max IO
27
ms
RC shut-down fall time (tRC) (from RC off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
5.1
7
ms
s
29.5
3.2
W
0.4
140
147
kHz
12.415
12.45
12.485
V
4.0
13.2
V
11.5
12.7
V
20
55
mV
600
700
mV
0
current limit threshold (Ilim)
VO = 10.8 V, TP1, TP3 < max TP1, TP3
short circuit current (Isc)
TP1, TP3 = 25ºC, see Note 1
recommended capacitive load
(Cout)
TP1, TP3 = 25ºC, see Note 2
output ripple & noise (VOac)
W
133
500
output current (IO)
W
37
41
35
A
44
A
12
3.5
6
mF
See ripple & noise section, max IO , see Note 3
60
150
mVp-p
over voltage protection (OVP)
TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO
15.6
remote control (RC)
sink current (note 4), see operating information
trigger level, decreasing RC-voltage
trigger level, increasing RC-voltage
0.7
mA
V
V
Note
1:
2:
3:
4:
0.1
A
2.6
2.9
OCP in hic-up mode
Low ESR-value
Cout = 100 µF, external capacitance
Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 15 of 36
Typical Characteristics
12.45 V, 63 A / 747 W, two products in parallel
Efficiency
Power Dissipation
[W]
45
[%]
100
40
35
95
36 V
90
48 V
53 V
85
75 V
80
30
36 V
25
48 V
20
53 V
15
75 V
10
5
75
0
0
10
20
30
40
50
60
0
[A]
10
20
30
40
50
60
[A]
Dissipated power vs. load current and input voltage at
TP1, TP3 = +25°C
Efficiency vs. load current and input voltage at TP1, TP3 = +25 C
Output Characteristics
Current Limit Characteristics
[V]
12.5
[V]
13.0
12.4
11.0
12.3
12.2
48 V
75 V
12.0
48 V
53 V
7.0
53 V
12.1
36 V
9.0
36 V
75 V
5.0
11.9
3.0
63
11.8
0
10
20
30
40
50
60
67
69
71
73
75
77
79
81
83 [A]
[A ]
Output voltage vs. load current at TP1, TP3 = +25°C
Start-up
Start-up enabled by connecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 63 A resistive load.
65
Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C
Output Load Transient Response
Output voltage response to load current Top trace: output voltage (0.5 V/div.).
step-change (15.8-47.3-15.8 A) at:
Bottom trace: output current (20 A/div.).
TP1, TP3 =+25°C, VI = 53 V, CO = 3.5 mF. Time scale: (0.5 ms/div.).
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 16 of 36
Typical Characteristics
12.45 V, 35 A / 415 W
Output Current Derating – Open frame
[A]
35
3.0 m/s
30
2.0 m/s
25
1.5 m/s
20
15
1.0 m/s
10
0.5 m/s
5
Na t. Co nv.
0
0
20
40
60
80
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate
Thermal Resistance – Base plate
[°C/W]
[A]
35
6
3.0 m/s
30
5
2.0 m/s
25
4
1.5 m/s
20
15
1.0 m/s
10
0.5 m/s
5
3
2
1
Na t. Con v.
0
0
0
20
40
60
80
0.0
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
0.5
1.0
1.5
2.0
2.5
3.0 [m/s]
Thermal resistance vs. airspeed measured at the converter. Tested in
wind tunnel with airflow and test conditions as per the Thermal
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
A
[A]
35
30
25
20
15
10
3.0 m/s
40
35
2.0 m/s
30
1.5 m/s
25
1.0 m/s
20
15
0.5 m/s
10
Na t. Con v.
5
0
0
20
40
60
80
Ta mb
85 °C
5
0
0
100 [°C]
20
40
60
80
100 [°C]
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Thermal Consideration section.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section. Tested with Plate Fin
Transverse heatsink, height 0.23 In, P0114 Thermal Pad.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 17 of 36
Electrical Specification
12.45 V, 39 A / 462 W
TP1, TP3 = -40 to +90ºC, VI = 40 to 60 V, sense pins connected to output pins unless otherwise specified under Conditions.
Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/017
parameter
conditions/description
min
input voltage range (VI)
typ
40
max
units
60
V
turn-off input voltage (VIoff)
decreasing input voltage
36
37
38
V
turn-on input voltage (VIon)
increasing input voltage
38
39
40
V
internal input capacitance (CI)
18
output power (PO)
0
μF
462
W
efficiency (η)
50% of max IO
max IO
50% of max IO, VI = 48 V
max IO, VI = 48 V
96.7
95.7
96.8
95.6
power dissipation (Pd)
max IO
21.0
input idling power (Pli)
IO = 0 A, VI = 53 V
input standby power (PRC)
VI = 53 V (turned off with RC)
default switching frequency (fs)
0-100% of max IO
output voltage initial setting
and accuracy (VOi)
TP1 = 25°C, VI = 53 V, IO = 0 A
output adjust range (VO)
see operating information
output voltage tolerance band
(VO)
0-100% of max IO
line regulation (VO)
max IO
load regulation (VO)
VI = 53 V, 0-100% of max IO
load transient voltage deviation
(Vtr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
±0.4
V
load transient recovery time
(ttr)
VI = 53 V, load step 25-75-25% of max IO, di/dt =
1 A/μs
150
µs
ramp-up time (tr) - (from
10−90% of VOi)
10-100% of max IO, TP1 = 25ºC, VI = 53 V
23
ms
start-up time (ts) - (from VI
connection to 90% of VOi)
10-100% of max IO, TP1 = 25ºC, VI = 53 V
39
ms
VI shut-down fall time (tf) (from VI off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
3
7
ms
s
RC start-up time (tRC)
max IO
27
ms
RC shut-down fall time (tRC) (from RC off to 10% of VO)
max IO
IO = 0 A, CO = 0 mF
4.5
7
ms
s
140
147
kHz
12.415
12.45
12.485
V
4.0
13.2
V
11.5
12.7
V
31
60
mV
600
700
mV
0
VO = 10.8 V, TP1, TP3 < max TP1, TP3
TP1 = 25ºC, see Note 1
recommended capacitive load
(Cout)
TP1 = 25ºC, see Note 2
output ripple & noise (VOac)
over voltage protection (OVP)
remote control (RC)
sink current (note 4), see operating information
trigger level, decreasing RC-voltage
trigger level, increasing RC-voltage
W
133
500
short circuit current (Isc)
W
W
0.4
current limit threshold (Ilim)
1:
2:
3:
4:
30.5
2.8
output current (IO)
Note
%
%
%
%
41
44
39
A
47
A
14
0.1
A
3.9
6
mF
See ripple & noise section, max IO , see Note 3
50
110
mVp-p
TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO
15.6
2.6
2.9
OCP in hic-up mode
Low ESR-value
Cout = 100 µF, external capacitance
Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
cui.com
V
0.7
mA
V
V
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 18 of 36
Typical Characteristics
12.45 V, 70 A / 830 W, two products in parallel
Efficiency
Power Dissipation
[%]
[W]
45
100
40
35
95
40 V
90
48 V
53 V
85
60 V
80
30
40 V
25
48 V
20
53 V
15
60 V
10
5
75
0
0
10
20
30
40
50
60
0
70 [A]
10
20
30
40
50
60
70 [A]
Dissipated power vs. load current and input voltage at
TP1, TP3 = +25°C
Efficiency vs. load current and input voltage at TP1, TP3 = +25 C
Output Characteristics
Current Limit Characteristics
12.5
[V]
13.0
12.4
11.0
[V]
12.3
40 V
12.2
48 V
12.1
53 V
12.0
60 V
40 V
9.0
48 V
53 V
7.0
60 V
5.0
11.9
3.0
11.8
0
10
20
30
40
50
60
70
70 [A]
Output voltage vs. load current at TP1, TP3 = +25°C
Start-up
Start-up enabled by connecting VI at:
TP1, TP3 = +25°C, VI = 53 V,
IO = 70 A resistive load.
75
80
85
90 [A]
Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C
Output Load Transient Response
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
Output voltage response to load current Top trace: output voltage (0.5 V/div.).
step-change (17.5-52.5-17.5 A) at:
Bottom trace: output current (20 A/div.).
TP1, TP3 =+25°C, VI = 53 V, CO = 3.9 mF Time scale: (0.5 ms/div.).
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 19 of 36
Typical Characteristics
12.45 V, 39 A / 462 W
Output Current Derating – Open frame
[A]
40
35
3.0 m/s
30
2.0 m/s
25
1.5 m/s
20
1.0 m/s
15
0.5 m/s
10
Na t. Con v.
5
0
0
20
40
60
80
100
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
Output Current Derating – Base plate
Thermal Resistance – Base plate
[A]
40
[°C/W]
6
3.0 m/s
35
30
2.0 m/s
25
1.5 m/s
20
5
4
3
1.0 m/s
15
2
0.5 m/s
10
5
1
Na t. Con v.
0
0
0
20
40
60
80
0.0
100 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section.
1.0
1.5
2.0
2.5
3.0[m/s]
Thermal resistance vs. airspeed measured at the converter. Tested
in wind tunnel with airflow and test conditions as per the Thermal
consideration section. VI = 53 V.
Output Current Derating – Base Plate + Heat sink
[A]
40
0.5
Output Current Derating – Cold wall sealed box
A
40
3.0 m/s
35
35
30
2.0 m/s
25
1.5 m/s
25
1.0 m/s
20
20
15
30
15
0.5 m/s
10
5
Ta mb
85 °C
10
Na t. Con v.
5
0
0
0
20
40
60
80
100 [°C]
0
20
40
60
80
100 [°C]
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Thermal Consideration section.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Consideration section. Tested with Plate Fin
Transverse heatsink, height 0.23 In, P0114 Thermal Pad.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 20 of 36
EMC Specification
Conducted EMI measured according to EN55022, CISPR
22 and FCC part 15J (see test set-up). The fundamental
switching frequency is 140 kHz for NQB at VI = 53 V, max
IO.
Conducted EMI Input terminal value (typ)
Test set-up
Layout recommendations
The radiated EMI performance of the product will
depend on the PWB layout and ground layer design.
It is also important to consider the stand-off of
the product. If a ground layer is used, it should
be connected to the output of the product and the
equipment ground or chassis.
EMI without filter
Optional external filter for class B
Suggested external input filter in order to meet class B
in EN 55022, CISPR 22 and FCC part 15J.
0
C4
L1
C1
L2
C2
+
C3
+
Module
-
-
R
Filter components:
C1 = 1 μF
C2 = 1 μF+220 μF
C3 = 1 μF+220 μF
C4,C5 = 2.2 nF
L1 = 810 μH
L2 = 810 μH
A ground layer will increase the stray capacitance
in the PWB and improve the high frequency EMC
performance.
Output ripple and noise
Output ripple and noise measured according to figure
below.
C5
0
Output ripple and noise test setup
EMI with filter
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Operating information
Power Management Overview
This product is equipped with a PMBus interface. The
product incorporates a wide range of readable and
configurable power management features that are simple
to implement with a minimum of external components.
Additionally, the product includes protection features that
continuously safeguard the load from damage due to
unexpected system faults. A fault is also shown as an alert
on the SALERT pin. The following product parameters can
continuously be monitored by a host: Input voltage, output
voltage/current, duty cycle and internal temperature.
The product is delivered with a default configuration
suitable for a wide range operation in terms of input
voltage, output voltage, and load. The configuration is
stored in an internal Non-Volatile Memory (NVM). All
power management functions can be reconfigured using
the PMBus interface. Please contact your local CUI Power
Modules representative for design support of custom
configurations or appropriate SW tools for design and
down-load of your own configurations.
Input Voltage
The NQB consists of two different product families
designed for two different input voltage ranges, 36 to 75
Vdc and 40 to 60 Vdc, see ordering information.
The input voltage range 36 to 75 Vdc meets the
requirements of the European Telecom Standard ETS 300
132-2 for normal input voltage range in –48 and –60 Vdc
systems, -40.5 to -57.0 V and –50.0 to -72 V respectively.
At input voltages exceeding 75 V, the power loss will
be higher than at normal input voltage and TP1 must be
limited to absolute max +125°C. The absolute maximum
continuous input voltage is 80 Vdc.
The input voltage range 40 to 60 Vdc meets the
requirements for normal input voltage range in -48 V
systems, -40.5 to -57.0 V. At input voltages exceeding
60 V, the power loss will be higher than at normal input
voltage and TP1 must be limited to absolute max +125°C.
The absolute maximum continuous input voltage is 65 Vdc.
Turn-off Input Voltage
The product monitors the input voltage and will turn
on and turn off at predetermined levels. The minimum
hysteresis between turn on and turn off input voltage is
2 V. The turn on and turn off levels of the product can be
reconfigured using the PMBus interface
Remote Control (RC)
The products are fitted with a configurable remote control
function. The primary remote control is referenced to the
primary negative input connection (-In). The RC function
allows the converter to be turned on/off by an external
device like a semiconductor or mechanical switch. The RC
pin has an internal pull up resistor. The remote control
functions can also be configured using the PMBus.
date 02/20/2013 │ page 21 of 36
The device should be capable of sinking 0.7 mA. When the
RC pin is left open, the voltage generated on the RC pin is
max 6 V. The standard product is provided with “negative
logic” remote control and will be off
until the RC pin is connected to the
-In. To turn on the product the
voltage between RC pin and -In should be less than 1 V.
To turn off the product the RC pin
should be left open for a minimum
of time 150 µs, the same time
requirement applies when the product
shall turn on. In situations where it is
desired to have the product to power up automatically
without the need for control signals or a switch, the RC
pin can be wired directly to –In or disabled via the 0xE3
command. The logic option for the primary remote control is
configured via 0xE3 command using the PMBus.
Remote Control (secondary side)
The CTRL-pin can be configured as remote control via the
PMBus interface. In the default configuration the CTRLpin is disabled and floating. The output can be configured
to internal pull-up to 3.3 V using the MFR_MULTI_PIN_
CONFIG (0xF9) PMBus command. The CTRL-pin can be left
open when not used. The logic options for the secondary
remote control can be positive or negative logic. The logic
option for the secondary remote control is configured
via ON_OFF_CONFIG (0x02) command using the PMBus
interface, see also MFR_MULTI_PIN_CONFIG section.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the product. It is important
that the input source has low characteristic impedance.
Minimum recommended external input capacitance is 100
µF. The performance in some applications can be enhanced
by addition of external capacitance as described under
External Decoupling Capacitors.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load
can be improved by addition of decoupling capacitors at
the load. The most effective technique is to locate low ESR
ceramic and electrolytic capacitors as close to the load
as possible, using several parallel capacitors to lower the
effective ESR. The ceramic capacitors will handle highfrequency dynamic load changes while the electrolytic
capacitors are used to handle low frequency dynamic load
changes. Ceramic capacitors will also reduce any high
frequency noise at the load. It is equally important to
use low resistance and low inductance PWB layouts and
cabling. External decoupling capacitors will become part
of the product’s control loop. The control loop is optimized
for a wide range of external capacitance and the maximum
recommended value that could be used without any
additional analysis is found in the electrical specification.
The ESR of the capacitors is a very important parameter.
Stable operation is guaranteed with a verified ESR value of
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
>10 mΩ across the output connections.
For further information please contact your local CUI Power
Modules representative.
Parallel Operation (Droop Load Share, DLS)
The NQB, DLS products are variants that can be connected
in parallel. 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 droop 0.6 V while load reaches
max load. This feature allows the products to be connected
in parallel and share the current with 10% accuracy. Up
to 90% of max output current can be used from each
product.
When running DLS-products in parallel command (0xF9)
must be set according to MFR_MULTI_PIN_CONFIG. To
prevent unnecessary current stress, changes of the output
voltage must be done with the output disabled. This must
be considered for all commands that affect the output
voltage.
Voltage regulation DLS products
Output Voltage [V]
12.8
Module 1
12.6
Module 2
Module 1+2
12.4
12.2
12.0
11.8
11.6
0
10
20
30
40
50
60
70
Output Current [A]
Feed Forward Capability
The NQB products have a feed forward function
implemented that can handle sudden input voltage
changes. The output voltage will be regulated during an
input transient and will typically stay within 10% when an
input transient is applied.
PMBus configuration and support
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 your local CUI Power Modules
representative for appropriate SW tools to down-load new
configurations.
Output Voltage Adjust using PMBus
The output voltage of the product can be reconfigured
using the PMBus interface.
date 02/20/2013 │ page 22 of 36
Margin Up/Down Controls
These controls allow the output voltage to be momentarily
adjusted, either up or down, by a nominal 10%. This
provides a convenient method for dynamically testing
the operation of the load circuit over its supply margin or
range. It can also be used to verify the function of supply
voltage supervisors.
The margin up and down levels of the product can be reconfigured using the PMBus interface.
Soft-start Power Up
The default rise time of the ramp up is 10 ms. When
starting by applying input voltage the control circuit bootup time adds an additional 15 ms delay. The soft-start
power up of the product can be reconfigured using the
PMBus interface.
The DLS variants have a pre-configured ramp up time of
25 ms.
Remote Sense
The product has remote sense that can be used to
compensate for voltage drops between the output and the
point of load. The sense traces should be located close
to the PWB ground layer to reduce noise susceptibility.
The remote sense circuitry will compensate for up to
10% voltage drop between output pins and the point of
load. If the remote sense is not needed +Sense should
be connected to +Out and -Sense should be connected to
-Out. To be able to use remote sense the converter must
be equipped with a Communication interface.
Temperature Protection (OTP, UTP)
The products are protected from thermal overload by an
internal temperature shutdown protection. When TP1 as
defined in thermal consideration section is exceeded the
product will shut down. The product will make continuous
attempts to start up (non-latching mode) and resume
normal operation automatically when the temperature
has dropped below the temperature threshold set in the
command OT_WARN_LIMIT (0x51); the hysteresis is
defined in general electrical specification. The OTP and
hysteresis of the product can be re-configured using
the PMBus interface. The product has also an under
temperature protection. The OTP and UTP fault limit and
fault response can be configured via the PMBus. Note:
using the fault response “continue without interruption”
may cause permanent damage to the product
Over Voltage Protection (OVP)
The product includes over voltage limiting circuitry for
protection of the load. The default OVP limit is 30% above
the nominal output voltage. If the output voltage exceeds
the OVP limit, the product 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.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Synchronization, Tracking and External reference
This product does not support synchronization, tracking or
external reference.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
Stand alone, Power Good Push-pull,
Sec RC w/ pull up/down (0x05)
Stand alone, Power Good High Z when
active, PMBus Control (0x24)
Stand alone, Power Good High Z when
active, Sec RC w/ pull up/down (0x25)
Power Good
The product 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. If specified in section Connections, the product
also provides a PG signal output. The Power Good signal
is by default configured as active low, Push-pull and can
be re-configured via the PMBus interface. The Power Good
output can be configured as Push-pull or “High Z when
active” to permit AND’ing of parallel devices. It is not
recommended to use Push-pull when paralleling PG-pins,
see MFR_MULTI_PIN_CONFIG.
1
Stand alone, Power Good Push-pull, PMBus
Control (0x04)
1) When not used
with PMBus, the
CTRL input can be
internally pulled up
or down depending
on if it is active high
or low. When active
low it will be pulled
up and vice versa
1
Stand alone, PMBus Control (0x00)
Pre-bias Start-up Capability
The product has a Pre-bias start up functionality and will
not sink current during start up if a Pre-bias source is
present at the output terminals. If the Pre-bias voltage
is lower than the target value set in VOUT_COMMAND
(0x21), the product will ramp up to the target value. If
the Pre-bias voltage is higher than the target value set in
VOUT_COMMAND (0x21), the product will ramp down to
the target value and in this case sink current for a limited
of time set in the command TOFF_MAX_WARN_LIMIT
(0x66).
1
Stand alone, Sec RC w/ pull up/down (0x01)
Input Over/Under voltage protection
The input of the product can be protected from high input
voltage and low input voltage. The over/under-voltage
fault level and fault response can be configured via the
PMBus interface.
1
DLS, Power Good High Z when active,
Sec RC w/ pull up/down (0xA7)
Bit 5
Power Good High Z
when active
Bit 4
Tracking enable
(N/A)
Bit 3
External reference
(N/A)
Bit 2
Power Good
Enable
Bit 1
Reserved
Bit 0
Secondary Remote
Control Pull
up/down resistor
enable 1)
1
DLS, Power Good High Z when active,
PMBus Control (0xA6)
The over current protection of the product can be
reconfigured using the PMBus interface.
1
DLS, Power Good Push-pull,
Sec RC w/ pull up/down (0x87)
Bit 7:6
00 = Stand alone
01 = Slave (N/A)
10 = DLS
11 = Master (N/A)
DLS, Power Good Push-pull, PMBus Control
(0x86)
MFR_MULTI_PIN_CONFIG
The MFR_MULTI_PIN_CONFIG (0xF9) command enables
or disables different functions inside the product. This
command can be configured according to the table for
different functions.
DLS, PMBus Control (0x82)
Droop Load Share variants (DLS) will enter hic-up mode,
with a trip voltage, 0.04×Vout, set in command IOUT_
OC_LV_FAULT_LIMIT (0x48). Above the trip voltage in
command (0x48) the product will continue operate while
maintaining the output current at the value set by IOUT_
OC_FAULT_LIMIT (0x46).
Switching frequency adjust using PMBus
The switching frequency is set to 140 kHz as default but
this can be reconfigured via the PMBus interface. The
product is optimized at this frequency but can run at
lower and higher frequency, (125-150 kHz). The electrical
performance can be affected if the switching frequency is
changed.
DLS, Sec RC w/ pull up/down (0x83)
Over Current Protection (OCP)
The product includes current limiting circuitry for
protection at continuous overload. The default setting for
the product is hic-up mode if the maximum output current
is exceeded and the output voltage is below 0.3×Vout, set
in command IOUT_OC_LV_FAULT_LIMIT (0x48). Above
the trip voltage value in command 0x48 the product will
continue operate while maintaining the output current at
the value set by IOUT_OC_FAULT_LIMIT (0x46). The load
distribution should be designed for the maximum output
short circuit current specified.
date 02/20/2013 │ page 23 of 36
The MFR_MULTI_PIN_CONFIG can be reconfigured using
the PMBus interface. Default configuration is set to Power
Good Push-Pull (0x04) for stand alone variants and DLS
Power Good Push-Pull (0x86) for Droop Load Share
variants.
User customized settings
This product has two data storage set: Default data (CUI
factory) and User data. The User data set’s priority is
higher than the Default data. The User data area is empty
while shipped to customer. After boot-up, if the controller
found no data stored in User data area, it will load Default
data instead.
Customer can change the RAM data and store the changes
into flash memory by PMBUS Store_User_All, next power
cycle will load the User data into RAM for execute.
Store_Default_All is write protected to ensure the factory
settings is always available for recovery.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
13.4
13.4
13.2
13.2
13.0
13.0
12.8
12.8
Vout [V]
Vout [V]
Output Voltage Regulation
The NQB products are designed to be fully regulated
within the plotted area. Operating outside this area is not
recommended.
12.6
12.4
12.2
date 02/20/2013 │ page 24 of 36
are found in the output section for each model. The
product is tested in a sealed box test set up with ambient
temperatures 85, 55 and 25°C.
12.6
12.4
12.2
12.0
12.0
35
45
55
65
75
Vin [V]
Vin range: 36-75Vdc
35 40
45 50 55
60 65
Vin [V]
Vin range:40-60Vdc
Thermal Consideration
General
The product is designed to operate in different thermal
environments and sufficient cooling must be provided
to ensure reliable operation. For products mounted on
a PWB without a heat sink attached, cooling is achieved
mainly by conduction, from the pins to the host board,
and convection, which is dependant on the airflow across
the product. Increased airflow enhances the cooling of
the product. The Output Current Derating graph found in
the output section for each model provides the available
output current vs. ambient air temperature and air velocity
at VI =53 V.
The product is tested on a 254 x 254 mm, 35 µm (1 oz),
16-layer test board mounted vertically in a wind tunnel
with a cross-section of 608 x 203 mm.
Definition of product operating temperature
The product operating temperature is used to monitor the
temperature of the product, and proper thermal conditions
can be verified by measuring the temperature at positions
P1, P2, P3 and P4. The temperature at these positions (TP1,
TP2, TP3, TP4) should not exceed the maximum temperatures
in the table below. The number of measurement points
may vary with different thermal design and topology.
Temperatures above maximum TP1, measured at the
reference point P1 (TP3 / P3 for base plate versions) are not
allowed and may cause permanent damage.
Position
Description
P1
PWB (reference point, open
TP1=125º C
frame)
P2
Opto-coupler
TP2=105º C
P3
PWB (reference point for
base-plate version)
TP3=125º C
P4
Primary MOSFET
TP4=125º C
For products with base plate used in a sealed box/cold
wall application, cooling is achieved mainly by conduction
through the cold wall. The Output Current Derating graphs
cui.com
Max temperature
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 25 of 36
Connections (Top view)
Top view
Pin
Designation
Function
1
+In
Positive Input
2
RC
Remote Control
3
Case
Case to GND (optional)
4
-In
Negative Input
5
-Out
Negative Output
6
S+
Positive Remote Sense
7
S-
Negative Remote Sense
Bottom view
8
SA0
Address pin 0
(Best air flow direction is from positive to negative pins.)
9
SA1
Address pin 1
10
SCL
PMBus Clock
11
SDA
PMBus Data
12
PG
Power Good output
13
DGND
PMBus ground
14
SALERT
PMBus alert signal
15
CTRL
PMBus remote control
16
+Out
Positive Output
Ambient Temperature Calculation
For products with base plate the maximum allowed
ambient temperature can be calculated by using the
thermal resistance.
1. The power loss is calculated by using the formula
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of product. E.g. 95 % = 0.95
2. Find the thermal resistance (Rth) in the Thermal
Resistance graph found in the Output section for
each model. Note that the thermal resistance can be
significantly reduced if a heat sink is mounted on the top
of the base plate.
Calculate the temperature increase (ΔT).
ΔT = Rth x Pd
3. Max allowed ambient temperature is:
Max TP1 - ΔT.
E.g. NQB-468 at 2m/s:
1. ((1/0.95) - 1) × 468 W = 24.6 W
2. 19.5 W × 2.8°C/W = 69.0°C}
3. 125 °C - 69.0°C = max ambient temperature is 56°C
The actual temperature will be dependent on several
factors such as the PWB size, number of layers and
direction of airflow.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 26 of 36
PMBus Interface
This product provides a PMBus digital interface that
enables the user to configure many aspects of the device
operation as well as to monitor the input and output
voltages, output current and device temperature. The
product can be used with any standard two-wire I2C or
SMBus host device. In addition, the product is compatible
with PMBus version 1.2 and includes an SALERT line to
help mitigate bandwidth limitations related to continuous
fault monitoring. The product supports 100 kHz and 400
kHz bus clock frequency only. The PMBus signals, SCL,
SDA and SALERT require passive pull-up resistors as
stated in the SMBus Specification. Pull-up resistors are
required to guarantee the rise time as follows:
Eq. 7
Schematic of connection of address resistors.
SA0/SA1 Index
0
τ = R P C p ≤ 1us
where Rp is the pull-up resistor value and Cp is the bus
load. The maximum allowed bus load is 400 pF. The pullup resistor should be tied to an external supply between
2.7 to 5.5 V, which should be present prior to or during
power-up. If the proper power supply is not available,
voltage dividers may be applied. Note that in this case, the
resistance in the equation above corresponds to parallel
connection of the resistors forming the voltage divider.
It is recommended to always use PEC (Packet Error Check)
when communicating via PMBus. For these products it is
a requirement to use PEC when using Send Byte to the
device, for example command “RESTORE_DEFAULT_ALL”.
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
SALERT 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:
•
10
1
22
2
33
3
47
4
68
5
100
6
150
7
220
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)
If the calculated PMBus address is 0, 11 or 12, PMBus
address 127 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.
Monitoring via PMBus
•
•
•
•
•
RSA0/RSA1 [kΩ]
I2C/SMBus - Timing
Input voltage
Output voltage
Output current
Internal junction temperature
Switching frequency (Monitors the set value not
actual frequency)
Duty cycle
Setup and hold times timing diagram
Software Tools for Design and Production
For these products CUI provides software for configuring
and monitoring via the PMBus interface.
For more information please contact your local
CUI sales representative.
PMBus Addressing
The following figure and table show recommended resistor
values with min and max voltage range for hard-wiring
PMBus addresses (series E12, 1% tolerance resistors
suggested):
The setup time, tset, is the time data, SDA, must be stable
before the rising edge of the clock signal, SCL. The hold
time thold, is the time data, SDA, must be stable after
the rising edge of the clock signal, SCL. If these times are
violated incorrect data may be captured or meta-stability
may occur and the bus communication may fail. When
configuring the product, all standard SMBus protocols
must be followed, including clock stretching. Additionally,
a bus-free time delay between every SMBus transmission
(between every stop & start condition) must occur. Refer
to the SMBus specification, for SMBus electrical and timing
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
requirements. Note that an additional delay of 5 ms has
to be inserted in case of storing the RAM content into the
internal non-volatile memory.
PMBus Commands
The products are PMBus compliant. The following table
lists 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.
Designation
Cmd
Prot
Designation
date 02/20/2013 │ page 27 of 36
Cmd
Prot
IOUT_OC_FAULT_RESPONSE
47h
No
IOUT_OC_LV_FAULT_LIMIT
48h
No
IOUT_OC_WARN_LIMIT
4Ah
No
OT_FAULT_LIMIT
4Fh
No
OT_FAULT_RESPONSE
50h
No
OT_WARN_LIMIT
51h
No
UT_WARN_LIMIT
52h
No
UT_FAULT_LIMIT
53h
No
UT_FAULT_RESPONSE
54h
No
VIN_OV_FAULT_LIMIT
55h
No
VIN_OV_FAULT_RESPONSE
56h
No
VIN_OV_WARN_LIMIT
57h
No
Standard PMBus Commands
VIN_UV_WARN_LIMIT
58h
No
Control Commands
VIN_UV_FAULT_LIMIT
59h
No
OPERATION
01h
No
VIN_UV_FAULT_RESPONSE
5Ah
No
ON_OFF_CONFIG
02h
No
POWER_GOOD_ON
5Eh
No
WRITE_PROTECT
10h
No
POWER_GOOD_OFF
5Fh
No
Output Commands
Time setting Commands
VOUT_MODE
20h
No
TON_DELAY
60h
No
VOUT_COMMAND
21h
No
TON_RISE
61h
No
VOUT_TRIM
22h
No
TON_MAX_FAULT_LIMIT
62h
No
VOUT_CAL_OFFSET
23h
Yes
TON_MAX_FAULT_RESPONSE
63h
No
VOUT_MAX
24h
No
TOFF_DELAY
64h
No
VOUT_MARGIN_HIGH
25h
No
TOFF_FALL
65h
No
VOUT_MARGIN_LOW
26h
No
TOFF_MAX_WARN_LIMIT
66h
No
VOUT_TRANSITION_RATE
27h
No
Status Commands (Read Only)
VOUT_SCALE_LOOP
29h
Yes
CLEAR_FAULTS
03h
No
VOUT_SCALE_MONITOR
2Ah
Yes
STATUS_BYTES
78h
No
MAX_DUTY
32h
No
STATUS_WORD
79h
No
FREQUENCY_SWITCH
33h
No
STATUS_VOUT
7Ah
No
VIN_ON
35h
No
STATUS_IOUT
7Bh
No
7Ch
No
VIN_OFF
36h
No
STATUS_INPUT
IOUT_CAL_GAIN
38h
Yes
STATUS_TEMPERATURE
7Dh
No
IOUT_CAL_OFFSET
39h
Yes
STATUS_CML
7Eh
No
STATUS_OTHER
7Fh
No
40h
No
Monitior Commands (Read Only)
Fault Commands
VOUT_OV_FAULT_LIMIT
VOUT_OV_FAULT_RESPONSE
41h
No
READ_VIN
88h
No
VOUT_OV_WARN_LIMIT
42h
No
READ_VOUT
8Bh
No
VOUT_UV_WARN_LIMIT
43h
No
READ_IOUT
8Ch
No
VOUT_UV_FAULT_LIMIT
44h
No
READ_TEMPERATURE_1
8Dh
No
VOUT_UV_FAULT_RESPONSE
45h
No
READ_TEMPERATURE_2
8Eh
No
IOUT_OC_FAULT_LIMIT
46h
No
READ_DUTY_CYCLE
94h
No
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Designation
Cmd
Prot
READ_FREQUENCY
95h
No
%K
1R
PMBUS_REVISION
98h
No
MFR_ID
99h
Yes
MFR_MODEL
9Ah
Yes
Configuration and Control Commands
86(5 '$7$ Identification Commands (Read Only)
MFR_REVISION
9Bh
Yes
MFR_LOCATION
9Ch
Yes
MFR_DATE
9Dh
Yes
MFR_SERIAL
9Eh
Yes
STORE_DEFAULT_ALL
11h
Yes
RESTORE_DEFAULT_ALL
12h
No
STORE_USER_ALL
15h
No
RESTORE_USER_ALL
16h
No
CAPABILITY
19h
No
Product Specific Commands
MFR_POWER_GOOD_POLARITY
D0h
No
MFR_VIN_SCALE_MONITOR
D3h
Yes
MFR_SELECT_TEMP_SENSOR
DCh
No
MFR_VIN_OFFSET
DDh
Yes
Supervisory Commands
MFR_VOUT_OFFSET_MONITOR
DEh
Yes
MFR_TEMP_OFFSET_INT
E1h
No
MFR_REMOTE_TEMP_CAL
E2h
No
MFR_REMOTE_CTRL
E3h
No
MFR_DEAD_BAND_DELAY
E5h
Yes
MFR_TEMP_COEFF
E7h
Yes
MFR_DEBUG_BUFF
F0h
No
MFR_SETUP_PASSWORD
F1h
No
MFR_DISABLE_SECURITY_ONCE
F2h
No
MFR_DEAD_BAND_IOUT_THRESHOLD
F3h
Yes
MFR_SECURITY_BIT_MASK
F4h
Yes
MFR_PRIMARY_TURN
F5h
Yes
MFR_SECONDARY_TURN
MFR_ILIM_SOFTSTART
F6h
F8h
Yes
No
MFR_MULTI_PIN_CONFIG
F9h
No
MFR_DEAD_BAND_VIN_THRESHOLD
FAh
Yes
MFR_DEAD_BAND_VIN_IOUT_HYS
FBh
Yes
MFR_RESTART
FEh
No
Note:
1. Cmd, is short for Command.
2. Prot, is short for commands that are protected with security mask.
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date 02/20/2013 │ page 28 of 36
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Mechanical Information - Hole Mount, Open Frame Version
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date 02/20/2013 │ page 29 of 36
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Mechanical Information - Hole Mount, Base Plate Version
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date 02/20/2013 │ page 30 of 36
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Mechanical Information - Surface Mount Version
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date 02/20/2013 │ page 31 of 36
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 32 of 36
Soldering Information - Surface Mounting
Lead-free (Pb-free) solder processes
The surface mount product is intended for forced
convection or vapor phase reflow soldering in SnPb and
Pb-free processes.
For Pb-free solder processes, a pin temperature (TPIN)
in excess of the solder melting temperature (TL, 217 to
221°C for SnAgCu solder alloys) for more than 60 seconds
and a peak temperature of 245°C on all solder joints is
recommended to ensure a reliable solder joint.
The reflow profile should be optimised to avoid excessive
heating of the product. It is recommended to have
a sufficiently extended preheat time to ensure an
even temperature across the host PWB and it is also
recommended to minimize the time in reflow.
Maximum Product Temperature Requirements
Top of the product PWB near pin 2 is chosen as reference
location for the maximum (peak) allowed product
temperature (TPRODUCT) since this will likely be the warmest
part of the product during the reflow process.
A no-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside the product or between
the product and the host board, since cleaning residues
may affect long time reliability and isolation voltage.
SnPb solder processes
For SnPb solder processes, the product is qualified for MSL
1 according to IPC/JEDEC standard J STD 020C.
During reflow TPRODUCT must not exceed 225 °C at any time.
General reflow process specifications SnPb eutectic Pb-free
Average ramp-up (T PRODUCT )
Typical solder melting (liquidus)
temperature
TL
Minimum reflow time above T L
3°C/s max
3°C/s max
183°C
221°C
60 s
60 s
Minimum pin temperature
T PIN
210°C
235°C
Peak product temperature
T PRODUCT
225°C
260°C
Average ramp-down (T PRODUCT )
6°C/s max
6°C/s max
Maximum time 25°C to peak
6 minutes
8 minutes
Pb-free solder processes
For Pb-free solder processes, the product is qualified for
MSL 3 according to IPC/JEDEC standard J-STD-020C.
During reflow TPRODUCT must not exceed 260 °C at any time.
Dry Pack Information
Products intended for Pb-free reflow soldering processes
are delivered in standard moisture barrier bags according
to IPC/JEDEC standard J STD 033 (Handling, packing,
shipping and use of moisture/reflow sensitivity surface
mount devices).
Temperature
TPRODUCT maximum
TPIN minimum
Pin
profile
TL
Time in preheat
/ soak zone
Time 25°C to peak
Time in
reflow
Product
profile
Using products in high temperature Pb-free soldering
processes requires dry pack storage and handling. In
case the products have been stored in an uncontrolled
environment and no longer can be considered dry, the
modules must be baked according to J STD 033.
Time
Thermocoupler Attachment
Minimum Pin Temperature Recommendations
Pin number 5 chosen as reference location for the
minimum pin temperature recommendation since this will
likely be the coolest solder joint during the reflow process.
Top of PWB near pin 2 for measurement of maximum
product temperature, TPRODUCT
SnPb solder processes
For SnPb solder processes, a pin temperature (TPIN) in
excess of the solder melting temperature, (TL, 183°C
for Sn63Pb37) for more than 60 seconds and a peak
temperature of 220°C is recommended to ensure a reliable
solder joint.
For dry packed products only: depending on the type of
solder paste and flux system used on the host board, up to
a recommended maximum temperature of 245°C could be
used, if the products are kept in a controlled environment
(dry pack handling and storage) prior to assembly.
Pin 5 for measurement of minimum pin (solder joint )
temperature, TPIN
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CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 33 of 36
Soldering Information - Hole Mounting
The hole mounted product is intended for plated through
hole mounting by wave or manual soldering. The pin
temperature is specified to maximum to 270°C for
maximum 10 seconds.
A maximum preheat rate of 4°C/s and maximum preheat
temperature of 150°C is suggested. When soldering by
hand, care should be taken to avoid direct contact between
the hot soldering iron tip and the pins for more than a few
seconds in order to prevent overheating.
A no-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside the product or between
the product and the host board. The cleaning residues may
affect long time reliability and isolation voltage.
Delivery Package Information
The products are delivered in antistatic injection molded
trays (Jedec design guide 4.10D standard) and in antistatic
trays.
Tray Specifications – SMD
Material
Antistatic PPE
Surface resistance
Tray thickness
105 < Ohm/square < 1012
The trays can be baked at maximum
125°C for 48 hours
14.50 mm 0.571 [ inch]
Box capacity
20 products (2 full trays/box)
Tray weight
125 g empty, 574 g full tray
Bakability
JEDEC standard tray for 2x5 = 10 products.
All dimensions in mm [inch]
Tolerances: X.x ±0.26 [0.01], X.xx ±0.13 [0.005]
Note: pick up positions refer to center of pocket.
See mechanical drawing for exact location on product.
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Tray Specifications - TH
Material
PE Foam
Surface
105 < Ohm/square < 1012
resistance
Bakability
The trays are not bakeable
Tray capacity
20 converters/tray
Box capacity
20 products (1 full tray/box)
Product – Open frame
1100 g full tray, 140g empty tray
Weight
Product – Base plate option
1480 g full tray, 140 g empty tray
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date 02/20/2013 │ page 34 of 36
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 35 of 36
Product Qualification Specification
Characteristics
External visual inspection
IPC-A-610
Change of temperature
(Temperature cycling)
IEC 60068-2-14 Na
Temperature range
Number of cycles
Dwell/transfer time
-40 to 100°C
500
15 min/0-1 min
Cold (in operation)
IEC 60068-2-1 Ad
Temperature T A
Duration
-45°C
72 h
Damp heat
IEC 60068-2-67 Cy
Temperature
Humidity
Duration
85°C
85 % RH
1000 hours
Dry heat
IEC 60068-2-2 Bd
Temperature
Duration
125°C
1000 h
Electrostatic discharge
susceptibility
IEC 61340-3-1, JESD 22-A114
IEC 61340-3-2, JESD 22-A115
Human body model (HBM)
Machine Model (MM)
Class 2, 2000 V
Class 3, 200 V
Immersion in cleaning solvents
IEC 60068-2-45 XA, method 2
Water
Glycol ether
Isopropyl alcohol
55°C
35°C
35°C
Mechanical shock
IEC 60068-2-27 Ea
Peak acceleration
Duration
100 g
6 ms
Moisture reflow sensitivity 1
J-STD-020C
Level 1 (SnPb-eutectic)
Level 3 (Pb Free)
225°C
260°C
MIL-STD-202G, method 108A
Duration
1000 h
IEC 60068-2-20 Tb, method 1A
Solder temperature
Duration
270°C
10-13 s
IEC 60068-2-21 Test Ua1
IEC 60068-2-21 Test Ue1
Through hole mount products
Surface mount products
All leads
All leads
Preconditioning
Temperature, SnPb Eutectic
Temperature, Pb-free
150°C dry bake 16 h
215°C
235°C
Preconditioning
Temperature, SnPb Eutectic
Temperature, Pb-free
Steam ageing
235°C
245°C
Frequency
Spectral density
Duration
10 to 500 Hz
0.07 g2/Hz
10 min in each direction
Operational life test
Resistance to soldering heat
2
Robustness of terminations
IEC 60068-2-58 test Td
1
Solderability
IEC 60068-2-20 test Ta 2
Vibration, broad band random
Notes:
IEC 60068-2-64 Fh, method 1
1. Only for products intended for reflow soldering (surface mount products)
2. Only for products intended for wave soldering (plated through hole products)
cui.com
CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 36 of 36
REVISION HISTORY
rev.
1.0
description
date
initial release
02/20/2013
The revision history provided is for informational purposes only and is believed to be accurate.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
[email protected]
Novum is a trademark of CUI.
PMBus is a trademark of SMIF, Inc.
All other trademarks are the property of their respective owners.
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical
component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to
affect its safety or effectiveness.