40W

Technical
S pecification
DQ65033QKA04
48V in
5.0/3.3V
40 Watt
2000Vdc
Quar ter-brick
Input
Outputs
Power
Isolation
DC/DC Conver ter
The DQ65033QKA04 DualQor ™ Kilo series is a dual out put converter that uses the industry standard quarter brick
package size. The very high efficiency is a result of
SynQor’s patented topology that uses synchronous rectifica tion and an innovative construction design to minimize heat
dissipation and allow extremely high power densities. The
power dissipated by the converter is so low that a heatsink
is not required, which saves cost, weight, height, and appli cation effort. All of the power and control components are
mounted to the multi-llayer PCB substrate with high-yyield sur face mount technology, resulting in a more reliable product.
The Kilo series offers ample power output in an economini cal package.
Dual Output
DQ65033QKA04 Module
Operational Features
• High efficiency, 90% at full rated load current
• Delivers up to 40 Watts of output power with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
Mechanical Features
• Industry standard pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height less than 0.43” (10.9mm), permits better
airflow and smaller card pitch
• Total weight: 1.5 oz. (43 g)
• Flanged pins designed to permit surface mount soldering (avoid wave solder) using FPiP technique
Contr ol Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Output voltage trim: +10%/-10%, permits custom voltages and voltage margining
Product # DQ65033QKA04
Phone 1-888-567-9596
www.synqor.com
Pr otection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter and load from permanent damage and consequent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Safety Features
• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950 recognized (US & Canada), basic insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flammability requirements
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 1
Technical Specification
MECHANICAL
DIAGRAM
35-75V
5.0V & 3.3V
40W
Quarter-brick
Input:
Outputs:
Current:
Package:
2.30
(58.4)
0.475
(12.07)
0.38
2.00
(9.7)
0.14
0.225
(50.8)
(5.71)
(3.6)
0.025
(.64)
0.700
0.725
Top View
(17.78)
(18.41)
1.45
(36.8)
0.350
(8.89)
Side View
Bottom side
Clearance
See Note 8
0.43
0.060+/-0.030
(1.52+/-0.76)
Lowest
Component
(10.9)
Flanged Pin
See Note 9
Load Board
0.145
(3.68)
See Note 2
NOTES
PIN DESIGNATIONS
1) All pins are 0.040” (1.02mm) diameter with 0.080”
(2.03 mm) diameter standoff shoulders.
2) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
3) All Pins: Material - Copper Alloy
Finish - Tin/Lead over Nickel plate
4) Undimensioned components are shown for visual reference
only.
5) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
6) Weight: 1.5 oz. (43 g) typical
7) Workmanship: Meets or exceeds IPC-A-610C Class II
8) UL/TUV standards require a clearance greater than 0.04”
Pin No.
Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
3
Vin(-)
Negative input voltage
4
3.3Vout(+)
3.3V positive output voltage
5
OP RTN
Output Return
6
TRIM
Output voltage trim
7
5.0Vout(+)
5.0V positive output voltage
(1.02mm) between input and output for Basic insulation. This issue
should be considered if any copper traces are on the top side of
the user’s board. Note that the ferrite cores are considered part of
the input/primary circuit.
9) The flanged pins are designed to permit surface mount
soldering (avoiding the wave soldering process) through
the use of the flanged pin-in-paste technique.
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 2
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
DQ65033QKA04 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units
100
80
100
2000
100
125
18
V
V
V
V
°C
°C
V
Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
-40
-55
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (C\L)
Recommended External Input Capacitance
35
48
75
V
32
28.5
2.5
33
29.5
3.5
34
30.5
4.5
1.7
V
V
V
A
mA
mA
A 2s
mA
mA
A
µF\µH
µF
50
2.0
100
2.0\4.7
47
OUTPUT CHARACTERISTICS
Output Voltage Set Point (3.3V)
Output Voltage Set Point (5.0V)
Total Output Voltage Regulation (3.3V)
Total Output Voltage Regulation (5.0V)
Output Voltage Ripple and Noise (3.3V & 5.0V)1
Peak-to-Peak
RMS
Operating Output Current Range (3.3V)
Operating Output Current Range (5.0V)
Output DC Current-Limit Inception (3.3V)
Output DC Current-Limit Inception (5.0V)
Short-Circuit Protection - redundant shutdown (3.3V)
Short-Circuit Protection - redundant shutdown (5.0V)
Output DC Current-Limit Shutdown Voltage (3.3\5.0V)
Back-Drive Current Limit while Enabled (3.3V only)
Back-Drive Current Limit while Disabled (3.3V only)
Maximum Output Capacitance (3.3V) - 50/50 split
Maximum Output Capacitance (5.0V) - 50/50 split
3.20
4.80
0
0
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection (3.3\5.0V)
Output Voltage during Load Current Transient
For a Step Change in 3.3V Output Current (.1A/µs)
For a Step Change in 5.0V Output Current (.1A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
180
EFFICIENCY
100% Load (40W)
50% Load (20W)
3.30
5.00
50
10
15.0
10.0
25
20
2.5\4.0
1.3
0.01
0.01
20
20
3.40
5.20
100
20
12
8
13,600
6,800
p-p thru 10µH inductor; Figures 23 & 25
RMS; Figures 23 & 24
fast blow external fuse recommended
internal values, see Figure E
Typical ESR 0.1-0.2Ω, see Figure 23
48Vin, 50% load on each voltage
48Vin, 50% load on each voltage
cross regulation, line, load, temp; Figures 7-10
cross regulation, line, load, temp; Figures 7-10
20MHz bandwidth; Figures 23 & 26
Full Load, see Figures 23 & 26
Full Load, see Figures 23 & 26
Subject to thermal derating; Figures 11-18
Subject to thermal derating; Figures 11-18
Output Voltage 10% Low; Figures 27-28
Output Voltage 10% Low; Figures 27-28
Figures 29-30
Figures 29-30
Negative current drawn from output
Negative current drawn from output
35W load; 5% overshoot at Vout at startup
35W load; 5% overshoot at Vout at startup
dB
120 Hz; Figures 33-34
200
200
400
mV
mV
µs
50% to 75% to 50% Iout max; Figure 21
50% to 75% to 50% Iout max; Figure 22
to within 1% Vout nom
ms
ms
%
Full load, Vout=90% nom.; Figures 19 & 20
-40°C to +125°C; Figure F
10mF load capacitance, Iout = 0A
%
%
48Vin, 50% load each Vout; Figures 1 - 6
48Vin, 25% load each Vout; Figures 1 - 6
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 165°C
See Figures 11 - 18 for derating curves
4
200
5
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance2
mV
mV
A
A
A
A
A
A
V
A
A
µF
µF
100% Load, 35 Vin
80\80
8
240
90.0
90.0
ISOLATION CHARACTERISTICS
V
V
V
V
continuous
continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
125
125
125
2000
30
470
V
MΩ
pF
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 3
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Regulation Stage Switching Frequency
Isolation Stage Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Over-Voltage Protection (3.3V)
Output Over-Voltage Protection (5.0V)
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor (5.0V rail)
Min.
Typ.
Max.
Units
205
215
107.5
225
kHz
kHz
-2
2.4
0.8
18
V
V
2.4
-2
18
0.8
V
V
9.2
V
kΩ
%
V
V
°C
°C
-10
4.0
6.1
117
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
40
4.1
6.2
122
10
231
+10
4.2
6.3
127
Notes & Conditions
Figures A, B
Trim-up pins 6-5, Trim-down pins 6-4; Figure C
Over full temp range
Over full temp range
Average PCB Temperature
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. See website for latest values
6
TBD
2.5
STANDARDS COMPLIANCE
Parameter P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950
EN60950
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact factory for official product family qualification document.
OPTIONS
PATENTS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
last page of this specification sheet for information on available
options.
SynQor is protected under various patents, including but not limited to U.S. Patent numbers 5,999,417; 6,222,742 B1;
6,594,159 B2; 6,545,890 B2.
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 4
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
100
5
95
Power Dissipation (W)
Efficiency (%)
90
85
80
75
70
35 Vin
48 Vin
75 Vin
65
4
8
12
16
20
24
28
32
3
2
35 Vin
1
48 Vin
75 Vin
0
60
0
4
36
0
40
4
8
12
Total Output Power (W)
Figure 1: Efficiency vs. output power, from 0 load to full load with 50%
load on 3.3V output and 50% load on 5.0V output at minimum, nominal,
and maximum input voltage at 25°C.
24
28
32
36
40
5.0
4.5
Power Dissipation (W)
95
90
Efficiency (%)
20
Figure 2: Power dissipation vs. output power, from 0 load to full load
with 50% load on 3.3V output and 50% load on 5.0V output at minimum, nominal, and maximum input voltage at 25°C.
100
85
80
75
35 Vin
48 Vin
70
5.8/1
4.4/1.9
2.9/2.9
3.5
3.0
2.5
2.0
1.5
35 Vin
1.0
0.0
7.3/0
65
7.3/0
4.0
48 Vin
0.5
75 Vin
1.5/3.9
0/4.8
75 Vin
5.8/1
4.4/1.9
2.9/2.9
1.5/3.9
0/4.8
Load Current (A), 3.3Vout/5.0Vout
Load Current (A), 3.3Vout/5.0Vout
Figure 3: Efficiency vs. load current, with total output power fixed at
100% load (40W) and load currents split as shown between 3.3V and
5.0V outputs at minimum, nominal, and maximum input voltage at 25°C.
Figure 4: Power dissipation vs. load current, with total output power
fixed at 100% load (40W) and load currents split as shown between 3.3V
and 5.0V outputs at minimum, nominal, and max input voltage at 25°C.
5
93
91
90
89
25 C
40 C
55 C
88
87
0
100
200
300
400
500
Air Flow (LFM)
Figure 5: Efficiency at 100% load and 50/50 voltage split (6.1A load on
3.3V and 4A load on 5.0V) versus airflow rate for ambient air temperatures of 25°C, 40°C.and 55°C.(nominal input voltage).
Product # DQ65033QKA04
Phone 1-888-567-9596
Power Dissipation (W)
92
Efficiency (%)
16
Total Output Power (W)
4
3
2
25 C
40 C
55 C
1
0
0
100
200
300
400
500
Air Flow (LFM)
Figure 6: Power dissipation at 100% load and 50/50 voltage split (6.1A
load on 3.3V and 4A load on 5.0V) versus airflow rate for ambient air
temperatures of 25°C, 40°C.and 55°C.(nominal input voltage).
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 5
Technical Specification
5.2
Input voltage effects cross regulation by maximum of 1mV
3.375
3.35
3.325
5.05
3.3
VOUT2 (V)
5.1
VOUT1 (V)
3.35
5
3.275
4.95
3.25
4.9
3.3V_48Vin
5.0V_48Vin
3.225
3.2
10.5/1
9/2
7.5/3
6/4
4.5/5
3/6
1.5/7
5.05
3.3
5.00
3.275
4.95
9.1/0
0/8
7.5/1
6.1/2
0/6
5.2
Input voltage effects cross regulation by maximum of 1mV
3.375
5
VOUT1 (V)
5.05
VOUT2 (V)
VOUT1 (V)
1.5/5
3.4
Input voltage effects cross regulation by maximum of 1mV
3.3
3/4
Figure 8: Load regulation vs. load current with power fixed at 75%
load (30W) and load currents split as shown between 3.3V and 5.0V
outputs, at nominal input voltage.
5.1
3.325
4.85
4.5/3
IOUT1 / IOUT2 (A)
IOUT1 / IOUT2 (A)
Figure 7: Load regulation vs. load current with power fixed at full load
(40W) and load currents split as shown between 3.3V and 5.0V outputs,
at nominal input voltage.
3.35
4.90
3.3V_48Vin
5.0V_48Vin
3.225
4.8
12/0
5.10
3.325
3.25
4.85
5.15
Input voltage effects cross regulation by maximum of 1mV
5.15
VOUT1 (V)
3.375
5.15
3.35
5.1
3.325
5.05
3.3
5
3.275
4.95
3.275
3.3V_48Vin
5.0V_48Vin
4.9
10
15
4.95
3.25
4.9
3.3V_48Vin
5.0V_48Vin
3.225
3.25
20
25
4.85
3.2
30
VOUT2 (V)
3.4
35-75V
5.0V & 3.3V
40W
Quarter-brick
VOUT2 (V)
Input:
Outputs:
Current:
Package:
4.8
3
7
10
13
17
20
23
27
30
33
37
40
Total Output Power (W)
Total Output Power (W)
Figure 9: Load regulation vs. output power from 10W load to 30W with
75% load on 3.3V output and 25% load on 5.0V output at nominal input
voltage.
Figure 10: . Load regulation vs. output power from 3W load to full load
with 25% load on 3.3V output and 75% load on 5.0V output at nominal
input voltage.
13
12
11
10
9
Iout (A)
8
7
6
5
400 LFM (2.0 m/s)
4
3
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
2
100 LFM (0.5 m/s)
1
0 LFM (0 m/s)
0
0
25
40
55
70
Semiconductor junction temperature is
within 1°C of surface temperature
85
Ambient Air Temperature (oC)
Figure 11: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 to 400 LFM, air flowing from pin 3 to pin
1. Full load (12.1A) on 3.3V output and no load on 5.0V output.
Product # DQ65033QKA04
Phone 1-888-567-9596
Figure 12: Thermal plot of converter at 12.1 amp load on 3.3V ouput
and no load on 5.0V output with 55°C air flowing at 200 LFM. Air flow
across the converter is from pin 3 to pin 1 (nominal input voltage)
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 6
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
9
8
7
Iout (A)
6
5
4
400 LFM (2.0 m/s)
3
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
1
0 LFM (0 m/s)
0
0
25
40
55
70
85
Semiconductor junction temperature is
within 1°C of surface temperature
o
Ambient Air Temperature ( C)
Figure 13: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 to 400 LFM, air flowing from pin 3 to pin
1. Full load (8A) on 5.0V output and no load on 3.3V output.
Figure 14: Thermal plot of converter at 8 amp load on 5.0V ouput and
no load on 3.3V output with 55°C air flowing at 200 LFM. Air flow
across the converter is from pin 3 to pin 1 (nominal input voltage)
7
6
Iout (A)
5
4
3
400 LFM (2.0 m/s)
2
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
1
100 LFM (0.5 m/s)
0 LFM (0 m/s)
0
0
25
40
55
70
Semiconductor junction temperature is
within 1°C of surface temperature
85
Ambient Air Temperature (oC)
Figure 15: Max output power-derating curves vs. air temp for 0 - 400 LFM, pin
3 to pin 1. 50% load (6A) on 3.3V output and 50% load (4A) on 5.0V output. At
derating points, 3.3V output decreases while 5.0V output remains unchanged.
Figure 16: Thermal plot of converter at 6 amp load on 3.3V ouput and
4 amp load on 5.0V output with 70°C air flowing at 200 LFM. Air flow
across the converter is from pin 3 to pin 1 (nominal input voltage)
9
8
7
Iout (A)
6
5
4
3
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
1
0 LFM (0 m/s)
0
0
25
40
55
70
85
Semiconductor junction temperature is
within 1°C of surface temperature
Ambient Air Temperature (oC)
Figure 17: Max output power derating curves vs. air temp for 0 to 400 LFM, pin
3 to pin 1. 70% load (8.5A) on 3.3V output and 30% load (2.4A) on 5.0V output.
At derating points, 3.3V output decreases while 5.0V output remains unchanged.
Product # DQ65033QKA04
Phone 1-888-567-9596
Figure 18: Thermal plot of converter at 8.5 amp load on 3.3V ouput and
2.4 amp load on 5.0V output with 55°C air flowing at 200 LFM. Air
flow across the converter is from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 7
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
3.3Vout
3.3Vout
5.0Vout
5.0Vout
Figure 19: Turn-on transient at full rated load current (resistive load)
(10 ms/div). Input voltage pre-applied. Ch 1: 3.3Vout (1V/div); Ch 2:
5.0Vout (2V/div), Ch 3: ON/OFF input (5V/div)
3.3Vout
Figure 20: Turn-on transient at zero load current (10 ms/div). Ch 1:
3.3Vout (1V/div); Ch 2: 5.0Vout (2V/div), Ch 3: ON/OFF input
(5V/div).
3.3Vout
3.3Iout
3.3Iout
5.0Vout
5.0Vout
5.0Iout
5.0Iout
Figure 21: Output voltage response to step-change in Iout1 (50%-75%-50% of Imax;
dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum cap & 1µF ceramic cap.
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2
Figure 22: Output voltage response to step-change in Iout2 (50%-75%-50% of Imax;
dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum cap & 1µF ceramic cap..
Vout (200mV/div), Iout (5A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2
See Fig. 25
10 µH
source
impedance
See Fig. 24
iS
VSOURCE
See Fig. 26
VOUT2+
iC
47 µF,
<1Ω ESR
electrolytic
capacitor
DC/DC
Converter
VOUT1+
1 µF
ceramic
capacitors
15 µF,
300mΩ ESR
tantalum
capacitors
COM (-)
Figure 23: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 24), Input Reflected Ripple Current
(Figure 25) and Output Voltage Ripple (Figure 26).
Product # DQ65033QKA04
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Figure 24: Input Terminal Ripple Current, 3.3V & 5.0V outputs at 50%
rated output current and nominal input voltage with 10µH source
impedance and 100µF electrolytic capacitor (200 mA/div). (see Fig. 23)
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 8
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
3.3Vout
5.0Vout
Figure 25: Input reflected ripple current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (5 mA/div).
3.3V and 5.0V outputs at 50% rated load current. (see Fig. 23)
Figure 26: Output voltage ripple at nominal input voltage and 50%
rated load current on both outputs (50 mV/div). Load capacitance: 1µF
ceramic cap & 15µF tantalum cap. Bandwidth: 20 MHz. (see Fig. 23)
4.0
6.0
5.5
Output Voltage (V)
Output Voltage (V)
3.5
3.0
2.5
35 V
2.0
48 V
5.0
4.5
4.0
3.5
35 V
3.0
48 V
2.5
75 V
1.5
75 V
2.0
0
2
4
6
8
10
12
14
16
18
Load Current (A)
0
1
2
3
4
5
6
7
8
9
10
11
12
Load Current (A)
Figure 27: Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the 3.3V output. 5.0V load is
at 0A.
Figure 28: Output voltage vs. load current showing typical current limit
curves and converter shutdown points for the 5.0V output. 3.3V load is
at 0A.
Figure 29: Load current for 3.3V output (10A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit.
Bottom trace is an expansion of the on-time portion of the top trace.
Figure 30: Load current for 5.0V output (10A/div) as a function of time
when the converter attempts to turn on into a 10 mΩ short circuit. Top
trace is an expansion of the on-time portion of the bottom trace.
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 9
Input:
Outputs:
Current:
Package:
Technical Specification
1
35 Vin
0.1
48 Vin
75 Vin
Output Impedance (Ω )
1
Output Impedance (Ω )
35-75V
5.0V & 3.3V
40W
Quarter-brick
0.01
0.1
35 Vin
48 Vin
75 Vin
0.01
0.001
10
100
1,000
10,000
100,000
10
100
1,000
10,000
100,000
Hz
Figure 31: Output impedance (Zout1 = Vout1/Iout1) for minimum,
nominal, and maximum input voltage at full rated power, for 3.3V output.
Figure 32: Output impedance (Zout2 = Vout2/Iout2) for minimum,
nominal, and maximum input voltage at full rated power, for 5.0V output.
-20
-20
-30
-30
-40
-40
-50
-60
35 Vin
48 Vin
-70
75 Vin
-80
-90
Forward Transmission (dB)
Forward Transmission (dB)
Hz
-100
-50
-60
35 Vin
48 Vin
-70
75 Vin
-80
-90
-100
-110
10
100
1,000
10,000
-110
100,000
10
100
1,000
Hz
10,000
100,000
Hz
Figure 33: Forward Transmission (FT1 = Vout1/Vin) for minimum,
nominal, and maximum input voltage at full rated power, for 3.3V output.
Figure 34: Forward Transmission (FT2 = Vout2/Vin) for minimum,
nominal, and maximum input voltage at full rated power, for 5.0V output.
0
10
Reverse Transmission (dB)
-10
35 Vin
-20
48 Vin
75 Vin
-30
-40
Reverse Transmission (dB)
-5
0
-10
-15
-20
35 Vin
-25
48 Vin
-30
75 Vin
-35
-40
-45
-50
10
100
1,000
10,000
100,000
-50
10
100
1,000
Hz
Figure 35: Reverse Transmission (RT1 = Iin/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output.
Product # DQ65033QKA04
10,000
100,000
Hz
Phone 1-888-567-9596
Figure 36: Reverse Transmission (RT2 = Iin/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 5.0V output.
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 10
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
Input Impedance (Ω )
1000
100
35 Vin
10
48 Vin
75 Vin
1
0.1
10
100
1,000
Hz
10,000
100,000
Figure 37: Input impedance (Zin = Vin/Iin) for minimum, nominal, and
maximum input voltage at full rated power.
Product # DQ65033QKA04
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Doc.# 005-2DQ653L Rev. B
11/11/04
Page 11
Input:
Outputs:
Current:
Package:
Technical Specification
BASIC OPERATION AND FEATURES
The DualQor series converter uses a two-stage power conversion
topology in which the two output voltages are cross regulated.
The first stage is a buck-converter that keeps the output voltage
constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of
input/output isolation and voltage step-down to achieve the low
output voltage required.
The two-stage solution is ideal for converters with multiple crossregulated output voltages. The first-stage compensates for any
variations in line voltage. Therefore, the dependence of the output voltage on line variations is minimized.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the
primary reason that the DualQor series of converters has such
high efficiency, even at very low output voltages and very high
output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. However, baseplated versions
are available for optional heatsinking in severe thermal environments.
The DualQor has many standard control and protection features. All shutdown features are non-latching, meaning that
the converter shuts off for 200 ms before restarting. (See
Figure F)
CONTROL FEATURES
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus,
Vin(-). There
are two versions of the converter that differ by the sense of the
logic used for the ON/OFF input.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry.
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage up or down according to the trim
range specifications. It is important to recognize that adjusting
one output will also adjust the second output proportionally. To
lower the output voltage, the user should connect a resistor
between Pin 6 and Pin 4. To raise the output voltage, the user
should connect a resistor between Pin 6 and Pin 5. The following table shows the resistor values needed to trim the output volt-
The DualQor series converter uses the industry standard footprint and pin-out configuration.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
35-75V
5.0V & 3.3V
40W
Quarter-brick
Vo(%)
R up
R down
Positive Logic
(Permanently Enabled)
5V
1
50
67
2
23
30
3
14
17
4
5
6
7
8
9
9.2 6.4 4.5 3.1 2.1 1.3
11 7.8 5.4 3.7 2.4 1.4
Vin(+)
10
0
0
5V
274k
ON/OFF
50k
TTL
TTL/
CMOS
ON/OFF
Vin(_)
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # DQ65033QKA04
100pF
50k
Phone 1-888-567-9596
Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 12
Input:
Outputs:
Current:
Package:
Technical Specification
age up or down.
Resistor values in Kohms for the desired increase/decrease (typical) in output voltage (%)
Note: The TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value
(listed on the specification page) before the converter will turn
on. Once the converter is on, the input voltage must fall below
the typical Turn-Off Voltage Threshold value before the converter
will turn off.
Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance
of the short across the output is small enough to make the output
voltage drop below the specified Output DC Current-Limit
Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the OverTemperature Shutdown value. It will allow the converter to turn on
again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor web site
(www.synqor.com) which provides an understanding of why
this instability arises, and shows the preferred solution for correcting it.
Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming.
Vin(+ )
Vin
External
Input
Filter
Electrolytic
Capacitor
47µF
35-75V
5.0V & 3.3V
40W
Quarter-brick
5.0 Vout(+ )
Trim
ON/OFF
Iload
Rtrim-up
Cload
OP RTN
or
Rtrim-down
Vin(_)
Cload
3.3 Vout(+ )
Iload
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 13
Input:
Outputs:
Current:
Package:
Technical Specification
Input Filtering and External Capacitance: Figure E provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the “Input Characteristics” section. More
detailed information is available in the application note titled
“EMI Characteristics” on the SynQor website.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for at least 200ms when it is shut
down for any reason. When an output short is present, this generates a 5Hz "hiccup mode," which prevents the converter from
overheating. In all, there are seven ways that the converter can
be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
35-75V
5.0V & 3.3V
40W
Quarter-brick
L
Vin(+)
C
Vin(_)
Figure E: Internal Input Filter Diagram (values listed on page 3).
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
• Output Over-Voltage Protection
• Over Temperature Shutdown
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
OFF
OFF ON
ON
4ms (typical
Vout
turn on time)
200ms
(typical start-up
inhibit period)
t0
200ms
200ms
t1
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 14
Input:
Outputs:
Current:
Package:
Technical Specification
35-75V
5.0V & 3.3V
40W
Quarter-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s DualQor DC/DC
converters follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options.
DQ 6 50 33 Q K A 04 N K S
Options (see
Ordering Information)
Output Power
Thermal Design/Profile
Performance Level
Model Number
Input Voltage
DQ65033QKA04xyz
DQ61212QKA04xyz
35 - 75 V
35 - 75 V
Output Max Output
Voltages
Power
5.0/3.3 V
40 W
+12/-12 V
40 W
Package Size
Output Voltage 2
Output Voltage 1
Input Voltage
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Options Description: x y z
Product Family
Enable
Logic
The first 12 characters comprise the base part number and the
last 3 characters indicate available options. Although there
are no default values for enable logic and pin length, the most
common options are negative logic and 0.145” pins. These
part numbers are more likely to be readily available in stock
for evaluation and prototype quantities.
Pin
Length
K - 0.110"
P - Positive N - 0.145"
N - Negative R - 0.180"
Y - 0.250"
Feature
Set
S - Standard
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format at www.synqor.com.
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # DQ65033QKA04
978-849-0600
888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
Phone 1-888-567-9596
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our web site or is available upon request from
SynQor.
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 15