Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 1
Technical
Specification
IQ72xxxQTXxx
42-110V 3.3-48V 150W 3000Vdc Quarter-brick
Continuous Input Outputs Max Power REINFORCED Insulation DC-DC Converter
Protection Features
The InQor quarter-brick converter series is composed
of next-generation, board-mountable, isolated
(REINFORCED), xed switching frequency dc-dc converters
that use synchronous rectication to achieve extremely
high power conversion efciency. Each module is supplied
completely encased to provide protection from the harsh
environments seen in many industrial and transportation
applications.
Operational Features
• High efciency, 92% at full rated load current
• Delivers full power with minimal derating - no heatsink required
• Operating input voltage range: 42-110V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
• Input under-voltage lockout
• Output current limit and short circuit protection
• Active back bias limit
• Output over-voltage protection
• Thermal shutdown
Mechanical Features
• Industry standard quarter-brick pin-out conguration
• Size: 1.536" x 2.386" (39.01 x 60.6)
• Height: 0.500” (12.7mm)
• Weight: 3.02oz (85.6g)
Control Features
• On/Off control referenced to input side
• Remote sense for the output voltage
• Output voltage trim range of -20%, +10%
Safety Features
Reinforced Insulation
• Input-to-output isolation 3000V
• UL 60950-1 2nd Ed. 2007
• CAN/CSA-C22.2 No. 60950-1-07
• EN60950-1 Ed. 2.0
• CE Marked
• RoHS compliant (see last page)
CONTENTS
Page No.
Family Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics (3.3 Vout) & Figures . . . . . . . . . . . . . . . . . . . 4
Electrical Characteristics (5 Vout) & Figures . . . . . . . . . . . . . . . . . . . . . 6
Electrical Characteristics (7 Vout) & Figures . . . . . . . . . . . . . . . . . . . . . 8
Electrical Characteristics (12 Vout) & Figures . . . . . . . . . . . . . . . . . . . .10
Electrical Characteristics (15 Vout) & Figures . . . . . . . . . . . . . . . . . . . .12
Electrical Characteristics (24 Vout) & Figures . . . . . . . . . . . . . . . . . . . .14
Electrical Characteristics (30 Vout) & Figures . . . . . . . . . . . . . . . . . . . .16
Electrical Characteristics (48 Vout) & Figures . . . . . . . . . . . . . . . . . . . .18
Application Section ......................................20
Standards & Qualification Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Encased Mechanical Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Flanged Mechanical Drawing................................26
Ordering Information.....................................27
IQ72050QTC25NRS-G
42-110V
IN
5V
OUT @ 25A
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 2
Technical
Specification
IQ72xxxQTXxx
Family Electrical Characteristics
IQ72 Family Electrical Characteristics (all output voltages)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating 120 V Continuous
Operating 110 V Continuous
Operating Transient Protection - V
Isolation Voltage
Input to Output 3000 V dc
Input to Base-Plate 3000 V dc
Output to Base-Plate 3000 V dc
Operating Temperature -40 100 °C Baseplate temperature
Storage Temperature -55 125 °C
Voltage at ON/OFF input pin -2 18 V
INPUT CHARACTERISTICS
Operating Input Voltage Range 42 72 110 V See Note 1
Input Under-Voltage Lockout
Turn-On Voltage Threshold 38.8 40.3 41.8 V
Turn-Off Voltage Threshold 35.2 36.8 38.4 V
Lockout Voltage Hysteresis 3.5 V
Input Over-Voltage Shutdown - V Not Available
Recommended External Input Capacitance 100 µF Typical ESR 0.1-0.2 Ω
Input Filter Component Values (L\C) 6.8\1.2 µH\µF Internal values; see Figure D
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time 9 ms Full load, Vout=90% nom.
Start-Up Inhibit Time 200 230 250 ms -40 °C to +125 °C; Figure E
Output Voltage Overshoot 0 % Maximum Output Capacitance
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength) See Absolute Maximum Ratings
Isolation Resistance 100 MΩ
Isolation Capacitance (input to output) 1000 pF See Note 2
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature 125 °C Package rated to 150 °C
Board Temperature 125 °C UL rated max operating temp 130 °C
Transformer Temperature 125 °C
Maximum Baseplate Temperature, Tb 100 °C
FEATURE CHARACTERISTICS
Switching Frequency 230 250 270 kHz Isolation stage switching freq. is half this
ON/OFF Control
Off-State Voltage 2.4 18 V
On-State Voltage -2 0.8
ON/OFF Control Application notes Figures A & B
Pull-Up Voltage 5 V
Pull-Up Resistance 50 kΩ
Over-Temperature Shutdown OTP Trip Point 125 °C Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis 10 °C
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332 2.5 106 Hrs. 80% load, 200LFM, 40 °C Ta
Calculated MTBF (MIL-217) MIL-HDBK-217F 2 106 Hrs. 80% load, 200LFM, 40 °C Ta
Field Demonstrated MTBF 106 Hrs. See our website for details
Note 1: Output voltage regulation can not be achieved on certain output voltages at or near 18 V input.
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 3
Technical
Specification
IQ72xxxQTXxx
10.0
100.0
1,000.0
10,000.0
100,000.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Increase in Vout (%)
Trim Resistance (kOhms)
1.8 V 3.3 V 5 V 7 V 12 V
10.0
100.0
1,000.0
10,000.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Decrease in Vout (%)
Trim Resistance (kOhms)
All voltages
100.0
1,000.0
10,000.0
100,000.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Increase in Vout (%)
15 V 24 V 30 V 48 V
0
20
40
60
80
100
120
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Load Current (%)
Output Voltage (%)
Vin min
Vin nom
Vin max
Family Figures (all output voltages)
Nominal Vout
Common Figure 1: Typical startup waveform. Input voltage pre-applied, ON/
OFF Pin on Ch 2.
Common Figure 2: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Common Figure 3: Trim graph for trim-up 1.8 to 12V outputs. Common Figure 4: Trim graph for trim-up 15 to 48V outputs.
Common Figure 5: Trim graph for trim down.
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 4
Technical Specification
Electrical Characteristics (3.3 Vout) & Figures
IQ72033QTx30 Electrical Characteristics(3.3 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 3.5 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.8 V See Figure 6
Input Terminal Ripple Current 130 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 3.267 3.3 3.333 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -50 50 mV
Total Output Voltage Range 3.218 3.383 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 80 160 mV Full load
RMS 15 30 mV Full load
Operating Output Current Range 0 30 A Subject to thermal derating
Output DC Current-Limit Inception 33.0 36.0 39.0 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 1.5 V
Back-Drive Current Limit while Enabled 2.4 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 90 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 3.9 4.0 4.2 V Over full temp range
EFFICIENCY
100% Load 90 % See Figure 1 for efciency curve
50% Load 90 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Trim-up range is limited below 10% at low line and full load.
Input:42-110V
Output:3.3V
Current:30A
Part No.:IQ72033QTx30
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 5
Technical Specification
0
3
6
9
12
15
0 3 6 9 12 15 18 21 24 27 30
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0 3 6 9 12 15 18 21 24 27 30
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
3
6
9
12
15
18
21
24
27
30
33
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
3
6
9
12
15
18
21
24
27
30
33
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic and 15 μF tantalum capacitors. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:3.3V
Current:30A
Part No.:IQ72033QTx30
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 6
Technical Specification
Electrical Characteristics (5 Vout) & Figures
IQ72050QTx25 Electrical Characteristics(5.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 4.4 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.12 V See Figure 6
Input Terminal Ripple Current 170 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 4.95 5 5.05 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -75 75 mV
Total Output Voltage Range 4.875 5.125 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 150 300 mV Full load
RMS 15 30 mV Full load
Operating Output Current Range 0 25 A Subject to thermal derating
Output DC Current-Limit Inception 27.5 30.0 32.5 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 2.8 V
Back-Drive Current Limit while Enabled 0.9 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 8,000 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 150 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 5.9 6.1 6.4 V Over full temp range
EFFICIENCY
100% Load 90 % See Figure 1 for efciency curve
50% Load 92 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Input:42-110V
Output:5V
Current:25A
Part No.:IQ72050QTx25
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 7
Technical Specification
0
3
6
9
12
15
18
0 5 10 15 20 25
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0 5 10 15 20 25
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
5
10
15
20
25
30
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
5
10
15
20
25
30
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic and 15 μF tantalum capacitors. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:5V
Current:25A
Part No.:IQ72050QTx25
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 8
Technical Specification
Electrical Characteristics (7 Vout) & Figures
IQ72070QTx20 Electrical Characteristics(7.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 4.9 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.25 V See Figure 6
Input Terminal Ripple Current 190 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 6.93 7 7.07 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -105 105 mV
Total Output Voltage Range 6.825 7.175 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 90 180 mV Full load
RMS 20 40 mV Full load
Operating Output Current Range 0 20 A Subject to thermal derating
Output DC Current-Limit Inception 22.0 24.0 26.0 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 2.9 V
Back-Drive Current Limit while Enabled 0.8 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 4,000 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 180 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 8.2 8.5 8.9 V Over full temp range
EFFICIENCY
100% Load 90 % See Figure 1 for efciency curve
50% Load 92 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Trim-up range is limited below 10% at low line and full load.
Input:42-110V
Output:7V
Current:20A
Part No.:IQ72070QTx20
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 9
Technical Specification
0
3
6
9
12
15
18
0 2 4 6 8 10 12 14 16 18 20
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0 2 4 6 8 10 12 14 16 18 20
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
5
10
15
20
25
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
5
10
15
20
25
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic and 15 μF tantalum capacitors. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:7V
Current:20A
Part No.:IQ72070QTx20
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 10
Technical Specification
Electrical Characteristics (12 Vout) & Figures
IQ72120QTx12 Electrical Characteristics(12.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 4.5 A Vin min; Vout nom; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.35 V
Input Terminal Ripple Current 190 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 11.88 12 12.12 V
Output Voltage Regulation see Note 3
Over Line ±0.1 ±0.3 % see Note 3
Over Load ±0.1 ±0.3 %
Over Temperature -180 180 mV
Total Output Voltage Range 11.70 12.30 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 90 180 mV Full load
RMS 20 40 mV Full load
Operating Output Current Range 0 12 A Subject to thermal derating
Output DC Current-Limit Inception 13.2 14.4 15.6 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 5.2 V
Back-Drive Current Limit while Enabled 0.8 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 1,500 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 440 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 14.0 14.6 15.2 V Over full temp range
EFFICIENCY
100% Load 91 % See Figure 1 for efciency curve
50% Load 92 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Trim-up range is limited below 10% at an input voltage less than 21 V.
Note 3: Output voltage regulation cannot be achieved for an input voltage less than 19V.
Input:42-110V
Output:12V
Current:12A
Part No.:IQ72120QTx12
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 11
Technical Specification
0
3
6
9
12
15
18
0 1 2 3 4 5 6 7 8 9 10 11 12
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0123456789101112
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
2
4
6
8
10
12
14
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
2
4
6
8
10
12
14
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic and 15 μF tantalum capacitors. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:12V
Current:12A
Part No.:IQ72120QTx12
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 12
Technical Specification
Electrical Characteristics (15 Vout) & Figures
IQ72150QTx10 Electrical Characteristics(15.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 5.2 A Vin min; Vout nom; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.38 V See Figure 6
Input Terminal Ripple Current 180 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 14.85 15 15.15 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -225 225 mV
Total Output Voltage Range 14.63 15.38 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 150 300 mV Full load
RMS 30 60 mV Full load
Operating Output Current Range 0 10 A Subject to thermal derating
Output DC Current-Limit Inception 11.0 12.0 13.0 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 5.8 V
Back-Drive Current Limit while Enabled 0.8 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 1,000 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 640 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5; see Note 2
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 17.6 18.3 19.1 V Over full temp range
EFFICIENCY
100% Load 91 % See Figure 1 for efciency curve
50% Load 92 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Trim-up range is limited below 10% at an input voltage less than 20 V.
Input:42-110V
Output:15V
Current:10A
Part No.:IQ72150QTx10
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 13
Technical Specification
0
3
6
9
12
15
18
0.0 2.0 4.0 6.0 8.0 10.0
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0.0 2.0 4.0 6.0 8.0 10.0
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
1
2
3
4
5
6
7
8
9
10
11
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
2
4
6
8
10
12
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic and 15 μF tantalum capacitors. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:15V
Current:10A
Part No.:IQ72150QTx10
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 14
Technical Specification
Electrical Characteristics (24 Vout) & Figures
IQ72240QTx06 Electrical Characteristics(24.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 5.0 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.6 V See Figure 6
Input Terminal Ripple Current 200 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 23.76 24 24.24 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -360 360 mV
Total Output Voltage Range 23.40 24.60 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 140 280 mV Full load
RMS 20 40 mV Full load
Operating Output Current Range 0 6 A Subject to thermal derating
Output DC Current-Limit Inception 6.6 7.2 7.8 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 12 V
Back-Drive Current Limit while Enabled 0.2 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 400 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 1800 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 28.1 29.3 30.5 V Over full temp range
EFFICIENCY
100% Load 90 % See Figure 1 for efciency curve
50% Load 91 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic capacitor. For applications requiring reduced output voltage ripple and noise, consult SynQor applications
support (e-mail: support@synqor.com)
Input:42-110V
Output:24V
Current:6A
Part No.:IQ72240QTx06
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 15
Technical Specification
0
3
6
9
12
15
18
0123456
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0123456
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0
1
2
3
4
5
6
7
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
1
2
3
4
5
6
7
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic capacitor. Ch 1:
Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic capacitor. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:24V
Current:6A
Part No.:IQ72240QTx06
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 16
Technical Specification
Electrical Characteristics (30 Vout) & Figures
IQ72300QTx05 Electrical Characteristics(30.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 5.3 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.65 V See Figure 6
Input Terminal Ripple Current 220 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 29.7 30 30.3 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -450 450 mV
Total Output Voltage Range 29.25 30.75 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 140 280 mV Full load
RMS 20 40 mV Full load
Operating Output Current Range 0 5 A Subject to thermal derating
Output DC Current-Limit Inception 5.5 6.0 6.5 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 13 V
Back-Drive Current Limit while Enabled 0.15 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 250 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 2300 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 35.1 36.6 38.1 V Over full temp range
EFFICIENCY
100% Load 89 % See Figure 1 for efciency curve
50% Load 91 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic capacitor. For applications requiring reduced output voltage ripple and noise, consult SynQor applications
support (e-mail: support@synqor.com)
Input:42-110V
Output:30V
Current:5A
Part No.:IQ72300QTx05
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 17
Technical Specification
0
3
6
9
12
15
18
0.0 1.0 2.0 3.0 4.0 5.0
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0.0 1.0 2.0 3.0 4.0 5.0
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0.0
1.0
2.0
3.0
4.0
5.0
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0.0
1.0
2.0
3.0
4.0
5.0
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic capacitor. Ch 1:
Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic capacitor. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:30V
Current:5A
Part No.:IQ72300QTx05
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 18
Technical Specification
Electrical Characteristics (48 Vout) & Figures
IQ72480QTx03 Electrical Characteristics(48.0 Vout)
Ta = 25 °C, airow rate = 300 LFM, Vin = 72V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 5.1 A Vin min; trim up; in current limit
No-Load Input Current 45 60 mA
Disabled Input Current 2 4 mA
Response to Input Transient 0.7 V See Figure 6
Input Terminal Ripple Current 230 mA RMS
Recommended Input Fuse 7 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 47.52 48 48.48 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -720 720 mV
Total Output Voltage Range 46.80 49.20 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 240 480 mV Full load
RMS 20 40 mV Full load
Operating Output Current Range 0 3 A Subject to thermal derating
Output DC Current-Limit Inception 3.30 3.60 3.90 A Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage 22 V
Back-Drive Current Limit while Enabled 0.1 A Negative current drawn from output
Back-Drive Current Limit while Disabled 10 mA Negative current drawn from output
Maximum Output Capacitance 100 µF Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 3100 mV 50% to 75% to 50% Iout max
Settling Time 400 µs To within 1% Vout nom
Output Voltage Trim Range -20 10 % Across Pins 8&4; Common Figures 3-5
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 56.2 58.6 61.0 V Over full temp range
EFFICIENCY
100% Load 88 % See Figure 1 for efciency curve
50% Load 91 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic capacitor. For applications requiring reduced output voltage ripple and noise, consult SynQor applications
support (e-mail: support@synqor.com)
Input:42-110V
Output:48V
Current:3A
Part No.:IQ72480QTx03
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 19
Technical Specification
0
3
6
9
12
15
18
21
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Load Current (A)
Power Dissipation (W)
42Vin
72Vin
110Vin
60
65
70
75
80
85
90
95
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Load Current (A)
Efficiency (%)
42Vin
72Vin
110Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
25 40 55 70 85
Ambient Air Temperature (°C)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 1: Efciency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 3: Encased Converter (no heatsink) max. output power derating vs.
ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/4" heatsink) max. output power derating
vs. ambient air temperature for airow rates of 100 LFM through 400 LFM. Air
ows across the converter from input to output (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic capacitor. Ch 1:
Vout, Ch 2: Iout.
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 1 μF ceramic capacitor. Ch 1: Vout, Ch 2: Vin.
Input:42-110V
Output:48V
Current:3A
Part No.:IQ72480QTx03
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 20
Technical
Specification
IQ72xxxQTXxx
BASIC OPERATION AND FEATURES
This converter series uses a two-stage power conversion
topology. 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-up or
step-down to achieve the output voltage required.
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 converter has such
high efficiency, even at very low output voltages and very high
output currents.
These converters are offered totally encased to withstand harsh
environments and thermally demanding applications. Dissipation
throughout the converter is so low that it does not require a
heatsink for operation in many applications; however, adding
a heatsink provides improved thermal derating performance in
extreme situations.
This series of converters use the industry standard footprint and
pin-out configuration.
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(-).
The ON/OFF signal is active low (meaning that a low turns the
converter on). Figure A details four possible circuits for driving
the ON/OFF pin. Figure B is a detailed look of the internal ON/
OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be
connected to Vout(-) at the point on the board where regulation
is desired. A remote connection at the load can adjust for a
voltage drop only as large as that specified in this datasheet,
that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of
the output voltage. If these connections are not made, the
converter will deliver an output voltage that is slightly higher
than its specified value.
Note: the output over-voltage protection circuit senses the
voltage across the output (pins 8 and 4) to determine when
it should trigger, not the voltage across the converter’s sense
leads (pins 7 and 5). Therefore, the resistive drop on the board
should be small enough so that output OVP does not trigger,
even during load transients.
Open Collector Enable Circuit
Remote Enable Circuit
Direct Logic Drive
Negative Logic
(Permanently Enabled)
ON/OFF
Vin(_)
ON/OFF
ON/OFF
Vin(_)
ON/OFF
5V
TTL/
CMOS
Vin(_)
Vin(_)
Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry
TTL
5V
50k
50k
ON/OFF
Vin(_)
100pF
50k
50k
100pF
Application Section
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 21
Technical
Specification
IQ72xxxQTXxx
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
To decrease the output voltage, the user should connect a
resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be
Rtrim-down =
(
511
)
- 10.22 (kW)
D%
where
D% =
Vnominal – Vdesired
x 100%
Vnominal
To increase the output voltage, the user should connect a
resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
Trim graphs show the relationship between the trim resistor
value and Rtrim-up and Rtrim-down, showing the total range the
output voltage can be trimmed up or down.
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.
It is not necessary for the user to add capacitance at the Trim
pin. The node is internally bypassed to eliminate noise.
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
” on our
website. 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 specifications 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 load 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
Over-Temperature 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.
Rtrim-up
(k
W)
where Vout = Nominal Output Voltage
511
_ 10.22
5.11VOUT x
(100+
D%)
1.225D%D%
)
=
(
_
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 22
Technical
Specification
IQ72xxxQTXxx
APPLICATION CONSIDERATIONS
Figure C: Typical application circuit (negative logic unit, permanently enabled).
Figure D: Internal Input Filter Diagram (component values listed on the specifications page).
Vin
External
Input
Filter
Trim
Vin(+)
Iload
Cload
Vout(+)
Rtrim-up
or
Rtrim-down
Vsense(+)
ON/OFF
Vin(_)Vout(_)
Vsense(_)
Electrolytic
Capacitor
C
L
Vin(+)
Vin(_)
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 website which provides
an understanding of why this instability arises, and shows the
preferred solution for correcting it.
Application Circuits: Figure C provides a typical circuit diagram
which details the input filtering and voltage trimming.
Input Filtering and External Capacitance:
Figure D
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 on the
Electrical Characteristics
page.
More detailed information is available in the application note
titled “
EMI Characteristics
” on the
SynQor website.
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 23
Technical
Specification
IQ72xxxQTXxx
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200 ms when it is
shut down for any reason. When an output short is present, this
generates a 5 Hz “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Lockout
• OutputOver-VoltageProtection
• OverTemperatureShutdown
• CurrentLimit
• ShortCircuitProtection
• TurnedoffbytheON/OFFinput
Figure E 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,
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.
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.
Thermal Considerations: The maximum operating base-plate
temperature, TB, is 100 ºC. As long as the user’s thermal system
keeps TB < 100 ºC, the converter can deliver its full rated power.
A power derating curve can be calculated for any heatsink that is
attached to the base-plate of the converter. It is only necessary
to determine the thermal resistance, RTHBA, of the chosen heatsink
between the base-plate and the ambient air for a given airflow
rate. This information is usually available from the heatsink
vendor. The following formula can the be used to determine the
maximum power the converter can dissipate for a given thermal
condition if its base-plate is to be no higher than 100 ºC.
Pmax = 100 ºC - TA
diss RTHBA
This value of power dissipation can then be used in conjunction
with the data shown in Figure 2 to determine the maximum load
current (and power) that the converter can deliver in the given
thermal condition.
For convenience, power derating curves for an encased converter
without a heatsink and with a typical heatsink are provided for
each output voltage.
Figure E: Startup Inhibit Period (turn-on time not to scale)
Under-Voltage
Lockout Turn-
On Threshold
ON/OFF
(neg logic)
Vout
Vin
200ms 200ms
200ms
(typical start-up
inhibit period)
t0t1t2
t
9ms (typical
turn on time)
ON ON ON
OFF OFF
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 24
Technical
Specification
IQ72xxxQTXxx
Standards & Qualification Testing
Parameter Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1 2nd Ed. 2007 Reinforced Insulation
CAN/CSA-C22.2 No. 60950-1-07
EN60950-1 Ed. 2.0
CE Marked 2006/95/EC Low Voltage Directive
IEC 61000-4-2 ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for ofcial safety certicates on new
releases or download from the SynQor website.
Parameter # Units Test Conditions
QUALIFICATION TESTING
Life Test 32 95% rated Vin and load, units at derating point, 1000 hours
Vibration 5 10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock 5 100g minimum, 2 drops in x, y and z axis
Temperature Cycling 10 -40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Power/Thermal Cycling 5 Toperating = min to max, Vin = min to max, full load, 100 cycles
Design Marginality 5 Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
Humidity 5 85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
Solderability 15 pins MIL-STD-883, method 2003
Altitude 2 70,000 feet (21 km), see Note
Note: A conductive cooling design is generally needed for high altitude applications because of naturally poor convective cooling at rare atmospheres.
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 25
Technical
Specification
IQ72xxxQTXxx
Encased Mechanical Drawing
Top View
1.536 ±0.020 (39.01 ±0.5)
1. 030 (26.16)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.150 (3.81)
123
8 7 5 46
2.386
± 0.020
(60.6± 0.5)
2.00
(50.8) 1.86
(47.2)
M3 Threaded Inserts
4 Places See Notes
0.300 (7.62)
0.600 (15.24)
0.500±0.025
(12.7±0.63)
Overall Height
0.263±0.020
(6.68±0.5)
0.253±0.020 (6.4±0.5)
0.18±0.010
(4.57±0.25)
Side View
0.183±.020
(4.65)±0.5
0.468±0.020 (11.89±0.5)
PIN DESIGNATIONS
Pin 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 Vout(–) Negative output voltage
5 SENSE(–) Negative remote sense1
6 TRIM Output voltage trim2
7 SENSE(+) Positive remote sense3
8 Vout(+) Positive output voltage
Notes:
1) SENSE(–) should be connected to Vout(–) either remotely
or at the converter.
2) Leave TRIM pin open for nominal output voltage.
3) SENSE(+) should be connected to Vout(+) either remotely
or at the converter.
NOTES
1)M3 screws used to bolt unit’s baseplate to other surfaces (such as
a heatsink) must not exceed 0.100" (2.54 mm) depth below the
surface of the baseplate.
2)Applied torque per screw should not exceed 6in-lb. (0.7 Nm).
3)Baseplate atness tolerance is 0.004" (.10mm) TIR for surface.
4)Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
5)Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
6)All Pins: Material - Copper Alloy- Finish (RoHS 6/6) - Matte Tin over
Nickel plate
7)Weight: 3.02 oz. (85.7 g) typical
8)All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
9)Workmanship: Meets or exceeds IPC-A-610C Class II
10)Recommended pin length is 0.03” (0.76mm) greater than the PCB
thickness.
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 26
Technical
Specification
IQ72xxxQTXxx
2.200 ±.020 [ 55.88 ±0.5 ]
1.536 ±.020 [ 39.01 ±0.5 ]
.01 [0.2]
OVERALL HEIGHT
.500 ±.025
[12.7 ±0.63]
.18
[ 4.6 ]
SEE NOTE 5 .15 [ 3.8 ]
.30 [ 7.6 ]
.45 [ 11.4 ]
.60 [ 15.2 ]
8
7
6
1
2
3
.30 [ 7.6 ]
.60 [ 15.2 ]
2.386
2.00
[ 50.8 ]
±.020
[ 60.6 ±0.5 ]
BOTTOMSIDE CLEARANCE
±.020 .010
[0.51 0.25]
1.30
[ 33 ]
.70
[ 17.8 ]
.800 ±.020
[ 20.32 ±0.5 ]
2.07
[ ]
.13
[ 3.2 ]
1
.02 [ 0.6 ]
.183 ±.020
[ 4.65 ±0.5 ]
.36
[ 9.1 ]
1.01
[ 25.7 ]
1.66
[ 42.2 ]
TOP VIEW BOTTOM VIEW
52.5
5
4
R .065
1,65[ ]
PIN DESIGNATIONS
Pin 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 Vout(–) Negative output voltage
5 SENSE(–) Negative remote sense1
6 TRIM Output voltage trim2
7 SENSE(+) Positive remote sense3
8 Vout(+) Positive output voltage
Notes:
1) SENSE(–) should be connected to Vout(–) either remotely
or at the converter.
2) Leave TRIM pin open for nominal output voltage.
3) SENSE(+) should be connected to Vout(+) either remotely
or at the converter.
NOTES
1) Applied torque per screw should not exceed 5in-lb.
(3in-lb recommended).
2) Baseplate atness tolerance is 0.01” (.2mm) TIR for surface.
3) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
4) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
5) All Pins: Material - Copper Alloy, Finish (RoHS 6/6) - Matte Tin over
Nickel plate
6) Total Weight: 3.12 oz (88.5 g)
7) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) Recommended pin length is 0.03” (0.76mm) greater than the PCB
thickness.
10) A thermal interface material is required to assure proper heat transfer
from the anged baseplate to the cooling surface. Thermal grease
may be used, or materials such as Thermalloy’s Grafoil or Burgquist’s
HiFlow and Softow. Other similar products are available from many
heatsink manufacturers.
Flanged Mechanical Drawing
Product # IQ72xxxQTXxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005303 Rev. E 5/10/10 Page 27
Technical
Specification
IQ72xxxQTXxx
PART NUMBERING SYSTEM
The part numbering system for SynQor’s dc-dc converters follows the format
shown in the example below.
The first 12 characters comprise the base part number and the last 3
characters indicate available options. The “-G” suffix indicates 6/6 RoHS
compliance.
Application Notes
A variety of application notes and technical white papers can be downloaded
in pdf format from our website.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium, Hexavalent
Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated
Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor
product is 6/6 RoHS compliant. For more information please refer to
SynQor’s RoHS addendum available at our RoHS Compliance / Lead
Free Initiative web page or e-mail us at
rohs@synqor.com
.
ORDERING INFORMATION
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 characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
The following options must be included in place of the
w x y z
spaces in the
model numbers listed above.
Not all combinations make valid part numbers, please contact SynQor for
availability. See the Product Summary web page for more options.
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty
information is listed on our website 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.
Product Family
Package Size
Performance Level
Thermal Design
Output Current
6/6 RoHS
Options (see
Ordering Information)
Input Voltage
Output Voltage
Contact SynQor for further information:
Phone: 978-849-0600
Toll Free: 888-567-9596
Fax: 978-849-0602
E-mail: power@synqor.com
Web:
www.synqor.com
Address: 155 Swanson Road
Boxborough, MA 01719
USA
IQ 72 050 Q T C 25 N R S - G
PATENTS
SynQor holds the following U.S. patents, one or more of which apply to
each product listed in this document. Additional patent applications may
be pending or led in the future.
5,999,417 6,222,742 6,545,890 6,577,109 6,594,159
6,731,520 6,894,468 6,896,526 6,927,987 7,050,309
7,072,190 7,085,146 7,119,524 7,269,034 7,272,021
7,272,023 7,558,083 7,564,702
Ordering Information
Model Number Input
Voltage
Output
Voltage
Max Output
Current
IQ72033QTw30xyz 72V 3.3V 30A
IQ72050QTw25xyz 72V 5V 25A
IQ72070QTw20xyz 72V 7V 20A
IQ72120QTw12xyz 72V 12V 12A
IQ72150QTw10xyz 72V 15V 10A
IQ72240QTw06xyz 72V 24V 6A
IQ72300QTw05xyz 72V 30V 5A
IQ72480QTw03xyz 72V 48V 3A
Options Description: w x y z
Thermal Design Enable
Logic Pin Style Feature
Set
C - Encased
V - Encased with Flange N - Negative
R - 0.180" S - Standard