Technical
Specification
IQ48xxxSKCxx
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 1
CONTENTS
Page No.
IQ48 Family Electrical Characteristics (all output voltages) . . . . . . . . . . 2
IQ48-SKC Family Figures (all output voltages) . . . . . . . . . . . . . . . . . . . 3
IQ48012SKC20 Electrical Characteristics (1.2 Vout) . . . . . . . . . . . . . . 4-5
IQ48015SKC14 Electrical Characteristics (1.5 Vout) . . . . . . . . . . . . . . 6-7
IQ48018SKC14 Electrical Characteristics (1.8 Vout) . . . . . . . . . . . . . . 8-9
IQ48025SKC10 Electrical Characteristics (2.5 Vout) . . . . . . . . . . . . 10-11
IQ48033SKC08 Electrical Characteristics (3.3 Vout) . . . . . . . . . . . . 12-13
IQ48050SKC05 Electrical Characteristics (5.0 Vout) . . . . . . . . . . . . 14-15
IQ48070SKC04 Electrical Characteristics (7.0 Vout) . . . . . . . . . . . . 16-17
IQ48120SKC02 Electrical Characteristics (12.0 Vout). . . . . . . . . . . . 18-19
IQ48150SKC02 Electrical Characteristics (15.0 Vout). . . . . . . . . . . . 20-21
Application Section ...................................22-25
IQ48-SKC Family Standards & Qualification Testing . . . . . . . . . . . . . . .26
Mechanical Drawing......................................27
Ordering Information.....................................28
34-75 V 100V 1.2-15 V 26W 2250 Vdc Sixteenth-brick
Continuous Input Transient Input Outputs Max Power Isolation DC-DC Converter
The InQor® Sixteenth-brick converter series is
composed of next-generation, board-mountable,
isolated, fixed switching frequency dc-dc converters
that use synchronous rectification to achieve
extremely high power conversion efficiency. 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, 86% at full load
• Delivers full power with minimal derating - no heatsink required
• Operating input voltage range: 34-75 V dc
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
Mechanical Features
• Industry standard Sixteenth-brick pin-out conguration
• Size: 1.04" x 1.44" x 0.500" (26.3 x 36.5 x 12.7 mm)
• Total weight:1.14 oz (32.3 g)
Control Features
• On/Off control referenced to input side
• Remote sense for the output voltage
• Output voltage trim range of -10%, +10%
Safety Features
• 2250 V input-to-output isolation
• UL 60950-1:2003 Basic Insulation rating
• CAN/CSA-C22.2 No. 60950-1:2003
• EN60950-1:2001 Certied by TUV
• RoHS compliant (see last page)
Protection Features
• Input under-voltage lockout
• Output current limit and short circuit protection
• Active back bias limit
• Output over-voltage protection
• Thermal shutdown
IQ48150SKC02NRS-G
34-75 V
IN
1.2-15 V
OUT
@ 1.7-20 A
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 2
IQ48 Family Electrical Characteristics (all output voltages)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating 100 V Continuous
Operating 75 V Continuous
Operating Transient Protection 100 V 100 ms
Isolation Voltage
Input to Output 2250 V dc
Input to Base-Plate 2250 V dc
Output to Base-Plate 2250 V dc
Operating Temperature -40 100 °C Baseplate temperature
Storage Temperature -55 125 °C
Voltage at ON/OFF input pin -2 8 V
INPUT CHARACTERISTICS
Operating Input Voltage Range 34 48 75 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold 31.2 32.5 33.8 V
Turn-Off Voltage Threshold 28.9 30.5 32.2 V
Lockout Voltage Hysteresis 2.0 V
Recommended External Input Capacitance 100 µF Typical ESR 0.1-0.2 Ω
Input Filter Component Values (L\C) 1.0\2.35 µH\µF Internal values; see Figure E
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time 28 ms Full load, Vout=90% nom.
Start-Up Inhibit Time 180 200 250 ms Figure F; See Note 2
Output Voltage Overshoot 0 % Maximum Output Capacitance
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength) See Absolute Maximum Ratings
Isolation Resistance 30 MΩ
Isolation Capacitance (input to output) 1000 pF See Note 1
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 350 kHz
ON/OFF Control
Off-State Voltage 2.4 8 V
On-State Voltage -2 0.8
ON/OFF Control Application notes Figures A & B
Pull-Up Voltage 5 V
Pull-Up Resistance 10 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 TBD 106 Hrs. 80% load, 200LFM, 40 °C Ta
Calculated MTBF (MIL-217) MIL-HDBK-217F TBD 106 Hrs. 80% load, 200LFM, 40 °C Ta
Field Demonstrated MTBF 106 Hrs. See our website for details
Note 1: Higher values of isolation capacitance can be added external to the module.
Note 2: Maximum value is 400ms for DC current limit and short circuit fault conditions
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 3
100.0
1,000.0
10,000.0
100,000.0
0 1 2 3 4 5 6 7 8 9 10
Increase in Vout (%)
Trim Resistance (kOhms)
5 V 7 V 12 V 15 V
% Decrease in Vout
10.0
100.0
1,000.0
10,000.0
012345678910
Trim Resistance (kOhms)
% Decrease in Vout (All voltages)
Increase in Vout (%)
Trim Resistance (kOhms)
1.2 V 1.5 V 1.8 V 2.5 V 3.3 V
IQ48-SKC 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: Trim graph for trim-up 1.2 to 3.3V outputs.
Common Figure 3: Trim graph for trim-up 5 to 15V outputs. Common Figure 4: Trim graph for trim down.
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 4
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.2 V
20 A
IQ48012SKC20
IQ48012SKC20 Electrical Characteristics (1.2 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 300 380 mA
Disabled Input Current 2 3 mA
Response to Input Transient 0.06 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 240 mA RMS
Recommended Input Fuse 20 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 1.188 1.2 1.212 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -18 18 mV
Total Output Voltage Range 1.170 1.230 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 40 80 mV Full load
RMS 10 20 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
Back-Drive Current Limit while Enabled 1.2 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 60 mV 50% to 75% to 50% Iout max
Settling Time 100 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 0.0 1.6 1.8 V Over full temp range
EFFICIENCY
100% Load 79 % See Figure 1 for efciency curve
50% Load 78 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 5
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.2 V
20 A
IQ48012SKC20
34-75 V
1.2 V
20 A
IQ48012SKC20
0
2
4
6
8
10
12
0 5 10 15 20
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
0 5 10 15 20
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-66%
of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF tantalum cap and 1µF ceramic cap.
Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).
Figure 6: Output voltage response to step-change in input voltage (72V to 100V), at
20A load current. Load cap: 15µF tantalum capacitor and 1uF ceramic cap. Ch 1:
Vout (100mV/div), Ch 2: Vin (50V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 6
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.5 V
14 A
IQ48015SKC14
IQ48015SKC14 Electrical Characteristics (1.5 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.0 A Vin min; trim up; in current limit
No-Load Input Current 48 60 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.05 V 1000 V/ms; see Figure 6
Input Terminal Ripple Current 35 mA RMS
Recommended Input Fuse 20 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 1.485 1.5 1.515 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -23 23 mV
Total Output Voltage Range 1.463 1.538 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 25 50 mV Full load
RMS 6 10 mV Full load
Operating Output Current Range 0 14 A Subject to thermal derating
Output DC Current-Limit Inception 15.4 16.8 18.2 A Output voltage 10% Low
Back-Drive Current Limit while Enabled 1.5 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 80 mV 50% to 75% to 50% Iout max
Settling Time 40 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 0.0 1.9 2.1 V Over full temp range
EFFICIENCY
100% Load 83 % See Figure 1 for efciency curve
50% Load 79 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 7
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.5 V
14 A
IQ48015SKC14
34-75 V
1.5 V
14 A
IQ48015SKC16
0
2
4
6
8
10
12
0 5 10 15 20
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
-1 4 9 14
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0
2
4
6
8
10
12
14
16
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
16
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-66%
of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF tantalum cap and 1µF ceramic cap.
Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).
Figure 6: Output voltage response to step-change in input voltage (72V to 100V), at
14A load current. Load cap: 15µF tantalum capacitor and 1uF ceramic cap. Ch 1:
Vout (100mV/div), Ch 2: Vin (50V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 8
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.8 V
14 A
IQ48018SKC14
IQ48018SKC14 Electrical Characteristics (1.8 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 55 69 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.05 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 35 mA RMS
Recommended Input Fuse 20 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 1.782 1.8 1.818 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -27 27 mV
Total Output Voltage Range 1.755 1.845 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 30 60 mV Full load
RMS 6 10 mV Full load
Operating Output Current Range 0 14 A Subject to thermal derating
Output DC Current-Limit Inception 15.4 16.8 18.2 A Output voltage 10% Low
Back-Drive Current Limit while Enabled 1.9 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 70 mV 50% to 75% to 50% Iout max
Settling Time 40 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 2.1 2.2 2.3 V Over full temp range
EFFICIENCY
100% Load 84 % See Figure 1 for efciency curve
50% Load 81 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 9
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
1.8 V
14 A
IQ48018SKC14
34-75 V
1.8 V
14 A
IQ48018SKC14
0
2
4
6
8
10
12
-1 4 9 14
Load Current (A)
Power Dissipation (W)
36Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
-1 4 9 14
Load Current (A)
Efficiency (%)
36Vin
48 Vin
75 Vin
0
2
4
6
8
10
12
14
16
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
16
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-66%
of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF tantalum cap and 1µF ceramic cap.
Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).
Figure 6: Output voltage response to step-change in input voltage (72V to 100V), at
14A load current. Load cap: 15µF tantalum capacitor and 1uF ceramic cap. Ch 1:
Vout (100mV/div), Ch 2: Vin (50V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 10
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
2.5 V
10 A
IQ48025SKC10
IQ48025SKC10 Electrical Characteristics (2.5 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 50 60 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.05 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 60 mA RMS
Recommended Input Fuse 20 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 2.475 2.5 2.525 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -38 38 mV
Total Output Voltage Range 2.438 2.563 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 25 50 mV Full load
RMS 5 10 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
Back-Drive Current Limit while Enabled 2.4 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 300 mV 50% to 75% to 50% Iout max
Settling Time 100 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 2.9 3.1 3.2 V Over full temp range
EFFICIENCY
100% Load 84
50% Load 80 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev.B 5/10/10 Page 11
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
2.5 V
10 A
IQ48025SKC10
0
2
4
6
8
10
12
0 2 4 6 8 10
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
0 2 4 6 8 10
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
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)
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-66%
of Iout(max); dI/dt = 0.08 A/μs). Load cap: 1 μF ceramic capacitor. Ch 1: Vout (2 V/
div), Ch 2: Iout (2.5 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (500 mV/div), Ch 2:
Vin (50 V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 12
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
3.3 V
8 A
IQ48033SKC08
IQ48033SKC08 Electrical Characteristics (3.3 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 50 60 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.05 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 40 mA RMS
Recommended Input Fuse 20 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 35 70 mV Full load
RMS 6 10 mV Full load
Operating Output Current Range 0 8 A Subject to thermal derating
Output DC Current-Limit Inception 9.0 10.0 11.0 A
Back-Drive Current Limit while Enabled 3.5 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 10,000 µF Vout nominal at full load (resistive load); See Note 2
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 100 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 3.9 4.2 4.6 V Over full temp range
EFFICIENCY
100% Load 86
50% Load 83 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 13
Technical Specification
34-75 V
3.3 V
8 A
IQ48033SKC08
Input:
Output:
Current:
Part No.:
34-75 V
3.3 V
8 A
IQ48033SKC08
0
2
4
6
8
10
-1.0 0.5 2.0 3.5 5.0 6.5 8.0
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
-1.0 0.5 2.0 3.5 5.0 6.5 8.0
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0
1
2
3
4
5
6
7
8
9
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
8
9
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-
66% of Iout(max); dI/dt = 0.2 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout (200 mV/div), Ch 2: Iout (10 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (200 mV/div), Ch 2:
Vin (50 V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 14
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
5.0 V
5 A
IQ48050SKC05
IQ48050SKC05 Electrical Characteristics (5.0 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 50 60 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.05 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 40 mA RMS
Recommended Input Fuse 20 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 20 40 mV Full load
RMS 5 10 mV Full load
Operating Output Current Range 0 5 A Subject to thermal derating
Output DC Current-Limit Inception 5.5 6.0 7.0 A Output voltage 10% Low
Back-Drive Current Limit while Enabled 2.4 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 5,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 275 mV 50% to 75% to 50% Iout max
Settling Time 100 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10.0 % Across Pins 8&4
Output Over-Voltage Protection 5.9 6 6.8 V Over full temp range
EFFICIENCY
100% Load 86
50% Load 81 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22 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: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 15
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
5.0 V
5 A
IQ48050SKC05
34-75 V
5.0 V
5 A
IQ48050SKC05
0
2
4
6
8
10
12
0 1 2 3 4 5
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0
1
2
3
4
5
6
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
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-
66% of Iout(max); dI/dt = 0.1 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout (500 mV/div), Ch 2: Iout (5 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (200 mV/div), Ch 2:
Vin (50 V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 16
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
7.0 V
4.0 A
IQ48070SKC04
IQ48070SKC04 Electrical Characteristics (7.0 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current #DIV/0! A Vin min; trim up; in current limit
No-Load Input Current 50 60 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.09 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 30 mA RMS
Recommended Input Fuse 20 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 25 50 mV Full load
RMS 5 10 mV Full load
Operating Output Current Range 0 4 A Subject to thermal derating
Output DC Current-Limit Inception 4.4 4.8 5.2 A Output voltage 10% Low
Back-Drive Current Limit while Enabled 1.8 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 4,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 300 mV 50% to 75% to 50% Iout max
Settling Time 150 µs Across Pins 8&4; Common Figures 3-5
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
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 81 % See Figure 1 for efciency curve
50% Load 81 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22uF tantalum low-ESR capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 17
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
7.0 V
4.0 A
IQ48070SKC04
34-75 V
7.0 V
4.0 A
IQ48070SKC04
0
2
4
6
8
10
12
-0.5 0.5 1.5 2.5 3.5
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
-0.5 0.5 1.5 2.5 3.5
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
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
1
1
2
2
3
3
4
4
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-
66% of Iout(max); dI/dt = 0.1 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout (500 mV/div), Ch 2: Iout (10 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (200 mV/div), Ch 2:
Vin (50 V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 18
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
12 V
2.0 A
IQ48120SKC02
IQ48120SKC02 Electrical Characteristics (12.0 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.1 A Vin min; trim up; in current limit
No-Load Input Current 60 80 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.09 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 45 mA RMS
Recommended Input Fuse 20 A Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point 11.88 12 12.12 V
Output Voltage Regulation
Over Line ±0.1 ±0.3 %
Over Load ±0.1 ±0.3 %
Over Temperature -180 180 mV
Total Output Voltage Range 11.700 12.300 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 50 100 mV Full load
RMS 10 20 mV Full load
Operating Output Current Range 0 2 A Subject to thermal derating
Output DC Current-Limit Inception 2.2 2.4 2.6 A Output voltage 10% Low
Back-Drive Current Limit while Enabled 2.5 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 3,000 µF Vout nominal at full load (resistive load); See Note 2
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs) 200 mV 50% to 75% to 50% Iout max
Settling Time 150 µs Across Pins 8&4; Common Figures 3-5
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
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 86
100% Load 81 % See Figure 1 for efciency curve
50% Load 81 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22uF tantalum low-ESR capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 19
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
12 V
2.0 A
IQ48120SKC02
0
1
2
3
4
5
6
7
8
9
10
012
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
012
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0
1
2
3
4
5
6
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
1
2
2
3
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: Efficiency 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 airflow rates of 100 LFM through 400 LFM. Air flows across the
converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-
66% of Iout(max); dI/dt = 0.1 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout (500 mV/div), Ch 2: Iout (5 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (200 mV/div), Ch 2:
Vin (50 V/div).
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 20
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
15 V
1.7 A
IQ48150SKC02
IQ48150SKC02 Electrical Characteristics (15.0 Vout)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
INPUT CHARACTERISTICS
Maximum Input Current 1.2 A Vin min; trim up; in current limit
No-Load Input Current 75 90 mA
Disabled Input Current 10 14 mA
Response to Input Transient 0.09 V 500 V/ms; see Figure 6
Input Terminal Ripple Current 40 mA RMS
Recommended Input Fuse 20 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 14.625 15.375 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1
Peak-to-Peak 0 60 120 mV Full load
RMS 12 35 mV Full load
Operating Output Current Range 0 1.7 A Subject to thermal derating
Output DC Current-Limit Inception 1.8 2.1 2.5 A
Back-Drive Current Limit while Enabled 3 A Negative current drawn from output
Back-Drive Current Limit while Disabled 2 mA Negative current drawn from output
Maximum Output Capacitance 1,200 µF Vout nominal at full load (resistive load); See Note 2
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 100 µs To within 1% Vout nom
Output Voltage Trim Range -10 10 % Across Pins 8&4; Common Figures 3-5; see Note 3
Output Voltage Remote Sense Range 10 % Across Pins 8&4
Output Over-Voltage Protection 18.0 18.5 20.5 V Over full temp range
EFFICIENCY
100% Load 84 % See Figure 1 for efciency curve
50% Load 75 % See Figure 1 for efciency curve
Note 1: Output is terminated with 1 µF ceramic and 22uF tantalum low-ESR capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Minimum recommended output capacitance is 100uF
Note 3: Trim-up range is limited below 10% at low line and full load, consult SynQor applications support for more detail (e-mail: support@synqor.com)
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 21
Technical Specification
Input:
Output:
Current:
Part No.:
34-75 V
15 V
1.7 A
IQ48150SKC02
0
1
2
3
4
5
6
7
8
9
-0.3 0.2 0.7 1.2 1.7
Load Current (A)
Power Dissipation (W)
34 Vin
48 Vin
75 Vin
60
65
70
75
80
85
90
95
100
-0.3 0.2 0.7 1.2 1.7
Load Current (A)
Efficiency (%)
34 Vin
48 Vin
75 Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
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
0
1
1
1
1
1
2
2
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 pin 3 to pin 1 (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 pin 3 to pin 1 (nominal input voltage).
Figure 5: Output voltage response to step-change in load current (66%-100%-
66% of Iout(max); dI/dt = 0.1 A/μs). Load cap: 1 μF ceramic and 15 μF tantalum
capacitors. Ch 1: Vout (200 mV/div), Ch 2: Iout (5 A/div).
Figure 6: Output voltage response to step-change in input voltage (1000 V/ms).
Load cap: 100 μF, electrolytic output capacitance. Ch 1: Vout (500 mV/div), Ch
2: Vin (50 V/div).
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 22
Application Section
BASIC OPERATION AND FEATURES
This converter switches 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 uses 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.
Figure B: Internal ON/OFF pin circuitry
Figure A: Various circuits for driving the ON/OFF pin.
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(_)
TTL
5V
50k
10k
ON/OFF
Vin(_)
1000pF
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 23
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
Graphs on Page 3 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
at http://www.synqor.com/support-technical-documents.html.
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 : If the output current exceeds the
Output Current Limit threshold, 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%)
1.225*D%D%
)
=
(
_
* For 1.2Vout unit replace 1.225 with 0.6
See Trim Up Graph Common Figure 2 on page 5.
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 24
Vin External
Input
Filter Trim
Vin(+)
Iload
Cload
Vout(+)
Rtrim-up
or
Rtrim-down
Vsense(+)
ON/OFF
Vin(_)Vout(_)
Vsense(_)
Electrolytic
Capacitor
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 website which
provides an understanding of why this instability arises, and
shows the preferred solution for correcting it.
Application Circuits: Figure D provides a typical circuit
diagram which details the input filtering and voltage trimming.
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Figure E: Internal Input Filter Diagram (component values
listed on the specifications page).
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 on the
Electrical
Characteristics page.
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 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
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
L
Vin(+)
Vin(_)
C
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 25
Application Section
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,
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, Figures 3 and 4 provide Power derating curves
for an encased converter without a heatsink and with a typical
1/4" high heatsink.
Figure F: 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)
t0t1t2t
35ms (typical
turn on time)
ON ON ON
OFF OFF
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 26
IQ48-SKC Family Standards & Qualification Testing
Parameter Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2003 Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001 Certied by TUV
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 official safety certificates 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 and y axis, 1 drop in 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
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 27
1.036±.020 (26.31±0.5)
.150 (3.81)
.600 (15.24)
.450 (11.43)
.300 (7.62)
.600 (15.24)
.300 (7.62)
.218±.020
(5.54±0.5)
Overall height
0.500±.025
(12.7±0.63)
Side View
0.18
(4.6)
.143±.020
(3.63±0.5)
1.436±.020
(36.47±0.5)
1.10
(27.9)
Top View
45678
1 2 3
Mechanical Drawing
Mechanical Drawing
NOTES
1) Pins 1-3, are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
2) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54
mm) diameter standoff shoulders.
3) Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy- Finish - Matte Tin over Nickel
plate
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x
+/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 1.14 oz (32.3 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance greater than 0.04”
(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 core shown at left above
is considered part of the input/primary circuit and that the two
ferrite cores shown at the right above are considered part of the
output/secondary circuit.
PIN DESIGNATIONS
Pin Name Function
1Vin(+) Positive input voltage
2ON/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 sense (see note 1)
6TRIM Output voltage trim (see note 2)
7SENSE(+) Positive remote sense (see note 3)
8Vout(+) 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.
Technical
Specification
IQ48-SKC Family
Product # IQ48xxxSKCxx Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005180 Rev. B 5/10/10 Page 28
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
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.
PATENTS
SynQor holds the following U.S. patents, one or more of which
apply to this product. 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
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 48 012 S K C 20 N R S - G
Options Description: w x y z
Thermal Design Enable Logic Pin Style Feature Set
C - Encased N - Negative R - 0.180" S - Standard
Model Number Input
Voltage Output
Voltage Max Output
Current
IQ48012SKw20xyz 34-75 V 1.2 V 20A
IQ48015SKw14xyz 34-75 V 1.5 V 14A
IQ48018SKw14xyz 34-75 V 1.8 V 14A
IQ48025SKw10xyz 34-75 V 2.5 V 10A
IQ48033SKw08xyz 34-75 V 3.3 V 8A
IQ48050SKw05xyz 34-75 V 5.0 V 5A
IQ48070SKw04xyz 34-75 V 7.0 V 3.5A
IQ48120SKw02xyz 34-75 V 12 V 2A
IQ48150SKw02xyz 34-75 V 15 V 1.7A