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002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
DC to DC Converters
Distributed Power Supplies for Systems, Insulation Type
Quarter Brick Type iQB/iQC Series
Power supply systems for infrastructure devices used in communi-
cation networks primarily use brick-type DC to DC converters.
As the voltage used for LSIs continues to drop, power supplies are
expected to provide lower output, higher efficiencies, and lower
noise levels.
To meet these demands, we have developed quarter brick types
that is smaller in size and produce low output voltage.
FEATURES
• Wide input voltage range (DC.36 to 75V or DC.18 to 36V)
• There are 21 models in the lineup of products with low output
voltages (1.2 to 5V).
• High efficiency: 90%(3.3V and 5V output)
• Heat sink is not required.
• Remote ON-OFF function
• Output voltage external variable function
• Remote sensing function
• Various protective functions
• Two shapes: SMD and lead pin types
• Low height power supplies (Height: 8.1mm)
PRODUCT IDENTIFICATION
(1) Type name
Quarter brick type
iQB: Lead pin
iQC: SMD
(2) Rated input voltage
(3) Output current
(4) Output voltage
(5) Option code
iQB type
015: Standard(Negative on/off logic, Pin length: 5.08mm,
Overvoltage protection shutdown type)
000: Positive on/off logic, Pin length: 3.68mm,
Overvoltage protection automatic recovery type
001: Negative on/off logic, Pin length: 3.68mm,
Overvoltage protection automatic recovery type
002: Positive on/off logic, Pin length: 2.79mm,
Overvoltage protection automatic recovery type
003: Negative on/off logic, Pin length: 2.79mm,
Overvoltage protection automatic recovery type
004: Positive on/off logic, Pin length: 5.08mm,
Overvoltage protection automatic recovery type
005: Negative on/off logic, Pin length: 5.08mm,
Overvoltage protection automatic recovery type
011: Negative on/off logic, Pin length: 3.68mm,
Overvoltage protection shutdown type
iQC type
001: Standard(Negative on/off logic)
000: Positive on/off logic
PART NUMBERS AND RATINGS
iQB 48 015A 018V -
(1) (2) (3) (4) (5)
Output voltage(V) Current(A) Part No.
Lead pin type
1.2 25 iQB48025A012V
1.5 25 iQB48025A015V
1.8 15 iQB48015A018V
1.8 25 iQB48025A018V
2.5 10 iQB48010A025V
2.5 20 iQB48020A025V
3.3 10 iQB48010A033V
3.3 20 iQB48020A033V
5 8 iQB48008A050V
5 15 iQB48015A050V
Supports 24V input
3.3 15 iQB24015A033V
SMD type
1.2 25 iQC48025A012V
1.5 25 iQC48025A015V
1.8 15 iQC48015A018V
1.8 25 iQC48025A018V
2.5 10 iQC48010A025V
2.5 20 iQC48020A025V
3.3 10 iQC48010A033V
3.3 20 iQC48020A033V
5 8 iQC48008A050V
5 15 iQC48015A050V
(2/6)
002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
SPECIFICATIONS AND STANDARDS
∗1 Verify the rated current (maximum output current) because this involves derating.
∗2 Applies only to the primary surge. The power supply does not have an input fuse, so make sure to install an external fuse when using this product.
Part No. Lead pin type iQB48025A012V iQB48025A015V iQB48015A018V iQB48025A018V iQB48010A025V iQB48020A025V
SMD iQC48025A012V iQC48025A015V iQC48015A018V iQC48025A018V iQC48010A025V iQC48020A025V
Rated output voltage and current∗11.2V • 25A 1.5V • 25A 1.8V • 15A 1.8V • 25A 2.5V • 10A 2.5V • 20A
Maximum output power W 30 37.5 27 45 25 50
Input conditions
Input voltage Edc V 36 to 75[Continuation]/100[Transient 100ms]
Input current A 4max. 4max. 4max. 4max. 2max. 4max.
Inrush transient∗2A2S 0.2max. 0.2max. 0.2max. 0.2max. 0.2max. 0.2max.
Efficiency % 78typ. 82typ. 85typ. 84typ. 87typ. 86typ.
Output characteristics
Output voltage Edc V 1.2 1.5 1.8 1.8 2.5 2.5
Voltage adjustment range % –10 to +10 –10 to +10 –10 to +10 –10 to +10 –10 to +10 –10 to +10
Maximum output current A 25 25 15 25 10 20
Minimum output current A 2.5 2 1 1.8 0.75 1.5
Output voltage initial setting % ±1.5max. ±2max. ±1.6max. ±1.6max. ±1.6max. ±1.6max.
Overvoltage protection V 1.4 to 1.8 1.7 to 2.3 2.15 to 2.58 2.15 to 2.58 2.7 to 3.5 2.7 to 3.5
Overcurrent protection A 35.0typ. 35.0typ. 22.5typ. 35.0typ. 14.0typ. 26.0typ.
Voltage
stability
Line regulation mV 5max.(2typ.) 5max.(2typ.) 5max.(2typ.) 5max.(2typ.) 5max.(1typ.) 5max.(1typ.)
Load regulation mV 7max.(1typ.) 7max.(1typ.) 7max.(1typ.) 7max.(1typ.) 7max.(1typ.) 7max.(1typ.)
Temperature
regulation mV 50max.(10typ.) 50max.(10typ.) 50max.(10typ.) 50max.(10typ.) 50max.(10typ.) 50max.(10typ.)
Dynamic response mV ±220typ.[50 to 75%, sudden load change]
Ripple noise Ep-p mV 75max. 100max. 100max. 100max. 100max. 100max.
Start up time ms 90typ. 90typ. 90typ. 90typ. 90typ. 90typ.
Auxiliary functions
Overvoltage protection Yes(Shut-down type: Models capable of automatic output voltage recovery are available as an option.)
Overcurrent protection Yes(Automatic recovery)
Alarm output No
Over-temperature protection Yes(Automatic recovery)
Remote ON-OFF Yes
Remote sensing Yes
Parallel operation Impossible
Output voltage adjustment Yes
Master slave operation No
Standards
Safety standards UL60950 and VDE0805 approved. EN60950 approved.
Constructions
External dimensions mm 8.1×36.8×57.9[H×W×L]
Weight g 39typ.
Mounting method Mounted from the terminal side (soldered).
Oscillating method Fixed frequency
Oscillating frequency kHz 300typ. 300typ. 300typ. 300typ. 300typ. 300typ.
(3/6)
002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
SPECIFICATIONS AND STANDARDS
∗1 Verify the rated current (maximum output current) because this involves derating.
∗2 Applies only to the primary surge. The power supply does not have an input fuse, so make sure to install an external fuse when using this product.
Part No. Lead pin type iQB48010A033V iQB48020A033V iQB48008A050V iQB48015A050V iQB24015A033V
SMD iQC48010A033V iQC48020A033V iQC48008A050V iQC48015A050V
Rated output voltage and current∗13.3V • 10A 3.3V • 20A 5.0V • 8A 5.0V • 15A 3.3V • 15A
Maximum output power W 33 66 40 75 49.5
Input conditions
Input voltage Edc V 36 to 75[Continuation]/100[Transient 100ms] 18 to 36
Input current A 2max. 4max. 2max. 4max. 4.25max.
Inrush transient∗2A2S 0.2max. 0.2max. 0.2max. 0.2max. 0.2max.
Efficiency % 90typ. 89typ. 90typ. 90typ. 89typ.
Output characteristics
Output voltage Edc V 3.3 3.3 5 5 5
Voltage adjustment range % –10 to +10 –10 to +10 –10 to +10 –10 to +10 –10 to +10
Maximum output current A 10 20 8 15 15
Minimum output current A 0.75 1.5 0.6 1 1
Output voltage initial setting % ±1.6max. ±1.6max. ±1.6max. ±1.6max. ±1.6max.
Overvoltage protection V 3.75 to 4.4 3.75 to 4.4 5.7 to 6.7 5.7 to 6.7 3.75 to 4.4
Overcurrent protection A 15.0typ. 27.0typ. 11.5typ. 23.0typ. 21.0typ.
Voltage
stability
Line regulation mV 5max.(1typ.) 5max.(1typ.) 10max.(2typ.) 10max.(2typ.) 10max.(2typ.)
Load regulation mV 7max.(1typ.) 7max.(1typ.) 10max.(1typ.) 10max.(1typ.) 10max.(1typ.)
Temperature
regulation mV 60max.(15typ.) 60max.(15typ.) 75max.(30typ.) 75max.(30typ.) 75max.(30typ.)
Dynamic response mV ±220typ.[50 to 75%, sudden load change]
Ripple noise Ep-p mV 100max. 100max. 125max. 125max. 100max.
Start up time ms 90typ. 90typ. 90typ. 90typ. 90typ.
Auxiliary functions
Overvoltage protection Yes(Shut-down type: Models capable of automatic output voltage recovery are available as an option.)
Overcurrent protection Yes(Automatic recovery)
Alarm output No
Over-temperature protection Yes(Automatic recovery)
Remote ON-OFF Yes
Remote sensing Yes
Parallel operation Impossible
Output voltage adjustment Yes
Master slave operation No
Standards
Safety standards UL60950 and VDE0805 approved. EN60950 approved.
Constructions
External dimensions mm 8.1×36.8×57.9[H×W×L]
Weight g 39typ.
Mounting method Mounted from the terminal side (soldered).
Oscillating method Fixed frequency
Oscillating frequency kHz 300typ. 300typ. 300typ. 300typ. 300typ.
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002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
IQB TYPE
SHAPES AND DIMENSIONS
TERMINAL DESIGNATIONS AND FUNCTIONS
IQC TYPE
SHAPES AND DIMENSIONS
TERMINAL DESIGNATIONS AND FUNCTIONS
1 +Vin DC input terminal (+)
2 On/Off The output can be turned on/off externally.
3 –Vin DC input terminal (–)
4 –Vout DC output terminal (–)
5 –Sense Remote sensing terminal (–)
6 Trim The output voltage can be varied by an external resistor.
7 +Sense Remote sensing terminal (+)
8 +Vout DC output terminal (+)
57.91±0.38
50.803.6
36.83±0.38
15.24
7.628.81max.3.68
ø1.02 pins
ø2.03 stand-offs
3 pins
ø1.57 pins
ø2.59 stand-offs
2 pins
ø1.02 pins
ø2.03 stand-offs
3 pins
10.8
15.24
3.81
7.62
11.43
Bottom view
50.80
15.24
7.62
10.8
15.24
3.81
7.62
11.43
3.6
8
7
6
5
4
1
2
3
Dimensions in mm
Top view
1 +Vin DC input terminal (+)
2 On/Off The output can be turned on/off externally.
3–Vin DC input terminal (–)
4–Vout DC output terminal (–)
5–Sense Remote sensing terminal (–)
6 Trim The output voltage can be varied by an external resistor.
7 +Sense Remote sensing terminal (+)
8 +Vout DC output terminal (+)
57.91±0.38
55.521.2
15.24
7.62
36.83±0.38
8.0∗1
8.4∗2
ø1.91
10.8
15.24
3.81
7.62
11.43
58.5
∗1 Overall height after customer's reflow
∗2 Overall height before customer's reflow
Bottom view
Top view
55.52
15.24
7.62
10.8
15.24
3.81
7.62
11.43
1.2
8
7
6
5
4
1
2
3
Dimensions in mm
Top view
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002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
OUTPUT POWER-AMBIENT TEMPERATURE (DERATING)
MAXIMUM OUTPUT CURRENT vs. AMBIENT TEMPERATURE(Ta)
iQB48025A012V/iQC48025A012V iQB48025A015V/iQC48025A015V
Wind direction: Worst orientaion, Vin=48V Wind direction: Worst orientaion, Vin=48V
(From 1 pin to 3 pin) (From 1 pin to 3 pin)
iQB48015A018V/iQC48015A018V iQB48025A018V/iQC48025A018V
Wind direction: Worst orientaion, Vin=48V Wind direction: Worst orientaion, Vin=48V
(From 1 pin to 3 pin) (From 1 pin to 3 pin)
iQB48010A025V/iQC48010A025V iQB48020A025V/iQC48020A025V
Wind direction: Worst orientaion, Vin=48V Wind direction: Worst orientaion, Vin=48V
(From 1 pin to 3 pin) (From output to input)
25 35 45 55 65 75 85 95 105 115 125
5
10
15
20
25
30
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
25 35 45 55 65 75 85 95 105 115 125
5
10
15
20
25
30
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
35 45 55 65 75 85 95 105 115
5
7
9
11
13
15
17
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
25 35 45 55 65 75 85 95 105 115 125
5
10
15
20
25
30
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
60 70 80 90 100 110
3
4
5
6
7
8
9
10
11
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
20 30 40 50 60 70 80 90 100 110 120
5
10
15
20
25
Output current(A)
Ambient temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
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002-02 / 20040524 / ea33_br_iqbc.fm
• All specifications are subject to change without notice.
OUTPUT POWER-AMBIENT TEMPERATURE (DERATING)
MAXIMUM OUTPUT CURRENT vs. AMBIENT TEMPERATURE(Ta)
iQB48010A033V/iQC48010A033V iQB48020A033V/iQC48020A033V
Wind direction: Worst orientaion, Vin=48V Wind direction: Worst orientaion, Vin=48V
(From 1 pin to 3 pin) (From output to input)
iQB48008A050V/iQC48008A050V iQB48015A050V/iQC48015A050V
Wind direction: Best orientaion, Vin=48V Wind direction: Worst orientaion, Vin=48V
(From 3 pin to 1 pin) (From 1 pin to 3 pin)
Tc TEMPERATURE MEASUREMENT POINT AND WIND
DIRECTION
NC: Natural cooling=0.3m/s(60LFM)
COMMON SPECIFICATIONS
60 70 80 90 100 110
3
4
5
6
7
8
9
10
11
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
20 30 40 50 60 70 80 90 100 110 120
5
10
15
20
25
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
30 40 50 60 70 80 90 100 110 120
4
5
6
7
8
9
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
30 40 50 60 70 80 90 100 110
5
6
7
8
9
10
11
12
13
14
15
16
Output current(A)
Temperature(˚C)
NC
0.5m/s(100LFM)
1.0m/s(200LFM)
2.0m/s(400LFM)
3.0m/s(600LFM)
Tc, thermal limit
Temperature and humidity
Temperature range Operating(°C) –40 to +120[Temperature at the measurement point in the above drawing]
Storage(°C) –55 to +125[Ambient temperature of the power supply]
Humidity range Operating(%)RH 10 to 85[Without dewing]
Storage(%)RH
Vibration and shock
Vibration 5 to 10Hz Acceleration: 0.5G
10 to 200Hz Acceleration: 1.5G
Shock Acceleration 50G[Half sine wave, 3 directions]
Pulse duration 6ms
Withstand voltage
Withstand voltage Input terminal to output terminal DC.1.5kV[1min, Normal temperature, normal humidity, cutout current 10mA]
Best orientation
airflow
Thermal measurement
location
