FEATURES

ENVIRONMENTAL

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Isolated between input and output

　

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Operating temperature   -40℃~+60℃

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Super high power density



　

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Out-Derating 1) …  0℃ ~ +50℃ (100% Load)
　

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Super-High efficiency




　

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Out-Derating 1) … -25℃ ~ +70℃ (70% Load)
　

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High wattage output




　

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Storage temperature range …  -40℃~+105℃

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Wide input voltage range



　

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Operating humidity (non condensing) …  20%~80%

　









　

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Storage humidity (non condensing) …   10%~95%

　









　

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Cooling method …   Conduction & airflow

　
　
　
　
　
　
　
　
　
　
　

　
The DC-DC module temperature should be kept below 50℃ for high reliability, and must be kept below 70℃.













　

PHYSICAL

　

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Dimension … L110 x W60 x H23mm

　

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Shielding … None




　

　

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PCB Material : FR-4
　
　
　
　
　

　


























ELECTRICAL SPECIFICATIONS

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Input(Vdc)
　
　
　
　
　
　
　
　
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Output(Vdc)
　
　
　
　
　
　
　
　

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Rated Input Voltage : +72VDC




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Output Voltage  … +12VDC




　

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Input Voltage Range : 50V~90VDC



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Output Voltage range … ±3% of nornimal
　

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Input Currnet : 0.4A at 72Vin




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Output Current  … 2.5A




　

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Efficiency : typ.82% at 72VDC input



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Vout tolerance … ±3%





　

　











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Line regulation… ±1% of Vout



　

　











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Load regulation… ±3% of Vout



　

　











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Ripple and noise … 120mV




　

　











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Over current protection…110%~150% of Iout-max.

　














　













　













　
　
　
　
　
　
　
　
　
　
　
　
　


























DC-DC Power Module Guide


























Model name
V-input
Input Range
Output
Ripple&
Vout
Eff(%)
Line/Load

Voltage
Current
Wattage
Noise②
Tol.
Regulation③

 WJP-1228A 
DC72V
DC50∼90V
12V
2.5A
30W
120mV
±3%
typ.82%
±1%


① Typical, at TA = +25℃ under normal line voltage and full-load conditions, unless otherwise noted.
② Ripple&Noise(R/N) are measured over a 20MHz bandwidth. 
③ Load-Regulation: 10% to 100% load.