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MPM-925C
250W PS/2 Power Supply

Datasheet

Specifications
Input Voltage:
90~264VAC
Input Frequency:
47~63Hz
Inrush Current:
The maximum inrush current will not exceed 30A at 115VAC or 60A at 230VAC input, cold start, 25°C
Load Range:
At factory, all outputs at 60% rated load condition; the +5V output is set to between 4.9~5.1V. The other outputs are checked to be within the specified voltage accuracy range.
Ripple and Noise:
The peak to peak ripple and noise for each output is less than 1% of each output voltage at rated load, 115/230VAC. Measuring is done by 15MHz bandwidth limited oscilloscope and terminated each output with a 47μF capacitor
Line Regulation:
The line regulation for +12V is less than +/-2%, for other output is less than +/-1% while measuring at rated load and +/-10% of nominal line input voltage changing
Load Regulation:
The output voltage load regulation is less than the values in the following table by changing each output loading +/-40% from 60% rated load, and keep all other outputs at 60% rated load
Hold Up Time:
Hold up time is 14ms typical by measuring from the last AC line charging pulse to the point that +5V drop down to +4.75V at rated load
Output Power:
The total DC continuous power shall be kept within 200W
Power Good Signal:
When power start up, the power good signal will increase 100ms to 500ms after all output DC voltages are within regulation limits
Power Fail Signal:
The power fail signal will fall at least 1ms before any of the output voltages lower than the regulation limits
Efficiency:
The efficiency is 65% typical by measuring at nominal line, and full rated load
Protection:
For some reason the power supply fails to control itself, the build-in over voltage protection circuit will shut down the outputs to prevent damaging external circuits. The trip point of crowbar circuit is around 5.7V to 7V. The power supply will go into hiccup mode against shout circuit or over load conditions, and will auto-recovery while faulty conditions are removed
Temperature:
Operating: 0°~40°C
Storage: -40°~+75°C
Connectors:
AC Input: Meet IEC 320/CEE 22 standard
DC Output: Meet IEC 320 (reverse type)
CPU Board: Burndy GTC 6P-1 or equivalent
Disk Driver: AMP 1-480424-0 or equivalent
3.5" Floppy Drive: AMP 171822-4 or equivalent
AC Switch: Push switch (lever: 20mm)
Dimensions:
15.0 x 14.0 x 8.62 cm. Tolerance specified is +/-0.4mm between mounting holes and +/-0.8mm for other dimensions

Safety Standards
Safety:
UL 544, UL 2601-1
CSA 22.2 No.601
TUV (DIN VDE 075T, 1/12.91/EN 60 601-1: 1990)
GND Leakage Current:
It should be less 500uA at 244VAC input
EMI:
EN 55011 class"B"
Immunity:
IEC-801-2 4KV contact, 8KV air discharge
IEC-801-3 3V/M, 26MHz to 1GH
IEC-801-4 2KV power mains

Output Voltage
Min. Load
Rated Load
Peak Load
Voltage Accuracy
+5V
4A
22A
28A
4.9~5.1V
+12V
1A
7A
10A
11.28~12.72V
-12V
0A
0.5A
1A
-11.4~-12.6V
-5V
0A
0.5A
1A
-4.75~-5.25V



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