March Products 120 III (PC620) user manual Power Supply, Nominal Regulation Ripple & Noise Min Max

User Manual version 2503

G: Power Supply

The AC power supply used in the LIBRA 120 III is a 180 watts, 1U ATX power supply, FSP180-50PLA.

G-1. ELECTRICAL REQUIREMENT

G-1-1: OUTPUT RATING

Nominal	Regulation	Ripple & Noise	Min	Max
+3.3V	+/- 5%	50mV	0.3A	16.8A
+5V	+/- 5%	50mV	0.3A	12.0A
+12V	+/- 5%	120mV	1.5A	10.0A
-12V	+/- 10%	120mV	0.0A	0.8A
+5VSB	+/- 5%	50mV	0.0A	2.0A

*-12V, +3.3V, +5V, +12V will have the regulation to +/-10% when all load take off.

*The +3.3V and +5V total output shall not exceed 61 watts. The +3.3V, +5V and +12V total output shall not exceed 165 watts. Ripple and noise measurements shall be made under all specified conditions through a single pole low pass filter with 20MHz cutoff frequency.

G-1-2:HOLD-UP TIME (@FULL LOAD)

u115V/60Hz: 17 msec min.

u230V/50Hz: 17 msec min.

G-1-3: OUTPUT RISE TIME

u115V-rms or 230V-rms +5VDC 20ms min.

6-122 LIBRA 120 III (PC620 Intel 815E)

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