SSI
ERP2U Power Supply Design Guide, V2.31
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Required
The power supply shall be stable and meet all requirements, except dynamic loading requirements, with the
following capacitive loading ranges.
Note: Up to 10,000 μF of the +12V capacitive loading may be on the +12V1 output.
Table 22: Capacitve Loading Conditions
Output MIN MAX Units
+3.3 V 10 12,000 μF
+5 V 10 12,000 μF
+12 V 10 11,000 μF
-12 V 1 350 μF
+5 VSB 1 350 μF
6.8 Ripple / Noise STATUS
Required
The maximum allowed ripple/noise output of the power supply is defined in Table 24. This is measured over a
bandwidth of 0 Hz to 20 MHz at the power supply output connectors. A 10 μF tantalum capacitor in parallel with a
0.1 μF ceramic capacitor are placed at the point of measurement.
Table 23: Ripple and Noise
+3.3 V +5 V +12 V -12 V +5 VSB
50 mVp-p 50 mVp-p 120 mVp-p 120 mVp-p 50 mVp-p