SSI America EPS2U manual Dynamic Loading, Capacitive Loading, Transient Load Requirements

SSI

EPS2U Power Supply Design Guide, V2.1

6.6Dynamic Loading

STATUS

Required

The output voltages shall remain within the limits specified in Table 18 for the step loading and within the limits specified in Table 20 for the capacitive loading. The load transient repetition rate shall be tested between 50 Hz and 5 kHz at duty cycles ranging from 10%-90%. The load transient repetition rate is only a test specification. The ∆ step load may occur anywhere within the MIN load to the MAX load shown in Table 14, Table 15, Table 16, or Table 17.

Table 20: Transient Load Requirements

Output	∆ Step Load Size	Load Slew	Capacitive Load
		Rate
+3.3 V	30% of max load	0.5 A/µs	1000 µF
+5 V	30% of max load	0.5 A/µs	1000 µF
12V1+12V2+12V3+12V4	65% of max load	0.5 A/µs	2200 µF
+5 VSB	25% of max load	0.5 A/µs	1 µF

6.7Capacitive Loading

STATUS

Required

The power supply shall be stable and meet all 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 21: 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

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