SSI America EPS2U - Manual (Page 20)

SSI
EPS2U Power Supply Design Guide, V2.1
6.6 Dynamic 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
Rate
Capacitive Load
+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
6.7 Capacitive 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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