Publicité
Duty Cycle Test Criteria for a 750W PSU – RMS
Duty Cycle
5%
8%
12.5%
25%
4.2 Test Purpose
Simulate PSU at above table duty cycle 5%, 8%, 12.5%, 25% load situation.
Test input voltage at low line and high line, 10min test time for each Duty Cycle part.
4.3 Check&NOTES(Check and focus NOTES 2):
PSU no any shut down state and no any fault condition during the test,unless
5. TIMING
5.1 Signal timing drawing
Figure 2. is a reference for signal timing for main power connector signals and rails.
VAC
PS_ON#
95%
+12 VDC
+5 VDC
Outputs
+3.3 VDC
10%
PWR_OK
PWR_OK Sense level=95% of nominal
Figure 2. PS-OK Timing Sequence
Time Constant
Time for Power
(TC)
Excursion (TE)
1900 μs
11.5ms
70ms
300 ms
T1:Power-on time
T2:Rise time
T3:PWR_OK delay
T4:PWR_OK rise time
T5:AC loss to PWR_OK hold-up time
T6:PWR_OK inactive to DC loss delay > 1ms
Power @ TC
100 μs
688.2W
1ms
673W
10ms
661.2W
100 ms
692.8W
< 150ms
100-150ms
< 10ms
> 16ms
Power @ TE
1500 W
1350W
1200W
900W
0.2-20ms
NOTES
06
Publicité
