Intel SE7501WV2 manual ,

Intel® Server Board SE7501WV2 TPS General Specifications
Revision 1.0
Intel reference number C25653-001
161
Figure 12. Output Voltage Timing
The following tables show the timing requirements for a single power supply being turned on
and off via the AC input, with PSON held low and the PSON signal, with the AC input applied.
The ACOK# signal is not being used to enable the turn on timing of the power supply.
Table 99. Voltage Timing Parameters
Item Description Min Max Units
Tvout_rise Output voltage rise time from each main output. 5 70 msec
Tvout_on All main outputs must be within regulation of each other
within this time.
50 msec
T vout_off All main outputs must leave regulation within this time. 400 msec
Table 100. Turn On / Off Timing
Item Description Min Max Units
Tsb_on_delay Delay from AC being applied to 5VSB being within
regulation.
1500 msec
T ac_on_delay Delay from AC being applied to all output voltages being
within regulation.
2500 msec
Tvout_holdup Time all output voltages stay within regulation after loss
of AC.
21 msec
Tpwok_holdup Delay from loss of AC to de-assertion of PWOK 20 msec
Tpson_on_delay Delay from PSON# active to output voltages within
regulation limits.
5 400 msec
Vout
10%
Vout
Tvout rise
Tvout_on
Tvout_off
V1
V2
V3