General Specifications
Intel® Server Board SE7520AF2 TPS
244
Revision
1.2
Intel order number C77866-003
reach regulation within 50 ms (T
vout_on
) of each other and begin to turn off within 400 ms (T
vout_off
)
of each other. The following figure shows the output voltage timing parameters.
Figure 44. 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 146. Voltage Timing Parameters
Item
Description
Min
Max
Units
T
vout_rise
Output voltage rise time from each main output.
5
70
msec
T
vout_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 147. 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
T
vout rise
T
vout_on
T
vout_off
V1
V2
V3