Technical Product Specification

System Power Sub-system Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS
Revision 1.2 Intel order number G38159-002
45
2.2.4.13 Timing Requirements
These are the timing requirements for the power supply operation. The output voltages must
rise from 10% to within regulation limits (T
vout_rise
) within 5 to 70ms. For 12VSB, it is allowed to
rise from 1.0 to 25ms. All outputs must rise monotonically. Table below shows the timing
requirements for the power supply being turned on and off by the AC input, with PSON held low
and the PSON signal, with the AC input applied.
Table 40. Timing Requirements
Item
Description
MIN
MAX
UNITS
T
vout_rise
Output voltage rise time
5.0 *
70 *
ms
Tsb_on_delay
Delay from AC being applied to 12VSBbeing within
regulation.
1500
ms
T ac_on_delay
Delay from AC being applied to all output voltages being
within regulation.
3000
ms
Tvout_holdup
Time 12Vl output voltage stay within regulation after loss of
AC.
13
ms
Tpwok_holdup
Delay from loss of AC to de-assertion of PWOK
10.6
ms
Tpson_on_del
ay
Delay from PSON# active to output voltages within regulation
limits.
5
400
ms
T pson_pwok
Delay from PSON# deactivate to PWOK being de-asserted.
5
ms
Tpwok_on
Delay from output voltages within regulation limits to PWOK
asserted at turn on.
100
500
ms
T pwok_off
Delay from PWOK de-asserted to output voltages dropping
out of regulation limits.
1
ms
Tpwok_low
Duration of PWOK being in the de-asserted state during an
off/on cycle using AC or the PSON signal.
100
ms
Tsb_vout
Delay from 12VSBbeing in regulation to O/Ps being in
regulation at AC turn on.
50
1000
ms
T12VSB_holdu
p
Time the 12VSBoutput voltage stays within regulation after
loss of AC.
70
ms
* The 12VSBoutput voltage rise time shall be from 1.0ms to 25ms
2.2.5 Protection Circuits
Protection circuits inside the power supply shall cause only the power supply’s main outputs to
shut down. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF
for 15sec and a PSON
#
cycle HIGH for 1sec shall be able to reset the power supply.