Technical Product Specification

Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS System Power Sub-system
32 Intel order number G38159-002 Revision 1.2
Item
Description
Min
Max
Units
T
sb_vout
Delay from 12VSBbeing in regulation to O/Ps
being in regulation at AC turn on.
50
1000
ms
T
12VSB_holdup
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.
Figure 18. Turn On/Off Timing (Power Supply Signals)
2.1.5 Protection Circuits
Protection circuits inside the power supply causes only the power supply’s main outputs to
shutdown. 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 is able to reset the power supply.
2.1.5.1 Current Limit (OCP)
The power supply has current limit to prevent the outputs from exceeding the values shown in
table below. If the current limits are exceeded the power supply shuts down and latches off. The
latch will be cleared by toggling the PSON
#
signal or by an AC power interruption. The power
supply does not be damaged from repeated power cycling in this condition. 12VSB will be auto-
recovered after removing OCP limit.
AC Input
Vout
PWOK
12Vsb
PSON
T
sb_on_delay
T
AC_on_delay
T
pwok_on
T
vout_holdup
T
pwok_holdup
T
pson_on_delay
T
sb_on_delay
T
pwok_on
T
pwok_off
T
pwok_off
T
pson_pwok
T
pwok_low
T
sb_vout
AC turn on/off cycle
PSON turn on/off cycle
T
5Vsb_holdup