Intel SC5299WS User Manual
Power Sub-system
Intel
®
Entry Server Chassis SC5299-E TPS
Revision
3.1
Intel order number D37594-005
104
2.5.10.2
PWOK (Power OK) Output Signal
PWOK is a power OK signal and is pulled HIGH by the power supply to indicate that all the
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. The start
of the PWOK delay time is inhibited as long as any power supply output is in current limit.
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. The start
of the PWOK delay time is inhibited as long as any power supply output is in current limit.
Table 128. PWOK Signal Characteristics
Signal Type
Open collector/drain output from power supply. Pull-up
to VSB located in system.
to VSB located in system.
PWOK = High
Power OK
PWOK = Low
Power Not OK
MIN
MAX
Logic level low voltage, Isink=4mA
0V
0.4V
Logic level high voltage, Isource=200
A
2.4V 5.25V
Sink current, PWOK = low
4mA
Source current, PWOK = high
2mA
PWOK delay: T
pwok_on
100ms
1000ms
PWOK rise and fall time
100
sec
Power down delay: T
pwok_off
1ms
200msec