Table 33. Pwok Signal Characteristics - Intel SC5650HCBRP Product Specification

Intel® Server System SC5650HCBRP TPS
4.1.5.3 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 the 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.
Signal Type
PWOK = High
PWOK = Low
Logic level low voltage, Isink=4mA
Logic level high voltage, Isource=200μA
Sink current, PWOK = low
Source current, PWOK = high
PWOK delay: Tpwok_on
PWOK rise and fall time
Power down delay: T pwok_off
4.1.5.4 LEDs
There is a bi-color LED and a single color LED to indicate power supply status. The LED
operation is defined in the following table.
Revision 1.2

Table 33. PWOK Signal Characteristics

Open collector/drain output from power supply. Pull-up to
Power OK
Power Not OK
MIN
0 V
2.4 V
100 ms
1 ms
Intel order number E81443-002
Power Sub-system
VSB located in system.
MAX
0.4 V
5.25 V
4 mA
2 mA
1000 ms
100 μs
200 ms
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