Intel SC5299WS User Manual

Signal Type (Input Signal to Supply) 

Accepts a ground input from the system. Pull-up to VSB 
located in the power supply. 

PSKILL = Low, PSON

#

 = Low 

ON 

PSKILL = Open, PSON

#

 = Low or Open 

OFF 

PSKILL = Low, PSON

#

 = Open 

OFF 

 

MIN MAX 

Logic level low (power supply ON) 

0V 

1.0V 

Logic level high (power supply OFF) 

2.0V 

5.25V 

Source current, Vpskill = low 

 

4mA 

Delay from PSKILL=High to power supply 
turned off (T

PSKill

)1 

 

100

  s 

a. T

PSKill

 is the time from the PSKill signal de-asserting HIGH to the power supply’s output inductor discharging. 

 

2.3.5.3 

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 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. 

Signal Type

Open collector/drain output from power supply. Pull-up 
to VSB located in system. 

PWOK = High 

Power OK 

PWOK = Low 

Power Not OK 

 

MIN 

MAX 

Logic level low voltage, Isink=4mA 

0 V 

0.4 V 

Logic level high voltage, Isource=200

  A 

2.4 V 

5.25 V 

Sink current, PWOK = low 

 

4 mA 

Source current, PWOK = high 

 

2 mA 

PWOK delay: T

pwok_on

 

100 ms 

1000 ms 

PWOK rise and fall time 

 

100 

  s 

Power down delay: T 

pwok_off

 

1 ms 

200 ms