Intel SC5299WS User Manual

Signal Type

Accepts an open collector/drain input from the system. 
Pull-up to 5V located in power supply. 

PSON

#

 = Low  

ON 

PSON

#

 = High or 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, Vpson = low 

 

4mA 

Power up delay:    T

pson_on_delay

 5msec 

400msec 

PWOK delay:       T 

pson_pwok

  

50msec 

2.1.6.5 

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 that 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 within 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 

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