OCPRF100 MP Server System Technical Product Specification

Revision 1.0

Table 5-9: AC Good Signal

AC OK Signal

Voltage Level †

Current

 

 

 

LOW: AC is not yet up to the level.

0.4 V max

4 mA min sink current

 

 

 

HIGH: AC is up to the level.

4 V min

0.5 mA max source current

 

 

 

† Measured relative to the power supply DC common output ground pins

5.6.3Power Good (Output)

Each power supply provides a power good signal. A pin must be allocated for this signal. This signal indicates that all outputs have reached acceptable operating voltage. The power good signal levels and sourcing/sinking requirements are shown in Table 5-10: Power Good Signal. The power good signal is an output signal from the power supply to the system.

Table 5-10: Power Good Signal

Power Good Signal

Voltage Level †

Current

 

 

 

LOW STATE DE-ASSERTED

0.4 V max

4 mA min sink current

(Power Not Good)

 

 

 

 

 

HIGH STATE ASSERTED

4 V min

0.5 mA max source current

(Power Good)

 

 

 

 

 

† Measured relative to the power supply DC common output ground pins.

The power good signal is held low until all outputs have reached at least 90% of their respective operating voltages. The turn on delay for the power good signal is between 100 and 1500 milli- seconds.

The power good signal is low for a minimum of 1 millisecond before any of the output voltages fall below the regulation limits. Tests are conducted with a maximum load and minimum line voltage.

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