DS800SL Series Data Sheet

PWOK# (POWER GOOD)

PWOK is a power good signal and will assert HIGH when the outputs are within the regulation limits. PWOK will be pulled LOW by the

power supply to indicate when either output 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. The start of the PWOK# delay time shall be inhibited as long as the +12 Vdc output is

in current limit or the 5.0 Vsb output is below the regulation limit.

PWOK Signal Characteristics

Signal Type

Open collector/drain output from power supply.

Pullup to 5.0 Vsb external to the power supply.

PWOK = High

Power Good

PWOK = Low

Power Not Good

MIN

MAX

To tLogic level low voltage, Ising = 4 mA

0 V

0.8 V

Logic level high voltage, Isource = 200 µA

2.0 V

5 .2V

Sink current, PWOK = low

4 mA

Source current, PWOK = high

2 mA

100 ms

1000 ms

PWOK rise and fall time

100 µsec

1 msec

1000 msec

PSKILL

The +12 Vdc output only from the power supply shall be disabled if the PSKILL input is high and V Standby will continue to be provided,

outputs may be enabled if this signal is low. The power supply includes a pull up to disable all outputs if this signal is open. PSKILL whall not

be connected during a hot insertion before all of the other pins are connected.

AC INPUT PRESENT INDICATOR (ACOK/L)

The ACOK signal is used to indicate presence of AC input to the power supply. This signal shall be connected to Vsb through a resistor on

the host system side. A logic “Low” level on this signal shall indicate AC input to the power supply is present. A Logic “High” on this signal

shall indicate a loss of AC input to the power supply.

Signal Type

Pull up to 5.0 Vsb through a resistor in the

host system.

Present = High

Present

Present = Low

Not Present

MIN

MAX

Logic level low voltage, Isink = 4 mA

0 V

0.8 V

Logic level high voltage, Isink = 50 µA

2.0 V

5.2 V

4 mA

50 µsec