SilverStone ST45NF [9/15] Nj450 manual 8

3.7. Remote On/Off Control : PSON#

The PWON# signal is required to remotely turn on/off the power supply. PSON# is an

active low signal that turns on the +5V, +3.3V, +12V and -12V power rails. When this

signal is not pulled low by the system, or left open, the outputs (except the +5VSB and

Vbias) turn off. This signal is pulled to a standby voltage by a pull-up resistor internal

to the power supply.

Signal Type

Accepts an open collector/drain input from

the system. Pull-up to VSB locted in power

supply.

PSON# = Low

PSON# = Open

Logic level low (Power supply ON)

Logic level low (Power supply OFF)

Source current, Vpson = Low

Power up delay: Tpson_on_delay

PWOK delay : Tpson_pwok

Power ON

Power OFF

MIN MAX

0V 0.8V

2.0V

5.25V

4mA

400mSec5mSec

50mSec

Table 13 - PWOK Signal Characteristics

3.8. Overshoot at Turn-on /Turn-off

Any output overshoot at turn on shall be less than 10% of the nominal output value.

Any overshoot shall recover to within regulation in less than 10ms.

3.9. Efficiency

The minimum power supply system efficiency shall be 80%, measured at nominal

input voltage 115 V or 230 V and full loading.

3.10. +5VSB (Standby)

The +5VSB output is always on (+5V Standby) when AC power is applied and power

switch is turned on and the +5VSB line is capable of delivering at a maximum of 1.5A

for PC board circuit that power supply is in standby mode. The maximum output current

of 5Vsb shall be 2.5A that power supply is in powered-on mode.

SST-ST45NF