SilverStone ST46GF [9/16] Protection

ST46GF

3.7 Remote On/Off Control: PSON#

The PSON# 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.

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 ] 65%, 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. The +5VSB line is capable of delivering at a maximum of 2.0A for PC board

circuit to operate.

4. Protection

Protection circuits inside the power supply shall cause only the power supply's main outputs

to shutdown. If the power supply latches off due to a protection circuit tripping, either a AC

cycle OFF for 15 sec, or PSON# cycle HIGH for 1 sec must be able to restart the power

supply.

Signal

Accepts an open collector/drain input from the

system. Pull-up to VSB located in power supply.

PSON# = Low

Power ON

PSON# = Open Power OFF

MIN

MAX

Logic level low (Power supply ON)

Logic level low (Power supply OFF)

2.4V

Source current, Vpson = Low

Power up delay: Tpson_on_delay

0.8V

5.25V

4mA

50mSec

400mSec

5mSec

PWOK delay : Tpson_pwok