IStarUSA IS-1800RH1UP Datasheet download pdf (Page 6)

AC Input AC Off AC On

vout_holdup

Vout

ac_on-delay Tpwok_low

Tsb_on-delay Tpwok_off Tpwok_off

PWOK T

pwok_on Tpwok_holdup Tsb_on-delay Tpwok_on

Tpson_pwok

+5VSB T

sb_vout Tsb_holdup

Min.>70mS

Tpson_on_delay

PSON#

AC turn 0n/off cycle PSON turn on/off cycle

Figure 2 : Turn On/Off Timing

3.4 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,-5V and –12V power rails. When this signal is not pulled low by

the system, or left open, the outputs (except the +5VSB and V bias) turn off. This signal is pulled to a

standby voltage by a pull-up resistor internal to the power supply.

niard/rotcelloc nepo na stpeccA epyT langiS

input from the system. Pull-up to

VSB located in power supply.

NO rewoP woL = #NOSP

FFO rewoP hgiH = #NOSP

Table 6 – PWOK Signal Characteristic

3.5 Efficiency

The efficiency is ʁ 75% at full loading condition to help reduce system power consumption at typical

system loading conditions.

3.6 +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 3A 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.

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IStarUSA IS-1800RH1UP Datasheet Page 6