SilverStone SST-ST40NF [5/12] St40nf manual 4

SST-ST40NF

4.2.5 OVERLOAD PROTECTION

4.2.6 POWER GOOD SIGNAL

The power good signal is a TTL compatible signal for the purpose of initiating an orderly

star-up procedure under normal input operating conditions. This signal is asserted (low)

until +5Vdc has reached 4.75 volts during power up. Characteristics:

TTTL signal asserted (low state) : less than 0.4V while sinking 4mA.

TTL signal asserted (high state): Between 2.4 V and 5 V output while sourcing 200 µA

High state output impedance: less or equal to 1Kohm from output to common.

OUTPUT VOLTAGE

+3.3V

+5V

+12V

50A

48A

40A

Max. overcurrent limit

POWER GOOD @ 99Vac~264Vac,FULL LOAD

POWER FAIL @99Vac~264Vac, FULL LOAD

100 –500mSec.

1 mSec. minimum

PS_ON ON

OFF

T1 20mS

T2 100~500mS

T3 1mS

+3.3VO/P

+5V O/P

+12VO/P

P. G .

P.G. SENSE

LEVEL 95%

T1 T2 T3