SG6516 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – PC Power Supply Supervisors

PC Power Supply Supervisors
FEATURES
„ Two 12V sense input pins: VS12 and VS12B
„ Over-Voltage Protection (OVP) for 3.3V, 5V,
and two 12V
„ Over-Current Protection (OCP) for 3.3V, 5V,
and two 12V
„ Under-Voltage Protection (UVP) for 3.3V, 5V,
and two 12V
„ Open-drain output for PGO and FPO pins
„ 300ms power-good delay
„ 300ms turn-on delay for 3.3V, 5V, and two 12V
„ 2.8ms PSON control to FPO turn-off delay
„ 48ms PSON control delay
„ No lockup during the fast AC power on/off
„ Wide supply voltage range from 4V to 15V
DESCRIPTION
SG6516 is designed to provide the voltage and current
supervisor function, remote on/off (PSON) function,
Product Specification
SG6516
power-good (PGO) indicator function, and fault
protection (FPO) function for switching power systems.
For supervisor, it provides over-voltage protection (OVP)
for 3.3V, 5V, and two 12V; over-current protection (OCP)
for 3.3V, 5V, and two 12V; under-voltage protection
(UVP) for 3.3V, 5V, and two 12V. When 3.3V, 5V, or
12V voltage decreases to 2.3V, 3.5V, and 9V respectively,
the under-voltage protection (UVP) function is enabled.
FPO is set to high to turn off the PWM controller IC. The
voltage difference across external current shunt is used for
OCP functions. An external resistor can be used to adjust
protection threshold.
The power supply is turned on after a 48ms delay time
when PSON signal is set from high to low. To turn off the
power supply, the PSON signal is set from low to high
with the delay time 48ms. The PGI circuitry provides a
power-down warning signal for PGO. When PGI input is
lower than the internal 1.25V reference voltage, the PGO
signal is pulled low.
TYPICAL APPLICATION
© System General Corp.
Version 1.0.1 (IAO33.0029.B1)
-1-
www.sg.com.tw • www.fairchildsemi.com
September 24, 2007