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參數資料
型號: SG6108DZ
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 電源管理
英文描述: Power Supply Supervisor + PWM
中文描述: 4-CHANNEL POWER SUPPLY SUPPORT CKT, DIP20
封裝: LEAD FREE, DIP-20
文件頁數: 1/16頁
文件大小: 656K
代理商: SG6108DZ
Product Specification
Power Supply Supervisor + PWM
FEATURES
PC half-bridge (or 494) power supply supervisor +
PWM
Highly Integrated and Few external components
required
Over voltage protection 3.3V/5V/12V (two 12V)
Under voltage protection 3.3V/5V/12V (two 12V)
Under voltage protection for –12V and/or –5V
Over current protection 3.3V/5V/12V (two 12V)
Over power protection
Short circuit protection
Power-down warning circuitry
Power good circuitry
Delay time for PSON and PG signals
Remote ON/OFF function
On-Chip oscillator and Error amplifier
Latching PWM for cycle-by-cycle switching
Soft-start
Maximum 48% duty cycle
APPLICATIONS
SG6108
System General Corp.
Version 1.0.1 (IAO33.0048.B0)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 26, 2007
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3.3V
Vdd
12V
Main Transformer
5Vsb
Pok
Pson
5V
-5V
-12V
5V
12V
12V
-12V
UVAC
IS12
IS5
IS33
Vcc
PG
Pson
OP1
V33
V5
V12
VS12B
NVP
RI
GND
IN
COMP
SS
OP2
OPP
SG6108
Switching mode power supplies for computers such
as ATX, NLX, and SFX (micro-ATX).
DESCRIPTION
The SG6108 controller is designed for desktop PC
switching mode power supplies. It provides everything
necessary to monitor and control the output of the power
supply. Remote ON/OFF control, power good circuitry,
over-voltage protection, over-power protection, and
over-current protection are all included. The SG6108
directly senses all the output rails for over voltage
conditions without requiring external dividers. An
innovative AC-signal sampling circuit provides an
adequate power-down warning signal for PG. A built-in
timer generates accurate timing for the control circuit.
Cycle-by-cycle PWM switching protects the power
transformer from saturation and ensures a rapid response
for short-circuit protection. This greatly reduces the stress
on the power transistors. The SG6108 utilizes a minimum
number of external components while including all the
functions needed for push-pull and/or half-bridge
topologies. This decreases production costs and PCB
space while increasing the power supply’s MTBF.
TYPICAL APPLICATION
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