IC PFC CONTROLLER 16SOIC

SG6903SZ

Manufacturer Part NumberSG6903SZ
DescriptionIC PFC CONTROLLER 16SOIC
ManufacturerFairchild Semiconductor
SG6903SZ datasheet
 

Specifications of SG6903SZ

Mounting TypeSurface MountPackage / Case16-SOIC (3.9mm Width)
Output Voltage1.5 V to 8 VSwitching Frequency65 KHz
Operating Temperature Range- 20 C to + 85 CMounting StyleSMD/SMT
Duty Cycle (max)83 %Lead Free Status / RoHS StatusLead free / RoHS Compliant
Voltage - Supply-Operating Temperature-
Frequency - Switching-Mode-
Current - Startup-  
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Green Mode PFC/Flyback-PWM Controller
Limited Power Control
Every time when the output of power supply is
shorted or over loaded, the FBPWM voltage will increase.
If the FBPWM voltage is higher than a designed threshold,
FB
(4.5V), for longer than t
OPEN-LOOP
OPEN-PWM
OPWM will then be turned off.
As long as the voltage on the VDD pin is larger than
V
(minimum operating voltage), the OPWM will
DD-OFF
not be enabled. And this protection will be reset every
t
interval. A low frequency hiccup mode
OPEN-PWM-Hiccup
protection will then be achieved to prevent the power
supply from being overheated under over loading
condition.
© System General Corp.
Version 1.0.1 (IAO33.0061.B0)
Gate Drivers
SG6903 output stage is a fast totem-pole gate driver.
The output driver is clamped by an internal 18V Zener
diode in order to protect the external power MOSFET.
(56ms), the
- 17 -
www.sg.com.tw • www.fairchildsemi.com
Product Specification
SG6903
September 28, 2007