Synchronous Rectifier Controller
Product Specification
Synchronous Rectifier Controller for Flyback Converter
SG6203
FEATURES
Low oper...
Description
Product Specification
Synchronous Rectifier Controller for Flyback Converter
SG6203
FEATURES
Low operation current (1.7mA) One resistor for timing setting Internal automatic tracking for optimum dead time No reverse energy flow at light load Best suited for primary green-mode PWM IC Wide supply voltage range from 6V to 20V Built-in 18V Zener diode Optional current sensing: - Current shunt - RC network for better efficiency
DESCRIPTION
The SG6203 is designed to control and drive the synchronous rectifier for the flyback converter. The synchronous signal of the primary switch is obtained by a single diode connected between the transformer secondary winding and the SG6203. Using the SG6203, no additional transformer winding is required and the circuit complexity can be minimized. The power unit can be properly operated under discontinuous conduction mode (DCM) or continuous conduction mode (CCM). Problems such as “shoot-through” or “cross conduction” in CCM and energy-reverse from the secondary to the primary in DCM are prevented by the SG6203 design.
APPLICATIONS
Flyback converters, such as: Power adaptors Open-frame SMPS
TYPICAL APPLICATION
www.DataSheet4U.com
© System General Corp. Version 1.0.1 (IAO33.0010.B1)
-1-
www.sg.com.tw www.fairchildsemi.com September 24, 2007
Product Specification
Synchronous Rectifier Controller for Flyback Converter
SG6203 PIN CONFIGURATION
MARKING DIAGRAMS
SG6203TP
XXXXXXXXYWWV
T: D=DIP, S=SOP P : Z=Lead Free...
Similar Datasheet