SG6203DZ Fairchild Semiconductor, SG6203DZ Datasheet

IC SYNCHRONOUS FRWRD CTRLR 8DIP

SG6203DZ

Manufacturer Part Number
SG6203DZ
Description
IC SYNCHRONOUS FRWRD CTRLR 8DIP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of SG6203DZ

Applications
Synchronous Forward Controller
Voltage - Supply
4.8 V ~ 20 V
Current - Supply
1.7mA
Operating Temperature
-30°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Synchronous Rectifier Controller for Flyback Converter
FEATURES
APPLICATIONS
Flyback converters, such as:
TYPICAL APPLICATION
© System General Corp.
Version 1.0.1 (IAO33.0010.B1)
-
-
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:
Power adaptors
Open-frame SMPS
Current shunt
RC network for better efficiency
- 1 -
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
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
“shoot-through” or “cross conduction” in CCM and
energy-reverse from the secondary to the primary in DCM
are prevented by the SG6203 design.
DESCRIPTION
diode connected between the transformer
mode
www.sg.com.tw • www.fairchildsemi.com
(CCM).
Product Specification
Problems
September 24, 2007
SG6203
such
as

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SG6203DZ Summary of contents

Page 1

Synchronous Rectifier Controller for Flyback Converter 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 ...

Page 2

... XXXXXXXX: Wafer Lot XXXXXXXXYWWV Y: Year; WW: Week V: Assembly Location ORDERING INFORMATION Part Number Pb-Free SG6203SZ SG6203DZ PIN DESCRIPTIONS Pin Name Function 1 Vcc Supply voltage of gate driver and control circuits. Totem-pole output to drive the synchronous power MOSFET. When the voltage on DET pin falls below 1.4V ...

Page 3

Synchronous Rectifier Controller for Flyback Converter BLOCK DIAGRAM © System General Corp. Version 1.0.1 (IAO33.0010.B1) Product Specification - 3 - www.sg.com.tw • www.fairchildsemi.com SG6203 September 24, 2007 ...

Page 4

Synchronous Rectifier Controller for Flyback Converter ABSOLUTE MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage Gate Output Current OUT V DET, OUT RT, IN+, IN Power Dissipation D Thermal Resistance (Junction-to-Air) R θ ...

Page 5

Synchronous Rectifier Controller for Flyback Converter Synchronous Detection Section Symbol Parameter V Threshold Voltage to Enable One-shot Signal TH V Threshold Voltage to Enable Output TL I Current Output from DET Pin DET T _ Debounce Time from DET Low ...

Page 6

Synchronous Rectifier Controller for Flyback Converter TYPICAL CHARACTERISTICS Start Threshold (VTH(ON)) vs Temperature 6.5 6.4 6.3 6.2 6.1 6.0 5.9 5.8 5.7 5.6 5.5 -40 -25 - Temperature (℃) Minimum Operating Voltage (VTH(OFF)) vs Temperature ...

Page 7

Synchronous Rectifier Controller for Flyback Converter Threshold voltage to enable the output (V 1.56 1.54 1.52 1.50 1.48 1.46 1.44 1.42 -40 -25 - Temperature ( ℃ ) © System General Corp. Version 1.0.1 (IAO33.0010.B1) ...

Page 8

Synchronous Rectifier Controller for Flyback Converter OPERATION DESCRIPTION Synchronization The DET pin provides on/off information of the primary switch. As shown in the following reference circuits, one diode connected between the DET pin and the secondary winding of the transformer ...

Page 9

Synchronous Rectifier Controller for Flyback Converter REFERENCE CIRCUIT-A BOM Ref Des © System General Corp. Version 1.0.1 (IAO33.0010.B1) Part Number Description 0.1µF 22pF FR102 100V/1A SB1100 100V/1A ...

Page 10

Synchronous Rectifier Controller for Flyback Converter REFERENCE CIRCUIT-B © System General Corp. Version 1.0.1 (IAO33.0010.B1) Product Specification - 10 - www.sg.com.tw • www.fairchildsemi.com SG6203 September 24, 2007 ...

Page 11

Synchronous Rectifier Controller for Flyback Converter PACKAGE INFORMATION 8 PINS-SOP( Dimensions Millimeter Symbol Min. A 1.346 A1 0.101 4.648 E 3.810 e 1.016 F H 5.791 L 0.406 θ˚ 0 ° © System ...

Page 12

Synchronous Rectifier Controller for Flyback Converter 8PINS–DIP( Dimension Millimeter Symbol Min 0.381 A2 3.175 9.017 E E1 6.223 e L 2.921 e 8.509 B 0 ° θ° © ...

Page 13

Synchronous Rectifier Controller for Flyback Converter © System General Corp. Version 1.0.1 (IAO33.0010.B1) Product Specification - 13 - www.sg.com.tw • www.fairchildsemi.com SG6203 September 24, 2007 ...

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