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參數資料
| 型號： | SG6203SZ |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Synchronous Rectifier Controller for Flyback Converter |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, PDSO8 |
| 封裝： | ROHS COMPLIANT, SOP-8 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 465K |
| 代理商： | SG6203SZ |
Product Specification
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 range from 6V to 20V
Built-in 18V Zener diode
Optional current sensing:
-
Current shunt
-
RC network for better efficiency
APPLICATIONS
Flyback converters, such as:
Power adaptors
Open-frame SMPS
SG6203
System General Corp.
Version 1.0.1 (IAO33.0010.B1)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 24, 2007
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).
“shoot-through” or “cross conduction” in CCM and
energy-reverse from the secondary to the primary in DCM
are prevented by the SG6203 design.
Problems
such
as
TYPICAL APPLICATION
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