AN-6075 Datasheet, PDF (8/11 Pages) Fairchild Semiconductor – Compact Green-Mode Adapter

AN-6075
APPLICATION NOTE
5. Typical Application Circuit
Application
Adapter
Output Power
2.04W
Input Voltage Range
Universal Input
(85-264VAC)
Output Voltage/Maximum Current
5.1V/0.4A
5.1 Features
ƒ Single Chip 700V SenseFET Power Switch
ƒ Soft-Start Time Tuned by External Capacitor
ƒ Built-in Overload Protection (OLP) and Internal Thermal Shutdown Function (TSD) with Hysteresis
ƒ Low Standby Mode Power Consumption (Input Wattage <0.3W at No-Load Condition)
5.2 Key Design Notes
ƒ Resistors R₁ and inductance L₁ improve EMI.
ƒ External V_CC auxiliary circuit is from with D₆, C₉, C₁₀, and R₉. The external V_CC auxiliary winding circuit reduces
internal circuit power loss and improves power saving.
F₁
D₁
AC
Input
D₂
V_CC
C₁₁
D₆
R₁₀
C₁₀
C₁₂
D₄
L₁
D_{3 C4 R1}
R₄ C₁
C₅
T₁
R₉
D₅
Drain
FSQ500L
2 _U1
PWM
External V_CC Auxiliary Circuit
PC817
R_sense
431
V_FB V_CC GND
C₇ C₉
R₅ C₂
D₇
C₈
L₃
C₃
V_O
R₃
PC817
U₃
U₂
KA431
R₃
C₆ R₇
R₆
R₈
Figure 15. Schematic
© 2008 Fairchild Semiconductor Corporation
Rev. 1.0.0 • 9/11/08
8
www.fairchildsemi.com