WS2580 Datasheet, PDF (1/9 Pages) Shenzhen Winsemi Microelectronics Co., Ltd – Low Power Primary Side AC/DC Controller

WS2580 Product Description
Features
� 100mW no-load power
� Lower start-up current
� PFM mode
� Build-in Leading Edge Blanking
� Cycle by cycle over current protection (OCP)
� Under voltage lockout
� ±5% CC、CV Accuracy
� Ultra low standby power (<100mW)
Applications
Universal switch power supply equipment and offline
AC/DC flyback power converter
� Adapters/Chargers for Cell phones, PDAs, MP3 and
other portable apparatus
� LED Driver
� Standby and Auxiliary power supplies
Low Power Primary Side AC/DC Controller
General Description
The WS2580 is a high performance AC/DC power supply
controller for battery charger and adapter applications.
The device uses Pulse Frequency Modulation (PFM) method
to build discontinuous conduction mode (DCM) flyback
power supplies. The WS2580 provides accurate constant
voltage and constant current (CC/CV) regulation without
requiring the opto-coupler and the secondary control
circuitry.
It also eliminates the need of loop compensation circuitry
while maintaining stability.
The WS2580 achieves excellent regulation and high power
efficiency, the no-load power consumption is less than
100mW.
The WSWS2580 is available in SOT23-6 package.
Typical Application Circuit
L
V+
N
V-
1
OUT
2 _GND
3
VCC
FB ⁶
5
CPC
4
CS
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Copyright@Winsemi Microelectronics Co., Ltd., All right reserved.
WINSEM I M ICROELECTRONICS
W/T-Y019-Rev.A/2 May.2014
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