WS9445 Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – Non-isolated BuckOffline LED Driver

WS9445 Product Description
Features
 Critical Conduction Mode Operation
 Internal 600V Power MOSFET
 Gate Drive and No Auxiliary Winding
 ±3% LED Current Accuracy
 Efficiency up to 93%
 LED Short Circuit Protection
 LED Open Circuit Protection
 Current Sense Resistor Short Protection
 Thermal Regulation Function
Applications
 LED Bulb Lights
 LED Panel Lights
 LED Strings
Typical Application Circuit
Non-isolated BuckOffline LED Driver
Description
The WS9445 is a high precision buck constant current LED
driver and is applied to non-isolated buck LED power system with
AC input voltage of 85VAC-265VAC. The WS9445 integrates a
600V power MOSFET, and can achieve excellent constant current
performance with very few external components, so the system
cost and size are minimized. The driver operates in critical
conduction mode, and the output current does not change with the
inductance and LED output voltage. The operating current of the
IC is 200uA, so it doesn’t need the auxiliary winding for supplying
the chip, thus simplifying design and reducing cost.
The WS9445 adopts intelligent temperature control and
thoroughly solves the problem of light flashing at high
temperatures.The WS9445 offers full protection functions to
improve the system reliability, including LED open circuit
protection, LED short circuit protection, CS resistor short circuit
protection and thermal regulation function.
The WS9445 is available in DIP-7 Package.
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
Copyright@Winsemi Microelectronics Co., Ltd., All right reserved.
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
0318