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WS9445

Applications
LED Bulb Lights
LED Panel Lights
LED Strings

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
 

Structure Type

Part NO.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Non-isolation

PF0.5

WS9445

5A/600V

DIP7

160V/400mA

80V/450mA

External Set

WS9445.pdf

 

 
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.
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Return Policy

30 Days Service

Solution & Support

Call +86-755-8418 2951