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WS9256

Applications
LED bulb light
Other LED lighting

Features
Built-in 650V Power MOSFET
Constant current control without secondary sense and feedback circuit.
±3% LED current accuracy
Ultra low operating current to improve efficiency
High resistance feedback resistor to improve efficiency
Universal input voltage
LED short and open circuit protection
VCC under-voltage protection
Feedback loop short circuit protection
Current sense resistor open circuit protection
Over temperature protection
No external loop compensation component required
Available in DIP-7 package
 

Structure Type

Part NO.

MOS

Package

App. Watt

OVP

PDF

176-264Vac

90-264Vac

Isolation

PF0.5

WS9256

3A/650V

DIP7

36W

24W

External Set

WS9256.pdf 

 
Description
The WS9256 is a high precision primary-side feedback and regulation controller for LED lighting, it operates in constant current control mode and is designed to work in inductor current discontinuous conduction mode and extremely suitable for flyback convertor under universal input, the output power of system should be less than 24W.
The WS9256 integrates 650V power MOSFET. Since adopting primary sense and feedback control technology,the secondary sense and feedback circuit is eliminated.The loop compensation components are also removed while maintaining stability overall operating conditions. The low component counts and low BOM cost are realized.Since using the proprietary high accurate current sense method, the WS9256 realizes ±3% accuracy of LED current along with excellent line regulation and load regulation.
The WS9256 offers rich protection functions including LED short circuit protection, LED open circuit protection, die over-temperature protection, VCC over voltage protection, VCC under voltage protection and FB short circuit protection. All the protection features are auto-recovery.
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Return Policy

30 Days Service

Solution & Support

Call +86-755-8418 2951