WS9254 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – High Precision PSR Constant Current LED Driver

WS9254ProductDescription
High Precision PSR Constant Current LED Driver
Features
 Built-in600V 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
Applications
 LED bulb, spot light
 OtherLED lighting
Description
The WS9254 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 12W.
The WS9254integrates 600V 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, theWS9254 realizes ±3% accuracy of LED
current along with excellent line regulation and load
regulation.
The WS9254 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.
Typical Application
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