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Winsemi - High Precision PSR Constant Current LED Driver

Numéro de référence WS9256
Description High Precision PSR Constant Current LED Driver
Fabricant Winsemi 
Logo Winsemi 





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WS9256 fiche technique
WS9256ProductDescription
High Precision PSR Constant Current LED Driver
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
Applications
LED bulb light
Other LED lighting
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.
Typical Application
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
Copyright@WinsemiMicroelectronics Co.,Ltd.,All rightreserved.
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
1209

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