OB5682x is a primary side regulation off-line LED lighting power switch which can achieve accurate LED current. It significantly simplifies LED lighting system design by eliminating the secondary side feedback circuitry, HV startup resistor and power supply capacitor.
LED current (CC control) can be adjusted by the external sense resistor connected between CS pin and ground.
OB5682x offers comprehensive protection coverage with auto-recovery features including LED open circuit protection, LED short circuit protection, Cycle-by-Cycle current limiting, and thermal foldback, etc.
OB5682x is offered in SOT33-5(A)/SOP7/DIP7/ CDFN8-7 package.
n HV startup without power supply capacitor
n Low System Cost and High Efficiency
n Low operation current
n Primary-side Sensing and Regulation Without TL431 and Opto-coupler
n Cycle-by-Cycle Current Limiting
n Built-in Leading Edge Blanking (LEB)
n LED Short Circuit Protection
n LED Open Circuit Protection
n Thermal foldback
n LED lighting
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