OB3671AZ is a high performance driver with advanced features to provide high efficiency control to remove/suppress the 100/120 Hz current ripple for LED lighting applications.

OB3671AZ integrates a 100V MOSFETand the LED current is recommended to set below 0.5A. It controls the internal MOSFET drain voltage to minimize power dissipation while suppressing current ripple.

OB3671AZ allows user to set up maximum LED current by the sensing the resistor between CS pin and ground. It also allows user to set up the maximum cathode voltage of LED string via a resistor between the drain of the DRAIN pin and LEDN pin.

OB3671AZ offers comprehensive protection coverage with features including LED open loop protection, LED short circuit protection, current limiting, VCC under voltage lockout (UVLO), comp floating protection, over temperature protection etc.

OB3671AZ supports current dimming from 100% to 5%.

OB3671AZ is offered in ESOP-8 package.


n Driver for 100/120Hz current ripple removal/suppress

n Integrated 100V MOSFET

n Programmable maximum LED current

n Built in VCC voltage clamping

n Supports wide dimming range: 5%-100%

n Supports hot-plug

n LED short protection with programmable threshold

n VCC under voltage lockout (UVLO)

n Comp floating protection

n Over temperature protection

n ESOP-8 Package



n LED lighting