AL9901
UNIVERSAL HIGH
VOLTAGE LED DRIVER
Description
The AL9901, high-
voltage PWM LED driver provides an efficient solution for offline, high-brightness LED lamps for rectified line
voltages ranging from 85VAC up to 305VAC.
The AL9901 has an internal
MOSFET that allows switching frequencies up to 300kHz, with the switching frequency determined by an external single resistor.
The AL9901 topology creates a constant current through the LEDs providing constant light output.
The output current is programmed by one external resistor.
The LED brightness can be varied by both Linear and PWM dimming, using the AL9901’s LD and PWM pins respectively.
The PWM input operates with a duty ratio of 0-100% ...