AL9902 Overview
The AL9902 high-voltage PWM LED driver provides an efficient solution for offline high-brightness LED lamps from rectified line voltages ranging from 85VAC up to 277VAC. The AL9902 has an internal MOSFET that allows switching frequencies up to 300kHz, with the switching frequency determined by an external single resistor. The AL9902 topology creates a constant current through the LEDs providing constant light output.
AL9902 Key Features
- >90% Efficiency
- Universal Rectified 85 to 277VAC Input Range
- Internal MOSFET Up to 650V, 2A
- High Switching Frequency Up to 300kHz
- Internal Voltage Regulator Removes Start-Up Resistor
- 7.5V Regulated Output
- Tighter Current Sense Tolerance Better Than ±5%
- LED Brightness Control with Linear and PWM Dimming
- Internal Over-Temperature Protection (OTP)
- U-DFN6040-12 and SO-16 Packages