The AL3066 is a high efficiency 4-channel boost controller for WLED backlight applications. It operates over a wide input voltage ranged from 4.5V to 33V. The current of the 4 channels is simply programmed from 20mA to 400mA with an external resistor. The current match between any channel is ±1.5% (typical). Its operating frequency can be adjusted from 0.1MHz to 1MHz. The AL3066 can support two dimming modes: direct PWM dimming, PWM to analog dimming. Robust protection features include cycle by cycle current limit, soft-start, UVLO, programmable OVP, OTP, open/short LED protection, Schottky Diode Short and Open Protection, Inductor Short-Circuit Protection and VOUT Short protection. The IC is available in SO-16 package.

Input Voltage Range: 4.5V to 33V
Drivers up to 4 Strings in Parallel, 250mA per String, 400mA Pulse Current
±3% Current Precision
Low Ripple for Low BOM Cost
4KV HBM ESD Class
High Voltage Pins CS and OVP for Safety Test
Support Direct PWM Dimming, PWM to Analog Dimming
Minimum PWM Dimming Duty Cycle can be 1/10,000 at 100Hz Dimming Frequency
LED Open/Short Protection
Schottky Diode/Inductor Short-Circuit Protection
Built-in OCP, OVP, OTP, UVLO, VOUT Short/Schottky Diode Open Protection
Applications
LCD Monitor
LCD Display Module
LCD TV