Diodes' AL3065 is a high-efficiency 4-channel boost controller for WLED backlight applications. It operates over a wide input voltage range from 4.5 V to 33 V.  The current of the four channels is simply programmed from 20 mA to 400 mA with an external resistor. The current match between any channel is ±1.5% (typical). Its operating frequency can be adjusted from 0.1 MHz to 1 MHz. The AL3065 can support three dimming modes: direct PWM dimming, PWM to analog dimming, and DC 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 V_OUT short protection. The IC is available in SO-16 package.