Diodes' AL3065A is a highly integrated 4-channel sink boost controller with a wide voltage operating range from 4.5 V to 33 V. The current of each channel is easily programmable from 20 mA to 400 mA with an external resistor. The current match between any channels is ±0.5% (typical). Its operating frequency can be adjusted from 0.1 MHz to 1 MHz.
The AL3065A can be dimmed through three different modes: direct PWM dimming, PWM-to-analog dimming, or DC-to-analog dimming.
The AL3065A has full protection functions including cycle-by-cycle current limit, soft-start, undervoltage lockout (UVLO), programmable overvoltage protection (OVP), overtemperature protection (OTP), open/short LED protection, Schottky diode short and open protection, inductor short-circuit protection, and VOUT short protection.
Features
- Input voltage range: 4.5 V to 33 V
- Operates from 5 V, 12 V, and 24 V power supply rails
- Drive 4 LED strings at 250 mA per string, 400 mA pulse current max
- Drive multi-channels up to 4 strings with 400 mA pulse current and wide dimming capability
- Operating frequency adjustable from 0.1 MHz to 1 MHz
- Supports flexible operating frequency to choose suitable inductor and optimize EMI solution
- Supports analog and direct PWM (10,000:1) dimming controls
- Versatile and wide dimming range for large panel brightness variations
- Best-in-class channel matching:
- Current match between any channel is ±0.5% at IOUT = 55 mA/CH
- Current match between any channel is ±1.5% at IOUT = 5.5 mA/CH
- Full protections:
- Built-in soft-start UVLO, programmable OVP, OCP, OTP, open/short LED protection, VOUT short, Schottky diode open/short protection, and inductor short-circuit protection