A8504
A8504 is WLED/RGB Backlight Driver manufactured by Allegro MicroSystems.
A8504 WLED/RGB Backlight Driver for Medium Size LCDs
Features and Benefits
- Active current sharing among 8 LED strings for ±1.3% typical current matching
- ±1.2% typical current accuracy
- Drive up to 11 series × 8 parallel = 88 LEDs
(Vf = 3.5 V, If = 40 mA)
- External PWM control for LED dimming
- An external resistor for LED current setting
- Boost converter with integrated 50 V, 2 A DMOS
- LED sinks rated for 45 mA
- 200 kHz to 2 MHz switching frequency
- Open LED disconnect
- Boost current limit, thermal shutdown, and soft start
- No audible ceramic capacitor noise during PWM dimming
- Adjustable overvoltage protection (OVP)
- No pull-up resistors required for LED modules that...
