A8511
FEATURES
AND BENEFITS
- Four LED sinks rated for 150 m A each (600 m A total)
- Boost converter with integrated 40 V DMOS switch and
OVP- load-dump protection
- 600 k Hz to 2.2 MHz switching frequency- ability to operate above the AM band
- Internal bias supply for single-supply operation (VIN= 6.8 to 21 V)
- 3.5 µA shutdown current- limits battery drain
- Active current sharing between LED strings for
0.8% current matching and 0.7% accuracy
- PWM dimming with LED PWM duty cycle control
- 4000:1 dimming range
- Extensive fault mode protection schemes:
▫ Shorted LED protection against misconnected loads- with true output disconnect
▫ Open LED disconnect protects against LED failures ▫ External thermistor sensing to limit LED temperature ▫ Output overvoltage protection (OVP): 19.5 V default can be adjusted as high as 38 V ▫ Open Schottky and open OVP resistor protection against external ponent failure ▫ Input under- and overvoltage protection (UVLO and
OVLO) against VIN variation ▫ Boost...
