NCV78514
features like derating based on input voltage and temperature of the LED string. The device is optimized for a one channel LED driver unit and is based on a H- Bridge topology with a synchronous Buck switches and asynchronous Boost with external low side NMOSFET and Schottky diode. Supplying in a constant current mode a single LED string between 2 and 20 LEDs.
This enables the design of a single PCB design solution or with a separate module approach.
The LED string current is set with a current- encoding resistor. The actual current through the LED string is sensed with a sense resistor.
Features
- Support for MCU Less Application
- Integrated Derating Mechanisms
- Fixed Switching Frequency at 400 k Hz
- Input Operating Range from 5 V
- 21 V
- Warm Start Management below 9 V
- Withstands Load Dump up to 45 V
- Output Voltage Range up to 60 V
- External Programmable Current 200 m A
- 1500 m A
- Pulse Width Modulation from 80 Hz to 600 Hz
- LED Current Dimming Frequency 400 Hz
- External NTC...
