DESCRIPTION

· L99LD01 is a high-efficiency constant current DC-DC converter LED driver for automotive applications, specifically designed for high-brightness LED headlights.

· It supports Boost, Buck-Boost, and Flyback converter topologies.

· The device features an internal random dither oscillator for EMC reduction and slope compensation for loop stability.

· It includes a low drop voltage regulator for microcontroller supply and a reset pin for system initialization.

FEATURES

· Automotive qualified with constant current operation.

· LED current settable via external resistor and adjustable via SPI.

· Converter switching frequency adjustable by external resistor.

· Includes EMC reduction, low frequency PWM dimming, and maximum input current limiter.

· Features battery overvoltage shutdown and LED chain overvoltage detection.

· Multiplexed output for monitoring LED temperature and voltage.

· SPI interface for parameter programming and internal memory settings.

APPLICATIONS

· Automotive daytime running lights.

· LED headlamps.