L99LD20 21 High Power LED Driver

Product Highlights > L99LD20/21 High-Power LED Drivers

            L99LD20/21 High-Power LED Drivers
                    STMicroelectronics' L99LD20 and L99LD21 flexible LED drivers for automotive front lighting applications
    

Image of STMicroelectronics' L99LD20/21 High Power LED Drivers STMicroelectronics' L99LD20 is a fully integrated and flexible LED driver, which is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a dual buck converter.

STMicroelectronics' L99LD21 is a flexible LED driver is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a high-efficiency monolithic boost controller and a dual buck converter.

The integrated serial peripheral interface (SPI) offers a high level of flexibility making it possible to adjust device parameters (supporting generic platform approaches), control all operating modes, and read out diagnostic information.

Features

Family devices (L99LD21/20) fully configurable and pin-to-pin compatible
Shunt-less buck converter
Low external component count
Onboard OTP (for limp-home function, to preserve fail-safe mode operation)
Standby mode with low quiescent current consumption
Watchdog supervising SPI bus communication
High-frequency 32-bit SPI bus (to reduce bus load)
Simplified thermal layout (no external thermal sensors)
Powerful internal PWM unit
LED current analog dimming without flickering
Fast LED output voltage reading for better dynamic behavior

Applications

Exterior automotive lighting - front LED lighting:
- Low beam
- High beam
- Daytime running light
- Turn indicator
- Position light
- Side marker
- Fog light