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.