AN4501 Datasheet, PDF (1/48 Pages) STMicroelectronics – Design of a boost LED driver using L99LD01

AN4501
Application note
Design of a boost LED driver using L99LD01
Introduction
The L99LD01 is a boost controller dedicated to the control of high-brightness LEDs in
automotive headlight applications.The device offers high software configurability thanks to
its SPI interface. This scalable solution enables a cost-optimized selection of the power
components and provides full diagnostics and protection for enhanced system reliability.
Moreover, the L99LD01 can supply a microcontroller and control its reset input, while a
watchdog and a limp home input support safety relevant functions.
Figure 1. Circuit schematics in boost configuration
May 2014
DocID026394 Rev 1

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