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L99LD20 Datasheet(PDF) 1 Page - STMicroelectronics |
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L99LD20 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 61 page  This is information on a product in full production. July 2018 DS11366 Rev 3 1/61 L99LD20 High power LED driver for automotive applications Datasheet - production data Features • AEC-Q100 qualified • General – ST SPI communication v4.1 – 5.5 to 24 V Operating battery voltage range – Load dump protected – QFN40L 6x6 (wettable flanks) with exposed pad – Timeout watchdog and limp home function – Low standby current • Buck section – Integrated switching mosfets – Lossless current sensing without need of external components – Very accurate LED current setting programming inductor's peak current and peak-to-peak current ripple – Adjustable peak current by SPI – Adjustable current ripple by SPI – Integrated PWM generation unit with 10-bit resolution and phase shift – Peak current control – Constant VLED x TOFF architecture • Protection and diagnostic – Battery under voltage – Temperature warning (2 thresholds) – Overtemperature shutdown – LED voltage digital feedback through SPI – Buck outputs short circuit and open load protection Applications • Low Beam • High beam • Daytime running light • Turn indicator • Position light • Side marker • Fog light Description The L99LD20 is a 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 high efficiency monolithic dual buck converter. The buck converters integrate n-channel MOSFET which is driven by a bootstrap circuit. When more than two LED channels are required on one module, then more devices L99LD20 can be combined; also with L99LD21 device – incorporating Boost Controller - from which L99LD20 derivate. www.st.com |
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