L99LD20集成電路（IC）的LED驅動器規(guī)格書PDF中文資料

L99LD20屬于集成電路（IC）的LED驅動器。由意法半導體集團制造生產(chǎn)的L99LD20LED 驅動器器件屬于 LED 驅動器電源管理集成電路 (PMIC) 系列，可通過標稱固定電壓的電源為負載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c進行外部控制，可在照明應用中用于實現(xiàn)調(diào)光功能。

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

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.

Applications

? Low Beam

? High beam

? Daytime running light

? Turn indicator

? Position light

? Side marker

? Fog light