ALED1262ZT集成電路（IC）的LED驅(qū)動(dòng)器規(guī)格書PDF中文資料

ALED1262ZT屬于集成電路（IC）的LED驅(qū)動(dòng)器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的ALED1262ZTLED 驅(qū)動(dòng)器器件屬于 LED 驅(qū)動(dòng)器電源管理集成電路 (PMIC) 系列，可通過標(biāo)稱固定電壓的電源為負(fù)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?duì)器件工作點(diǎn)進(jìn)行外部控制，可在照明應(yīng)用中用于實(shí)現(xiàn)調(diào)光功能。

Features

? Designed for automotive applications

? 12 constant current output channels

? 19 V current generator rated voltage

? Output current: from 6 mA to 60 mA

? Current programmable by a single external resistor

? 7-bit PWM local brightness control

? Slow turn-on/off time, gradual output delay and dithered clock for EMI reduction

? Error detection for open LEDs

? Supply voltage: from 5.5 V to 38 V

? Thermal shutdown and overtemperature alert

? Standalone and bus-driven mode

? Custom configuration by OTP with Redundancy and ECC

? 400 kHz fast I2C interface with selectable extended Hamming encoding

? Wired-OR error flag connection

Description

The ALED1262ZT is a monolithic 12 output LED driver designed for automotive

exterior and interior lighting applications. The ALED1262ZT guarantees 19 V output

driving capability allowing users to connect several LEDs in series. In the output

stage, twelve regulated current sources provide from 6 mA to 60 mA constant current

to drive LEDs. The current is programmed by a single external resistor. In the

ALED1262ZT, LED open error detection is available.

The brightness can be adjusted separately for each channel through a 7-bit

grayscale control. A slow turn-on and turn-off time improves the system low noise

generation performance. Moreover the gradual output delay reduces the inrush

current. To further increase EMI performance, this device implements an internal

clock dithering to have a spread spectrum noise reduction.

Thermal management is equipped with overtemperature data alert and the output

thermal shutdown (170 °C). The I2C high clock frequency, up to 400 kHz, makes the

device suitable for high data rate transmissions. The supply voltage range is between

5.5 V and 38 V avoiding any external pre-regulation or additional load dump

protection on the power supply stage.

This device can operate in bus-driven mode (BDM) using I2C interface or in

standalone mode (SAM) using internal custom configuration by OTP.

Applications

? Automotive rear lights

? Automotive interior lighting