Datasheet > ALED1262ZT

ALED1262ZT

更新时间： 2024-11-19 14:58:07

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		驱动驱动器
页数	文件大小	规格书
69页	3366K
描述
汽车级12通道LED驱动器，支持开路检测、局部调光、总线驱动和独立操作

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中文翻译

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ALED1262ZT 数据手册

ALED1262ZT

Datasheet

Automotive-grade 12-channel LED driver with open detection, local dimming, bus

driven and standalone operations

Features

•

Designed for automotive applications

12 constant current output channels

19 V current generator rated voltage

Output current: from 6 mA to 60 mA

HTSSOP24 exposed pad

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

Applications

•

Automotive rear lights

Automotive interior lighting

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.

Maturity status link

ALED1262ZT

Device summary

ALED1262ZT

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.

Order code

Package

Packing

ALED1262ZTTR

HTSSOP24 exposed pad

62 parts per tube

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.

2500 parts per reel

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

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

DS12631 - Rev 4 - February 2019

For further information contact your local STMicroelectronics sales office.

www.st.com

12 3 4 5 6 7...69

中文翻译

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