Datasheet > AS3824

AS3824

更新时间： 2023-12-20 18:46:18

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
9页	660K
描述
16-Channel Local Dimming LED Backlight Controller

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AS3824 数据手册

AS3824

16-Channel White LED Controller for LCD Backlight

1 Description

The AS3824 is a 16 channel high precision LED controller for use in LCD-backlight panels. Dynamic power feedback

controls the external power supply to guarantee best eﬃciency. One high accurate global 10 bit DAC can be used

to set the LED current as well as each channel has its own additional 8 bit DAC to boost the dynamic range of LED

Backlight systems.

Each channel is equipped with an independent PWM generator which can also be synchronized to an external

synchronization signal (VSYNC).

A fast mode supports minimum PWM duty cycle operation which helps to further reduce the energy consumption of

modern LED Backlight systems.

The PWM generator clock can be generated internally (DPLL) or an external clock source can be connected to the

HSYNC input.

Built-in safety features include thermal shutdown as well as open and short LED detection. The device is

programmable via serial interface (SPI).

2 Features

● Global dimming mode option

● Supports all LED backlight topologies

AS3824E/E1 are pre-programmed as external PWM

mode (DPWM mode), V_SYNCpin is used as PWM

input. AS3824A/A1 are pre-programmed as SPI mode

No limit of VLED or ILED, device is not exposed to

high voltage/high current

● Optimum power savings through local dimming

● VSYNC and HSYNC inputs, as well as integrated

16 fully ﬂexible 12 bit PWM generators (period, high

time, delay, reverse)

digital PLL for synchronization with TV frame

● Lowest BOM

● One global highly accurate 10 bit DAC which sets the

Due to 2 pin concept of the output channel: no HV

protection, no cascade FETs

LED current (±0.5% accuracy)

● High dynamic range boost function

● Feedback function is compatible to every DC-DC

16 independent 8 bit DACs can be used to boost/

decrease LED current within certain frames

architecture and conﬁgurable via SPI

● Short/OPEN LED detection, temperature shutdown,

3 Applications

● HD TVs

● UHD TVs

● LCD Monitors

01-Sep-2023

Product Summary

Rev. 1.2

www.renesas.com

1 of 9

12 3 4 5 6 7...9

下载PDF

与AS3824相关器件

型号	品牌	描述	获取价格	数据表
AS3833	AMSCO	6 channel high-precision LED cont rol ler for 3D-LCD backl ight with integrated step-up co	获取价格
AS3833-ZSOT	AMSCO	6 channel high-precision LED cont rol ler for 3D-LCD backl ight with integrated step-up co	获取价格
AS3833-ZTQT	AMSCO	6 channel high-precision LED cont rol ler for 3D-LCD backl ight with integrated step-up co	获取价格
AS3834	AMSCO	4 channel high-precision LED cont rol ler for 3D-LCD backl ight wi th	获取价格
AS3834-ZSOT	AMSCO	4 channel high-precision LED cont rol ler for 3D-LCD backl ight wi th	获取价格
AS3834-ZTQT	AMSCO	4 channel high-precision LED cont rol ler for 3D-LCD backl ight wi th	获取价格