位置:RT4539AWSC > RT4539AWSC详情

RT4539AWSC中文资料

厂家型号

RT4539AWSC

文件大小

1125.91Kbytes

页面数量

39

功能描述

39V High Efficiency Boost Converter with I2C Controlled 6-CH LED Driver

数据手册

下载地址一下载地址二到原厂下载

生产厂商

RICHTEK

RT4539AWSC数据手册规格书PDF详情

General Description

The RT4539A is a high efficiency driver for white LEDs. It is suitable for single/two cell battery input to drive LED light bars which contains six strings in parallel. The internal current sinks support a maximum of ±2 current mismatching for excellent brightness uniformity in each string of LEDs. To provide enough headroom for current sink operation, the Boost converter monitors the minimum voltage of the feedback pins and regulates an optimized output voltage for power efficiency.

The RT4539A has a wide input voltage operating range from 2.7V to 24V and contains I2C interface for controlling the dimming mode, operating frequency and the LED current. The internal 250mΩ, 39V power switch with current-mode control provides over-current protection. The switching frequency of the RT4539A is adjustable from 300kHz to 1.6MHz, which allows flexibility between efficiency and component size.

The RT4539A are available in the WL-CSP-20B 1.71x2.371 (BSC) and WQFN-24L 4x4 packages.

Applications

 Tablet and Notebook Backlight

Features

 Wide Operating Input Voltage: 2.7V to 24V

 High Output Voltage: Up to 39V

 Programmable Channel Current: 10.04mA to 35mA

 Channel Current Regulation with Accuracy ±3 and Matching ±2

 Dimming Controls

 Direct PWM Dimming up to 20kHz and Minimum On-Time to 400ns

 PWM to Analog Dimming up to 20kHz with 9-bit Resolution

 PWM Pin and/or I2C-Controlled with Programmable Linear@12 bits or Exponential@11 bits Brightness Control

 Digitally Advanced Sloping for Smooth Dimming

 Adjustable Dimming Mode Control.

 Adjustable Advanced Brightness Control.

 Adjustable Switching Frequency of Boost Converter from 300kHz to 1.6MHz.

 PFM function for High Efficiency at Light Load

 Programmable Spread Spectrum Scheme and Edge Rate Control Minimize Switching Noise and Improve EMI Performance

 Protections

 LED Strings Open Detection

 LED Strings Short Protection

 Programmable Current Limit of Boost.

 Programmable Over-Voltage Protection Level

 Over-Temperature Protection

 Integrated Memory by MTP

 20-Ball WL-CSP, with pitch 0.4mm and 24-Lead WQFN Packages

更新时间:2025-10-18 17:57:00
供应商 型号 品牌 批号 封装 库存 备注 价格
RICHTEK/立锜
2450+
NA
6885
只做原装正品假一赔十为客户做到零风险!!
RICHTEK/立锜
24+
QFN
60000
全新原装现货
RICHTEK(立锜)
24+
QFN
7350
现货供应,当天可交货!免费送样,原厂技术支持!!!
RICHTEK/立锜
21+
QFN
20000
百域芯优势 实单必成 可开13点增值税发票
RICHTEK/立锜
2022+
QFN
15000
原厂代理 终端免费提供样品
RICHTEK/立锜
1347+
QFN
50
原装现货
RICHTEK/立锜
25+
QFN
54658
百分百原装现货 实单必成
RICHTEK/立锜
22+
QFN
100000
代理渠道/只做原装/可含税
RICHTEK/立锜
23+
QFN
89630
当天发货全新原装现货
RICHTEK/立锜
25+
QFN
880000
明嘉莱只做原装正品现货