CXLE8172是一款用于中等尺寸LCD面板的LED背光驱动器，其内部集成了高效率升压转换器，同时提供6通道LED电流驱动电路。CXLE8172内置峰值电流2.5A/43V的MOSFET，采用电流模式架构，可同时驱动每路10个LED，共6路LED。升压转换器开关频率可由外接电阻进行设定。利用外接电阻可设定CXLE8172 6个通道LED电流，同时6通道间LED电流匹配达±1.5%，每一通道LED电流精度高达±2%，此性能保证了LED背光亮度的均一性与精确性。为了保证LED驱动电路的正常工作，升压转换器会采样6通道中最小的反馈电压来产生合适的输出电压。CXLE8172具有2.5V～24V宽的输入电压范围，可提供5mA～50mA的LED电流，还有峰值电流限制功能。采用PWM和模拟混合调光模式实现LED电流的精确控制。CXLE8172内置多种保护功能，如LED开路/短路、输出过压、过温关断和欠压保护，这些保护能有效的防止LCD背光的失效和损坏
[ CXLE8172 ]
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产品概述 返回TOP
产品特点 返回TOP
‧输入电压范围：2.5-24V
‧可同时驱动6路每路10个WLED
‧集成2.5A/43V MOSFET
‧输出电压可达43V
‧外部可调5mA~50mA LED电流
‧PWM 调光频率可达20kHz
‧PWM 转模拟调光模式调光频率可达20kHz，具有8位分辨率的精度
‧每路LED之间2%的精度
‧多种故障保护
- 过流保护
- 过压保护
- 过温保护
- LED开路/短路保护
‧3mm×3mm TQFN-20封装
‧符合RoHS规范及Pb-Free Halogen-Free
2.5V to 24 V Input Voltage
6 Strings in Parallel and Up to 10 WLEDs Per
String
Integrated 2.5A 43V MOSFET
Output Voltage Up to 43V
Programmable Full Channel Current from 5mA to 50mA
Direct PWM Dimming up to 20kHz
PWM to Analog Dimming up to 20kHz with 8 bit resolution
Better Than 2% Current Regulation Accuracy
Between Strings
Multiple Fault Protections
-Current Limit Protection
-Over Voltage Protection
-Over Temperature Protection
-WLED Open/Short Protection
Available in 3mm×3mm TQFN-20 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
应用范围 返回TOP
‧笔记本LCD背光显示
‧个人电脑LCD背光显示
Notebook LCD Display Backlight
UMPC LCD Display Backlight
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产品封装图 返回TOP
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电路原理图 返回TOP
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白光LED驅動器 > LED背光 |
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Part Number |
remark |
Vin (V) |
Vout (max)(V) |
FB(V) |
IQ(mA) |
Isw(A) |
Max LED |
Peak Efficency (%) |
Package |
|
Small Package, High Performance, Asynchronies Boost for WLED Driver |
2.6~5.5 |
18 |
0.2 |
0.4 |
2 |
15P3S |
93 |
TSOT23-5 |
|
|
White LED Driver For Buck-Boost Application |
6~25 |
32 |
Vctrl/10 |
1.3 |
1.4 |
3 x 9 = 27 |
90 |
TDFN-8 |
|
|
White LED Boost Converter with PWM Dimming and Single-Wire Interface |
2.7~5.5 |
38 |
0.2 |
0.35 |
1.3 |
12 |
91 |
TDFN-6 |
|
|
10 White LED Boost Converter with PWM Dimming and Single-Wire Series Interface |
2.5 ~ 5.5 |
38.5 |
0.2/0.3 |
0.3 |
1.3 |
12 |
88 |
TSOT23-6,SOT23-6 |
|
|
10 White LED Boost Converter with PWM Dimming |
2.5~5.5 |
38.5 |
0.2 |
0.3 |
1.3 |
12 |
88 |
TSOT23-6 |
|
|
6 String White LED Driver with Boost Converter |
2.5~24 |
43 |
0.5 |
2 |
2.5 |
6 × 10= 60 |
90 |
TQFN-20 |
|
|
4 Strings High Current White LED Driver with Boost Controller |
4.5~28 |
65 |
0.6 |
0.75 |
- |
4 x 18 =72 |
93 |
SOP-16 |
|
|
12 String White LED Driver With Boost Controller |
4.5~28 |
65 |
0.6 |
1.5 |
- |
216 |
93 |
TSSOP-28(EP) |
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