CXLE8186是一款高性能的白色LED驱动程序。它集成了电流源和自动模式选择电荷泵。该部分采用1×/1.5×分数电荷泵和低漏电流源，保持了高效率。小等效1×模开环电阻和极低的电流源压降，延长了1×模工作时间，优化了锂离子电池在白光LED应用中的效率。
CXLE8186支持多达8个白色LED并调节恒定电流，初始值可由内部电阻器设置。该部分实现了4位DAC，用于亮度控制。用户可以通过串行脉冲轻松配置1.65mA至27mA的LED电流。通过向EN/SET引脚施加脉冲信号，可以实现白光led电流的调光。用户可设置16级电流。工作电压范围为2.7V～5.5V，内部软启动电路有效地降低了启动和模式转换时的涌入电流。
•输入电压范围：2.7V至5.5V
•驱动高达8个LED，每个27毫安
•一个单线接口
•16步亮度控制
•通过分数转换实现高效
1×和1.5×模式
•开关频率：0.93MHz
•调节输出电流，匹配度为±4.8%
•内部软启动限制浪涌电流
•低输入纹波和低EMI
•过流和过温保护
•带滞后的欠压锁定
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[ CXLE8186 ]
目录
7.相关产品
产品概述 返回TOP
The CXLE8186 is a high performance white LED driver. It integrates current sources and automatic mode selection charge pump. The part maintains the high efficiency by utilizing a 1×/1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.The CXLE8186 supports up to 8 white LEDs and regulates a constant current which the initial value can be set by an internal resistor. The part implements a 4-bit DAC for brightness control. Users can easily configure the LED current from 1.65mA to 27mA by a serial pulse. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN/SET pin. There are totally 16 steps of current could be set by users. The operating voltage range is 2.7V to 5.5V. Internal soft-start circuitry effectively reduces the in-rush current while both start-up and mode transition.The CXLE8186 is available in Green TQFN-3×3-20L package and is rated over the -40℃ to +85℃ temperature range.
产品特点 返回TOP
• Input Voltage Range: 2.7V to 5.5V
• Drives up to 8 LEDs at 27mA Each
• One Single Wire Interface
• 16-Step Brightness Control
• High Efficiency by Fractional Conversion with
1× and 1.5× Modes
• Switching Frequency: 0.93MHz
• Regulated Output Current with ±4.8% Matching
• Internal Soft-Start Limits Inrush Current
• Low Input Ripple and Low EMI
• Over-Current and Over-Temperature Protection
• Under-Voltage Lockout with Hysteresis
• Available in Green TQFN-3×3-20L Package
应用范围 返回TOP
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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白光LED驱动器 |
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Product |
LED Connection |
CH |
Iq(μA) |
SHDN Iq(μA) |
Dimming |
Package |
|
CXLE8196 |
Common Anode |
1 |
60 |
1 |
PWM |
SOT-23-6 |
|
Common Anode |
4 |
100 |
1 |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
3 |
100 |
1 |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
4 |
240 |
1 |
PWM |
SOT-23-6 |
|
|
Common Anode |
4 |
100 |
1 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Anode |
4 |
550 |
5 |
One-Wire |
TQFN-3x3-16L TDFN-2x2-8L MSOP-8 |
|
|
Common Cathode |
4 |
300 |
10 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Anode |
6 |
210 |
1 |
One-Wire |
TQFN-3x3-16L |
|
|
Common Cathode |
6 |
300 |
10 |
One-Wire |
TQFN-4x4-16L |
|
|
Common Anode |
6 |
155 |
2.5@VIN =4.2V |
PWM |
TQFN-3x3-16L |
|
|
Common Anode |
8 |
155 |
2.5@VIN = 4.2V |
PWM |
TQFN-3x3-20L |
|
|
Common Anode |
8 |
155 |
2.5@VIN =4.2V |
One-Wire |
TQFN-3x3-20L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TSOT-23-6 |
|
|
Common Anode |
1 |
200 |
1 |
One-Wire |
TSOT-23-6 |
|
|
Common Anode |
1 |
400 |
1 |
PWM |
TDFN-2x2-6L TSOT-23-6 |
|
|
Common Anode |
1 |
45 |
1 |
One-Wire |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TSOT-23-6 |
|
|
Common Anode |
1 |
400 |
1 |
PWM |
TDFN-2x2-6L TSOT-23-6 |
|
|
Common Anode |
1 |
200 |
1 |
One-Wire |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
200 |
1 |
PWM |
TDFN-2x2-8L |
|
|
Common Anode |
1 |
220 |
1 |
PWM |
TDFN-2x2-6L |
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