CXLE8191是一款多功能恒流LED驱动器，具有高效的升压转换器结构。该器件集成了低功耗MOSFET，显著缩小了PCB的整体布局面积，减少了外部元件的总数。独特的技术和高1.35A电流限制允许CXLE8191驱动高达38V的输出（10个LED串联）。或者，CXLE8191可以提供260毫安的总电流，每串3个系列LED。它还可以最大限度地提高电流能力，同时实现高转换效率。优化后的1MHz开关频率降低了传导损耗，减小了外部元件尺寸。集成数字PWM调光接口，调节LED电流。脉宽调制频率在2kHz到60kHz之间。
CXLE8191内置多种保护功能，包括逐周输入电流限制保护、开路LED（输出过电压）保护和热关机保护。关闭模式下的泄漏电流小于1μA。
•宽输出范围：最多10个串联LED
•集成40V大电流开关（1.35A限制）
•2.7V至5.5V输入电压范围
•高效的PWM转换器
•低200毫伏反馈电压
•控制销上的500kΩ拉低电阻
•2kHz至60kHz的脉宽调制调光频率
•38V开放式LED保护
•1MHz开关频率
•集成软启动功能
•小于1μA的关闭电流
•简单、体积小的解决方案
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[ CXLE8191 ]
目录
7.相关产品
产品概述 返回TOP
The CXLE8191 is a versatile constant current LED driver with a high efficiency step-up converter architecture. The low-side power MOSFET is integrated in the device, significantly shrinking the overall PCB layout area and minimizing the total number of external components. Unique technology and high 1.35A current limit allow CXLE8191 to drive up to 38V output (10 LEDs in series). Alternatively, CXLE8191 can deliver 260mA total current with 3 series LEDs per string. It can also maximize the current capability while achieving high conversion efficiency. The optimized 1MHz switching frequency results in reduced conduction loss and small external component size. Digital PWM dimming interface is integrated to adjust LED current. The PWM frequency is in the range from 2kHz to 60kHz.Various protection features are built into the CXLE8191, including cycle-by-cycle input current limit protection, open LED (output over-voltage) protection and thermal shutdown protection. The leakage current in shutdown mode is less than 1μA.The CXLE8191 is available in Green TSOT-23-6 package. It operates over an ambient temperature range of -40℃ to +85℃.
产品特点 返回TOP
• Wide Output Range: Up to 10 Series LEDs
• Integrated 40V High Current Switch (1.35A Limit)
• 2.7V to 5.5V Input Voltage Range
• High Efficiency PWM Converter
• Low 200mV Feedback Voltage
• 500kΩ Pull-Low Resistor on CTRL Pin
• 2kHz to 60kHz PWM Dimming Frequency
• 38V Open LED Protection
• 1MHz Switching Frequency
• Integrated Soft-Start Function
• Less than 1μA Shutdown Current
• Simple, Small Solution Size
• Available in Green TSOT-23-6 Package
• -40℃ to +85℃ Temperature Range
应用范围 返回TOP
LED Backlighting
Mobile Phones
Handheld Devices
Digital Photo Frames
Automotive Navigation
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
相关芯片选择指南 返回TOP 更多同类产品......
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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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下一篇▶:CXLE8192脉宽调制亮度控制40V额定集成开关FET串联驱动LED的升压转换器600kHz的固定开关频率减少输出纹波提高转换效率
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