CXLE8168 PWM和Analog两种调光宽输入升降压白光LED驱动器宽输入电压范围为驱动白光LED设计的恒流升压转换器6～25V输入电源可编程的软启动

CXLE8168是一款具有宽输入电压范围、专为驱动白光LED设计的恒流升压转换器。凭借其特殊的拓扑结构，芯片提供的负载电压既可以高于输入电压，又可以低于输入电压。芯片可以同时对多路串、并联的LED提供精准的电流调制。CXLE8168具有Analog/PWM两种模式的亮度调节功能，只需要在CTRL引脚加入Analog/PWM信号即可对LED亮度进行控制。芯片的工作频率高达1MHz，结合以脉宽调制（PWM）的工作模式，在保证最小输入纹波的情况下允许用户使用较小的输入/输出电容和电感。可编程的软启动能够消除芯片启动时的浪涌电流。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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      CXLE8168是一款具有宽输入电压范围、专为驱动白光LED设计的恒流升压转换器。凭借其特殊的拓扑结构，芯片提供的负载电压既可以高于输入电压，又可以低于输入电压。芯片可以同时对多路串、并联的LED提供精准的电流调制。CXLE8168具有Analog/PWM两种模式的亮度调节功能，只需要在CTRL引脚加入Analog/PWM信号即可对LED亮度进行控制。芯片的工作频率高达1MHz，结合以脉宽调制（PWM）的工作模式，在保证最小输入纹波的情况下允许用户使用较小的输入/输出电容和电感。可编程的软启动能够消除芯片启动时的浪涌电流。CXLE8168采用8-pin 3mmx3mm TDFN封装。The CXLE8168 is a constant current boost converter specially designed for driving white LEDs with wide input range. The unique converter topology provide a load voltage which can be greater or less than the input voltage. With the tightly regulated load current, the CXLE8168 allows series connection with multiple strings of the white LEDs. The brightness of the LEDs can be adjusted through a voltage level on the CTRL pin or by applying a PWM signal to CTRL pin. 1MHz current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup. The CXLE8168is available in a space-saving, 8-pin 3mm x 3mm TDFN package.

   产品特点 返回TOP

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• 6～25V输入电源电压

• 32V过压保护

• 效率高达90%

• PWM和Analog两种调光方式

• 高压功率管内置

• 1MHz开关频率

• 小尺寸外围电感、电容

• 3mm × 3mm TDFN8封装

• 符合RoHS规范及Pb-Free

 6V to 25V Input Range

 32V (typ.) Output with Overvoltage Protection

 Up to 90% Efficiency

 Flexible Analog or PWM Dimming Control

 Internal High Power MOSFET Switch

 1MHz PWM Operation

 Small, Low-Profile Inductors and Capacitors

 3mm× 3mm TDFN-8 Package

 RoHS Compliant and 100% Lead (Pb)-Free

   应用范围 返回TOP

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• 7~10吋白光LED背光显示驱动

• 12V汽车显示系统

• PDVD和微型笔记

• LED照明设备

 7~10 inch White LED Display Backlighting

 12V Automotive Display System

 PDVD and Subnotebooks

 LED Lighting

   技术规格书（产品PDF) 返回TOP 

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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
Part   Number	remark	Vin (V)	Vout  (max)(V)	FB(V)	IQ(mA)	Isw(A)	Max LED	Peak  Efficency  (%)	Package
CXLE8167	Small Package, High Performance, Asynchronies Boost for WLED Driver	2.6~5.5	18	0.2	0.4	2	15P3S	93	TSOT23-5
CXLE8168	White LED Driver For Buck-Boost Application	6~25	32	Vctrl/10	1.3	1.4	3 x 9 = 27	90	TDFN-8
CXLE8169	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
CXLE8170	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
CXLE8171	10 White LED Boost Converter with PWM Dimming	2.5~5.5	38.5	0.2	0.3	1.3	12	88	TSOT23-6
CXLE8172	6 String White LED Driver with Boost Converter	2.5~24	43	0.5	2	2.5	6 × 10= 60	90	TQFN-20
CXLE8173	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
CXLE8174	12 String White LED Driver With Boost Controller	4.5~28	65	0.6	1.5	-	216	93	TSSOP-28(EP)