CXLE81111监控最高LED正向电压串HB-LED背光驱动程序控制4个LED电流通道LCD背光应用4个通道驱动每个通道20毫安至150毫安100Hz至25kHz调光频率电流模式增压控制器50kHz至2MHz可编程开关频率

CXLE81111是一款集成HB-LED背光驱动程序，可控制4个LED电流通道，用于LCD背光应用，如LCD电视和LCD显示器。CXLE81111能够驱动20毫安到150毫安的白色LED。CXLE81111的4个电压控制电流通道采用2%的电流匹配来补偿LED堆栈中正向电压变化的不均匀效应。为了最小化典型多串操作中的电压余量和功率损耗，CXLE81111监控最高LED正向电压串，并使用其反馈信号进行输出调节。SETI引脚用于编程最大LED电流。通过驱动具有PWM信号的调光管脚，可以实现高对比度的真PWM调光。LED电流与暗管脚占空比成正比。cxl81111具有广泛的保护功能，包括OLP、SLP、OCP、OVP和OTP。
·4个通道
驱动每个通道20毫安至150毫安
·100Hz至25kHz调光频率
·电流模式增压控制器
10V至30V输入电源
·50kHz至2MHz可编程开关频率
外部开关频率同步
·当前匹配2%
·最高Vf串检测调节
·保护：
打开LED保护（OLP）
短路LED保护（SLP）
切换电流保护（OCP）
输出过压保护（OVP）
过热保护（OTP）
TSSOP-20

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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The CXLE81111 is an integrated HB-LED backlight driver that controls 4 channels of LED current for LCD backlight applications such as LCD TV and LCD monitor. The CXLE81111 is capable for driving 20mA to 150mA white LEDs. The CXLE81111’s 4 channels of voltage controlled current sinks with 2% current matching compensate for the non-uniformity effect of forward voltage variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the CXLE81111 monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. A SETI pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving DIM pin with a PWM signal. LED current is proportional to the DIM pin duty. The CXLE81111 features extensive protection functions that include OLP, SLP, OCP, OVP and OTP. It is available in a TSSOP-20 (FD) package.

   产品特点 返回TOP

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„ 4 Channels 

„ Drive 20mA to 150mA Each Channel 

„ 100Hz to 25kHz Dimming Frequency 

„ Current Mode Boost Controller 

„ 10V to 30V Input Supply 

„ 50kHz to 2MHz Programmable Switching Frequency 

„ External Switching Frequency Synchronization 

„ Current Matching 2% 

„ Highest Vf String Detection for Regulation 

„ Protections: 

Š Open LED Protection (OLP) 

Š Short LED Protection (SLP) 

Š Switch Over Current Protection (OCP) 

Š Output Over Voltage Protection (OVP) 

Š Over Temperature Protection (OTP) 

„ TSSOP-20 (FD) Package 

„ RoHS Compliant

   应用范围 返回TOP

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„ LCD TV LED Backlighting 

„ LCD Monitor LED Backlighting

   技术规格书（产品PDF) 返回TOP 

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     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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LED   Backlight Driver
Part  NO.	Vin(V) min.	Vin(V) max.	CH	VOUT (max)	ISW (A)	FSW (kHz)	VLED FB(V)	Note	Package
CXLE8198	2.5	5.5	1	20	1.2	1000	0.1/0.2 / 0.3	LX,GND,FB,EN,OVP,VIN,EN Dimming  100~200kHz,6SxP	TSOT23-6
CXLE8199	2.5	5.5	1	40	1.2	1000	0.2	LX,GND,FB,EN,OVP,VIN,EN Dimming  100~200kHz	TSOT23-6
CXLE81100	4.2	24	6	40	2	600	1.25	30mA/CH,Dimming 100~25kHz,EN,OCP, OVP,PWM/DC/Mixed DimmingMode	TQFN4X4-20
CXLE81101	2.7	5.5	6	40	2	600	1.25	30mA/CH,Dimming 100~25kHz,EN,OCP, OVP,PWM/DC/Mixed Dimming Mode	TQFN4X4-20
CXLE81102	2.5	20	1	20	1.2	1000	0.2	OVP,FB,DIMC,GND,LX,BP,PWM, EN,PWM Dimming 100~200kHz,6SxP	TDFN2X2-8
CXLE81103	2.5	5.5	1	40	1.2	1000	0.2	LX,GND,FB,EN,OVP,VIN,EN Dimming  100~200kHz	SOT23-6
CXLE81104	2.7	5.5	1	28	0.85	1000	0.2	LX,GND,FB,EN,OVP,IN	TDFN2X2-8/SOT-23-6
CXLE81105	2.7	7	1	26	0.7	600	0.2*EN Duty	FB,COMP,GND,LX, EN,VIN,5k~100kHz EN BrightnessControl	TDFN2X2-6
CXLE81106	2.7	7	1	38	0.7	600	0.2*EN Duty	FB,COMP,GND,LX, EN,VIN,5k~100kHz EN BrightnessControl	TDFN2X2-6
CXLE81107	5	24	6	40	2	1000	1.23	30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP,SLP	TQFN3X3-16
CXLE81107L	3.2	24	6	40	2	1000	1.23	30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP,SLP	TQFN3X3-16
CXLE81108	5	24	6	50	2	750	1.23	30mA/CH, PWM   dimming, EN,SS, OCP,OVP,OTP,OLP	TQFN4X4-20
CXLE81109 B/C/L	4.2	24	8	48	3	1000	0.6	30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP	TQFN4X4-24 TSSOP20(FD)
CXLE81110	7	18	1	EXT	VCS  SET	ADJ	1.2	Programmable ILED, PWM Dimming, Hiccup mode for OVP,SCP	SOP-16
CXLE81111	10	30	4	EXT	VCS  SET	ADJ	0.8	20mA~150mA/CH,   PWM dimming,EN, SS,OCP,OVP,OTP, OLP,SLP	TSSOP20(FD)
CXLE81112 /A	7	27	4	EXT	VCS  SET	ADJ	1.23	Programmable   ILED,True PWM& Analog Dimming,Hiccup mode for OVP,OLP, SLP	TQFN4X4-24 TQFN4X4-28
CXLE81113 /4	5	28	12	EXT	VCS  SET	ADJ	0.6	60mA/CH G5997,120mA/CH G5999 Analog& PWM Dimming,Slope comp.,OCP,UVP,OTP, Hiccup mode for OVP,SLP	SOP28/TSSOP18(FD)/TQFN5X5-28