通道全电流可编程8通道功率LED背光驱动程序CXLE81109B CXLE81109C CXLE81109L可控制8个LED电流通道电流模式升压转换器集成了48V/2.5A电源开关驱动LED阵列

CXLE81109B CXLE81109C CXLE81109L是一个集成的功率LED背光驱动程序，可控制8个LED电流通道，用于笔记本电脑和LCD显示器等LCD背光应用。CXLE81109B/C/L是一个电流模式升压转换器，集成了48V/2.5A电源开关驱动LED阵列。CXLE81109B/C/L的8个电压控制电流通道在1.5%范围内进行电流匹配，补偿了LED堆栈中正向电压变化的不均匀性。为了在典型的多串操作中最小化电压余量和功率损耗，CXLE81109B/C/L监控最高LED正向电压串，并使用其反馈信号进行输出调节。设置引脚用于编程最大LED电流。通过驱动带有PWM信号的PWM管脚，可以实现高对比度的真PWM调光。LED电流与脉宽调制引脚占空比成正比。cxl81109b/C/L具有广泛的保护功能，包括OLP、OCP、OVP和OTP。有TQFN4X4-24和TSSOP-20（FD）包装
·8个通道
·4.2V至24V输入电源
最大输出电压席
·通道全电流可编程，最高可达30毫安
·当前匹配1.5%
·最高Vf串检测调节
·高精度数字调光，采用脉宽调制引脚
·自动连接/断开LED
·1MHz开关频率
·EN、PWM和车辆识别号无电源顺序
保护：打开LED保护（OLP）
过电流保护（OCP）
过电压锁定（OVP）
过热保护（OTP）

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 CXLE81109B CXLE81109C CXLE81109L is an integrated power LED backlight driver that controls 8 channels of LED current for LCD backlight applications such as notebook computer and LCD monitor. The CXLE81109B/C/L is a current mode boost converter integrated with 48V/2.5A power switch drivers the LED array. The CXLE81109B/C/L’s 8 channels of voltage controlled current sinks with current matching within 1.5%, which 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 CXLE81109B/C/L monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. A SET pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving PWM pin with a PWM signal. LED current is proportional to the PWM pin duty. The CXLE81109B/C/L features extensive protection functions that include OLP, OCP, OVP and OTP. It is available in a TQFN4X4-24 & TSSOP-20 (FD) package.

   产品特点 返回TOP

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„ 8 Channels 

„ 4.2V to 24V Input Supply 

„ 48V Maximum Output Voltage 

„ Channel Full current Programmable up to 30mA 

„ Current Matching 1.5% 

„ Highest Vf String Detection for Regulation 

„ High Accuracy Digital Dimming by PWM Pin 

„ Automatic Connect/Disconnect LED 

„ 1MHz Switching Frequency 

„ Power sequence free for EN,PWM and VIN 

„ Protections: Š Open LED Protection (OLP) 

Š Over Current Protection (OCP) 

Š Over Voltage Lockout (OVP) 

Š Over Temperature Protection (OTP) 

„ TQFN4X4-24 & TSSOP-20 (FD) Package 

„ RoHS Compliant

   应用范围 返回TOP

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„ Notebook Display LED Backlighting 

„ LCD Monitor LED Backlighting 

„ LCD TV LED Backlighting 

„ Automotive Display 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