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）
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[ CXLE81109B/C/L ]
目录
7.相关产品
产品概述 返回TOP
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
„ 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
„ 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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产品封装图 返回TOP
电路原理图 返回TOP
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LED Backlight Driver |
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Part NO. |
Vin(V) min. |
Vin(V) max. |
CH |
VOUT (max) |
ISW (A) |
FSW (kHz) |
VLED FB(V) |
Note |
Package |
|
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 |
|
|
2.5 |
5.5 |
1 |
40 |
1.2 |
1000 |
0.2 |
LX,GND,FB,EN,OVP,VIN,EN Dimming 100~200kHz |
TSOT23-6 |
|
|
4.2 |
24 |
6 |
40 |
2 |
600 |
1.25 |
30mA/CH,Dimming 100~25kHz,EN,OCP, OVP,PWM/DC/Mixed DimmingMode |
TQFN4X4-20 |
|
|
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 |
|
|
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 |
|
|
2.5 |
5.5 |
1 |
40 |
1.2 |
1000 |
0.2 |
LX,GND,FB,EN,OVP,VIN,EN Dimming 100~200kHz |
SOT23-6 |
|
|
2.7 |
5.5 |
1 |
28 |
0.85 |
1000 |
0.2 |
LX,GND,FB,EN,OVP,IN |
TDFN2X2-8/SOT-23-6 |
|
|
2.7 |
7 |
1 |
26 |
0.7 |
600 |
0.2*EN Duty |
FB,COMP,GND,LX, EN,VIN,5k~100kHz EN BrightnessControl |
TDFN2X2-6 |
|
|
2.7 |
7 |
1 |
38 |
0.7 |
600 |
0.2*EN Duty |
FB,COMP,GND,LX, EN,VIN,5k~100kHz EN BrightnessControl |
TDFN2X2-6 |
|
|
5 |
24 |
6 |
40 |
2 |
1000 |
1.23 |
30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP,SLP |
TQFN3X3-16 |
|
|
3.2 |
24 |
6 |
40 |
2 |
1000 |
1.23 |
30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP,SLP |
TQFN3X3-16 |
|
|
5 |
24 |
6 |
50 |
2 |
750 |
1.23 |
30mA/CH, PWM dimming, EN,SS, OCP,OVP,OTP,OLP |
TQFN4X4-20 |
|
|
4.2 |
24 |
8 |
48 |
3 |
1000 |
0.6 |
30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP |
TQFN4X4-24 TSSOP20(FD) |
|
|
7 |
18 |
1 |
EXT |
VCS SET |
ADJ |
1.2 |
Programmable ILED, PWM Dimming, Hiccup mode for OVP,SCP |
SOP-16 |
|
|
10 |
30 |
4 |
EXT |
VCS SET |
ADJ |
0.8 |
20mA~150mA/CH, PWM dimming,EN, SS,OCP,OVP,OTP, OLP,SLP |
TSSOP20(FD) |
|
|
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 |
|
|
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 |
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