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
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[ CXLE81111 ]
目录
7.相关产品
产品概述 返回TOP
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
„ 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
„ LCD TV LED Backlighting
„ LCD Monitor LED 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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