CXLE81101是一款高效的6通道白色LED驱动器。它是为采用LED阵列作为光源的LCD面板而设计的。一个集成的开关电流模式升压控制器驱动6串并联,每串最多支持10个LED。CXLE81101自动调节LED灯条的电源电压,无需计算不同LED类型的输出。它还集成了一个提供高输出功率的40V n沟道MOSFET。6通道电流驱动器是恒流驱动的理想选择,匹配度小于3%。为了设置最大驱动电流,ISET引脚用于确定参考电流。电流驱动器的每个通道被设置为该参考电流的800倍。可以使用一个PWM管脚在100Hz到25kHz的范围内进行PWM调光。CXLE81101中的模式管脚用于设置调光模式。如果模式引脚设置为浮动,则调光模式处于脉宽调制模式,则当前驱动器的开/关与脉宽调制信号同步。如果模式引脚设置为AGND,则当PWM占空比大于25%时,将PWM和ILED电流设置为PWM占空比乘以ISET电流。如果PWM占空比小于25%,则电流固定在0.25xISET,调光占空比为4xpwm占空比。如果模式设置为VDC,调光模式在纯直流模式下工作,则电流源输出为直流调光,而脉宽调制占空比调节电流的幅度。开路LED串自动禁止通道进入过电压保护。
·宽2.7V至5.5V输入电源范围
600KHz固定频率
·40V/2A,0.2Ωn沟道MOSFET
最大可编程LED通道电流30Ma席
·电流精度±3%,电流平衡度±2%
·100Hz~25kHz脉冲宽度调制调光
·脉宽调制到直流调光
“保护-输入欠压保护
过电流保护
过电压保护
热保护
[ CXLE81101 ]
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产品概述 返回TOP
产品特点 返回TOP
„ Wide 2.7V to 5.5V Input Supply Range
„ 600KHz Fixed Frequency
„ 40V/2A, 0.2Ω n-channel MOSFET
„ Maximum Programmable LED Channel Current 30mA
„ Current accuracy ±3% and current balance ±2%
„ 100Hz~25kHz PWM Dimming
„ PWM to DC Dimming
„ Protection Š Input Under-Voltage Protection
Š Over Current Protection
Š Over Voltage Protection
Š Thermal Protection
„ RoHs Compliant
„ TQFN4X4-20 Package
应用范围 返回TOP
„ UMPC and Notebook Computer Backlight
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产品封装图 返回TOP
电路原理图 返回TOP
LED Backlight Driver |
|||||||||
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 |
◀ 上一篇:CXLE81100宽4.2V至24V输入电压可编程LED通道电流30mA高效的6通道白色LED驱动器开关电流模式升压控制器驱动6串并联每串10个LED脉宽调制到直流调光
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