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
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[ CXLE81101 ]
目录
7.相关产品
产品概述 返回TOP
The CXLE81101 is a high-efficiency 6-channel white LED driver. It is designed for LCD panel that employs an LED array as the lighting source. An integrated switch current mode boost controller drives six strings in parallel and supports up to 10 pieces of LEDs per string. The CXLE81101 automatically regulated supply voltage for the LED light bars without the need to calculate the output for different LED types. It also integrates a 40V n-channel MOSFET that provides high output power. The 6-channel current driver is ideal for constant current driving, and well matched less than 3%. To set the maximum driving current, the ISET pin is used to determine reference current. Each channel of the current drivers is set to 800 times of this reference current. A PWM pin can be used to perform PWM dimming from the range of 100Hz to 25kHz. The MODE pin in CXLE81101 is used to set the dimming mode. If MODE pin set to floating, the dimming mode is in the PWM mode, the current driver ON/OFF is synchronized with the PWM signal. If Mode pin set to AGND, PWM and ILED current is set at PWM duty multiplied by ISET current when PWM duty ≥ 25%. If the PWM duty<25%, the ILED current is fixed at 0.25xISET, and the dimming duty is 4 x PWM duty. If MODE set to VDC, the dimming mode operated in the Pure DC mode, the current-source outputs are DC dimming and the PWM duty cycle modulates the amplitude of the currents. Open LED-string automatically disable the channel from entering over voltage protection.
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
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 |
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|
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 |
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|
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 |
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|
5 |
24 |
6 |
40 |
2 |
1000 |
1.23 |
30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP,SLP |
TQFN3X3-16 |
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|
CXLE81107L |
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 |
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|
4.2 |
24 |
8 |
48 |
3 |
1000 |
0.6 |
30mA/CH,PWM dimming,EN,SS,OCP, OVP,OTP,OLP |
TQFN4X4-24 TSSOP20(FD) |
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|
7 |
18 |
1 |
EXT |
VCS SET |
ADJ |
1.2 |
Programmable ILED, PWM Dimming, Hiccup mode for OVP,SCP |
SOP-16 |
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10 |
30 |
4 |
EXT |
VCS SET |
ADJ |
0.8 |
20mA~150mA/CH, PWM dimming,EN, SS,OCP,OVP,OTP, OLP,SLP |
TSSOP20(FD) |
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|
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 |
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|
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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◀ 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
下一篇▶:CXLE81102升压转换器驱动恒流白色LED使能输入反复脉冲调整LED的亮度逐周期电流限制检测电感电流热保护过电压保护内置循环电流限制软启动功能
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