The CXLE8170/A is a constant current step-up converter specifically designed to drive white LEDs. With a 45V rated integrated switch FET, the step-up converter supports up to 10 white LEDs in series connection, so the LED currents are identical for uniform brightness. The boost converter runs at 1.0MHz fixed switching frequency with 1.3A switch current limit, and allows for the use of a high brightness LED in general lighting. The maximum white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200mV(CXLE8170A 300mV), as shown in the typical application. During the operation, the LED current can be controlled through the EN pin in two modes. With a 8KHz or higher frequency PWM dimming signal on EN pin, CXLE8170/A operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. CXLE8170/A can operate in digital dimming mode also, which a Single Wire interface on the EN pin is integrated to adjust the FB voltage in 32 steps. In either digital or PWM mode, the CXLE8170/A does not generate audible noises on the output capacitor. For the protection, the CXLE8170/A provides
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[ CXLE8170 ]"
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产品概述 返回TOP
CXLE8170/A是一款专为白光LED设计的升压型恒流驱动器. 通过内置45V功率管，使得CXLE8170/A能驱动单串10LEDs串连负载，从而保证所有LED电流相同。CXLE8170/A内置升压转换器工作在1MHz震荡频率和1.3A电流极限，也能用于通用型的高亮度LED照明。CXLE8170/A回馈电压为200/300mV，通过回馈电阻可以设置LED最大输出电流。CXLE8170/A内置两种调光方式：一是PWM调光，通过外加在EN端的PWM调光信号，可以得到与PWM占空比成比例的LED电流输出，其PWM调光频率范围：8KHz~300KHz，并在调光时不会在输出电容上产生音频噪声。二是单线调光，通过在EN端加入符合协议的脉冲信号，可获得32阶LED电流信号，达到调光目标。其内置38.5V过压保护功能为LED提供开路保护。CXLE8170采用TSOT23-6封装。The CXLE8170/A is a constant current step-up converter specifically designed to drive white LEDs. With a 45V rated integrated switch FET, the step-up converter supports up to 10 white LEDs in series connection, so the LED currents are identical for uniform brightness. The boost converter runs at 1.0MHz fixed switching frequency with 1.3A switch current limit, and allows for the use of a high brightness LED in general lighting. The maximum white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200mV(CXLE8170A 300mV), as shown in the typical application. During the operation, the LED current can be controlled through the EN pin in two modes. With a 8KHz or higher frequency PWM dimming signal on EN pin, CXLE8170/A operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. CXLE8170/A can operate in digital dimming mode also, which a Single Wire interface on the EN pin is integrated to adjust the FB voltage in 32 steps. In either digital or PWM mode, the CXLE8170/A does not generate audible noises on the output capacitor. For the protection, the CXLE8170/A provides 38.5V OVP to prevent damage from LED open. The CXLE8170/A is available in low profile TSOT23-6 package.
产品特点 返回TOP
‧2.6V～5.5V输入电压
‧38.5V过压保护
‧内置软启动
‧补偿内置
‧单线协议提供32阶LED电流调节
‧PWM调光频率范围：8KHz~200KHz
‧工作频率高达1MHz
‧过压保护
‧过温保护
‧输入欠压锁定
‧TSOT23-6封装
‧符合RoHS规范及Pb-Free
2.6V to 5.5V Input Range
38.5V Output Over Voltage Protection
Internal Soft-Start
Internal Compensation
Single-Wire Serial Pulse Interface to Set LED
Current with 32-Step Scale
External PWM Dimming with 8KHz - 300KHz
Frequency Range
Internal 45V N-FET
1MHz Fixed Switching Frequency
Over Voltage Protection
Over Thermal Protection
VIN Under Voltage LockOut
Available in TSOT23-6 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
应用范围 返回TOP
‧移动电话
‧GPS 导航系统
‧便携媒体播放器
‧手持设备、数码相机
‧便携游戏机
Mobile Phones
GPS Navigation Systems
Portable Media Players
Handheld Devices, Digital Camera
Portable Game Machines
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
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电路原理图 返回TOP
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白光LED驅動器 > LED背光 |
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Part Number |
remark |
Vin (V) |
Vout (max)(V) |
FB(V) |
IQ(mA) |
Isw(A) |
Max LED |
Peak Efficency (%) |
Package |
|
Small Package, High Performance, Asynchronies Boost for WLED Driver |
2.6~5.5 |
18 |
0.2 |
0.4 |
2 |
15P3S |
93 |
TSOT23-5 |
|
|
White LED Driver For Buck-Boost Application |
6~25 |
32 |
Vctrl/10 |
1.3 |
1.4 |
3 x 9 = 27 |
90 |
TDFN-8 |
|
|
White LED Boost Converter with PWM Dimming and Single-Wire Interface |
2.7~5.5 |
38 |
0.2 |
0.35 |
1.3 |
12 |
91 |
TDFN-6 |
|
|
10 White LED Boost Converter with PWM Dimming and Single-Wire Series Interface |
2.5 ~ 5.5 |
38.5 |
0.2/0.3 |
0.3 |
1.3 |
12 |
88 |
TSOT23-6,SOT23-6 |
|
|
10 White LED Boost Converter with PWM Dimming |
2.5~5.5 |
38.5 |
0.2 |
0.3 |
1.3 |
12 |
88 |
TSOT23-6 |
|
|
6 String White LED Driver with Boost Converter |
2.5~24 |
43 |
0.5 |
2 |
2.5 |
6 × 10= 60 |
90 |
TQFN-20 |
|
|
4 Strings High Current White LED Driver with Boost Controller |
4.5~28 |
65 |
0.6 |
0.75 |
- |
4 x 18 =72 |
93 |
SOP-16 |
|
|
12 String White LED Driver With Boost Controller |
4.5~28 |
65 |
0.6 |
1.5 |
- |
216 |
93 |
TSSOP-28(EP) |
|
