With a 40-V rated integrated power switch MOSFET, the CXLE8144 is a boost converter that drives up to 10 White LEDs in series. The CXLE8144 operates at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.
The default Full-Scale White LED current is set by an external sensor resistor with regulated 200mV feedback voltage, as shown in typical application. During operation, the LED current can be controlled using the Pulse Width Modulation (PWM) signal applied on the EN pin, through which the PWM Duty-Cycle determines the feedback reference voltage and then the White LED current. In PWM mode, the WD3148 does not burst the LED current; therefore, it does not generate audible noises on the ceramic output capacitor. For maximum protection, the device features integrated open LED protection that disables the CXLE8144 to prevent the output voltage from exceeding the absolute maximum ratings during open LED conditions.
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[ CXLE8144 ]"
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
With a 40-V rated integrated power switch MOSFET, the CXLE8144 is a boost converter that drives up to 10 White LEDs in series. The CXLE8144 operates at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.
The default Full-Scale White LED current is set by an external sensor resistor with regulated 200mV feedback voltage, as shown in typical application. During operation, the LED current can be controlled using the Pulse Width Modulation (PWM) signal applied on the EN pin, through which the PWM Duty-Cycle determines the feedback reference voltage and then the White LED current. In PWM mode, the WD3148 does not burst the LED current; therefore, it does not generate audible noises on the ceramic output capacitor. For maximum protection, the device features integrated open LED protection that disables the CXLE8144 to prevent the output voltage from exceeding the absolute maximum ratings during open LED conditions.
The CXLE8144 is available in a PCB space saving DFN 2mm x 2mm-6L Package with bottom thermal pad. Standard product is Pb-free and Halogen-free.
二.产品特点
2.7V~5.5V Input voltage range
38V Open LED Protection
200mV Reference Voltage
600kHz Switching frequency
Up to 91% Efficiency
PWM Brightness Control
PWM Dimming Duty ranges from 0.3% to 100%
Built-in Soft-Start and Over-Current limit
三.应用范围
Smart Phones
Tablets
Portable games
四.技术规格书（产品PDF)
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五.产品封装图
六.电路原理图
七.相关芯片选择指南 更多同类产品......
| LV Product>LED Backlight | ||||||||
| Product | Character | Typical Effciency | Operating Voltage | Quiescent Iq | Output Voltage | Iq in Shutdown | SW Current Limit | Package |
| CXLE8135 | 1MHz Asynchronous PWM | 88% | 2.5~5.5V | 400μA | UP to 20V | 1μA | 1A | SOT23-5L |
| CXLE8136 | 1MHz OVP Asynchronous PWM | 88% | 2.5~6V | 550μA | Up to 25V | 1μA | 1A | SOT23-6L |
| CXLE8137 | 1MHz OVP Asynchronous PWM | 92% | 2.5～5.5V | 400μA | Up to 36V | 1μA | 1.2A | SOT23-6L |
| CXLE8138 | 1MHz OVP Asynchronous PWM | 92% | 2.5～5.5V | 400μA | Up to 36V | 1μA | 1.2A | SOT23-6L DFN22-8L |
| CXLE8139 | 1MHz OVP Asynchronous PWM | 92% | 2.5~5.5V | 400μA | Up to 36V | 1μA | 2A | TSOT23-6L DFN22-8 |
| 背光驱动 | ||||||||||
| Product | VIN | VIN | VOVP | VFB | IQ | ILIM | R(ON) | Freq. | Efficiency | Package |
| Min | Max | Typ | Typ | Typ | Min | Typ | Typ | Max | ||
| (V) | (V) | (V) | (mV) | (uA) | (A) | (Ω) | (MHz) | (%) | ||
| CXLE8140 | 3 | 5.5 | 38 | 0.2 | 300 | 1.5 | 0.3 | 0.6 | 91 | SOT-23-6L |
| CXLE8141 | 3 | 5.5 | 26 | 0.2 | 300 | 1.5 | 0.3 | 1 | 91 | SOT-23-6L |
| CXLE8142 | 2.7 | 5.5 | 38 | 0.2 | 400 | 0.8 | 0.6 | 0.6 | 91 | DFN2020-6L |
| CXLE8143 | 2.7 | 5.5 | 38 | 0.2 | 200 | 1.2 | 0.45 | 1 | 92 | TSOT-23-6L |
| CXLE8144 | 2.7 | 5.5 | 38 | 0.2 | 400 | 0.85 | 0.4 | 1.5 | 91 | DFN2*2-6L |
