目录

1.产品概述       2.产品特点     rl9嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）rl9嘉泰姆

5.产品封装       6.电路原理图  rl9嘉泰姆

7.相关产品rl9嘉泰姆

   产品概述 返回TOPrl9嘉泰姆

The CXLE8157 is a high efficiency charge pump white LED driver; the device drives up to four white LEDs in the main display and up to two white LEDs in the sub-display with regulated constant current for uniform intensity. The supply voltage ranges from 2.7V to 5.5V and it is optimized for a Li-ion battery application. The CXLE8157 operates in 1x, 1.5x, and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to maintain the required power for high power efficiency. The CXLE8157 provides up to 30mA per LED and allows several methods such as the PWM signals on the ENM pin for main-display dimming and on the ENS pin for sub-display dimming. The two control logic pins, ENM and ENS, allow disabling or enabling the main and sub-displays. The supply current is only 2mA in 2x mode, and the ENM and ENS are kept low for 20ms will allow the device to enter shutdown mode with 2mA quiescent current. The CXLE8157 features current limit and short circuit protection. The CXLE8157 switches at 1MHz frequency and only requires four 1mF ceramic capacitors and one resistor, and ensures low input current ripple and EMI. The CXLE8157 is available in a 16-pin QFN package.

   产品特点 返回TOPrl9嘉泰姆

· ±1.5% LED Current Matching rl9嘉泰姆

· Powers Main and Sub-Display LEDs rl9嘉泰姆

· High Efficiency Up to 90% Over Li-ion Battery Discharge rl9嘉泰姆

· Output Current Up to 30mA per LED rl9嘉泰姆

· 2.7V to 5.5V Operating Voltage rl9嘉泰姆

· 1x/1.5x/2x Charge Pump Modes rl9嘉泰姆

· Low Shutdown Current: 2mA Maximum rl9嘉泰姆

· Low Input Ripple and EMI rl9嘉泰姆

· Internal Soft-Start Limits Inrush Current rl9嘉泰姆

· Short Circuit Current Limit rl9嘉泰姆

· Thermal Shutdown Protection rl9嘉泰姆

· Output Over-Voltage Protection rl9嘉泰姆

· 16-pin QFN Package rl9嘉泰姆

· Lead Free and Green Devices Available (RoHS Compliant)rl9嘉泰姆

   应用范围 返回TOPrl9嘉泰姆

· Cellular Phone White LED Back Light rl9嘉泰姆

· Portable Device rl9嘉泰姆

· PDA, Handheld Computer rl9嘉泰姆

· DSCrl9嘉泰姆

   技术规格书（产品PDF) 返回TOP rl9嘉泰姆

     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！rl9嘉泰姆

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产品封装图 返回TOPrl9嘉泰姆

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电路原理图 返回TOPrl9嘉泰姆

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