CXUS65172电荷泵驱动四个恒定电流白色LED超低漏电流调节器250kHz固定频率开关单电池锂电池输入电压高效率

目录

1.产品概述       2.产品特点     uJr嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）uJr嘉泰姆

5.产品封装       6.电路原理图  uJr嘉泰姆

7.相关产品uJr嘉泰姆

   产品概述 返回TOPuJr嘉泰姆

The CXUS65172 charge pump drives up to four white LEDs with regulated constant current for uniform intensity. By utilizing dynamic 1x/2x charge-pump modes and ultra-low-dropout current regulators, it achieves high efficiency over the 1-cell lithium battery input voltage range. The 250kHz fixed frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple. The CXUS65172 uses a single wire EN/Brightness control to enable, disable, and set the LED current with 16-linear steps down to 100μA. Once the desired LED brightness is set, the CXUS65172 maintains constant LED current as long as EN pin is kept high. If EN pin kept low for 90μs, the CXUS65172 enters shutdown. The short-circuit, over-voltage, and thermal protection are also included. The soft start is enabled to reduce the inrush current during power on and pump mode transformed.

   产品特点 返回TOPuJr嘉泰姆

Dynamic 1x/2x Charge Pump Switching uJr嘉泰姆

„ Up to 80mA (20mA/LED) Drive Capability uJr嘉泰姆

„ 90% Average Efficiency uJr嘉泰姆

„ 0.5% (TYP) LED Current Matching uJr嘉泰姆

„ Wide Current Range per LED [0.1mA ~ 20mA] uJr嘉泰姆

„ Single Wire EN/Brightness Control uJr嘉泰姆

„ 2.7V to 5.5V Supply Voltage Range uJr嘉泰姆

„ < 1μA Shutdown Current uJr嘉泰姆

„ Output Over-voltage Protection uJr嘉泰姆

„ Open/Short LED Protection uJr嘉泰姆

„ Thermal Shutdown Protection uJr嘉泰姆

„ TDFN2.5X2.5-10 and TQFN3X3-16 PackageuJr嘉泰姆

   应用范围 返回TOPuJr嘉泰姆

„ Mobile Phones uJr嘉泰姆

„ White LED Backlighting uJr嘉泰姆

„ Camera Flash LED LightinguJr嘉泰姆

   技术规格书（产品PDF) 返回TOP uJr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！uJr嘉泰姆

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产品封装图 返回TOPuJr嘉泰姆

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电路原理图 返回TOPuJr嘉泰姆

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