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On Semi NCP5680高效白光LED驱动方案

文章出处:8gled.com作者:格烁光电发表时间:2018-07-24
泉州代孕-爱子频道uaus【专业包成功】

On Semi公司的NCP5680是大功率电荷泵驱动器,专用用来向大型Super Cap电容进行充电,内置的DC/DC转换器基于1X,1.5X和2X的高效电荷泵架构,支持双功率闪光和火炬. NCP5680的工2.7V到5.5V,可编程SuperCAP充电电流,集成了光检测功能,内置短路保护功能,主要用于手提闪光灯和照相手机闪光灯.本文介绍了NCP5680主要特性,方框图, 双白光LED驱动电路, 基本功率闪光应用电路和全功能应用电路.

The NCP5680 product is a High Power charge pump driver dedicated to the recycling of a large Super Cap capacitor. The built?in DC/DC converter is based on a high efficient charge pump structure with 1X, 1.5X and 2X operating modes. It supports double power flash led and torch operation. The controller is designed to properly drives large external NMOS device with accurate control of the peak current flowing into the LED. Also, the chip includes Open Load and Overload Detection circuit to protect the system against faults at Vout or LED levEL.

NCP5680主要特性:

2.7 to 5.5 V Input Voltage Range

Dual Power Flash LED Capability

Integrated Overload Protection

Selectable Flash/Torch Mode of Operation

Programmable SuperCAP Re?cycling Current

Capable to Share the DC Vo武汉代孕-【服务今天.建设明天aTsj】喂养频道ltage to Supply Peripheral Circuits

Indicator LED Function

Integrated Photo Sense Function

Support Camera Strobe

Built?in Short Circuit Protection

Selectable Flash Time Out Safety Timing

Support External NMOS up to 10 A Load Capability

Embedded SuperCAP Vbias

Fully I2C Protocol Compliant

Support GSM Synchronization

Built?in LED Test Function

This is a Halide?Free Device

This is a Pb?Free Device

NCP5680典型应用:

Portable Photo Flash

Digital Cellular Phone Camera Photo Flash



图1.NCP5680简化方框图



图2.简化的NCP5680概念图



图3.NCP5680典型双白光LED驱动电路



图4.NCP5680基本输出功率闪光电流调节架构:带视频/火炬回路和过载检测



图5.NCP5680基本功率闪光应用电路



图6.NCP5680全功能应用电路



图7.NCP5680四倍电源功率LED驱动电路

详情请见:
http://www.onsemi.com/pub_link/Collateral/NCP5680-D.PDF


泉州代孕-爱子频道uaus【专业包成功】 On Semi NCP5680高效白光LED驱动方案原创编辑请注明出来http://m.dg-yuansheng.com.cn

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