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PT4115B Datasheet Preview

PT4115B Datasheet

Continuous inductor current conduction mode drop Constant current source

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深圳市福田区天安数码城创新科技广场一期 A 1501
深圳市励致电子技术有限公司
TEL:0755-8250 7171
FAX:0755-8835 3509
产品规格说明书
PT4115B
版本号 1.0
Page 1 of 13




LIZE

PT4115B Datasheet Preview

PT4115B Datasheet

Continuous inductor current conduction mode drop Constant current source

No Preview Available !

深圳市福田区天安数码城创新科技广场一期 A 1501
深圳市励致电子技术有限公司
TEL:0755-8250 7171
FAX:0755-8835 3509
目录
产品概述..............................................................................................................................................3
主要技术参数......................................................................................................................................3
典型应用电路图..................................................................................................................................3
效率曲线..............................................................................................................................................4
功能模块框图......................................................................................................................................4
封装示意图..........................................................................................................................................5
引脚说明..............................................................................................................................................5
电气参数..............................................................................................................................................6
典型性能波形......................................................................................................................................7
功能描述............................................................................................................................................ 11
工作原理描述............................................................................................................................. 11
通过外部电流采样电阻 RS 设定 LED 平均电流....................................................................11
通过直流电压实现模拟调光..................................................................................................... 11
通过 PWM 信号实现调光......................................................................................................... 11
关断模式.....................................................................................................................................12
软启动模式.................................................................................................................................12
欠压保护.....................................................................................................................................12
LED 开路保护............................................................................................................................12
过热保护.....................................................................................................................................12
元器件选择........................................................................................................................................12
电感.............................................................................................................................................12
肖特基二极管 D.........................................................................................................................12
应用注意事项....................................................................................................................................12
降低输出纹波.............................................................................................................................12
低输入电压下工作.....................................................................................................................13
负载电流的热补偿.....................................................................................................................13
典型应用电路....................................................................................................................................13
Page 2 of 13


Part Number PT4115B
Description Continuous inductor current conduction mode drop Constant current source
Maker LIZE
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PT4115B Datasheet PDF






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