Design and Implementation of an LED driver with Touch-Type Stepless Dimming control

[[abstract]]在本文所提出一觸控式無段調光之LED驅動器，系統架構中以Boost昇壓轉換器架構來呈現，並利用電容式觸控之回授訊號，進行Boost昇壓型轉換器之責任週期控制，藉由微控制處理器調整責任週期之過程，達成LED無段調光之功能。本文中利用PCB底層之銅箔感應區域，即可完成電容感應觸摸。利用微控制處理器接收觸控訊號來調整相對應的PWM信號，而觸控方式採用無段控制法，微控制處理器接收到訊號來調整PWM讓LED燈管的亮度來達到漸亮及漸暗的功能，範圍從LED燈管亮度0%到100%，可應用在室內照明、檯燈及有調光需求之產品中。[[abstract]]This paper proposed a touch of stepless dimming LED drivers system architecture to boost converter architecture to render and use capacitive touch only the feedback signal for boost converter duty cycle controlled by micro-processor control to adjust the duty cycle of the process to achieve stepless dimming LED function This LED driver use of the underlying PCB copper foil to complete the capacitive sensing touch The MCU receive of the touch signals to adjust the PWM signal and control boost converter MCU PWM signal to adjust the brightness of the LED lamps to achieve stepless function ranging from LED lamp brightness from 0% to 100% this LED lamp can be used in indoor lighting table lamps and a dimming demand product