Dimming Power LEDs Using a SEPIC Converter and MCP1631 PIC Attach PWM Controller
Valentin C. Constantin
This application note covers the general concept, design and some source code modifications for using the MCP1631HV Digitally Controlled Programmable Current Source Reference Design for an LED lighting application. The document offers additional insight into the MCP1631HV Digitally Controlled Programmable Current Source Reference Design. A Microchip MCP1631 PWM controller and a low-cost PIC16F616 microcontroller are used to manage a SEPIC (Single Ended Primary Inductive Converter) powertrain. The SEPIC topology is then used to drive and dim Light Emitting Diodes (LEDs).
PWM Controller, SEPIC DC-DC Converter, LED Lighting, Power LED Dimming, Current Regulation, Programmable Current Source, LED Thermal Management