dsPIC33設計的GS系列DSC數(shù)字LED照明技術

本文介紹了采用dsPIC33 GS系列DSC的數(shù)字LED照明開發(fā)套件主要特性，數(shù)字LED照明開發(fā)套件和降壓子板方框圖，數(shù)字LED照明開發(fā)套件和升壓子板方框圖，基板接口電路圖，基板電源電路圖，基板DMX和模擬電路圖，LED照明基板所用元器件表，以及降壓子板電路圖，升壓子板電路圖和數(shù)字LED照明開發(fā)套件材料清單。

dsPIC33F系列是高性能16 位數(shù)字信號控制器（DSC），采用改進型哈佛架構和C 編譯器優(yōu)化指令集，具有16 位寬數(shù)據(jù)總線和24 位寬指令，3.0-3.6V 時的工作速度達40MIPS，適用于多回路開關電源（SMPS）和其它數(shù)字電源轉(zhuǎn)換器如AC/DC轉(zhuǎn)換器，DC/DC轉(zhuǎn)換器，功率因素修正（PFC），不間斷電源（UPS），逆變器，嵌入電源控制器和數(shù)字照明等。

LED lighting applications supported by Microchip’s LED Lighting development Kit include dimmable LCD backlighting, signage, LED replacement of fluorescent tubes and incandescent bulbs, architectural lighting, and automotive lighting applications. Automotive lighting products include exterior applications, such as headlights, daytime running lights and signal lights.

Key features of Microchip’s Digital LED Lighting Development Kit include:

Color control for RGB LEDs

Supports DMX512 Standard for brightness control

Flexible input voltage support, including both Buck and Boost topologies

Fully dimmable

Full digital control

Fault protection

Fully controlled with a single dsPIC33FJ16GS504 DSC.

圖1。數(shù)字LED照明開發(fā)套件外形圖

The LED Lighting Development Kit can be used to demonstrate the capabilities of Microchips “GS” series of dsPIC Digital Signal Controllers (DSCs) in controlling multiple High Brightness (HB) LEDs. The development kit uses separate daughter cards for both buck and boost applications.

數(shù)字LED照明開發(fā)套件包括：

The LED Lighting Development Kit contains the following items:

• LED Lighting Development Kit Base Board

• Buck Daughter Card

• Boost Daughter Card

• Light Diffuser

• Information Sheet

圖2。LED照明基板外形圖
LED照明基板所用元器件表：

圖4。數(shù)字LED照明開發(fā)套件和升壓子板方框圖

圖5。基板接口電路圖

圖6。基板電源電路圖

圖7。基板DMX和模擬電路圖

圖8。降壓子板電路圖

圖9。升壓子板電路圖
數(shù)字LED照明開發(fā)套件材料清單（BOM）：