Maxim公司的dsPIC33FJ系列16位數字信號控制器(DSC),CPU工作高達40MIPS,支持多回路數字開關電源和其它數字功率轉換應用如AC/DC轉換器,PFC,UPS,逆變器,嵌入電源控制器,斷路器等.本文介紹了dsPIC33FJ系列主要特性以及采用dsPIC33FJ系列的LED HBLED照明開發套件主要特性,方框圖,電路圖,材料清單和PCB布局圖.
dsPIC33FJXXGSXXX SMPS & Digital Power Conversion 16-bit Digital Signal Controller. These devices offer features supporting common, multi-loop digital switch-mode power supplies (SMPS) and other digital power-conversion applications such as: • AC to DC Converters • DC to DC Converters • Power Factor Correction (PFC) • Uninterruptible power supply (UPS) • Inverters • Embedded Power-Supply Controllers • Circuit Breakers, Arc Fault Detection
dsPIC33FJ系列主要特性:
CPU
? Up to 40 MIPS Operation (at 3.0-3.6V)
? 16 x 16 Fractional/Integer Hardware Multiply, Single Cycle Execution
? Single-Cycle Multiply and Accumulate
? 32-bit by 16-bit Hardware Divider
? C Compiler Optimized Instruction Set System
? Internal oscillator and Phase-Locked Loop (PLL) with 120 MHz VCO
? On-chip LDO Voltage Regulator
? JTAG Boundary Scan and Flash Memory Program Support
? Fail-Safe Clock Monitor – allows safe shutdown if clock fails
? Watchdog Timer with separate RC oscillator Power Managed Modes
? Run, Idle and Sleep modes
Multiple, Switchable Clock Modes for Optimum Performance and Power Management High-Speed PWM Module Features
? Up to Four PWM Generators with Four to Eight Outputs
? Dead Time for Rising and Falling Edges
? Duty Cycle Resolution of 1.04 ns for Dead-Time, Phase Shift, and Frequency
? Supported PWM modes: Standard Edge-Aligned, True Independent Output, Complementary, Center-Aligned, Push-Pull, Multi-Phase, Variable Phase, Fixed Off-Time, Current Reset, and Current-Limit
? PWMxL, PWMxH Output Pin Swapping
? PWM4H, PWM4L Pins Remappable
? On-the-Fly PWM Frequency, Duty Cycle and Phase Shift Changes High-Speed Analog Comparator
? Up to Four Analog Comparators
? 20 ns response time
? 10-bit DAC for each analog comparator
? DACOUT pin to provide DAC output High-Speed 10-Bit ADC
? 10-Bit Resolution
? Up to 12 Input Channels Grouped into Six Conversion Pairs
? 4 Msps or 2 Msps Conversion rate
? Independent Trigger Source Section for each Analog Input Conversion Pair Peripherals
? UART Module with LIN and IrDA® support
? SPI Module with FIFO
? I2C™ Modules with Master and Slave Modes
? Up to 3 16-bit Timer Modules
? Up to 2 Input Capture and 2 Output Compare / PWM
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.
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1.LED照明基板外形圖
LED照明基板主要元件:
圖2. LED照明開發套件降壓子板外形圖
圖3. LED照明開發套件升壓子板外形圖
圖4. LED照明開發套件和降壓子板方框圖
圖5. LED照明開發套件和升壓子板方框圖
圖6. 基板接口電路圖
圖7. 基板電源電路圖
圖8. 基板DMX和模擬開關電路圖
圖9. 降壓子板電路圖
圖10. 升壓板接口電路圖
圖11. LED照明基板PCB布局圖
LED照明開發套件材料費清單:
詳情請見:
http://ww1.microchip.com/downloads/en/DeviceDoc/80439K.pdf
和
http://www.microchip.com/Microchip.WWW.SecureSoftwareList/secsoftwaredownload.aspx?device=en549342&lang=en&ReturnURL=http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en549342#
