Maxim公司的dsPIC33FJ系列16位数字信号控制器(DSC),CPU工作高达40MIPS,支持多回路数字开关电源和其它数字功率转换应用如AC/DC转换器,PFC,UPS,逆变器,嵌入电源控制器,断路器等.本文介绍了dsPIC33FJ系列主要特性以及采用dsPIC33FJ系列的LED HBLED照明开发套件主要特性,方框图,电路图,材料清单和PCB布局图.

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



图1.LED照明基板外形图
LED照明基板主要元件:



图2. LED照明开发套件降压子板外形图

图3. LED照明开发套件升压子板外形图


图4. LED照明开发套件和降压子板方框图

图5. LED照明开发套件和升压子板方框图

图6. 基板接口电路图

图7. 基板电源电路图

图8. 基板DMX和模拟开关电路图

图9. 降压子板电路图

图10. 升压板接口电路图

图11. LED照明基板PCB布局图
LED照明开发套件材料费清单:



详情请见:
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#