MicrochipdsPIC33数字电源IPFC参考设计  2012/3/1

         Microchip公司的dsPIC33F数字信号控制器(DSC)具有高性能的CPU和丰富的接口,不需要外接芯片就能组成完整的解决方案,采用dsPIC33F内核,3.3V时有40MIPS的性能, 它的DSP引擎支持快速的控制回路,外设如高速PWM,ADC和模拟比较器特别适用于电源转换.本文介绍了dsPIC33F数字信号控制器(DSC)主要性能,方框图以及采用dsPIC33F的交错功率因子修正(IPFC), 两相IPFC方框图, 平均电流模式框图, IPFC MATLAB® 模式框图, IPFC数字控制系统模型框图和IPFC框图, IPFC系统框图和IPFC参考设计详细电路图.

Implementing advancedsoftware digital control loops forpowerapplications requires a high-performance DSP engine along with specialized peripherals. The high-performance CPU and rich peripherals of the dsPIC DSC devices enable solutions that do not require much in the way of external support chips. In addition to the space and cost-saving benefits found in the dsPIC DSC solutions, special features enable advanced power conversion. The DSP enginecanperform single-cycle MAC with data saturation, zero overhead looping and barrel shifting required to support fast control loop execution.

These devices include peripherals specifically designed for power conversion. Peripherals such as a highspeed PWM, ADC and analog comparators can be tied together using an internal configurable control fabric that enables them to interact directly with one another, resulting in stunning performance gains in digital power applications.

Key Features: dsPIC®33F SMPS and Digital Power Conversion Family

dsPIC33F Core

40 MIPS, 3.3V

Industrial and Extended Temp (125C)

Product Details:

6KB/16KB Flash, 256/1K/2K Bytes RAM

4 to 8 Channel Power Supply ( PS ) PWM

0, 2 or 4 Comparators, 10-bit DAC Reference, 1 DACout

18, 28 and 44-pin

Pin-compatible, functionally compatible with dsPIC® 30F SMPS & Digital Pow

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