IRMCF171

5

www.irf.com

© 2013 International Rectifier

April 20, 2013

1 Overview

IRMCF171 is a new generation International Rectifier integrated circuit device primarily designed as a one-chip

solution for complete inverterized appliance motor control applications. Unlike a traditional microcontroller or

DSP, the IRMCF171 provides a built-in closed loop sensorless control algorithm using the unique flexible Motion

Control Engine (MCETM) for permanent magnet motors as well as induction motors. The MCE

collection of control elements, motion peripherals, a dedicated motion control sequencer and dual port RAM to

map internal signal nodes. IRMCF171 also employs a unique single shunt current reconstruction circuit in

addition to two leg shunt current sensing circuit to eliminate additional analog/digital circuitry and enables a direct

shunt resistor interface to the IC. Motion control programming is achieved using a dedicated graphical compiler

integrated into the MATLAB/SimulinkTM development environment. Sequencing, user interface, host

communication, and upper layer control tasks can be implemented in the 8051 high-speed 8-bit microcontroller.

The 8051 microcontroller is equipped with a JTAG port to facilitate emulation and debugging tools. Figure 1

shows a typical application schematic using the IRMCF171.

IRMCF171 contains 64 Kbytes of Flash program memory. The IRMCK171 contains 32 Kbytes OTP memory and

is intended for high volume production purposes while the IRMCF171 is intended for flexible volume production.

Both the Flash and ROM versions come in a 48-pin QFP package with identical pin configuration to facilitate PC

board layout and transition to mass production.

IRMCF171

Power

Supply

IRS2336D

PM motor

IPM or SPM

Or

IM motor

Passive

EMI

Fillter

Digital I/O

Analog Input

Host

Communication

(RS232C)

Appliance PM

motor Drive

3.3V

Gate signal

15V

EEPROM

6

2

8

Galvanic

isolation

Optional

Figure 1. Typical Application Block Diagram Using IRMCF171