IRMCF341

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1 Overview

IRMCF341 is a new International Rectifier integrated circuit device primarily designed as a one-

chip solution for complete inverter controlled appliance motor control applications. Unlike a

traditional microcontroller or DSP, the IRMCF341 provides a built-in closed loop sensorless

motion control sequencer and dual port RAM to map internal signal nodes. IRMCF341 also

employs a unique single shunt current reconstruction circuit to eliminate additional analog/digital

circuitry and enables a direct shunt resistor interface to the IC. Motion control programming is

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 IRMCF341.

IRMCF341 contains 48K bytes of program RAM, which can be loaded from external EEPROM

for 8051 program execution. The IRMCF341 is intended for development purposes. For high

volume production, the program RAM is replaced with 64K bytes of OTP ROM. Both the

development and ROM versions come in a 64-pin QFP package with identical pin configuration to

facilitate PC board layout and transition to mass production.

IRMCF341

Multiple

Output

Power

Supply

HVIC

Gate Drive

&

Protection

Circuit

Up to 24 Digital

Input/Output

to EEPROM

7 Analog Input

Appliance Inverter

3.3

V

1.8

V

Passive

EMI

Filter

UART interface

to Front Panel

PMSM

Figure 1. Typical Application Block Diagram Using IRMCF341