IRMCS3041

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1 Introduction

1.1 Overview

IRMCS3041 is a reference design platform for inverter-controlled appliance motor drive applications based on

module.

IRMCF341 is International Rectifier’s new integrated circuit device primarily designed as a one-chip solution for

sensorless permanent magnet motor control in appliance applications. Unlike a traditional microcontroller or DSP,

IRMCF341 provides a built-in closed loop sensorless control algorithm using a unique Motion Control Engine

single shunt current reconstruction circuit to eliminate additional analog/digital circuitry and enables a direct shunt

motion control sequencer and dual port RAM to map internal signal nodes. Motion control programming is achieved

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, IRMCK341 contains

OTP ROM in place of program RAM to reduce the cost. Both IRMCF341 and IRMCK341 come in the same 64-pin

QFP package with identical pin configuration to facilitate PC board layout and transition to mass production

IRAMS10UP60B is an integrated power module developed and optimized for appliance motor control. An internal

shunt resistor is included and offers easy current feedback through IRMCF341 single shunt current reconstruction

circuit. Built-in over-current protection and short-circuit rated IGBTs along with under-voltage lockout function and a

built-in temperature monitor deliver a high level of protection and fail-safe operation. The integration of bootstrap

diodes for the high-side driver section and the single polarity power supply required to drive internal circuitry simplify

the utilization of the module and deliver further cost reduction advantages.

IRMCF341

Multiple

Output

Power

Supply

HVIC

Gate Drive

&

Protection

Circuit

Upto 22 Digital

Input/Output

to EEPROM

7 Analog Input

Appliance Inverter

3.3

V

1.8

V

Passive

EMI

Filter

UART interface

to Front Panel

Motor

(PMSM or IM)

Figure 1.

Typical Application Block Diagram Using IRMCF341