IRMCF341

4

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

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 achieved using a

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 is intended for development purpose and contains 48K bytes of RAM, which can be

loaded from external EEPROM for 8051 program execution. 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

IRMCF341

Multiple

Output

Power

Supply

HVIC

Gate Drive

&

Protection

Circuit

Upto 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

Motor

(PMSM)

Figure 1.

Typical Application Block Diagram Using IRMCF341