Rev 1.1

Data Sheet No. PD60314

IRMCF371

Sensorless Motor Control IC for Appliances

Features

MCE

computation engine for high efficiency sinusoidal

sensorless control of permanent magnet AC motor

Supports both interior and surface permanent

magnet motors

Built-in hardware peripheral for single shunt

current feedback reconstruction

No external current or voltage sensing operational

amplifier required

Three/two-phase Space Vector PWM

Analog output (PWM)

Embedded 8-bit high speed microcontroller (8051)

for flexible I/O and man-machine control

JTAG programming port for emulation/debugger

Serial communication interface (UART)

I

Watchdog timer with independent analog clock

Three general purpose timers/counters

Two special timers: periodic timer, capture timer

External EEPROM and internal RAM facilitate

debugging and code development

Pin compatible with IRMCK371, OTP-ROM version

1.8V/3.3V CMOS

Product Summary

Maximum crystal frequency

60 MHz

Maximum internal clock (SYSCLK) frequency

128 MHz

Sensorless control computation time

11 μsec typ

MCE

16 bit signed

Program RAM loaded from external EEPROM 48K bytes

Data RAM

8K bytes

GateKill latency (digital filtered)

2 μsec

PWM carrier frequency counter

16 bits/ SYSCLK

A/D input channels

4

A/D converter resolution

12 bits

A/D converter conversion speed

2 μsec

8051 instruction execution speed

2 SYSCLK

Analog output (PWM) resolution

8 bits

UART baud rate (typ)

57.6K bps

Number of I/O (max)

13

Package (lead-free)

QFP48

Description

IRMCF371 is a high performance RAM based motion control IC designed primarily for appliance applications. IRMCF371 is

designed to achieve low cost and high performance control solutions for advanced inverterized appliance motor control.

IRMCF371 contains two computation engines. One is Motion Control Engine (MCE

magnet motors; the other is an 8-bit high-speed microcontroller (8051). Both computation engines are integrated into one

monolithic chip. The MCE

estimator, Multiply/Divide, Low loss SVPWM, Single Shunt IFB. The user can program a motion control algorithm by

connecting these control elements using a graphic compiler. Key components of the sensorless control algorithms, such as the

Angle Estimator, are provided as complete pre-defined control blocks implemented in hardware. A unique analog/digital circuit

and algorithm to fully support single shunt current reconstruction is also provided. The 8051 microcontroller performs 2-cycle

instruction execution (60MIPS at 120MHz). The MCE and 8051 microcontroller are connected via dual port RAM to process

signal monitoring and command input. An advanced graphic compiler for the MCE

MATLAB/Simulink environment, while third party JTAG based emulator tools are supported for 8051 developments. IRMCF371

comes with a small QFP48 pin lead-free package.