IRMCF371
Outline Sheet No. 11-03-06
IRMCF371
Sensorless Motor Control IC for Appliances
Features
Product Summary
Maximum crystal frequency
MCETM (Motion Control Engine) - Hardware based
computation engine for high efficiency sinusoidal
sensorless control of permanent magnet AC motor
Supports both interior and surface permanent
magnet motors
60 MHz
128MHz
Maximum internal clock (SYSCLK) frequency
Sensorless control computation time
MCETM computation data range
11 μsec typ
16 bit signed
Built-in hardware peripheral for single shunt
current feedback reconstruction
Program RAM loaded from external EEPROM 48K bytes
Data RAM
8K bytes
2 μsec
No external current or voltage sensing operational
amplifier required
GateKill latency (digital filtered)
PWM carrier frequency counter
A/D input channels
16 bits/ SYSCLK
4
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)
I2C/SPI serial interface
Watchdog timer with independent analog clock
Three general purpose timers/counters
Two special timers: periodic timer, capture timer
A/D converter resolution
A/D converter conversion speed
8051 instruction execution speed
Analog output (PWM) resolution
UART baud rate (typ)
12 bits
2 μsec
2 SYSCLK
8 bits
57.6K bps
13
Number of I/O (max)
Package (lead-free)
QFP48
External EEPROM and internal RAM facilitate
debugging and code development
Pin compatible with IRMCK371, OTP-ROM version
1.8V/3.3V CMOS
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 (MCETM) for sensorless control of permanent
magnet motors; the other is an 8-bit high-speed microcontroller (8051). Both computation engines are integrated into one
monolithic chip. The MCETM contains a collection of control elements such as Proportional plus Integral, Vector rotator, Angle
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 MCETM is seamlessly integrated into the
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.
This document is the property of International Rectifier and may not be copied or distributed without expressed consent.
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