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IRMCF371 Datasheet(PDF) 1 Page - International Rectifier |
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IRMCF371 Datasheet(HTML) 1 Page - International Rectifier |
1 / 30 page Rev 1.1 Data Sheet No. PD60314 IRMCF371 Sensorless Motor Control IC for Appliances Features MCE TM (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 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 2C/SPI serial interface 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 TM computation data range 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 TM) 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 MCE TM 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 MCE TM 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. |
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