IRMCF312_15 Datasheet, PDF (1/35 Pages) International Rectifier – Dual Channel Sensorless Motor Control IC

Data Sheet No. PD60300-A
IRMCF312
Dual Channel 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
„ Integrated Power Factor Correction control
„ 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
„ Dual channel three/two-phase Space Vector PWM
„ Three-channel analog output (PWM)
„ Embedded 8-bit high speed microcontroller (8051)
for flexible I/O and man-machine control
„ JTAG programming port for emulation/debugger
„ Two 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
„ _{External EEPROM and internal RAM facilitate}
debugging and code development
„ _{Pin compatible with IRMCK312, 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
MCE^TM computation data range
11 μsec typ
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
11
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)
36
Package (lead-free)
QFP100
Description
IRMCF312 is a high performance RAM based motion control IC designed primarily for appliance applications. IRMCF312 is
designed to achieve low cost and high performance control solutions for advanced inverterized appliance motor control.
IRMCF312 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.
IRMCF312 comes with a small QFP100 pin lead-free package.
Rev 1.1