IRMCF312 International Rectifier, IRMCF312 Datasheet - Page 4

• Manufacturer Part Number: IRMCF312
• Description: Dual Channel Sensorless PM Motor Control IC
• Manufacturer: International Rectifier

Specifications of IRMCF312

• Motion Control Description: Dual Channel Sensorless PM Motor Control IC
• Package: QFP100
• Moisture Sensitivity Level: MSL3

IRMCF312
1 Overview
IRMCF312 is a new International Rectifier integrated circuit device primarily designed as a one-
chip solution for complete inverter controlled appliance dual motor control applications. Unlike a
traditional microcontroller or DSP, the IRMCF312 provides a built-in closed loop sensorless
TM
control algorithm using the unique Motion Control Engine (MCE
) for permanent magnet
TM
motors. The MCE
consists of a collection of control elements, motion peripherals, a dedicated
motion control sequencer and dual port RAM to map internal signal nodes. IRMCF312 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. The sensorless control is the same
for both motors with a single shunt current sensing capability. Motion control programming is
TM
achieved using a dedicated graphical compiler integrated into the MATLAB/Simulink
development environment. 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 IRMCF312.
IRMCF312 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,
IRMCK312 contains OTP ROM in place of program RAM to reduce the cost. Both IRMCF312
and IRMCK312 come in the same 100-pin QFP package with identical pin configuration to
facilitate PC board layout and transition to mass production
Figure 1. Typical Application Block Diagram Using IRMCF312
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