El Segundo, Calif. - International Rectifier's IRMCK201 and IRMCK203 digital controller chips, the latest members of the company's iMOTION integrated design platform, ease the task of configuring motion control algorithms for permanent magnet and AC induction motor systems requiring both speed and precision.
These ICs contain a Motion Control Engine (dedicated hardware logic) that serves as an alternative to traditional motor driver controllers, which rely on digital signal processors or microprocessor control units. Instead, these chips facilitate simple system commands while retaining system flexibility via menu-driven selections. The dedicated hardware approach ultimately secures faster closed-loop performance, and in eliminating the software development phase cuts time-to-market.
The IRMCK201 and IRMCK203, which are the company's first digital ICs of their kind, are fully compatible with the system's previously released members that include the IR2136 three-phase inverter-driver IC, the IRAM portfolio of 6- to 20-amp integrated power modules, and the IR2175 current-sensing IC (provides feedback information).
The IRMCK201, for servo applications, features an encoder feedback-based closed-loop current and velocity control. The IRMCK203, on the other hand, is for sinusoidal current-based sensorless drives, and enables the design of high-speed (100,000 rpm) and wide speed range (>20:1) applications. This chip's sensorless feedback circuits combine with a unique starting algorithm for permanent magnet AC motors to minimize torque and ripple.
The new ICs, which operate from a 3.3-volt source, include a 6 MHz serial peripheral interface (SPI) port for handling external master/slave devices. The chips support RS-232, RS-422, and RS-485 specs. The IRMCK201, in a 100-pin QFP, is priced at $13.85 each, and the IRMCK203 (80-pin QFP) is $19.85 each, both in 10k quantities. Design assistance is available using the company's ServoDesigner and IRMCS2011 hardware development platform that's available at the company's web site.