Microchip Microcontrollers – PIC18F4331/4431 and PIC18F2331/2431

The 40-pin PIC18F4331/4431 and 28-pin PIC18F2331/2431 microcontrollers (MCUs) from Microchip feature new advanced motor control peripherals that deliver better efficiency, quieter operation, greater range and extend the life of motors in automotive, industrial, appliance and consumer applications.

Manufacturers are under increasing pressure, due to stringent worldwide environmental regulations, to increase energy efficiency across a broad range of motor-driven products. Microchip’s 40-pin PIC18F4331/4431 and 28-pin PIC18F2331/2431 microcontrollers (MCUs) provide a complete solution for extremely precise and energy-efficient operation in sophisticated motor control applications through advanced analog and digital feedback, and the new three-phase complimentary Pulse Width Modulation (PWM) control system.

Key to the performance and flexibility of the PIC18Fxx31 family are three new modules specifically designed for advanced motion and power control applications. The power control module has a three-phase PWM structure; the motion feedback module includes a quadrature encoder interface; the third module consists of a high-speed Analog to Digital Converter (ADC), which operates at 200ksps and can be synchronized with the PWM. Together, these modules eliminate the need for any external motor control components, such as a high-speed converter and a resonator, thereby providing a lower-cost solution and saving board space.

Other significant features of the PIC18Fxx31 devices include: up to eight PWM channels with 14-bit resolution, center alignment, programmable dead-time and two external fault-protection inputs; two Capture/Compare/PWM modules; an Internal RC Oscillator with eight selectable frequencies ranging from 8MHz to 31.25KHz; four general-purpose Timers; a Clock Monitor for fail-safe operation; an Enhanced USART supporting RS485, RS232 and the LIN protocol; 256 Bytes of on-board, high-endurance data EEPROM; up to 10 MIPS performance at 40MHz; a 16-level Programmable Low Voltage Detection module; and nanoWatt Technology features that provide enhanced power-management capabilities.

With all of these features and design enhancements, the PIC18Fxx31 family is an ideal solution for advanced power control and motor control applications in markets like: Automotive (stability control, climate control, fuel and oil pumps, electronic power steering and throttle control); Appliance (dishwashers, refrigerators, washing machines and ventilation fans); Industrial (robotics, material handling, HVAC, vending machines); and Consumer (whirlpool tubs, toasters/grills, bathroom fans).

The PIC18F4331/4431 devices are available in 40-pin DIP, and 44-pin TQFP and QFN packages. The PIC18F2331/2431 parts are offered in 28-pin SDIP, SOIC and QFN packages.

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