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Freescale has introduced a range of digital signal controllers (DSCs) designed to provide energy-efficient motor control.

The MC56F8006 range is claimed to be one of the most energy-efficient DSC portfolios available in the embedded market.

The company said that it is also one of the most cost effective, helping reduce development expenses and power consumption for a wide range of motor control and motor drive applications, including appliances.

The advanced motor control and power conversion capabilities of these DSCs are designed to improve the efficiency, reliability and energy savings of appliances.

For example, a washing machine motor controlled by a DSC can enable more efficient agitation cycles that use less water and shorter spin cycles to reduce drying time and energy consumption.

The MC56F8006 DSCs combine the functionality of a microcontroller (MCU) and the processing power of a digital signal processor (DSP) with a flexible set of peripherals to create an embedded control solution.

The features of the MC56F8006 make it suitable for power- and cost-sensitive motor control applications, such as three-phase BLDC motors, variable frequency drives, permanent magnet synchronous motors and hand-held tool motors.

In addition to motor control, MC56F8006 DSCs can be used to reduce the cost and complexity of digital power conversion applications, such as board-mounted digital power supplies for servers, industrial and telecom power supplies, and smart power metering.

The signal processing capabilities of the MC56F8006 can also be applied to advanced lighting control in commercial buildings and factories.

The devices are designed to operate at 50mA, at 32MHz and 3.3V.

The DSCs provide an array of power-saving features such as two power-saving Stop modes, the ability to shut down peripherals independently and fast wake-up time from Stop (less than six microseconds).

The energy-efficient devices also feature a very low-power crystal oscillator and ADC modules with ultra-low run current and conversion speed.

Advanced power management capabilities enable continued application sampling in a reduced power state, which helps extend battery life.

A partial power-down mode keeps the I/O, RAM, pulse width modulator (PWM) and computer operating properly (COP) module powered while the remainder of the device peripherals shut down.

In this state, the DSCs are engineered to consume 1uA in lowest power mode while preserving key state information in RAM.

The MC56F8006 range includes on-chip peripherals that are specifically designed to enhance the performance of motor control and power conversion applications and to reduce external component count and overall cost.

Key peripherals include three high-speed comparators, dual 12-bit analogue-to-digital controllers (ADCs), two programmable gain amplifiers (PGAs) and a PWM with up to six outputs.

The on-chip ADCs allow flexible configuration to meet high-performance and low-power requirements.

The PGAs operate in concert with the ADCs to amplify small signals, increasing the ADC input dynamic range.

The PGAs also perform differential-to-single-ended conversion of analogue signals and enable precise conversion of analogue values.

The PWMs enhance power conversion functionality and accuracy for digital power supply and motor control applications.

Multiple system faults are detected and processed by on-board hardware to immediately shut down the PWMs in the event of a threatening or dangerous situation.

This capability helps ensure system protection with little or no software intervention required.

Freescale’s development tools, combined with the MC56F8006 range, are designed to enable developers to speed time to market.

To ease the development process, Freescale offers software tools, demonstration boards, reference designs, application notes, software examples and webinars.

Codewarrior Development Studio for MC56800/E DSCs helps designers to build and deploy DSC systems quickly and easily.

A complimentary Codewarrior license for up to 32KB application code (sufficient for MC56F8006 products) is available through web-based registration.

Freescale also provides the Processor Expert rapid application design tool to enable quick generation of peripheral drivers and software libraries.

The Processor Expert tool features an extensive library of DSP/DSC algorithms, a library of low-level macro commands for peripherals, plus motor control, power conversion and soft modem code examples to help streamline the development process.

Freescale Semiconductor

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