Freescale has announced the first family in its next-generation Digital Signal Controllers (DSCs) portfolio, the MC56F84xx, which integrates high-speed analog functionality with an efficient 32-bit digital signal processor core to provide precise and accurate digital control for power supplies (digital power conversion) and motors. Previous DSC devices where based on 16-bit cores.
The company believes that even small improvements in the efficiency of power supplies, motors and lighting systems – sources of huge energy demand – through the use of digital control systems could have a major impact on global energy consumption
Increased system stability for motor control applications results in motors that run more efficiently and quietly (in a dishwasher or other appliance, for example). The benefits of increased system stability for power supplies include reduced energy waste and heat. When less heat is generated, designers can reduce costs and system size.
A server room with power supplies that generate less heat requires less energy for cooling, and circuit board designs that have less heat to dissipate can be smaller (improved power density), reducing system size and cost and allowing 'miniaturization' of the application.
The MC56F84xx family is targeted at high-end digital power supplies, such as those used for servers in data centers by providing the combination of high performance and precision with a 32-bit core, high-res pulse-width modulation (PWM) and ADC (AC/DC conversion).
Optimized for digital signal processing, the 100 MHz/100 MIPS 32-bit core increases the execution of the control loop. Fast control loops are driven via single-cycle math computation, fractional arithmetic support and parallel moves, supported by the Harvard-style architecture.
The high-res PWM with 312 pico-second resolution provides precise and stable control across extended temperatures while dual, 12-bit ADCs with built-in PGA sampling up to 3.3 mega samples per second improves real-time control.
Memory protection features restrict access to key modules, helps ensure reliable solutions while on-chip comparators reduce system component cost.
Programmable flash memory scales from 64 KB to 256 KB and Freescale's FlexMemory EEPROM capability supports frequent event captures while direct memory access (DMA) helps ensure fast data transfers without core interruption.