Controllers for digital power conversion

28 April 2010 DSP, Micros & Memory

Microchip has expanded its 16-bit dsPIC digital signal controller (DSC) portfolio for digital power conversion applications. The dsPIC33F ‘GS’ series provides on-chip peripherals specifically designed for high-performance, digital power supplies. These peripherals include high-speed PWMs, ADCs and analog comparators. The newly expanded product family supports applications such as induction cooking, uninterruptible power supplies, solar and pure sine-wave inverters, intelligent battery chargers, power factor correction, HID lighting, fluorescent lighting, LED lighting, and AC-DC and DC-DC power converters.

These new DSCs provide up to four times the memory compared to Microchip’s existing SMPS and digital power conversion families. Additionally, they can be configured for a variety of topologies, giving power supply designers the freedom to optimise for specific product applications. The eight new DSCs offer up to 18 channels of PWMs with 1 ns resolution, enabling a number of completely independent digital control loops.

The eight new dsPIC33F ‘GS’ series DSCs enable digital control loops with 12 to 18 high-speed, 1 ns resolution PWMs and one or two 10-bit, on-chip ADCs, providing 2 to 4 million samples per second for low latency and high-resolution control. They range from 64 to 100 pins and 32 to 64 KB Flash memory.

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