Microchip enables the benefits of digital power conversion with the dsPIC SMPS and Digital Power Conversion family of devices. These devices include peripherals designed specifically for power conversion applications such as 1 nanosecond resolution Pulse Width Modulators (PWM), 4 MSPS Analog to Digital Converters (ADC), and on chip high speed Analog Comparators with integrated programmable reference voltages.
In this typical application the AC-DC design unit works with universal input voltage range [85 - 65 VAC], and produces multiple DC outputs. The design is based on a modular structure, which features three major power stages. The input stage is a PFC Boost Converter, the intermediate stage is a Phase-Shifted Zero Voltage Transition (ZVT) Converter, which includes ZVT Full Bridge Converter and Synchronous Rectification, and the third stage is Single-phase and Multi-phase Buck Converters.
Implementing advanced software digital control loops for power applications requires a high-performance DSP engine along with specialized peripherals. The high-performance CPU and rich peripherals of the dsPIC DSC devices enable solutions that do not require much in the way of external support chips. In addition to the space and cost-saving benefits found in the dsPIC DSC solutions, special features enable advanced power conversion.
These devices include peripherals specifically designed for power conversion. Peripherals such as a high speed PWM, ADC and analog comparators can be tied together using an internal configurable control fabric that enables them to interact directly with one another, resulting in stunning performance gains in digital power applications.