Summary
This reference design provides an easy method to evaluate the power, and features of SMPS dsPIC
Digital Signal Controllers for high wattage AC - DC conversion application. Discover the many benefits of digital power control implementation in this reference design. The SMPS AC - DC Reference Design unit works with universal input voltage range, and produces multiple DC outputs. The design is based on a modular structure, which features three major power stages; the input stage, intermediate stage and the third stage, a Point of Load. 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. This reference design uses two dsPIC33F16GS504 devices; one used for the PFC Boost Converter and ZVT Full Bridge Converter, while the other dsPIC DSC is used for Single-phase and Multi-phase Buck Converters.
Features
Key features of SMPS AC - DC Reference Design
- Operates at universal input voltage (85-265Vac, 45-65Hz)
- Operates up to 300W sustained output
- Full Load operation on 3.3V and 5V outputs when loaded individually and/or simultaneously:
o 3.3V output @ 56A
o 5V output @ 23A
- Power Factor Performance of 0.99 at full load (110Vac/220Vac)
- Fault Indication and Protection
- Excellent Dynamic Load Performance and Output Sequencing
- Separate boards, one for digital signals (Signal Board) and the other for the Power stages (Power Board)
- Signal Board has two dsPIC33F16GS504 devices controlling different power stages
- MPLAB ICD 2 or REAL ICE support
Package Contents:
- Integrated Signal Board and Power Board with enclosure
- Documentation CD consisting of:
o AC - DC SMPS Reference Design Software
o AC - DC Schematics and PCB Layout files
o AC - DC SMPS Reference Design User’s Guide
o Test Results
o Readme file
Cable Assembly