2 Overview of Demonstration Application

The dsPIC33C Phase-Shifted Full-Bridge Demonstration Application (PSFB DA) is a development board that supports rapid prototyping and code development based on the Microchip dsPIC33C DSP MCU and the efficient Silicon Carbide (SiC FET) Technology. The design targets 800V to 12V automotive OBC DCDC converter applications but may also be used for any other industrial or telecom application demanding high voltage at the primary and high current on the secondary side.

The board offers well organized circuit blocks; for example: Input EMI filter and protection, SiC primary PSFB, auxiliary supply, CAN communication and a mating socket for Microchip’s newest Digital Power Plug-In Modules (DP PIMs). The pinout is compatible for CK, CH and the new AK dsPIC® DSC DP PIMs.

Table 2-1. Operation Modes
Operating ModesDescriptionStatus

800V to 12V DC-DC Buck mode for single rail operation

For output power nominal = 1200W and peak pulsed output power = 2700W @ 10 sec

Example code available in MPLAB® Discover

Parallel operation with droop control

For output power nominal = 2400W and peak pulsed output power = 5400W @ 10sec

Available in MPLAB Discover

Figure 2-1. dsPIC33C PSFB DC-DC Demonstrator Application Board
Figure 2-2. 4 kW PSFB DC-DC Converter - Simplified System Level Block Diagram