3-Part Energy Issue Correction Reference Design

The PFC reference design is tailor-made for HEV/EV chargers and high-power SMPS functions, reaching 98.6% effectivity with superior SiC know-how.

Three-phase Energy Issue Correction (PFC) is crucial for bettering the effectivity and stability of energy programs in industrial and business settings. It enhances the ability issue by aligning the voltage and present phases, thereby lowering reactive energy, which doesn’t contribute to precise work. This correction not solely helps decrease vitality prices by lowering demand expenses but additionally will increase {the electrical} system’s capability, ensures voltage stability, minimizes transmission losses, and aids in complying with regulatory requirements. Consequently, PFC is a important part for optimizing energy utilization and prolonging the lifespan {of electrical} infrastructure. The MSCSICPFC/REF5 is a 3-phase Vienna PFC reference design from Microchip tailor-made for Hybrid Electrical Car/Electrical Car (HEV/EV) chargers and high-power Swap Mode Energy Provide (SMPS) functions.

The reference design incorporates Silicon Carbide (SiC) know-how, using our mSIC™ MOSFETs and Schottky Barrier Diodes (SBDs), and achieves a powerful 98.6% effectivity with a 30 kW output. The MOSFET options low capacitances and gate cost, facilitating quick switching speeds as a result of a low inner gate resistance (ESR). It ensures steady operation even at excessive junction temperatures, with a most ranking of 175°C. Moreover, it features a quick and dependable physique diode and reveals superior avalanche ruggedness. The system can be RoHS compliant, adhering to strict environmental requirements. The SBDs are AEC-Q101 certified, guaranteeing reliability for automotive functions. It options no reverse restoration, low ahead voltage, and low leakage present, enhancing total effectivity.

The design is optimized for 30 kW functions and options 1200V mSiC diodes and 700V mSiC MOSFETs, that are constructed to deal with excessive avalanche/repetitive Unclamped Inductive Switching (UIS). It helps a 3-phase 380/400V RMS enter voltage at 50 Hz or 60 Hz and affords a 700V DC output voltage. The switching frequency is about at 140 kHz. The PCB structure is meticulously engineered for security, present stress, mechanical stress, and noise immunity. Management is managed digitally utilizing a dsPIC33CH Digital Sign Controller (DSC), enhancing the system’s total efficiency and reliability.

The design challenges embrace sustaining excessive effectivity all through the output energy vary, minimizing line frequency harmonics throughout the identical vary, and creating scalable, high-power-density designs. These aims are important for optimizing efficiency and guaranteeing the system’s effectiveness and reliability beneath various operational situations.

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Microchip has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and so forth. You could find further information concerning the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.