Splendid for EV infrastructure and high-power functions, this design empowers engineers with scalable efficiency and confirmed reliability.
The STDES-6KWHVDCDC reference design from STMicroelectronics is a high-performance 6 kW high-voltage DC-DC converter optimized for electrical car (EV) charging infrastructure. It serves as a priceless design help for engineers creating energy conversion techniques in automotive, industrial, and renewable power functions. This reference design demonstrates how superior digital management methods and state-of-the-art energy gadgets could be built-in right into a compact and environment friendly resolution for high-voltage power conversion. Its versatile structure, excessive effectivity, and huge output vary make it extremely related to engineers in search of scalable and dependable energy supply techniques.
On the core of the STDES-6KWHVDCDC is a totally digital, full-bridge LLC resonant converter structure, offering excessive effectivity and design versatility. The system options two {hardware} configurations—a twin transformer variant optimized for narrower voltage ranges (200–500 V or 500–1000 V relying on the winding configuration), and a single transformer variant designed for a broader output voltage span of 200–1000 V. Each variations share the identical PCB, permitting designers to adapt the magnetic elements in response to system wants with out redesigning the board structure.
Key to the design’s effectivity is a patented management scheme that permits frequency foldback. This method maintains excessive effectivity—as much as 98%—throughout various load and output voltage situations. Silicon carbide (SiC) diodes, particularly the STPSC40H12CWL, are used within the output rectification stage to make sure quick switching and decreased losses. For the LLC switching stage, ST employs the STW40N95DK5 MDmesh DK5 Energy MOSFETs, chosen for his or her high-voltage dealing with and low RDS(on) traits.
The digital management is managed by the STM32G474RET6 microcontroller, which provides superior timer options, analog peripherals, and computational capabilities tailor-made for energy conversion duties. The management logic drives the facility stage via remoted gate drive transformers and PM8834MTR gate driver ICs, making certain sturdy sign integrity and isolation. The auxiliary energy provide is referenced to the secondary floor and helps the gate drivers, MCU, and sign conditioning circuitry.
This reference design additionally emphasizes security, incorporating complete safety mechanisms appropriate for demanding EV charging environments. It demonstrates how ST’s energy and management merchandise could be built-in to attain sturdy, compact, and environment friendly energy electronics techniques. With formal testing validating its efficiency, the STDES-6KWHVDCDC provides engineers a ready-to-use blueprint for high-voltage DC-DC conversion in EV charging and different high-power functions.
ST Mircoelectronics has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has extra information in regards to the reference design. To learn extra about this reference design, click on right here.
