Power supply reference design is for SiC MOSFETs and IGBT gate drivers
Technically mature circuit templates by Würth Elektronik are available for free download to help developers. The latest is the RD002, a 6W unipolar isolated auxiliary power supply for SiC MOSFETs and IGBT gate drivers. The reference design explains the setup of a 27 x 14 x 14mm small board with adjustable output voltage.
The reference design delivers a unipolar output voltage of 15 to 20V at 6W of power and can be used in battery chargers, solar system inverters, AC motors or switch mode power supplies with SiC MOSFETs.
The circuitry and layout includes an isolated, low power auxiliary power supply, typically with a flyback, push-pull, or half-bridge topology. This provides the gate drive voltage level and power required to turn the SiC transistor on and off, as well as galvanic isolation between the high voltage and low voltage sides. Isolation is necessary, not only to meet the relevant safety standards, but also to reduce electrical interference due to coupling between the primary and secondary sides of the converter. Würth Elektronik explained this in turn enhances EMC and the stability of the gate driver control. The transformer in the auxiliary power supply is the WE-750318114. The reference design presents the circuitry and components and shows different layout variants.
According to Falco Eleazar, application engineer at Würth Elektronik eiSos, the reference designs save a lot of time and engineers can be sure that the components featured are reliably available from stock.
Würth Elektronik eiSos Group manufactures electronic and electromechanical components for the electronics industry. It is one of the largest European manufacturers of passive components and is active in 50 countries. There are also production sites in Europe, Asia and North America.
The company’s product range includes EMC components, inductors, transformers, RF components, varistors, capacitors, resistors, quartz crystals, oscillators, power modules, wireless power transfer, LEDs, sensors, connectors, power supply elements, switches, push-buttons, connection technology, fuse holders and solutions for wireless data transmission.
The company offers availability of all catalogue components from stock without minimum order quantity, as well as free samples and support through technical sales staff and selection tools.
Würth Elektronik is part of the Würth Group.
