![]() The operating voltage of converter is determined by the specifications of the switching element, like MOSFET or IGBT. The following items are the points that should be noted when selecting an isolated gate driver power supply. ![]() Using photocoupler and isolated power supply are the common method to have galvanic isolation, as shown in Figure 1(b). When the system operating voltage is about hundreds or kilovolts, having galvanic isolation between the controller and switching component is essential. For a system with low operating voltage, switching component can directly connect to the controller, as long as the withstand voltage of the controller is within the allowable range, as shown in figure 1(a).
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