| 摘要 |
A multipurpose power supply suitable for a power switch driver circuit for an electronics device having one or more transistors of the same type, MOSFET, SIC or IGBT, takes an input voltage Vin and generates output voltages at four output terminals 210, 220, 230, 240. Two output terminals may be connected to voltage supply rails for driving a switched-mode power converter. The voltage output at each output terminal relative to ground is different, allowing the voltage rails to be set to voltages suitable for a variety of different power switch driver circuits by adjusting the output terminals to which the voltage rails are connected. A reference voltage is applied to one output terminal in order to set the values of the voltages at the remaining output terminals. The power supply may comprise a transformer TX21 having a primary winding and a plurality of secondary windings S21, S22, S23 to set the voltages of the four output terminals relative to each other. The power supply may comprise three output stages, each comprising a secondary winding, a diode and a capacitor C21, C22, C23 in parallel with the secondary winding. |
