What function does the power transformer have in a power supply?

The power transformer in a power supply is designed to either step up or step down voltage depending on the application needed. This versatility allows it to adapt to various input and output voltage requirements in electrical systems. For example, if the incoming voltage is high and needs to be lowered for safe use in electronic devices, the transformer can step down the voltage. Conversely, if the voltage needs to be increased for transmission or specific device requirements, the transformer can also step up the voltage.

The capability to handle both stepping up and stepping down voltages ensures that power supplies can be tailored to different electrical needs, making the transformer a crucial component in maintaining the appropriate voltage levels for safe and effective operation of devices. This function is essential in various applications, from residential electronics to industrial power equipment.