With more and more electronic devices around us, a variety of power adapters are naturally inevitable. For the convenience of charging, many of us like to plug the power adapter into the socket, but it will be slow even if the device is not connected. Slow power consumption, then why does the power adapter consume power when it is empty? Left Center Right Remove click to add a caption Most power adapters belong to the switching power supply. The 220V is first rectified into DC power, then converted by high frequency, and coupled by pulse transformer, and unidirectional rectified output is low voltage DC. Even if there is no output current, the high frequency conversion section is still working and needs to consume some of the power. For example, the control circuit in the charger is mainly whether the sensing device is connected to the power adapter, and the control circuit is also working when the power adapter is not connected to...
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