CPC H05B 45/3725 (2020.01) [H02J 3/0075 (2020.01); H02J 3/14 (2013.01); H02M 1/0009 (2021.05); H02M 1/0083 (2021.05)] | 11 Claims |
1. A power supply device, comprising:
a power converter;
a blocking switch, wherein a first terminal of the blocking switch is coupled to an output terminal of the power converter, and a second terminal of the blocking switch is coupled to a load; and
a controller coupled to the power converter and the blocking switch, and configured to control the power converter to provide an output power, wherein the controller comprises:
a first detection circuit configured to detect the output power to obtain a first detection result, wherein the first detection result is a variation of an output current value of the output power; and
a second detection circuit configured to detect electrical characteristics of at least one of the power converter and the blocking switch to obtain a second detection result, wherein the electrical characteristics are different from the output current value,
wherein the controller determines whether to limit output of the output power according to a relationship between the first detection result and the second detection result.
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