US 12,278,473 B2
Power circuit and electronic device having the same
Hua-Hsuan Chang, Taipei (TW)
Assigned to ASUSTEK COMPUTER INC., Taipei (TW)
Filed by ASUSTEK COMPUTER INC., Taipei (TW)
Filed on Jan. 24, 2023, as Appl. No. 18/158,673.
Claims priority of application No. 111129107 (TW), filed on Aug. 3, 2022.
Prior Publication US 2024/0047959 A1, Feb. 8, 2024
Int. Cl. H02H 3/08 (2006.01); H02H 7/20 (2006.01); H02M 1/32 (2007.01)
CPC H02H 3/08 (2013.01) [H02H 7/20 (2013.01); H02M 1/32 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A power circuit, configured to connect to an adapter and adapted for supplying power to a computer system, the power circuit comprising:
a power connector, configured to connect to the adapter to receive an input voltage;
a charge unit, electrically coupled to the power connector, and comprising an input end and an output end, wherein the input end is configured to receive the input voltage, and the charge unit is configured to convert the input voltage into a system voltage and supply the system voltage to the computer system through the output end;
a short current protection circuit, electrically coupled to the charge unit, and comprising:
a detection circuit, configured to detect an impedance of at least one of the input end and the output end to generate a detection signal; and
a first logic control circuit, configured to generate a power control signal according to the detection signal; and
a first switch circuit, connected between the power connector and the input end, and controlled by the power control signal.