US 11,817,780 B2
Power supply circuit and semiconductor device including the power supply circuit
Kei Takahashi, Kanagawa (JP); and Takeshi Aoki, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/288,957
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Oct. 21, 2019, PCT No. PCT/IB2019/058933
§ 371(c)(1), (2) Date Apr. 27, 2021,
PCT Pub. No. WO2020/089725, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-207319 (JP), filed on Nov. 2, 2018.
Prior Publication US 2021/0408902 A1, Dec. 30, 2021
Int. Cl. H02M 3/155 (2006.01); H02M 1/00 (2006.01); H01L 27/12 (2006.01); H01L 29/786 (2006.01); H10B 12/00 (2023.01)
CPC H02M 3/155 (2013.01) [H01L 27/124 (2013.01); H01L 27/1207 (2013.01); H01L 27/1225 (2013.01); H01L 27/1255 (2013.01); H01L 29/7869 (2013.01); H01L 29/78648 (2013.01); H02M 1/0009 (2021.05); H10B 12/00 (2023.02)] 5 Claims
OG exemplary drawing
 
1. A power supply circuit comprising:
a power converter circuit configured to supply power to a load;
a current sensing circuit configured to generate a first signal comprising data on current flowing through the load;
a voltage sensing circuit configured to generate a second signal comprising data on voltage applied to the load;
a correction circuit comprising a digital filter, a digital-analog converter circuit to which a signal output from the digital filter is input, and a sample-and-hold circuit for retaining a signal output from the digital-analog converter circuit, the correction circuit configured to generate a third signal obtained by correcting the second signal;
a selection circuit configured to select one of the first signal and the third signal;
an output circuit configured to generate an output signal for controlling the power converter circuit in accordance with a signal selected by the selection circuit; and
a control signal generation circuit configured to control switching between a first operation for generating the output signal in accordance with the first signal and generating the third signal and a second operation for generating the output signal in accordance with the third signal.