Title:
AUXILIARY POWER SUPPLY CIRCUIT AND POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2021145527
Kind Code:
A
Abstract:
To provide an auxiliary power supply circuit capable of supplying auxiliary power to a high potential node.SOLUTION: An auxiliary power supply circuit (1) receives power from an auxiliary power supply (AV1) in which a negative node is connected to a switch node, and supplies the power to a capacitor (AV2) in which a negative node is connected to a high potential node. The auxiliary power supply circuit (1) includes a switching element (HS1) connected between the high potential node and the switch node, and a diode (SD1) in which an anode is connected to a positive electrode of the auxiliary power supply (AV1) and a cathode is connected to a positive electrode of the capacitor (AV2). A voltage of the stitching node alternately switches between (i) a first voltage almost equal to the voltage of the high potential node and (ii) a second voltage lower than the first voltage.SELECTED DRAWING: Figure 1
Inventors:
SHIOMI TAKESHI
Application Number:
JP2020044289A
Publication Date:
September 24, 2021
Filing Date:
March 13, 2020
Export Citation:
Assignee:
SHARP KK
International Classes:
H02M3/155
Attorney, Agent or Firm:
Harakenzo world patent & trademark