US 12,294,300 B2
Switch control circuit, voltage output device, and vehicle
Hironori Sumitomo, Kyoto (JP)
Assigned to Rohm Co., Ltd., Kyoto (JP)
Filed by ROHM CO., LTD., Kyoto (JP)
Filed on Dec. 9, 2022, as Appl. No. 18/078,365.
Claims priority of application No. 2021-204765 (JP), filed on Dec. 17, 2021.
Prior Publication US 2023/0198401 A1, Jun. 22, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/088 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0009 (2021.05); H02M 1/088 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A switch control circuit configured to control a first switch having a first terminal to which a first voltage is applied, and a second switch having a first terminal connected to a second terminal of the first switch and a second terminal to which a second voltage lower than the first voltage is applied, the switch control circuit comprising:
a first sampling/holding circuit configured to sample and hold a switch voltage generated at a connection node between the first switch and the second switch when the second switch is turned off;
a first comparison circuit configured to compare the switch voltage sampled and held by the first sampling/holding circuit with a first constant voltage; and
a first dead time adjustor configured to adjust a dead time when the switch voltage rises according to an output of the first comparison circuit,
wherein the first dead time adjustor includes a counter configured to perform a counting operation according to the output of the first comparison circuit.