US 12,218,592 B2
Control circuit for DC/DC converter
Akihiro Kawano, Kyoto (JP); and Hiroaki Ando, Kyoto (JP)
Assigned to ROHM CO., LTD, Kyoto (JP)
Filed by ROHM CO., LTD., Kyoto (JP)
Filed on Aug. 26, 2022, as Appl. No. 17/896,140.
Application 17/896,140 is a continuation of application No. PCT/JP2021/006790, filed on Feb. 24, 2021.
Claims priority of application No. 2020-034054 (JP), filed on Feb. 28, 2020; and application No. 2020-043157 (JP), filed on Mar. 12, 2020.
Prior Publication US 2022/0407421 A1, Dec. 22, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 3/157 (2006.01); H02M 1/32 (2007.01)
CPC H02M 3/158 (2013.01) [H02M 3/157 (2013.01); H02M 1/32 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A control circuit of a DC/DC converter that boosts an input voltage VIN and generates an output voltage VOUT, the control circuit comprising:
a main comparator structured to compare a feedback voltage corresponding to an output voltage of the DC/DC converter with a reference voltage, and to assert a turn-on signal when the feedback voltage falls below the reference voltage; and
a timer circuit structured to generate a turn-off signal that transitions in level after an ON time that is proportional to (VOUT−VIN)/VOUT has elapsed from assertion of the turn-on signal.