US 12,334,829 B2
DC-DC converter that converts direct current into another direct current
Koichi Tsuno, Wako (JP); Toshio Inoue, Wako (JP); and Ryo Oshima, Wako (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Apr. 28, 2023, as Appl. No. 18/140,999.
Application 18/140,999 is a continuation of application No. PCT/JP2020/046470, filed on Dec. 14, 2020.
Prior Publication US 2023/0261579 A1, Aug. 17, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 1/14 (2006.01)
CPC H02M 3/33515 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0032 (2021.05); H02M 3/33573 (2021.05); H02M 1/14 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A DC-DC converter comprising:
a conversion circuit configured to convert a direct current input voltage supplied from a direct current power supply into a direct current output voltage;
a current detection circuit configured to detect an input current supplied from the direct current power supply to the conversion circuit;
an input voltage detection circuit configured to detect the input voltage;
an output voltage detection circuit configured to detect the output voltage; and
a control circuit configured to control the output voltage by supplying a pulse-shaped drive signal to the conversion circuit,
wherein the control circuit includes:
a first intermittent control mode configured to thin out pulses of the drive signal according to the input current;
a hybrid control mode combining pulse width control that controls a pulse width of the drive signal and intermittent control that thins out pulses of the drive signal; and
a second intermittent control mode configured to thin out the pulses of the drive signal according to the output voltage, and
the control circuit
selects the second intermittent control mode in a case where a duty ratio of the drive signal is a predetermined threshold or less,
selects the hybrid control mode in a case where the duty ratio of the drive signal exceeds the predetermined threshold and the input voltage is a predetermined specified value or more, and
selects the first intermittent control mode in a case where the duty ratio of the drive signal exceeds the predetermined threshold and the input voltage is less than the predetermined specified value.