US 11,894,773 B2
Buck-boost circuit and control method therefor
Yongjin Wang, Shanghai (CN)
Assigned to SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD., Shanghai (CN)
Appl. No. 17/426,614
Filed by SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD., Shanghai (CN)
PCT Filed Mar. 5, 2019, PCT No. PCT/CN2019/077014
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/155289, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 201910081697.2 (CN), filed on Jan. 28, 2019.
Prior Publication US 2022/0094268 A1, Mar. 24, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 3/07 (2006.01)
CPC H02M 3/1582 (2013.01) [H02M 3/07 (2013.01); H02M 3/158 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A buck-boost circuit, comprising a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first inductor, a first capacitor, and a second capacitor,
wherein a first terminal of the first switch is connected to an anode of an input power supply; a first terminal of the second switch is connected to the anode of the input power supply; a first terminal of the third switch and a first terminal of the first capacitor are connected to a second terminal of the first switch; a second terminal of the third switch is connected to a cathode of the input power supply; a first terminal of the fourth switch, a second terminal of the first capacitor, and a first terminal of the first inductor are connected to a second terminal of the second switch; a second terminal of the fourth switch is connected to the cathode of the input power supply; a second terminal of the first inductor is connected to an anode of an output power supply; the second capacitor is connected in parallel between the anode and a cathode of the output power supply; and the fifth switch is connected between the second terminal of the first capacitor and the second terminal of the second switch.