Patent ID: 11894773
Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. The buck-boost circuit according to claim 1, further comprising:
a control module configured to control switches based on a relationship between a target voltage Vtar and an input voltage VBAT,
wherein said controlling the switches comprises:
in response to Vtar<VBAT−ΔV being satisfied, turning off the fifth switch, enabling the first switch and the third switch to be in opposite states or to be both in an off state, and complementarily turning on the second switch and the fourth switch, wherein ΔV denotes a set voltage difference;
in response to VBAT−ΔV≤Vtar<VBAT+ΔV being satisfied, complementarily turning on the first switch and the third switch, complementarily turning on the fourth switch and the fifth switch, and turning on the second switch from turning-off of the first switch to turning-on of the fourth switch; and
in response to Vtar>VBAT+ΔV being satisfied, turning on the fifth switch, turning off the fourth switch, enabling both the second switch and the third switch to operate simultaneously, and complementarily turning on the second switch and the first switch.