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

Claim 5:
6. 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 first switch and the third switch, 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, turning off the first switch, the third switch, and the fourth switch, and turning on the second switch; and
in response to Vtar>VBAT+ΔV being satisfied, 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.