US 11,888,414 B2
Driving circuit and driving method
Zhiwei Xu, Zhejiang (CN); Chiqing Fang, Zhejiang (CN); and Chen Zhao, Zhejiang (CN)
Assigned to SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD, Hangzhou (CN)
Filed by SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD, Zhejiang (CN)
Filed on Aug. 17, 2021, as Appl. No. 17/404,891.
Claims priority of application No. 202010841300.8 (CN), filed on Aug. 20, 2020.
Prior Publication US 2022/0060126 A1, Feb. 24, 2022
Int. Cl. H02N 2/06 (2006.01); H02M 3/07 (2006.01)
CPC H02N 2/06 (2013.01) [H02M 3/07 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A driving circuit for driving a piezoelectric load, comprising:
a power stage circuit configured to receive an input voltage, and generate an output voltage at an output port of the power stage circuit; and
a full-bridge circuit coupled to the output port of the power stage circuit, and configured to perform charging and discharging on the piezoelectric load coupled to an output port of the full-bridge circuit,
wherein an operating mode of the full-bridge circuit is controlled, so that a supply voltage signal generated by the full-bridge circuit for driving the piezoelectric load during a first operating interval of an operating cycle corresponds to a reference voltage in a first interval, and the supply voltage signal generated during a second operating interval of the operating cycle corresponds to the reference voltage in a second interval, wherein the reference voltage in the first interval is a rising part of the reference voltage in a cycle, and the reference voltage in the second interval is a falling part of the reference voltage in the cycle.