US 11,888,414 B2 · Driving circuit and driving method

Abstract

A driving circuit and a driving method are provided. The driving circuit includes a power stage circuit and a full-bridge circuit. The power stage circuit is configured to receive an input voltage, and generate an output voltage at an output port of the power stage circuit. The full-bridge circuit is coupled to the output port of the power stage circuit and is configured to perform charging and discharging on a piezoelectric load. An operating mode of the full-bridge circuit is controlled, so that a supply voltage signal 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 during a second operating interval of the operating cycle corresponds to the reference voltage in a second interval. The driving circuit has a small volume, which is conducive to circuit integration.

Claims21

Dependent claims

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.

1 more element

A driving method applicable to a driving circuit, wherein the driving circuit comprises:

a power stage circuit for receiving an input voltage, and generating an output voltage at an output port of the power stage circuit;
and
a full-bridge circuit coupled to the output end of the power stage circuit and for performing charging and discharging on a piezoelectric load coupled to an output port of the full-bridge circuit;
and wherein the driving method comprises:
controlling an operating mode of the full-bridge circuit to control:
a supply voltage signal generated by the full-bridge circuit for driving the piezoelectric load during a first operating interval of an operating cycle to correspond to a reference voltage in a first interval;
and
the supply voltage signal generated during a second operating interval of the operating cycle to correspond to the reference in a second interval;
and
during the first or the second operating interval, controlling first to fourth power switches in the full-bridge circuit to operate in one of a turn-off state and a linear mode, so that the supply voltage signal corresponds to the reference voltage.

7 more elements

A driving method applicable to a driving circuit, wherein the driving circuit comprises:

a power stage circuit for receiving an input voltage, and generating an output voltage at an output port of the power stage circuit;
and
a full-bridge circuit coupled to the output end of the power stage circuit and for performing charging and discharging on a piezoelectric load coupled to an output port of the full-bridge circuit;
and wherein the driving method comprises:
controlling an operating mode of the full-bridge circuit to control:
a supply voltage signal generated by the full-bridge circuit for driving the piezoelectric load during a first operating interval of an operating cycle to correspond to a reference voltage in a first interval;
and
the supply voltage signal generated during a second operating interval of the operating cycle to correspond to the reference in a second interval;
and
during a first part of the first or the second operating interval, controlling first to fourth power switches in the full-bridge circuit to operate in one of a turn-off state and a linear mode;
and during a second part of the first or the second operating interval, controlling the first to fourth power switches to be turned on or off.

8 more elements

Dependencies are inferred from the claim text.

Driving circuit and driving method

Life of this patent

Driving circuit and driving method

Life of this patent

Abstract

Claims21