US-20260128664-A1 - CHARGE PUMP DRIVE CIRCUIT AND DRIVE CONTROL SYSTEM

US20260128664A1US 20260128664 A1US20260128664 A1US 20260128664A1US-20260128664-A1

Abstract

Provided are charge pump drive circuit and-a drive control system. Charge pump drive circuit includes charge pump and at least two drive units, wherein each drive unit includes control signal generation module and drive voltage output module. Control signal generation module is connected to drive voltage output module and is configured to generate first control signal and second control signal, and output first control signal and second control signal to drive voltage output module. Drive voltage output module is connected to output terminal of the charge pump, and input terminal of charge pump is configured to receive clock signal. Charge pump is configured to time-share provision of drive voltage to each drive voltage output module according to clock signal. Drive voltage output module is configured to adjust signal output mode according to first control signal and second control signal and to output drive voltage to an external electrical device.

Inventors

Xindong Duan
Bo Zhang
JIAN QING

Assignees

CHENGDU CONVENIENTPOWER SEMICONDUCTOR CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20240515
Priority Date: 20230515

Claims (15)

1 . A charge pump drive circuit, comprising a charge pump and at least two drive units, wherein each drive unit comprises a control signal generation module and a drive voltage output module; the control signal generation module is connected to the drive voltage output module; the control signal generation module is configured to generate a first control signal and a second control signal, and to output the first control signal and the second control signal to the drive voltage output module, so as to control the drive voltage output module to output a voltage; and the drive voltage output module is connected to an output terminal of the charge pump, and an input terminal of the charge pump is configured to receive a clock signal; the charge pump is configured to time-share a provision of a drive voltage to each drive voltage output module according to the clock signal; and the drive voltage output module is configured to adjust a signal output mode according to the first control signal and the second control signal and to output the drive voltage to an external electrical device.
2 . The charge pump drive circuit according to claim 1 , wherein the drive voltage output module comprises a first switch, a second switch, and a drive output terminal; a first terminal of the first switch is connected to the charge pump; a second terminal of the first switch is connected to a first terminal of the second switch and the drive output terminal, respectively; and a second terminal of the second switch is grounded; a control terminal of the first switch and a control terminal of the second switch are connected to the control signal generation module, respectively; and the drive output terminal is configured to provide a drive signal to the external electrical device.
3 . The charge pump drive circuit according to claim 2 , wherein the control signal generation module comprises a first signal generator; an output terminal of the first signal generator is connected to the control terminal of the first switch and the control terminal of the second switch, respectively; and an input terminal of the first signal generator is configured to receive a blanking signal and a first enable signal.
4 . The charge pump drive circuit according to claim 3 , wherein the first signal generator is a logic control circuit.
5 . The charge pump drive circuit according to claim 3 , wherein the control signal generation module further comprises a second signal generator; an output terminal of the second signal generator is connected to the input terminal of the first signal generator and is configured to provide the blanking signal to the first signal generator; and an input terminal of the second signal generator is configured to receive a second enable signal and the clock signal, and the second signal generator is configured to generate the blanking signal according to the second enable signal and the clock signal.
6 . The charge pump drive circuit according to claim 5 , wherein the second signal generator is a logic control circuit.
7 . A drive control system, comprising a clock signal generation device, the charge pump drive circuit according to claim 1 , at least two communication power supply devices, and a working circuit; the communication power supply devices are connected to the charge pump drive circuit and the working circuit, respectively; the charge pump drive circuit is configured to provide a drive signal to the communication power supply devices; and the communication power supply devices are configured to provide a working voltage to the working circuit based on the drive signal; and the clock signal generation device is connected to the charge pump drive circuit, and the clock signal generation device is configured to provide the clock signal to the charge pump drive circuit.
8 . The drive control system according to claim 7 , wherein the communication power supply device is a high-side power transistor, a first terminal of the high-side power transistor is connected to the working circuit, a second terminal of the high-side power transistor is connected to a power supply, and a third terminal of the high-side power transistor is connected to the charge pump drive circuit.
9 . The drive control system according to claim 8 , wherein the number of high-side power transistors is the same as the number of drive units in the charge pump drive circuit.
10 . The drive control system according to claim 9 , wherein the third terminal of each high-side power transistor is connected to the drive output terminal in the drive voltage output module of each drive unit in the charge pump drive circuit, respectively.
11 . The drive control system according to claim 7 , wherein the drive voltage output module comprises a first switch, a second switch, and a drive output terminal; a first terminal of the first switch is connected to the charge pump; a second terminal of the first switch is connected to a first terminal of the second switch and the drive output terminal, respectively; and a second terminal of the second switch is grounded; a control terminal of the first switch and a control terminal of the second switch are connected to the control signal generation module, respectively; and the drive output terminal is configured to provide a drive signal to the external electrical device.
12 . The drive control system according to claim 11 , wherein the control signal generation module comprises a first signal generator; an output terminal of the first signal generator is connected to the control terminal of the first switch and the control terminal of the second switch, respectively; and an input terminal of the first signal generator is configured to receive a blanking signal and a first enable signal.
13 . The drive control system according to claim 12 , wherein the first signal generator is a logic control circuit.
14 . The drive control system according to claim 12 , wherein the control signal generation module further comprises a second signal generator; an output terminal of the second signal generator is connected to the input terminal of the first signal generator and is configured to provide the blanking signal to the first signal generator; and an input terminal of the second signal generator is configured to receive a second enable signal and the clock signal, and the second signal generator is configured to generate the blanking signal according to the second enable signal and the clock signal.
15 . The drive control system according to claim 14 , wherein the second signal generator is a logic control circuit.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present disclosure claims the priority to the Chinese patent application with the filling No. 2023105389104 filed with the Chinese Patent Office on May 15, 2023, and entitled “CHARGE PUMP DRIVE CIRCUIT AND DRIVE CONTROL SYSTEM”, the contents of which are incorporated herein by reference in entirety. TECHNICAL FIELD The present disclosure relates to the technical field of power electronics and, specifically, to a charge pump drive circuit and a drive control system. BACKGROUND ART During the process of providing power to the working circuit, it is generally required to provide power using a high-side power transistor, and the switching of the high-side power transistor is typically driven based on the power supply of the charge pump. In the prior art, when driving multiple high-side power transistors, multiple charge pumps are commonly used to drive the multiple high-side power transistors separately. However, adopting multiple charge pumps leads to an increase in the area occupied by components within the circuit, and leads to increased power consumption of the circuit. SUMMARY The objective of the present disclosure is to provide a charge pump drive circuit and a drive control system, which can reduce the number of charge pumps used and decrease the power consumption of the circuit. The embodiments of the present disclosure are implemented as follows. The present disclosure provides the embodiment of a charge pump drive circuit, including a charge pump and at least two drive units, wherein each drive unit includes a control signal generation module and a drive voltage output module. The control signal generation module is connected to the drive voltage output module. The control signal generation module is configured to generate a first control signal and a second control signal, and to output the first control signal and the second control signal to the drive voltage output module, so as to control the drive voltage output module to output the voltage. The drive voltage output module is connected to the output terminal of the charge pump, and the input terminal of the charge pump is configured to receive a clock signal. The charge pump is configured to time-share the provision of drive voltage to each drive voltage output module according to the clock signal. The drive voltage output module is configured to adjust the signal output mode according to the first control signal and the second control signal and to output the drive voltage to an external electrical device. Optionally, the drive voltage output module includes a first switch, a second switch, and a drive output terminal. A first terminal of the first switch is connected to the charge pump, and a second terminal of the first switch is connected to a first terminal of the second switch and the drive output terminal, respectively. The second terminal of the second switch is grounded. The control terminal of the first switch and the control terminal of the second switch are connected to the control signal generation module, respectively. The drive output terminal is configured to provide a drive signal to an external electrical device. Optionally, the control signal generation module includes a first signal generator. The output terminal of the first signal generator is connected to the control terminal of the first switch and the control terminal of the second switch, respectively. The input terminal of the first signal generator is configured to receive a blanking signal and a first enable signal. Optionally, the first signal generator is a logic control circuit. Optionally, the control signal generation module further includes a second signal generator. The output terminal of the second signal generator is connected to the input terminal of the first signal generator and is configured to provide the blanking signal to the first signal generator. The input terminal of the second signal generator is configured to receive a second enable signal and a clock signal, and the second signal generator is configured to generate the blanking signal according to the second enable signal and the clock signal. Optionally, the second signal generator is a logic control circuit. The present disclosure further provides an embodiment of a drive control system, including a clock signal generation device, a charge pump drive circuit, at least two communication power supply devices, and a working circuit. The communication power supply devices are connected to the charge pump drive circuit and the working circuit, respectively. The charge pump drive circuit is configured to provide a drive signal to the communication power supply devices, and the communication power supply devices are configured to provide a working voltage to the working circuit based on the drive signal. The clock signal generation device is connected to the charge pump drive circuit, and the clock signal generation device is configured to provide a clock