CN-117087568-B - Driving circuit for load, control method and device thereof and vehicle

Abstract

The invention provides a driving circuit for a load, a control method, a control device and a vehicle thereof, and relates to the technical field of electronics, wherein the driving circuit comprises a high-side driving circuit, a first power supply terminal and a second power supply terminal, wherein the high-side driving circuit is connected between the first power supply terminal and the first terminal of the load and is connected with the load through a first node; the power supply device includes a load, a high-side detection circuit connected between a first node and a ground terminal and configured to detect a voltage at the first node to output a first voltage signal, a low-side driving circuit connected between a second terminal of the load and the ground terminal and connected to the load via the second node, a low-side detection circuit connected between the second node and the ground terminal and configured to detect a voltage at the second node to output a second voltage signal, and a first diode having an anode connected to the second power terminal and a cathode connected to the first node, wherein the voltage provided by the second power terminal is smaller than the voltage provided by the first power terminal.

Inventors

• ZHANG BO
• WANG QI
• NIE BINBIN
• QIN FENGJUN
• ZHANG WEI
• Shao Guangya

Assignees

• 徐州徐工汽车制造有限公司

Dates

Publication Date

20260508

Application Date

20230821

Claims (12)

1. 1. A drive circuit for a load, comprising: The high-side driving circuit is connected between the first power supply end and first ends of the plurality of loads and is connected with the plurality of loads through a first node; a high-side detection circuit connected between the first node and the ground terminal and configured to detect a voltage at the first node to output a first voltage signal; The low-side driving circuits are connected between the second ends of the corresponding loads and the grounding end, and are connected with the corresponding loads through the corresponding second nodes; A plurality of low-side detection circuits in one-to-one correspondence with the plurality of loads, each low-side detection circuit being connected between a corresponding second node and a ground terminal and configured to detect a voltage at the corresponding second node to output a second voltage signal; A first diode having an anode connected to the second power supply terminal and a cathode connected to the first node, wherein the voltage provided by the second power supply terminal is smaller than the voltage provided by the first power supply terminal, and A pin multiplexing circuit, comprising: A first input connected to the high-side detection circuit and configured to receive a first voltage signal; A plurality of second input terminals connected to the plurality of low-side detection circuits and configured to receive a plurality of second voltage signals, and A plurality of selection signal inputs configured to receive a plurality of selection signals; the pin multiplexing circuit is configured to output a conversion signal according to the first voltage signal, the plurality of second voltage signals, and the plurality of selection signals.
2. 2. The circuit of claim 1, wherein the voltage provided by the second power supply terminal is 2 volts to 6 volts.
3. 3. The circuit of claim 1, further comprising: And the anode of the second diode is connected with the second end of the load, and the cathode of the second diode is connected with the first end of the load.
4. 4. A circuit according to any one of claims 1-3, wherein the high side detection circuit comprises: A first resistor and a second resistor connected in series between the first node and the ground terminal, and And one end of the third resistor is connected with the first resistor and the second resistor respectively, and the other end of the third resistor is used for outputting a first voltage signal.
5. 5. A circuit according to any one of claims 1-3, wherein the low side detection circuit comprises: a fourth resistor and a fifth resistor connected in series between the second end of the load and the ground, and And a sixth resistor having one end connected to the fourth resistor and the fifth resistor, respectively, and the other end for outputting a second voltage signal.
6. 6. A circuit according to any one of claims 1 to 3, wherein the low side drive circuit comprises: An input configured to receive a control signal of a low-side drive circuit; a first transistor having a first electrode grounded; A seventh resistor connected between the input terminal and the second electrode of the first transistor; an eighth resistor connected between the third power supply terminal and the third electrode of the first transistor; a ninth resistor having one end connected to the input terminal and the other end connected to the third power supply terminal, and And the second electrode is connected with a third electrode of the first transistor, and the third electrode is connected with a second end of the load.
7. 7. A control method of a drive circuit for a load according to any one of claims 1 to 6, comprising: Determining the state of the load according to the first voltage signal and the second voltage signal, and In the case where the load is in an abnormal state, at least one of the high-side drive circuit and the low-side drive circuit is controlled to be turned off.
8. 8. The method of claim 7, wherein the high-side drive circuit is a high-side power switch chip configured to output a current signal positively correlated to the load current via a current sense output pin connected to a tenth resistor to convert the current signal to a third voltage signal; wherein determining the state of the load from the first voltage signal and the second voltage signal comprises: And determining the state of the load according to the first voltage signal, the second voltage signal and the third voltage signal.
9. 9. A control device of a drive circuit for a load according to any one of claims 1 to 6, comprising: A module configured to perform the control method of claim 7 or 8.
10. 10. A control device of a drive circuit for a load according to any one of claims 1 to 6, comprising: Memory, and A processor coupled to the memory and configured to execute the control method of claim 7 or 8 based on instructions stored in the memory.
11. 11. A drive system for a load, comprising: A driving circuit for a load as claimed in any one of claims 1 to 6, and The control device of claim 9 or 10.
12. 12. A vehicle, comprising: the drive system for a load of claim 11.

Description

Driving circuit for load, control method and device thereof and vehicle Technical Field The disclosure relates to the technical field of electronics, and in particular relates to a driving circuit for a load, a control method and device thereof, and a vehicle. Background The driving mode of the load includes high side driving and low side driving. One of the driving circuits in the related art includes a high-side driving circuit and a low-side driving circuit. The driving circuit combines the high-side driving mode and the low-side driving mode to drive the load, so that the risk that the load cannot be stopped due to the damage of one driving circuit in the high-side driving circuit and the low-side driving circuit can be reduced, and the safety is improved. A detection circuit for detecting the state of the circuit is also provided in such a drive circuit, so that fault diagnosis can be realized. Disclosure of Invention However, such a driving circuit in the related art has high power consumption. By analysis, this is due to the higher power consumption of the detection circuit in some cases. In view of this, the embodiments of the present disclosure provide the following technical solutions, which can reduce the energy consumption of the driving circuit. According to an aspect of the embodiments of the present disclosure, there is provided a driving circuit for a load, including a high-side driving circuit connected between a first power supply terminal and a first terminal of the load and connected to the load via a first node, a high-side detecting circuit connected between the first node and a ground terminal and configured to detect a voltage at the first node to output a first voltage signal, a low-side driving circuit connected between a second terminal of the load and the ground terminal and connected to the load via a second node, a low-side detecting circuit connected between the second node and the ground terminal and configured to detect a voltage at the second node to output a second voltage signal, and a first diode having an anode connected to the second power supply terminal and a cathode connected to the first node, wherein the voltage provided by the second power supply terminal is smaller than the voltage provided by the first power supply terminal. In some embodiments, the voltage provided by the second power terminal is 2 volts to 6 volts. In some embodiments, the circuit further comprises a second diode having a positive electrode connected to the second end of the load and a negative electrode connected to the first end of the load. In some embodiments, the high-side driving circuit is connected between a first power supply terminal and a first terminal of a plurality of loads and is connected with the plurality of loads via a first node, the driving circuit includes a plurality of low-side driving circuits in one-to-one correspondence with the plurality of loads, each low-side driving circuit being connected between a second terminal of a corresponding load and a ground terminal and being connected with the corresponding load via a corresponding second node, and a plurality of low-side detecting circuits in one-to-one correspondence with the plurality of loads, each low-side detecting circuit being connected between the corresponding second node and the ground terminal and being configured to detect a voltage at the corresponding second node to output a second voltage signal. In some embodiments, the circuit further comprises a pin multiplexing circuit comprising a first input connected to the high-side detection circuit and configured to receive a first voltage signal, a plurality of second inputs connected to the plurality of low-side detection circuits and configured to receive a plurality of second voltage signals, and a plurality of select signal inputs configured to receive a plurality of select signals, wherein the pin multiplexing circuit is configured to output a transition signal based on the first voltage signal, the plurality of second voltage signals, and the plurality of select signals. In some embodiments, the high-side detection circuit comprises a first resistor and a second resistor connected in series between the first node and the ground, and a third resistor, one end of which is connected with the first resistor and the second resistor respectively, and the other end of which is used for outputting a first voltage signal. In some embodiments, the low-side detection circuit includes fourth and fifth resistors connected in series between the second end of the load and ground, and a sixth resistor having one end connected to the fourth and fifth resistors, respectively, and another end for outputting a second voltage signal. In some embodiments, the low-side drive circuit includes an input configured to receive a control signal of the low-side drive circuit, a first transistor having a first electrode coupled to ground, a seventh resistor coupled between the inpu