A self-protected high-side driving device, liquid cooling device and vehicle

Abstract

The application relates to a self-protection high-side driving device, a liquid cooling device and a vehicle, wherein the self-protection high-side driving device comprises a control chip for outputting a control signal; a switch control circuit connected with the control chip and used for controlling the on-off of the switch control circuit according to the control signal; a high-side driving circuit connected with the switch control circuit and a load and used for outputting a driving signal to the load according to the on-off of the switch control circuit; and a ground short-circuit protection circuit connected with a first power port and the high-side driving circuit and used for controlling the high-side driving circuit to be disconnected when the driving signal on the load side is grounded. The application can effectively solve the short-circuit ground abnormality in the working process, thereby improving the use safety.

Description

Technical Field

[0001] This application relates to the field of electronic circuits, and in particular to a high-side drive device with self-protection, a liquid cooling device, and a vehicle. Background Technology

[0002] With the rapid development of technologies such as automobiles, cloud computing, big data, and artificial intelligence, traditional air cooling methods often struggle to meet the heat dissipation requirements of high-power-density applications. To address this issue, liquid cooling technology has emerged as a highly efficient heat dissipation solution.

[0003] Liquid cooling technology uses liquids (such as water or silicone oil) as a cooling medium to more effectively transfer the generated heat to the external heat dissipation system. Compared with traditional air cooling methods, liquid cooling technology has higher cooling efficiency.

[0004] In liquid cooling systems, the water pump plays a crucial role. The water pump drives the circulation of coolant, transferring the generated heat to the external heat dissipation system. Existing liquid cooling devices include... Figure 1 As shown, the system includes a control chip (MCU), a high-side driver chip (HSD), and a water pump. The MCU outputs control signals to the HSD, and the HSD outputs drive signals to the water pump. Considering various abnormal operating conditions that may occur in practical applications, the HSD cannot effectively protect against short-grounding faults that may occur during operation. Utility Model Content

[0005] Therefore, it is necessary to provide a high-side drive device, a liquid cooling device, and a vehicle with built-in protection to address the aforementioned technical problems.

[0006] In a first aspect, this utility model provides a high-side drive device with built-in protection, comprising:

[0007] The control chip is used to output control signals;

[0008] A switch control circuit, connected to the control chip, is used to control its on / off state according to the control signal;

[0009] A high-side drive circuit, connected to the switch control circuit and the load, is used to output a drive signal to the load according to the on / off state of the switch control circuit;

[0010] A ground short-circuit protection circuit, connected to the first power supply port and the high-side drive circuit, is used to control the high-side drive circuit to disconnect when the drive signal on the load side is grounded.

[0011] In some embodiments, the control signal is a PWM pulse signal.

[0012] In some embodiments, the switch control circuit includes a MOSFET Q3 and a resistor R4. The gate of the MOSFET Q3 is connected to the control chip, the source is connected to the common ground, and the drain is connected to the high-side drive circuit. The resistor R4 is connected between the gate and the source of the MOSFET Q3.

[0013] In some embodiments, the switch control circuit further includes a resistor R5, one end of which is connected to the control chip and the other end of which is connected to the base of the MOSFET Q3.

[0014] In some embodiments, the high-side driving circuit includes a MOSFET Q1 and a resistor R2. The gate of the MOSFET Q1 is connected to the switch control circuit, the drain is connected to the load, and the source is connected to the ground short-circuit protection circuit. The resistor R2 is connected between the source and the gate of the MOSFET Q1.

[0015] In some embodiments, the high-side drive circuit further includes a resistor R3, one end of which is connected to the gate of the MOS transistor Q1, and the other end is connected to the switch control circuit.

[0016] In some embodiments, the ground short-circuit protection circuit includes a transistor Q2 and a resistor R1. The emitter of the transistor Q2 is connected to the first power supply port, the collector is connected to the base of the MOSFET Q1, the base is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first power supply port.

[0017] In some embodiments, the load is a water pump.

[0018] Secondly, embodiments of this application also provide a liquid cooling device, including a water pump and a high-side drive device with built-in protection as described in the first aspect, wherein the water pump is connected to a common ground and the high-side drive device with built-in protection.

[0019] The high-side drive device with built-in protection includes:

[0020] The control chip is used to output control signals;

[0021] A switch control circuit, connected to the control chip, is used to control its on / off state according to the control signal;

[0022] A high-side drive circuit, connected to the switch control circuit and the water pump, is used to output a drive signal to the water pump according to the on / off state of the switch control circuit;

[0023] A grounding short-circuit protection circuit, connected to the first power supply port and the high-side drive circuit, is used to control the high-side drive circuit to disconnect when the drive signal on the water pump side is grounded.

[0024] In some embodiments, the control signal is a PWM pulse signal.

[0025] In some embodiments, the switch control circuit includes a MOSFET Q3 and a resistor R4. The gate of the MOSFET Q3 is connected to the control chip, the source is connected to the common ground, and the drain is connected to the high-side drive circuit. The resistor R4 is connected between the gate and the source of the MOSFET Q3.

[0026] In some embodiments, the switch control circuit further includes a resistor R5, one end of which is connected to the control chip and the other end of which is connected to the base of the MOSFET Q3.

[0027] In some embodiments, the high-side driving circuit includes a MOSFET Q1 and a resistor R2. The gate of the MOSFET Q1 is connected to the switch control circuit, the drain is connected to the water pump, and the source is connected to the ground short-circuit protection circuit. The resistor R2 is connected between the source and the gate of the MOSFET Q1.

[0028] In some embodiments, the high-side drive circuit further includes a resistor R3, one end of which is connected to the gate of the MOS transistor Q1, and the other end is connected to the switch control circuit.

[0029] In some embodiments, the ground short-circuit protection circuit includes a transistor Q2 and a resistor R1. The emitter of the transistor Q2 is connected to the first power supply port, the collector is connected to the base of the MOSFET Q1, the base is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first power supply port.

[0030] Thirdly, embodiments of this application also provide a vehicle including the liquid cooling device as described in the second aspect.

[0031] This utility model provides a high-side drive device, liquid cooling device, and vehicle with built-in protection. A control chip outputs a control signal, which is then controlled by a switch control circuit to open and close based on the control signal. The high-side drive circuit outputs a drive signal to the load based on the opening and closing of the switch control circuit. A ground fault protection circuit disconnects the high-side drive circuit when the drive signal on the load side is grounded. This application effectively solves the problem of short grounding wire abnormalities during operation, thereby improving safety.

[0032] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a structural block diagram of a liquid cooling device in the prior art;

[0035] Figure 2 This is a structural block diagram of a high-side drive device with built-in protection in one embodiment;

[0036] Figure 3 This is a circuit schematic of a high-side drive device with built-in protection in an example embodiment;

[0037] Figure 4 This is a structural block diagram of the liquid cooling device in one embodiment.

[0038] Among them, 100 is the control chip; 200 is the switch control circuit; 300 is the high-side drive circuit; 400 is the grounding short-circuit protection circuit; and 500 is the load. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0040] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0041] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. When an element is referred to as being "located" on another element, it may be directly disposed on the other element or may have an intervening element. When an element is considered to be "disposed on" another element, it may be directly disposed on the other element or may have an intervening element present. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or may have an intervening element present. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order of objects. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Please see Figure 2 This utility model provides a high-side drive device with built-in protection, comprising: a control chip 100 for outputting control signals; a switch control circuit 200 connected to the control chip 100 for controlling its on / off state according to the control signals; a high-side drive circuit 300 connected to the switch control circuit 200 and a load 500 for outputting drive signals to the load 500 according to the on / off state of the switch control circuit 200; and a ground short-circuit protection circuit 400 connected to a first power port and the high-side drive circuit 300 for controlling the high-side drive circuit 300 to disconnect when the drive signal on the load 500 side is grounded.

[0043] In some embodiments, the control signal is a PWM pulse signal.

[0044] In some embodiments, the load 500 is a water pump. In different application scenarios, the load 500 can be different devices, and this application does not limit it.

[0045] In this embodiment, a control signal is output by the control chip 100, and the switch control circuit 200 controls its on / off state according to the control signal. The high-side drive circuit 300 outputs a drive signal to the load 500 according to the on / off state of the switch control circuit 200. When the drive signal on the load 500 side is grounded, the ground short-circuit protection circuit 400 controls the high-side drive circuit 300 to disconnect. This application can effectively solve the problem of short grounding wire abnormalities that occur during operation, thereby improving the safety of use.

[0046] Furthermore, the high-side drive chip HSD used in the prior art is relatively expensive, while the high-side drive circuit 300 built with electrical components in this embodiment is relatively inexpensive.

[0047] Figure 3 This is a circuit diagram of a high-side drive device with built-in protection in an example embodiment of this application. The following is in conjunction with... Figure 3 This application provides a detailed description of each circuit component and its operating principle.

[0048] The control chip 100 is, for example, a microcontroller (MCU), connected to the second power supply port VCC and the common ground GND. The second power supply port VCC is used to power the control chip 100.

[0049] The switch control circuit 200 includes a MOSFET Q3, a resistor R4, and a resistor R5. The gate of the MOSFET Q3 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the control chip 100, the source is connected to the common ground GND, and the drain is connected to the high-side drive circuit 300. The resistor R4 is connected between the gate and the source of the MOSFET Q3.

[0050] Among them, resistor R5 is used for current limiting protection. In some embodiments, resistor R5 can be omitted, and in this case, the gate of MOSFET Q3 is directly connected to control chip 100.

[0051] The high-side drive circuit 300 includes a MOSFET Q1, a resistor R2, and a resistor R3. The gate of the MOSFET Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the switch control circuit 200, the drain is connected to the load 500, and the source is connected to the ground short-circuit protection circuit. The resistor R2 is connected between the source and the gate of the MOSFET Q1.

[0052] Among them, resistor R3 is used for current limiting protection. In some embodiments, resistor R3 can be omitted, and in this case, the gate of MOSFET Q1 is directly connected to the switch control circuit 200.

[0053] The grounding short-circuit protection circuit 400 includes a transistor Q2 and a resistor R1. The emitter of the transistor Q2 is connected to the first power supply port VDD, the collector is connected to the base of the MOSFET Q1, the base is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first power supply port VDD.

[0054] In this configuration, MOSFET Q1 is a high-side drive switch, selected as a PMOS transistor, and resistor R2 is a pull-up resistor. MOSFET Q3 is a drive switch, selected as an NMOS transistor, and resistor R4 is a pull-down resistor. Transistor Q2 is a protection transistor, selected as a PNP transistor, and resistor R1 is a current-limiting resistor.

[0055] During normal operation, control chip 100 controls the switching of MOSFET Q3 via the control signal DO_MCU_PUMP. When MOSFET Q3 is on, MOSFET Q1 is also on, and the source of MOSFET Q1 outputs the drive signal DO_PUMP_EXT to the high-impedance load 500. When MOSFET Q3 is off, MOSFET Q1 is also off. Diode Q2 remains off because the resistance of resistor R1 is much smaller than the impedance of the load 500.

[0056] When MOSFETs Q3 and Q1 are in the ON state, if the common ground GND is shorted on the 500 side of the load, and the drive signal DO_PUMP_EXT on the 500 side is grounded, the voltage of the drive signal DO_PUMP_EXT is pulled down to the common ground GND. At this time, the voltage across resistor R1 gradually increases, causing transistor Q2 to gradually turn on. After transistor Q2 turns on, resistor R2 is short-circuited, thereby turning off MOSFET Q1 and achieving short-circuit protection for MOSFET Q1.

[0057] In one embodiment, this application also provides a liquid cooling device, such as... Figure 4 As shown, it includes a water pump and a high-side drive device with built-in protection as described in the above embodiment, wherein the water pump is connected to a common ground and the high-side drive device with built-in protection.

[0058] The liquid cooling device in this embodiment includes the high-side drive device with built-in protection described in the previous embodiments, thus solving the same technical problem and achieving the same technical effect. The specific technical solution and principle of the high-side drive device with built-in protection will not be elaborated further.

[0059] The self-protected high-side drive device includes:

[0060] The control chip is used to output control signals;

[0061] A switch control circuit, connected to the control chip, is used to control its on / off state according to the control signal;

[0062] A high-side drive circuit, connected to the switch control circuit and the water pump, is used to output a drive signal to the water pump according to the on / off state of the switch control circuit;

[0063] A grounding short-circuit protection circuit, connected to the first power supply port and the high-side drive circuit, is used to control the high-side drive circuit to disconnect when the drive signal on the water pump side is grounded.

[0064] In some embodiments, the control signal is a PWM pulse signal.

[0065] In some embodiments, the switch control circuit includes a MOSFET Q3 and a resistor R4. The gate of the MOSFET Q3 is connected to the control chip, the source is connected to the common ground, and the drain is connected to the high-side drive circuit. The resistor R4 is connected between the gate and the source of the MOSFET Q3.

[0066] In some embodiments, the switch control circuit further includes a resistor R5, one end of which is connected to the control chip and the other end of which is connected to the base of the MOSFET Q3.

[0067] In some embodiments, the high-side driving circuit includes a MOSFET Q1 and a resistor R2. The gate of the MOSFET Q1 is connected to the switch control circuit, the drain is connected to the water pump, and the source is connected to the ground short-circuit protection circuit. The resistor R2 is connected between the source and the gate of the MOSFET Q1.

[0068] In some embodiments, the high-side drive circuit further includes a resistor R3, one end of which is connected to the gate of the MOS transistor Q1, and the other end is connected to the switch control circuit.

[0069] In some embodiments, the ground short-circuit protection circuit includes a transistor Q2 and a resistor R1. The emitter of the transistor Q2 is connected to the first power supply port, the collector is connected to the base of the MOSFET Q1, the base is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first power supply port.

[0070] In one embodiment, this application also provides a vehicle including a liquid cooling device as described in any of the preceding claims.

[0071] The vehicle in this embodiment includes the liquid cooling device described in the previous embodiments, thus solving the same technical problem and achieving the same technical effect. The specific technical solution and principle of the liquid cooling device will not be elaborated further.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-side drive device with built-in protection, characterized in that, include: The control chip is used to output control signals; A switch control circuit, connected to the control chip, is used to control its on / off state according to the control signal; A high-side drive circuit, connected to the switch control circuit and the load, is used to output a drive signal to the load according to the on / off state of the switch control circuit; A ground short-circuit protection circuit, connected to the first power supply port and the high-side drive circuit, is used to control the high-side drive circuit to disconnect when the drive signal on the load side is grounded.

2. The high-side drive device with built-in protection according to claim 1, characterized in that, The control signal is a PWM pulse signal.

3. The high-side drive device with built-in protection according to claim 1, characterized in that, The switching control circuit includes a MOSFET Q3 and a resistor R4. The gate of the MOSFET Q3 is connected to the control chip, the source is connected to the common ground, and the drain is connected to the high-side drive circuit. The resistor R4 is connected between the gate and the source of the MOSFET Q3.

4. The high-side drive device with built-in protection according to claim 3, characterized in that, The switch control circuit also includes a resistor R5, one end of which is connected to the control chip and the other end is connected to the base of the MOSFET Q3.

5. The high-side drive device with built-in protection according to claim 1, characterized in that, The high-side driving circuit includes a MOSFET Q1 and a resistor R2. The gate of the MOSFET Q1 is connected to the switch control circuit, the drain is connected to the load, and the source is connected to the ground short-circuit protection circuit. The resistor R2 is connected between the source and the gate of the MOSFET Q1.

6. The high-side drive device with built-in protection according to claim 5, characterized in that, The high-side drive circuit also includes a resistor R3, one end of which is connected to the gate of the MOS transistor Q1, and the other end is connected to the switch control circuit.

7. The high-side drive device with built-in protection according to claim 5, characterized in that, The grounding short-circuit protection circuit includes a transistor Q2 and a resistor R1. The emitter of the transistor Q2 is connected to the first power supply port, the collector is connected to the base of the MOSFET Q1, the base is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first power supply port.

8. The high-side drive device with built-in protection according to claim 1, characterized in that, The load is a water pump.

9. A liquid cooling device, characterized in that, Includes a water pump and a self-protected high-side drive as described in any one of claims 1-8, wherein the water pump is connected to a common ground and the self-protected high-side drive.

10. A vehicle, characterized in that, Includes the liquid cooling device as described in claim 9.

Images