Discharging circuit and electronic equipment
By designing a discharge circuit that includes the switch module and the diode module, the problem of complexity and cost of multiple power supply discharge control in existing technologies, the control of multiple power supply at the same time, reducing the hardware costs and processors Occupation of port resources.
Patent Information
- Application Number
- CN202420882014.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-25
AI Technical Summary
In the prior art, multiple discharge circuits are needed to control multiple power discharge, resulting in high hardware costs and waste of processor port resources, and it is impossible to achieve simultaneous discharge of multiple power supplies.
Design a discharge circuit, to achieve the same discharge control of multiple power supply through a switch module and multiple parallel diode modules. Use the diode module to isolate each other. Discharge control.
Effectively reduce the cost of hardware, avoid the need to set multiple discharge circuits, realize the function of discharge multiple power supply at the same time, and save the processor port resources.
Smart Images
Figure CN222423275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electronic circuits, in particular to a discharge circuit and electronic equipment. Background Art
[0002] With the development of electronic technology, the functional modules used in electronic devices are gradually increasing. Therefore, while the power-on timing requirements of each functional module in the electronic device are gradually increasing, the discharge timing requirements of each functional module are also gradually increasing. The discharge timing has an important impact on the performance and stability of the electronic device.
[0003] During the discharge process, due to the differences in the energy storage capacitance and load of the power supplies of each functional module, the timing of the discharge process is difficult to control. The current common discharge timing is to control the time point and discharge duration of each power supply through the processor. In the prior art, it is necessary to use multiple ports of the processor to achieve discharge control of multiple power supplies, which will increase the number of discharge circuits, increase the hardware cost on the one hand, and occupy a large number of processor ports on the other hand, wasting processor resources, and the discharge circuit of the prior art cannot discharge multiple power supplies at the same time. Utility Model Content
[0004] The purpose of the utility model is to solve the technical problem that multiple discharge circuits are needed to control the discharge of multiple power supplies in the prior art, resulting in high hardware costs. The utility model provides a discharge circuit that can discharge multiple power supplies simultaneously through one discharge circuit.
[0005] In order to solve the above technical problems, the embodiment of the utility model discloses a discharge circuit, comprising:
[0006] A switch module, used to control the on and off of the discharge circuit;
[0007] A plurality of power supplies, the plurality of power supplies are connected in parallel, and the plurality of power supplies after being connected in parallel are connected in series with the switch module;
[0008] A diode module, wherein the diode module comprises a plurality of diodes connected in parallel, wherein the anode of each diode is connected in series with each power supply to isolate the plurality of power supplies from each other, and the cathodes of the plurality of diodes are connected to the same switch module to allow the current of each power supply to be unidirectionally conducted through the corresponding diode.
[0009] By adopting the above technical solution, the positive electrode of each diode is connected in series with each power supply, so the multiple power supplies are isolated from each other, that is, the power supplies will not affect each other during normal operation; the negative electrodes of multiple diodes are connected to the same switch module, so the simultaneous discharge of multiple power supplies can be controlled through one switch module, avoiding the setting of multiple discharge circuits to save hardware costs.
[0010] According to another specific embodiment of the present utility model, the embodiment of the present utility model discloses a discharge circuit, the discharge circuit includes a control module, the control module includes a first port, the first port is connected to the switch module, and can send a control signal to the switch module;
[0011] The control signal includes a high-level signal and a low-level signal, the high-level signal is used to control the switch module to be in an open state, and the low-level signal is used to control the switch module to be in a closed state; when the switch module is in an open state, the multiple power supplies are discharged simultaneously and the current is grounded through the switch module.
[0012] By adopting the above technical solution, the first port of the control module is connected to the switch module and can send a control signal to the switch module, so that multiple power supplies can be controlled to discharge simultaneously through one port without occupying other ports of the control module.
[0013] According to another specific implementation of the present invention, an implementation of the present invention discloses a discharge circuit, wherein the control module includes a processor.
[0014] By adopting the above technical solution, the hardware cost of the entire discharge circuit can be effectively reduced.
[0015] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a discharge circuit, the switch module includes a first end, a second end and a third end, the first end is connected to the cathode of the diode module, the second end is connected to the first port and can receive the control signal, and the third end is grounded.
[0016] By adopting the above technical solution, when the second end receives the control signal, the current can pass through the first end and the third end to the ground in sequence to complete the discharge process, so as to realize the automatic control of the simultaneous discharge of multiple power supplies.
[0017] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a discharge circuit, which includes a protection resistor, which is arranged in series between the diode module and the switch module, one end of the protection resistor is connected to the negative electrode of the diode module, and the other end is connected to the switch module.
[0018] By adopting the above technical solution, the protection resistor is connected in series between the diode module and the switch module, which can provide protection for the switch module and avoid damage to the switch module due to excessive current.
[0019] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a discharge circuit, wherein the switch module includes a field effect tube, the gate of the field effect tube is connected to the control module, the drain of the field effect tube is connected to the cathode of the diode module, and the source of the field effect tube is grounded;
[0020] When the gate receives the control signal, the drain and the source are turned on, the multiple power sources are discharged simultaneously and the current is connected to the ground through the source.
[0021] By adopting the above technical solution, field effect tubes are used to control the discharge of multiple power supplies simultaneously. As a voltage control device, the gate of the field effect tube basically does not take current, so its energy consumption is lower.
[0022] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a discharge circuit, wherein the switch module includes a triode, the base of the triode is connected to the control module, the collector of the triode is connected to the cathode of the diode module, and the emitter of the triode is grounded;
[0023] When the base receives the control signal, the collector and the emitter are turned on, the multiple power supplies are discharged simultaneously and the current is grounded through the emitter.
[0024] By adopting the above technical solution, the simultaneous discharge of multiple power supplies can be controlled by transistors, which can further reduce the hardware cost of the discharge circuit.
[0025] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a discharge circuit, the switch module includes a relay, the relay includes a coil, the input end of the coil is connected to the control module, and the output end of the coil is grounded;
[0026] When the relay receives the control signal, the coil is turned on to make the contact of the relay turned on, the multiple power sources are discharged at the same time and the current is grounded through the contact of the relay.
[0027] By adopting the above technical solution, the simultaneous discharge of multiple power supplies is controlled by relays. Since relays have high voltage and current carrying capacity, they can be used to realize switching operations in high-power circuits.
[0028] The embodiment of the utility model further discloses an electronic device, which at least comprises the discharge circuit in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 Schematic diagram of a discharge circuit in some embodiments is shown.
[0030] Figure 2 A module schematic diagram of a discharge circuit provided in an embodiment of the present application is shown.
[0031] Figure 3 A schematic diagram of a discharge circuit provided in an embodiment of the present application is shown.
[0032] Figure 4 A schematic diagram of a discharge circuit including a control module provided in an embodiment of the present application is shown.
[0033] Figure 5 A schematic diagram of a discharge circuit provided in an embodiment of the present application including a control module and a protection resistor is shown.
[0034] Figure 6 A schematic diagram of a discharge circuit including a MOS tube provided in an embodiment of the present application is shown.
[0035] Figure 7 A schematic diagram of a discharge circuit including a triode provided in an embodiment of the present application is shown. DETAILED DESCRIPTION
[0036] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.
[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0038] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0039] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.
[0040] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.
[0041] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.
[0042] In some embodiments, the discharge circuit includes a processor, multiple power supplies and multiple switch modules. The processor includes multiple ports. Each switch module is connected in series between each port and each power supply. Each port can send a control signal to control each corresponding switch module to turn on or off, so that each corresponding power supply discharges.
[0043] Exemplarily, the processor includes a first port 11, a second port 12 and a third port 13, the multiple power supplies include a first power supply Vcc1, a second power supply Vcc2 and a third power supply Vccn, the multiple switch modules include a first switch module 21, a second switch module 22 and a third switch module 23, the first switch module 21 is connected in series between the first port 11 and the first power supply Vcc1 to form a first discharge circuit 30, the second switch module 22 is connected in series between the second port 12 and the second power supply Vcc2 to form a second discharge circuit 40, and the third switch module 23 is connected in series between the third port 13 and the third power supply Vccn to form a third discharge circuit 50.
[0044] When the first power supply Vcc1, the second power supply Vcc2, and the third power supply Vccn need to be discharged, the processor needs to send control signals to the first power supply Vcc1, the second power supply Vcc2, and the third power supply Vccn in sequence, which will cause a certain delay; and the ports of the processor are limited. A large number of ports are used for the discharge circuit, which will cause a waste of processor port resources; in addition, the first discharge circuit 30, the second discharge circuit 40, and the third discharge circuit 50 respectively have a first switch module 21, a second switch module 22, and a third switch module 23. The use of multiple switch modules increases the use cost of hardware.
[0045] The above embodiment only includes 3 discharge circuits, but in actual production applications, it may include 4, 5, 6 or more circuits. In this case, the adverse effects on the increase in hardware cost and processor port occupancy will be more obvious. In addition, the number of processor ports has an upper limit, that is, when all the ports of the processor are occupied, no new discharge circuits can be added to discharge the power supply.
[0046] In order to solve the above problems, an embodiment of the present application provides a discharge circuit, which can be applied to an electronic device with multiple power supplies connected in parallel.
[0047] In some embodiments, see Figure 2 The present application provides a discharge circuit, including a switch module, a power module and a diode module. The control module is used to send a control signal to the switch module. When the switch module receives the control signal, it can control the conduction or closing of the discharge circuit. When the switch module controls the discharge circuit to be in the on state, the current of the power module passes through the diode module and the switch module in turn, and finally flows out to the ground to complete the discharge process.
[0048] In some embodiments, see Figure 2 , 3 The power module 10 includes multiple parallel power supplies, and the multiple parallel power supplies are connected in series with the switch module, and the switch module can control the on and off of the discharge circuit; the diode module 20 includes multiple parallel diodes, and the positive electrode of each diode is connected in series with each power supply to isolate the multiple power supplies from each other, and the negative electrodes of the multiple diodes are connected to the same switch module to allow the current of each power supply to be unidirectionally conducted through the corresponding diode.
[0049] In the discharge circuit provided in the present application, the positive electrode of each diode is connected in series with each power supply, so the multiple power supplies are isolated from each other, that is, the power supplies will not affect each other during normal operation; the negative electrodes of multiple diodes are connected to the same switch module, so the simultaneous discharge of multiple power supplies can be controlled through one switch module, avoiding the setting of multiple discharge circuits to save hardware costs.
[0050] Exemplarily, the diode module includes a diode D1, a diode D2, and a diode D3 connected in parallel, and the multiple power supplies include a first power supply Vcc1, a second power supply Vcc2, and a third power supply Vcc3 connected in parallel. The anode of the diode D1 is connected to the first power supply Vcc1, the anode of the diode D2 is connected to the second power supply Vcc2, and the anode of the diode D3 is connected to the first power supply Vcc3. The cathodes of the diodes D1, D2, and D3 are all connected to the same switch module and are grounded through the switch module. When the switch module is in an open state, the first power supply Vcc1, the second power supply Vcc2, and the third power supply Vcc3 are discharged simultaneously and the current is grounded through the switch module.
[0051] It should be noted that the discharge circuit provided in the present application can be used to discharge 3, 4, 5, 6 or other power supplies at the same time. The present application does not limit the number of power supplies and the number of diodes. As long as each diode is connected to each power supply in a one-to-one correspondence, multiple diodes can be connected only to the same switch module.
[0052] In some embodiments, the control module is used to send a control signal to the switch module, and the switch module adjusts the state of the power module discharging to the ground terminal based on the control signal. Figure 4 The control module may be a processor, the processor includes a first port 31, the first port 31 is connected to the switch module, and the processor sends a control signal to the switch module through the first port 31 to achieve the purpose of controlling multiple power supplies to discharge simultaneously through one port.
[0053] In some embodiments, the control signal can be a pulse width modulation (PWM) signal. As a periodic square wave signal, the output voltage can be controlled by changing the ratio of the high level time to the low level time of the square wave signal, thereby sending a high level signal and a low level signal to the switch module, wherein the high level signal is used to control the switch module to be in an open state, and the low level signal is used to control the switch module to be in a closed state.
[0054] In some embodiments, the processor includes a single-chip microcomputer, for example, it can be an STM32 single-chip microcomputer, a 51 single-chip microcomputer, an Arduino single-chip microcomputer, etc., and this application does not limit this. This application takes the STM32 single-chip microcomputer as an example. The IO port of the STM32 single-chip microcomputer can only output high level and low level. The duty cycle of the square wave output by the IO port is changed by pulse width modulation, thereby obtaining an analog voltage signal simulated by a digital signal, and the voltage is added to the analog load in a pulse sequence. When connected, the high level is 1, and when disconnected, the low level is 0.
[0055] In some embodiments, the switch module includes a first terminal 41, a second terminal 42 and a third terminal 43, the first terminal 41 is connected to the cathode of the diode module, the second terminal 42 is connected to the first port 31 and can receive a control signal, and the third terminal 43 is grounded. Exemplarily, when the second terminal 42 receives a high level signal, the first terminal 41 and the third terminal 43 are connected, and the current can be grounded through the switch module to achieve discharge of the power module.
[0056] In some embodiments, see Figure 5 The discharge circuit includes a protection resistor R, which is arranged in series between the diode module and the switch module. One end of the protection resistor is connected to the negative electrode of the diode module, and the other end is connected to the switch module. By connecting the protection resistor R in series between the diode module and the switch module, the switch module can be protected to avoid damage to the switch module due to excessive current.
[0057] In some embodiments, the minimum resistance of the protection resistor R is calculated by the following formula:
[0058]
[0059] Among them, U max Indicates the maximum voltage of multiple power supplies in the power module; U DF Indicates the diode voltage drop; U TF Represents the conduction voltage drop of the switch module; I FA Represents the average current of the diode.
[0060] For example, when the maximum voltage U of the multiple power supplies max When the value is 5V, the parameters of the diode can be selected as follows: average current I FA When the current through the diode is 0.5A, it can last for 1 second. The diode voltage drop U DF The value is 0.7V; the forward conduction current of the switch module is 0.2A, which is consistent with the diode, and the conduction voltage drop U TF is 0.3V.
[0061] At this time, the minimum resistance of the protection resistor R is: It should be noted that, in actual application, in order to ensure sufficient design margin, a resistor with a resistance value greater than 20Ω can usually be selected, for example, a resistor with a resistance value of 30Ω, 40Ω, 82Ω, etc. can be selected.
[0062] It can be understood that the present application does not impose any restrictions on the minimum resistance value of the protection resistor R, the maximum voltage of multiple power supplies, the parameter settings of the diode, the parameter settings of the switch module, etc., and can be set according to actual needs. It is only necessary to determine the maximum voltage of multiple power supplies, the parameter settings of the diode, and the parameter settings of the switch module, and then calculate the minimum resistance value of the protection resistor R through the above formula.
[0063] In some embodiments, see Figure 6 The switch module includes a field effect transistor, namely a metal oxide semiconductor field effect transistor (MOS transistor). The MOS transistor includes a source S (corresponding to the third end of the switch module), a gate G (corresponding to the second end of the switch module) and a drain D (corresponding to the first end of the switch module), and is divided into two categories: P-channel enhancement MOS transistor and N-channel enhancement MOS transistor.
[0064] The P-channel enhancement MOS tube can also be called a PMOS tube. The working characteristic of the PMOS tube is that when Vgs (the voltage between the gate G and the source S) is less than a certain threshold, the PMOS tube is turned on.
[0065] N-channel enhancement MOS tube can also be called NMOS tube. The working characteristic of NMOS tube is that when Vgs (the voltage between the gate G and the source S) is greater than a certain threshold, the NMOS tube is turned on.
[0066] For example, Figure 6 The switch module of the discharge circuit shown in the figure uses an N-channel MOS tube, the gate of the field effect tube is connected to the processor, the drain of the field effect tube is connected to the cathode of the diode module, and the source of the field effect tube is grounded; when the gate receives a high-level signal, the drain and the source are turned on, multiple power supplies are discharged simultaneously, and the current passes through the source to the ground.
[0067] It should be noted that the embodiment of the present application does not limit the type of the MOS tube, which can be either a PMOS tube or an NMOS tube.
[0068] In some embodiments, the switch module includes a transistor, which includes a base B (corresponding to the second end of the aforementioned switch module), a collector C (corresponding to the first end of the aforementioned switch module) and an emitter E (corresponding to the third end of the aforementioned switch module). According to different structures, it can be divided into NPN transistors and PNP transistors; according to different PN junction materials, it can be divided into germanium transistors and silicon transistors. The embodiments of the present application do not limit the specific types of transistors.
[0069] For example, Figure 7The switch module of the discharge circuit shown in the figure uses an NPN transistor, the base B of the transistor is connected to the processor, the collector C of the transistor is connected to the cathode of the diode module, and the emitter E of the transistor is grounded; when the base B receives a control signal, the collector C and the emitter E are turned on, multiple power supplies are discharged simultaneously, and the current passes through the emitter to the ground.
[0070] In some embodiments, the switching module includes a relay (not shown in the figure), the relay includes a coil, the input end of the coil is connected to the processor, and the output end of the coil is grounded; when the relay receives a control signal, the coil is turned on to make the contacts of the relay turned on, multiple power supplies are discharged simultaneously and the current is grounded through the contacts of the relay.
[0071] Relays include electromagnetic relays, temperature relays, etc., and the embodiments of the present application do not limit the specific types of relays. For example, an electromagnetic relay is generally composed of an iron core, a coil, an armature, a contact spring, etc. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating an electromagnetic effect. The armature will overcome the pulling force of the return spring under the action of electromagnetic attraction and be attracted to the iron core, thereby driving the moving contact of the armature and the static contact (normally open contact) to close. At this time, the discharge circuit is turned on, and the currents of multiple power supplies can be discharged simultaneously.
[0072] When the coil is powered off, the electromagnetic attraction disappears, and the armature returns to its original position under the reaction force of the spring, releasing the moving contact and the original static contact (normally closed contact), and the discharge circuit is disconnected.
[0073] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.
Claims
1. A discharge circuit, characterized in that: include: A switch module, used to control the on and off of the discharge circuit; A plurality of power supplies, the plurality of power supplies are connected in parallel, and the plurality of power supplies after being connected in parallel are connected in series with the switch module; A diode module, wherein the diode module comprises a plurality of diodes connected in parallel, wherein the anode of each diode is connected in series with each power supply to isolate the plurality of power supplies from each other, and the cathodes of the plurality of diodes are connected to the same switch module to allow the current of each power supply to be unidirectionally conducted through the corresponding diode.
2. The discharge circuit according to claim 1, characterized in that: The discharge circuit includes a control module, the control module includes a first port, the first port is connected to the switch module, and can send a control signal to the switch module, the control signal includes a high level signal and a low level signal, the high level signal is used to control the switch module to be in an open state, and the low level signal is used to control the switch module to be in a closed state; When the switch module is in an open state, the multiple power sources discharge simultaneously and the current is grounded through the switch module.
3. The discharge circuit according to claim 2, characterized in that: The control module includes a processor.
4. The discharge circuit according to claim 3, characterized in that: The switch module includes a first end, a second end and a third end. The first end is connected to the cathode of the diode module, the second end is connected to the first port and can receive the control signal, and the third end is grounded.
5. The discharge circuit according to any one of claims 2 to 4, characterized in that: The discharge circuit comprises a protection resistor, which is arranged in series between the diode module and the switch module, one end of the protection resistor is connected to the cathode of the diode module, and the other end is connected to the switch module.
6. The discharge circuit according to claim 5, characterized in that: The switch module comprises a field effect tube, the gate of the field effect tube is connected to the control module, the drain of the field effect tube is connected to the cathode of the diode module, and the source of the field effect tube is grounded; When the gate receives the control signal, the drain and the source are turned on, the multiple power sources are discharged simultaneously and the current is connected to the ground through the source.
7. The discharge circuit according to claim 5, characterized in that: The switch module comprises a triode, the base of the triode is connected to the control module, the collector of the triode is connected to the cathode of the diode module, and the emitter of the triode is grounded; When the base receives the control signal, the collector and the emitter are turned on, the multiple power supplies are discharged simultaneously and the current is grounded through the emitter.
8. The discharge circuit according to claim 5, characterized in that: The switch module includes a relay, the relay includes a coil, the input end of the coil is connected to the control module, and the output end of the coil is grounded; When the relay receives the control signal, the coil is turned on to make the contact of the relay turned on, the multiple power sources are discharged at the same time and the current is grounded through the contact of the relay.
9. An electronic device, characterized in that: Comprising a discharge circuit as described in any one of claims 1-8.