Adapter circuit with wide power input

Abstract

The utility model belongs to the technical field of voltage stabilizing circuits, and provides a wide power input adaptation circuit which comprises a DC-DC conversion circuit. Wherein one end of the DC-DC conversion circuit is coupled with any external power supply, and the other end of the DC-DC conversion circuit is connected with the single-chip microcomputer through the voltage division circuit; the single-chip microcomputer outputs high level according to the voltage of the voltage division circuit so that the first control circuit can be switched on and the second control circuit can be switched off. Or the single chip microcomputer outputs low level according to the voltage of the voltage division circuit to cut off the first control circuit and switch on the second control circuit, so that the output is automatically adjusted according to different input voltages to adapt to different load requirements, the flexibility and adaptability of the system are improved, the circuit can accept input power sources in different voltage ranges, and the system reliability is improved. The system is suitable for various power supply environments and ensures that the connected load can obtain stable power supply.

Description

Technical Field

[0001] This application relates to the technical field of voltage stabilizing circuits, and particularly to a wide power input adaptation circuit. Background Art

[0002] Conventional power adapters are usually designed for a specific voltage range. For various accessories such as meter heads and wireless transmitters, they need to obtain power from different models and specifications of battery packs and acquire their data to achieve the purpose of display and transmission communication. However, because different batteries provide different voltages, accessories such as meter heads and wireless transmitters need to be specially made for specific models of batteries, and it is impossible to achieve the generalization, unification, and standardization of accessories. This application solves this technical problem and enables peripheral products of battery packs such as various meter heads and wireless devices to adapt to the power input of most models of battery packs, thus achieving the generalization, unification, and standardization of products. Utility Model Content

[0003] This application provides a wide power input adaptation circuit, which enables peripheral products of battery packs such as various meter heads and wireless devices to adapt to the power input of most models of battery packs, ensuring that connected devices such as meter heads and wireless devices can obtain the required stable power supply and avoiding equipment failures or unstable performance caused by unstable power supplies.

[0004] Specifically, this application provides a wide power input adaptation circuit, including:

[0005] A DC-DC conversion circuit;

[0006] One end of the DC-DC conversion circuit is coupled to any external power supply, and the other end is connected to a single-chip microcomputer through a voltage division circuit;

[0007] The single-chip microcomputer outputs a high level according to the voltage of the voltage division circuit to make the first control circuit conduct and the second control circuit cut off;

[0008] Or the single-chip microcomputer outputs a low level according to the voltage of the voltage division circuit to make the first control circuit cut off and the second control circuit conduct;

[0009] The other ends of the first control circuit and the second control circuit are both connected to a load.

[0010] The wide power input adaptation circuit described in this application can automatically adjust the output according to different input voltages to adapt to different load requirements, increasing the flexibility and adaptability of the system.

[0011] Wherein, a step-down circuit is also provided between the first control circuit and the second control circuit and the load.

[0012] As an implementation manner, the voltage division circuit further includes:

[0013] a first resistor, a second resistor and a capacitor C4; wherein,

[0014] one end of the second resistor and the capacitor C4 after being connected in parallel is grounded, and the other end is connected in series with the first resistor and connected to a microcontroller.

[0015] As an implementation manner, the first control circuit further includes:

[0016] the gate of the field effect transistor Q1 is connected to the microcontroller;

[0017] the source of the field effect transistor Q1 is connected to a first power supply;

[0018] the drain of the field effect transistor Q1 is connected to a buck circuit.

[0019] Wherein, the gate of the field effect transistor Q1 is connected to the microcontroller, and further includes:

[0020] the gate of the field effect transistor Q1 is connected to the collector of the triode Q3 after being connected in series with a resistor R17;

[0021] the emitter of the triode Q3 is grounded, and the emitter of the triode Q3 is further connected in parallel with a resistor R15; the other end of the resistor R15 is connected to a resistor R12;

[0022] the base of the triode Q3 is connected to the second output pin of the microcontroller after being connected in series with a resistor R12.

[0023] Preferably, the buck circuit adopts a DCDC buck integrated circuit.

[0024] Wherein, the second control circuit includes a field effect transistor Q2, wherein:

[0025] the gate of the field effect transistor Q2 is connected to the microcontroller;

[0026] the source of the field effect transistor Q2 is connected to a second power supply;

[0027] the drain of the field effect transistor Q2 is connected to a load.

[0028] As an implementation manner, the gate of the field effect transistor Q2 is connected to the microcontroller, and further includes:

[0029] the gate of the field effect transistor Q2 is connected to the collector of the triode Q4 after being connected in series with a resistor R18;

[0030] the emitter of the triode Q4 is grounded, and the emitter of the triode Q4 is further connected in parallel with a resistor R16; the other end of the resistor R16 is connected to a resistor R13;

[0031] The base of the triode Q4 is connected to the first output pin of the single-chip microcomputer after being serially connected with a resistor R13.

[0032] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0033] The wide power input adaptation circuit provided by this application can adapt to the voltage and current specifications of a variety of battery packs, meet the requirements of different types of battery packs. The circuit can maintain stable output voltage and current within a wide power input range, ensuring that connected devices, such as instrument heads, wireless devices, etc., can obtain the required stable power supply, avoiding equipment failures or unstable performance caused by unstable power supplies. Moreover, the wide power input adaptation circuit design takes into account high-efficiency power conversion to reduce energy loss. The high-efficiency power conversion not only improves the power usage efficiency but also reduces heat generation, which helps to extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of a wide power input adaptation circuit described in this application.

[0035] Figure 2 It is a step-down circuit diagram described in this application.

[0036] Figure 3 It is a voltage division circuit diagram described in this application.

[0037] Figure 4 It is a first control circuit and a second control circuit diagram described in this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0039] Please refer to Figure 1 , a wide power input adaptation circuit is provided for the first embodiment of this application, including:

[0040] A DC-DC conversion circuit;

[0041] One end of the DC-DC conversion circuit is coupled to any external power supply, and the other end is connected to the single-chip microcomputer through a voltage division circuit;

[0042] The single-chip microcomputer outputs a high level according to the voltage of the voltage division circuit, making the first control circuit conduct and the second control circuit cut off;

[0043] Or the single-chip microcomputer outputs a low level according to the voltage of the voltage-dividing circuit, causing the first control circuit to cut off and the second control circuit to conduct;

[0044] The other ends of the first control circuit and the second control circuit are both connected to the load.

[0045] Wherein, a step-down circuit is further arranged between the first control circuit and the second control circuit and the load.

[0046] Preferably, the step-down circuit adopts a DCDC step-down integrated circuit, which is used to convert the wide voltage range provided by the external power supply into a stable DC voltage.

[0047] In a preferred embodiment, as Figure 2 shown, the step-down circuit includes:

[0048] It is composed of an input voltage circuit, a power supply chip and an output voltage circuit;

[0049] Wherein, the input voltage circuit includes a unidirectional capacitor C5 and a capacitor C1 connected in parallel with the power supply. One end of the unidirectional capacitor C5 and the capacitor C1 after being connected in parallel is connected to the VIN pin of the power supply chip, and the other end is connected to the GND pin of the power supply chip; the output voltage circuit includes a unidirectional capacitor C2 and a capacitor C3 connected in parallel with the output port; one end of the unidirectional capacitor C2 and the capacitor C3 after being connected in parallel is connected to the VOUT pin of the power supply chip, and the other end is grounded. In this embodiment, the step-down circuit supports the conversion of any voltage such as 5V or 12V to the target voltage such as 3.3V, and is not limited thereto.

[0050] In a preferred embodiment, the single-chip microcomputer starts to work after obtaining the VCC voltage. The voltage-dividing circuit is used to obtain a voltage-dividing value and input it into the ADC input port of the single-chip microcomputer. The single-chip microcomputer uses the internal ADC module to detect the voltage-dividing value and inversely calculate the VCC voltage.

[0051] Wherein, the battery voltage formula:

[0052] Vbat = ((R1 + R2) / R1)*Vadc.

[0053] Specifically, as Figure 3 shown, the voltage-dividing circuit further includes:

[0054] A first resistor R1, a second resistor R2 and a capacitor C4; wherein,

[0055] One end of the second resistor and the capacitor C4 after being connected in parallel is grounded, and the other end is connected in series with the first resistor and connected to the single-chip microcomputer.

[0056] In a preferred embodiment, as Figure 4 shown, the first control circuit further includes: a field effect transistor Q1, wherein:

[0057] The gate of the field-effect transistor Q1 is connected to the single-chip microcomputer;

[0058] The source of the field-effect transistor Q1 is connected to the first power supply;

[0059] The drain of the field-effect transistor Q1 is connected to the buck circuit and then connected to the load.

[0060] Among them, the gate of the field-effect transistor Q1 is connected to the single-chip microcomputer, and further includes:

[0061] The gate of the field-effect transistor Q1 is connected to the collector of the triode Q3 after being serially connected with the resistor R17;

[0062] The emitter of the triode Q3 is grounded, and the emitter of the triode Q3 is also shunted with the resistor R15; the other end of the resistor R15 is connected to the resistor R12.

[0063] The base of the triode Q3 is connected to the second output pin OUT2 of the single-chip microcomputer after being serially connected with the resistor R12.

[0064] Among them, the second control circuit includes a field-effect transistor Q2, and specifically:

[0065] The gate of the field-effect transistor Q2 is connected to the single-chip microcomputer;

[0066] The source of the field-effect transistor Q2 is connected to the second power supply;

[0067] The drain of the field-effect transistor Q2 is connected to the load.

[0068] The gate of the field-effect transistor Q2 is connected to the single-chip microcomputer, and further includes:

[0069] The gate of the field-effect transistor Q2 is connected to the collector of the triode Q4 after being serially connected with the resistor R18;

[0070] The emitter of the triode Q4 is grounded, and the emitter of the triode Q4 is also shunted with the resistor R16; the other end of the resistor R16 is connected to the resistor R13;

[0071] The base of the triode Q4 is connected to the first output pin of the single-chip microcomputer after being serially connected with the resistor R13.

[0072] The wide power input adaptation circuit provided by this application can accept input power supplies within different voltage ranges and is applicable to various power environments, such as batteries and power adapters with different voltage levels, making the system more flexible in different application scenarios. Through the DC-DC conversion circuit, the input voltage is converted into a stable output voltage, ensuring that the connected load can obtain a stable power supply and improving the stability and reliability of the system. Through the voltage division circuit controlled by the single-chip microcomputer, the circuit can intelligently adjust the connection state of the load according to the input voltage, optimize the working conditions of the load, automatically switch the first control circuit and the second control circuit according to the change of the voltage, and improve the adaptability and operation flexibility of the system.

[0073] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of this application. Those of ordinary skill in the art can make various changes and modifications therein without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0074] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0075] In several embodiments provided by this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0076] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0077] Although the description of the present application is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, improvements and variations are included within the spirit and scope of the appended claims.

Claims

1. A wide power input adaptation circuit, characterized in that, Comprising: A DC-DC conversion circuit; One end of the DC-DC conversion circuit is coupled to any external power supply, and the other end is connected to a microcontroller through a voltage dividing circuit; The microcontroller outputs a high level according to the voltage of the voltage dividing circuit to turn on the first control circuit and turn off the second control circuit; Or the microcontroller outputs a low level according to the voltage of the voltage dividing circuit to turn off the first control circuit and turn on the second control circuit; The other ends of the first control circuit and the second control circuit are both connected to a load.

2. The wide power supply input adaptation circuit according to claim 1, wherein A buck circuit is further provided between the first control circuit and the second control circuit and the load.

3. The wide power supply input adaptation circuit according to claim 2, wherein, The voltage dividing circuit further includes: a first resistor, a second resistor, and a capacitor C4; wherein, One end of the second resistor and the capacitor C4 in parallel is grounded, and the other end is connected in series with the first resistor and connected to the microcontroller.

4. The wide power supply input adaptation circuit according to claim 2, characterized in that, The first control circuit includes a field effect transistor Q1, wherein: The gate of the field effect transistor Q1 is connected to the microcontroller; The source of the field effect transistor Q1 is connected to a first power supply; The drain of the field effect transistor Q1 is connected to the buck circuit.

5. The wide power supply input adaptation circuit according to claim 4, wherein, The gate of the field effect transistor Q1 is connected to the microcontroller, and further includes: The gate of the field effect transistor Q1 is connected to the collector of a triode Q3 after being connected in series with a resistor R17; The emitter of the triode Q3 is grounded, and the emitter of the triode Q3 is also connected in parallel with a resistor R15; the other end of the resistor R15 is connected to a resistor R12; The base of the triode Q3 is connected to the second output pin of the microcontroller after being connected in series with a resistor R12.

6. The wide power supply input adaptation circuit according to claim 4, wherein The buck circuit uses a DCDC buck integrated circuit.

7. The wide power supply input adaptation circuit according to claim 1, characterized in that The second control circuit includes a field effect transistor Q2, wherein: The gate of the field effect transistor Q2 is connected to the microcontroller; The source of the field effect transistor Q2 is connected to a second power supply; The drain of the field effect transistor Q2 is connected to the load.

8. A wide power supply input adaptation circuit according to claim 7, characterized in that The gate of the field effect transistor Q2 is connected to the microcontroller, and further includes: The gate of the field effect transistor Q2 is connected to the collector of a triode Q4 after being connected in series with a resistor R18; The emitter of the triode Q4 is grounded, and the emitter of the triode Q4 is also connected in parallel with a resistor R16; the other end of the resistor R16 is connected to a resistor R13; The base of the triode Q4 is connected to the first output pin of the microcontroller after being connected in series with a resistor R13.

Images