Control circuit applicable to power source and capable of freely switching voltage

Abstract

A control circuit capable of freely switching a power source voltage. The control circuit comprises a first control circuit used for freely switching a power source voltage, and a second control circuit and a third control circuit which are electrically connected to the first control circuit, wherein the first control circuit is provided with a toggle switch, the second control circuit is a charging circuit, and the third control circuit is a protection circuit. By means of the toggle switch, a user can select a required output voltage to implement fast and efficient voltage conversion, so as to meet the requirements of different devices for voltages. Moreover, by means of precise battery management, it is ensured that a battery operates under safe and efficient conditions, thereby prolonging the service life of the battery.

Description

A control circuit suitable for power supplies with freely switchable voltage. Technical Field

[0001] This invention belongs to the technical field of power supply voltage output control circuits, specifically relating to a control circuit suitable for power supplies with freely switchable voltages. Background Technology

[0002] Currently, batteries cannot switch between different power supply voltages during use, nor can they perform battery voltage conversion and protection functions. In other words, existing batteries cannot achieve dual-voltage output.

[0003] Furthermore, existing batteries suffer from several shortcomings. These include: how to efficiently achieve voltage conversion between two voltage levels to reduce energy loss and improve battery efficiency; how battery management can accurately monitor the battery's charging and discharging status and implement overcharge / over-discharge protection to extend battery life and safety; and how to implement a user-friendly voltage switching mechanism that allows users to easily select the required voltage output. Technical issues

[0004] Therefore, in view of the above-mentioned technical problems and defects, such as the inability to switch power supply voltages to output different voltages, the inability to realize battery voltage conversion and protection functions, and the aforementioned drawbacks of existing batteries, there is an urgent need to design and develop a control circuit that is suitable for power supplies and allows for free voltage switching. Technical solutions

[0005] The purpose of this invention is to provide a control circuit that is suitable for power supplies and whose voltage can be freely switched.

[0006] The objective of this invention is achieved as follows: the control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein, the second control circuit is a charging circuit; and the third control circuit is a protection circuit.

[0007] The first control circuit is equipped with a toggle switch for controlling the real-time switching of the power supply voltage output; the third pin of the toggle switch is connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit respectively; the other end of the ninth resistor is connected to the output terminal and the other end of the first transistor respectively; the third end of the first transistor is connected to the output terminal and the third end of the second transistor respectively.

[0008] The first pin of the toggle switch is connected to one end of the tenth resistor and one end of the second transistor, respectively, and the other end of the tenth resistor is connected to the input terminal and the other end of the second transistor, respectively.

[0009] Furthermore, both the first transistor and the second transistor are of model number XGC15P16AL.

[0010] Furthermore, the second control circuit includes a first control chip;

[0011] The first pin of the first control chip is connected to one end of the fifth resistor; the other end of the fifth resistor is grounded; the second pin of the first control chip is connected to the cathode of the first light-emitting diode; the anode of the first light-emitting diode is connected to the input terminal.

[0012] The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together.

[0013] The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is connected to the output terminal, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded.

[0014] The seventh pin of the first control chip is connected to the input terminal and one end of the first capacitor, respectively; the other end of the second capacitor is grounded.

[0015] Furthermore, the model number of the first control chip is XGC3F01.

[0016] Furthermore, a fourth control chip is provided in the third control circuit;

[0017] The first pin of the fourth control chip is connected to the second pin of the fourth control chip and one end of the sixth capacitor, respectively; the other end of the sixth capacitor is connected to the third pin of the fourth control chip and one end of the fourteenth resistor, respectively.

[0018] The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip, and the sixth pin of the fourth control chip are all grounded.

[0019] Furthermore, the fourth control chip is model XGC3F08B.

[0020] Furthermore, the control circuit also includes an interface unit;

[0021] The third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit, and the sixth pin of the interface unit are all grounded.

[0022] Furthermore, the interface unit is model TYPEC6P-LT1. Beneficial effects

[0023] This invention provides a control circuit suitable for power supplies and with freely switchable voltages. The control circuit includes a first control circuit for freely switching the power supply voltage, and a second and third control circuits electrically connected to the first control circuit. The second control circuit is a charging circuit; the third control circuit is a protection circuit. The first control circuit includes a toggle switch for controlling real-time switching of the power supply voltage output. The third pin of the toggle switch is connected to one end of a ninth resistor, one end of a first transistor, and the second control circuit. The other end of the ninth resistor is connected to the output terminal and the other end of the first transistor. The third end of the first transistor is connected to the output terminal and the third end of the second transistor. The first pin of the toggle switch is connected to one end of a tenth resistor and one end of a second transistor. The other end of the tenth resistor is connected to the input terminal and the other end of the second transistor. This allows for switchable output of different power supply voltages and provides battery voltage conversion and protection functions.

[0024] In other words, this invention enables rapid and efficient voltage conversion between power supply voltages to meet the voltage requirements of different devices. Regarding battery management optimization: precise battery management ensures that the battery operates under safe and efficient conditions, extending its lifespan. In terms of user-friendliness: a simple and easy-to-use voltage switching mechanism allows users to easily select the required voltage output. Furthermore, in terms of environmental protection and energy conservation: by using rechargeable lithium batteries to replace traditional dry-cell batteries, pollution from discarded batteries is reduced, while energy conservation and reuse are achieved. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the principle framework of a control circuit that is applicable to power supplies and whose voltage can be freely switched according to the present invention.

[0027] Figure 2 is a schematic diagram of the first control circuit according to an embodiment of the present invention, which is applicable to power supplies and has freely switchable voltage.

[0028] Figure 3 is a schematic diagram of the second control circuit of an embodiment of the present invention, which is applicable to power supplies and has freely switchable voltage.

[0029] Figure 4 is a schematic diagram of the third control circuit of an embodiment of the present invention, which is applicable to power supplies and has freely switchable voltage.

[0030] Figure 5 is a schematic diagram of the interface unit circuit of an embodiment of the control circuit of the present invention, which is applicable to power supplies and whose voltage can be freely switched.

[0031] In the diagram: R1 - first resistor; R3 - third resistor; R5 - fifth resistor; R9 - ninth resistor; R10 - tenth resistor; R14 - fourteenth resistor; R12 - twelfth resistor; Q1 - first transistor; Q2 - second transistor; U1 - first control chip; D1 - first light-emitting diode; R6 - sixth resistor; L1 - first inductor; C2 - second capacitor; C1 - first capacitor; U4 - fourth control chip; C6 - sixth capacitor. The best embodiment of the present invention

[0032] As shown in Figures 1-5, the present invention provides a control circuit suitable for power supplies with freely switchable voltage. The control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein, the second control circuit is a charging circuit; and the third control circuit is a protection circuit.

[0033] The first control circuit is equipped with a toggle switch for controlling the real-time switching of the power supply voltage; the third pin of the toggle switch is connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit respectively; the other end of the ninth resistor is connected to the output terminal and the other end of the first transistor respectively; the third end of the first transistor is connected to the output terminal and the third end of the second transistor respectively.

[0034] The first pin of the toggle switch is connected to one end of the tenth resistor and one end of the second transistor, respectively. The other end of the tenth resistor is connected to the input terminal and the other end of the second transistor, respectively. Both the first and second transistors are model XGC15P16AL. In other words, in a specific embodiment of the present invention, the first control circuit is provided with a toggle switch for controlling the real-time switching of the power supply voltage output (1.5V / 3.7V); the third pin of the toggle switch is connected to the ninth resistor and one end of the transistor (XGC15P16AL); the other end of the ninth resistor is connected to the sixth and eighth pins of the chip (XGC3F01) and one end of the transistor (XGC15P16AL); the first control discharge terminal (P+) is connected to the output terminals of the sixth and eighth pins of the chip (XGC3F01) through one end of the transistor (XGC15P16AL); the first pin of the toggle switch is connected to the tenth resistor and one end of the transistor (XGC15P16AL); the other end of the tenth resistor is connected to the B+ output terminal; the first control discharge terminal (P+) is connected to the B+ output terminal through one end of the transistor (XGC15P16AL). Embodiments of the present invention

[0035] The second control circuit includes a first control chip; the first pin of the first control chip is connected to one end of a fifth resistor; the other end of the fifth resistor is grounded; the second pin of the first control chip is connected to the cathode of a first light-emitting diode; the anode of the first light-emitting diode is connected to the input terminal.

[0036] The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together.

[0037] The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is connected to the output terminal, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded.

[0038] The seventh pin of the first control chip is connected to the input terminal and one end of the first capacitor, respectively; the other end of the second capacitor is grounded. The model of the first control chip is XGC3F01.

[0039] The third control circuit includes a fourth control chip; the first pin of the fourth control chip is connected to the second pin of the fourth control chip and one end of the sixth capacitor; the other end of the sixth capacitor is connected to the third pin of the fourth control chip and one end of the fourteenth resistor.

[0040] The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip, and the sixth pin of the fourth control chip are all grounded. The fourth control chip is model XGC3F08B.

[0041] Preferably, the control circuit, which is suitable for power supplies and allows for free voltage switching, further includes an interface unit; the third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit, and the sixth pin of the interface unit are all grounded. The interface unit is model TYPEC6P-LT1.

[0042] Specifically, in the embodiment of the present invention, the battery protection board has a toggle switch with two positions. When the toggle switch is in the 1.5V position, the positive and negative terminals of the battery output voltage is 1.5V (simulating the voltage output of a dry cell battery). When the toggle switch is in the 3.7V position, the positive and negative terminals of the battery output voltage is the standard 3.7V lithium battery voltage, which is completely consistent with the function of a single-cell lithium battery protection board.

[0043] Preferably, in the boost / buck circuit of the present invention: to achieve free switching between 1.5V and 3.7V, the circuit needs to include a boost circuit (to boost 1.5V to 3.7V) and a buck circuit (to reduce 3.7V to 1.5V). These circuits may consist of inductors, capacitors, diodes, switching transistors (such as MOSFETs), and control chips, etc.

[0044] Corresponding battery management chips are used to monitor the charging and discharging status of the battery, as well as to realize battery voltage conversion and protection functions. These chips may have functions such as battery voltage detection, charging current control, discharging current limiting, and overcharge / over-discharge protection.

[0045] Dual voltage output design: The battery itself may employ a dual voltage design, meaning it contains two voltage output terminals internally: one at 1.5V and the other at 3.7V. Users can select the desired voltage output via external circuitry or a switch.

[0046] Furthermore, the present invention employs a hidden metal plate design: in some battery designs, a hidden metal plate design may be used to achieve dual voltage output. This design allows the battery to use a 1.5V voltage output during discharge, while charging is performed using an internal 3.7V voltage.

[0047] In principle, when a 1.5V voltage output is required, the battery management chip or external circuit will step down the 3.7V lithium battery voltage to 1.5V; when a 3.7V voltage output is required, it may be powered directly through the 3.7V voltage output terminal inside the battery, or the 1.5V voltage may be boosted to 3.7V through a boost circuit (although this is less common, because lithium batteries can usually provide 3.7V voltage on their own).

[0048] For example, in wireless mouse modification applications, some users have converted their wireless mice, which originally used 1.5V dry cell batteries, to use 3.7V lithium batteries. By using a step-down chip to achieve voltage conversion, they have improved the mouse's battery life and stability. The modified mouse can maintain a stable connection for longer periods and no longer experiences frequent disconnections. Remote control upgrades: Similar to wireless mice, some remote controls can also be modified to freely switch between 1.5V and 3.7V voltages. This not only increases the remote control's range and response speed but also significantly extends its usage time and reduces the frequency of battery replacements.

[0049] In summary, the 1.5V and 3.7V freely switchable battery solution solves technical problems such as voltage conversion efficiency, battery management, and voltage switching mechanism by adopting boost / buck circuits, battery management chips, and dual voltage output design. It achieves technical effects such as high-efficiency voltage conversion, optimized battery management, user-friendliness, and environmental protection and energy saving.

[0050] In other words, this invention provides a control circuit suitable for power supplies and with freely switchable voltages. The control circuit includes a first control circuit for freely switching the power supply voltage, and a second and third control circuit electrically connected to the first control circuit. The second control circuit is a charging circuit; the third control circuit is a protection circuit. The first control circuit includes a toggle switch for controlling real-time switching of the power supply voltage. The third pin of the toggle switch is connected to one end of a ninth resistor, one end of a first transistor, and the second control circuit, respectively. The other end of the ninth resistor is connected to the output terminal and the other end of the first transistor, respectively. The third end of the first transistor is connected to the output terminal and the third end of the second transistor, respectively. The first pin of the toggle switch is connected to one end of a tenth resistor and one end of a second transistor, respectively. The other end of the tenth resistor is connected to the input terminal and the other end of the second transistor, respectively. This allows for switchable output of different power supply voltages and provides battery voltage conversion and protection functions. Industrial applicability

[0051] This invention enables rapid and efficient voltage conversion between power supply voltages to meet the voltage requirements of different devices. Regarding battery management optimization: precise battery management ensures safe and efficient battery operation, extending battery life. In terms of user-friendliness: a simple and easy-to-use voltage switching mechanism allows users to easily select the required voltage output. Furthermore, in terms of environmental protection and energy conservation: by using rechargeable lithium batteries instead of traditional dry-cell batteries, pollution from discarded batteries is reduced, while energy conservation and reuse are achieved.

Claims

1. A control circuit suitable for power supplies with freely switchable voltage, characterized in that, The control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein, the second control circuit is a charging circuit; and the third control circuit is a protection circuit. The first control circuit is equipped with a toggle switch for controlling the real-time switching of the power supply voltage output; the third pin of the toggle switch is connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit respectively; the other end of the ninth resistor is connected to the output terminal and the other end of the first X respectively; the third end of the first transistor is connected to the output terminal and the third end of the second transistor respectively. The first pin of the toggle switch is connected to one end of the tenth resistor and one end of the second transistor, respectively, and the other end of the tenth resistor is connected to the input terminal and the other end of the second transistor, respectively.

2. The control circuit according to claim 1, suitable for power supplies and with freely switchable voltage, is characterized in that, Both the first transistor and the second transistor are of model number XGC15P16AL.

3. A control circuit suitable for power supplies and with freely switchable voltage according to claim 1, characterized in that, The second control circuit includes a first control chip; The first pin of the first control chip is connected to one end of the fifth resistor; the other end of the fifth resistor is grounded; the second pin of the first control chip is connected to the cathode of the first light-emitting diode; the anode of the first light-emitting diode is connected to the input terminal. The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together. The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is connected to the output terminal, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded. The seventh pin of the first control chip is connected to the input terminal and one end of the first capacitor, respectively; the other end of the second capacitor is grounded.

4. A control circuit suitable for power supplies and with freely switchable voltage according to claim 3, characterized in that, The first control chip is model XGC3F01.

5. A control circuit suitable for power supplies and with freely switchable voltage according to claim 1, characterized in that, The third control circuit is equipped with a fourth control chip; The first pin of the fourth control chip is connected to the second pin of the fourth control chip and one end of the sixth capacitor, respectively; the other end of the sixth capacitor is connected to the third pin of the fourth control chip and one end of the fourteenth resistor, respectively. The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip, and the sixth pin of the fourth control chip are all grounded.

6. A control circuit suitable for power supplies and with freely switchable voltage according to claim 5, characterized in that, The fourth control chip is model XGC3F08B.

7. A control circuit suitable for power supplies and with freely switchable voltage according to claim 1, characterized in that, The control circuit also includes an interface unit; The third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit, and the sixth pin of the interface unit are all grounded.

8. A control circuit suitable for power supplies and with freely switchable voltage according to claim 7, characterized in that, The interface unit is model TYPEC6P-LT1.

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