Control Circuit and Electronic Device

Abstract

The present application provides a control circuit and an electronic device. The control circuit includes a fast charging circuit switch module and a light-emitting element. The input end of the fast charging circuit is electrically connected to a charging interface, the output end of the fast charging circuit is electrically connected to the first end of a battery, and the second end of the battery is grounded. The first end of the switch module is electrically connected to the first end of the battery, the second end of the switch module is electrically connected to the first end of the light-emitting element, and the second end of the light-emitting element is grounded. Wherein, when the switch module is in a preset state, the battery is electrically connected to the light-emitting element. In the embodiment of the present application, when the fast charging circuit is used to quickly charge the battery and the switch module is in the preset state, the battery is electrically connected to the light-emitting element, thereby turning on the light-emitting element to provide illumination brightness. In this way, the light-emitting element can be turned on to provide illumination brightness while quickly charging the battery, without the need to stop quickly charging the battery, thereby improving the charging rate of the battery.

Description

Technical Field

[0001] This application belongs to the field of circuit technology, and particularly relates to a control circuit and an electronic device. Background Art

[0002] With the rapid development of fast charging technology, most electronic devices support charging the battery using fast charging technology. In addition, the electronic device is also equipped with a light-emitting element, and when the light-emitting element is turned on, the light-emitting element emits light to provide illumination brightness.

[0003] Currently, the battery charging circuit of the electronic device integrates the light-emitting control circuit of the light-emitting element. Since the operating voltage of the light-emitting element is lower than the operating voltage of the battery during fast charging, the electronic device does not support turning on the light-emitting element while fast charging the battery. Thus, when fast charging the battery, if it is necessary to turn on the light-emitting element to provide illumination brightness, it is necessary to stop fast charging the battery, which reduces the charging rate of the battery. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a control circuit and an electronic device, which can solve the technical problem that the battery cannot be fast charged when the light-emitting element is turned on, thereby reducing the charging rate.

[0005] To solve the above technical problem, this application is implemented as follows:

[0006] In a first aspect, the embodiments of this application provide a control circuit, including a fast charging circuit, a switch module, and a light-emitting element;

[0007] The input end of the fast charging circuit is electrically connected to the charging interface, the output end of the fast charging circuit is electrically connected to the first end of the battery, and the second end of the battery is grounded; the first end of the switch module is electrically connected to the first end of the battery, the second end of the switch module is electrically connected to the first end of the light-emitting element; the second end of the light-emitting element is grounded;

[0008] Wherein, when the switch module is in a preset state, the battery is turned on with the light-emitting element.

[0009] In a second aspect, the embodiments of this application provide an electronic device, including the control circuit as described in the first aspect.

[0010] The control circuit in the embodiment of the present application includes a fast charging circuit, a switching module, and a light-emitting element; the input end of the fast charging circuit is electrically connected to the charging interface, the output end of the fast charging circuit is electrically connected to the first end of the battery, and the second end of the battery is grounded; the first end of the switching module is electrically connected to the first end of the battery, and the second end of the switching module is electrically connected to the first end of the light-emitting element; the second end of the light-emitting element is grounded; wherein, when the switching module is in a preset state, the battery is conducted with the light-emitting element. In the embodiment of the present application, when the fast charging circuit is used to quickly charge the battery and the switching module is in a preset state, the battery is conducted with the light-emitting element, thereby conducting the light-emitting element to provide illumination brightness. In this way, while the battery is being quickly charged, the light-emitting element can be conducted to provide illumination brightness without stopping the fast charging of the battery, thereby improving the charging rate of the battery. Description of the Drawings

[0011] Figure 1 is one of the circuit diagrams of the control circuit provided by the embodiment of the present application;

[0012] Figure 2 is one of the working flowcharts of the control circuit provided by the embodiment of the present application;

[0013] Figure 3 is the second circuit diagram of the pixel circuit provided by the embodiment of the present application;

[0014] Figure 4 is the second working flowchart of the control circuit provided by the embodiment of the present application. Detailed Embodiments

[0015] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0016] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0017] The switching tubes used in all embodiments of the present invention may be transistors, triodes, field effect transistors or other devices with the same characteristics. In the embodiments of the present invention, to distinguish between the two poles of the switching tube other than the control pole, one pole is referred to as the first pole and the other pole is referred to as the second pole.

[0018] During actual operation, when the switching tube is a triode, the control pole may be the base, the first pole may be the collector, and the second pole may be the emitter; alternatively, the control pole may be the base, the first pole may be the emitter, and the second pole may be the collector.

[0019] During actual operation, when the switching tube is a transistor or a field effect transistor, the control pole may be the gate, the first pole may be the drain, and the second pole may be the source; alternatively, the control pole may be the gate, the first pole may be the source, and the second pole may be the drain.

[0020] Please refer to Figure 1 , Figure 1 which is one of the circuit diagrams of the control circuit provided by the embodiments of the present application. As Figure 1 shown, the control circuit provided by the embodiments of the present application includes:

[0021] A fast charging circuit 10, a switching module 20, and a light emitting element D1;

[0022] The input end of the fast charging circuit 10 is electrically connected to the charging interface, the output end of the fast charging circuit 10 is electrically connected to the first end of the battery 30, and the second end of the battery 30 is grounded; the first end of the switching module 20 is electrically connected to the first end of the battery 30, the second end of the switching module 20 is electrically connected to the first end of the light emitting element D1; the second end of the light emitting element D1 is grounded. Please refer to Figure 3 , Figure 3 The control circuit shown also includes a fast charging circuit 10, a switching module 20, and a light emitting element D1.

[0023] Figure 1 and Figure 3 The fast charging circuits 10 shown are used to control the voltage provided by the charging interface to be transmitted to the battery 30 to achieve fast charging of the battery 30. Among them, Figure 1 and Figure 3 VBUS in represents the charging interface.

[0024] Figure 1 and Figure 3 The fast charging circuit 10 in may be a charge pump circuit. The charge pump circuit includes a plurality of switched capacitors. The switched capacitors in the charge pump circuit are charged and discharged in different connection modes to achieve a voltage conversion function for fast charging of the battery 30.

[0025] In some embodiments, the fast charging circuit 10 described above may also be a transformer.

[0026] Among them, Figure 1 and Figure 3 the light-emitting element D1 in

[0027] should be understood that during the process of the control circuit shown in Figure 1 and Figure 3 quickly charging the battery 30, the battery 30 and the light-emitting element D1 are conducted through the switch module 20. In this way, the battery 30 can output a voltage to the light-emitting element D1 to conduct the light-emitting element D1.

[0028] Currently, since the operating voltage of the light-emitting element D1 is lower than the output voltage of the charging interface, when the charging interface outputs a voltage to the fast charging circuit 10 to quickly charge the battery 30, if it is necessary to conduct the light-emitting element D1, in order to avoid damage to the component due to excessive voltage, the fast charging mode must be exited, that is, the fast charging circuit 10 is not used to charge the battery 30, and the voltage provided by the battery 30 is used to conduct the light-emitting element D1 to avoid the light-emitting element D1 being broken down by too high a voltage. This results in a delay in conducting the light-emitting element D1. However, the control circuit provided in the embodiments of the present application supports instantaneously conducting the light-emitting element D1 while quickly charging the battery 30.

[0029] In the embodiments of the present application, when using the fast charging circuit 10 to quickly charge the battery 30 and the switch module 20 is in a preset state, the battery 30 and the light-emitting element D1 are conducted, thereby conducting the light-emitting element D1 to provide illumination brightness. In this way, the light-emitting element D1 can be conducted to provide illumination brightness while quickly charging the battery 30, without the need to stop quickly charging the battery 30, thereby improving the charging rate of the battery 30.

[0030] Optionally, the switch module 20 includes a first switching tube Q1 and a second switching tube Q2;

[0031] The first pole of the first switching tube Q1 is electrically connected to the first pole of the second switching tube Q2, and the second pole of the first switching tube Q1 is electrically connected to the first end of the battery 30;

[0032] The second pole of the second switching tube Q2 is electrically connected to the first end of the light-emitting element D1.

[0033] As Figure 1 and Figure 3As shown, the switch module 20 includes a first switch tube Q1 and a second switch tube Q2. The first switch tube Q1 conducts or turns off under the potential provided by a first control terminal CTRL1 connected to its control electrode; the second switch tube Q2 conducts or turns off under the potential provided by a second control terminal CTRL2 connected to its control electrode. Among them, the above-mentioned first switch tube Q1 and second switch tube Q2 can be transistors, triodes, field effect transistors or other devices with the same characteristics.

[0034] When the fast charging circuit 10 is used to quickly charge the battery 30, by turning on the first switch tube Q1 and the second switch tube Q2, the battery 30 is made to conduct with the light-emitting element D1. In this way, the voltage provided by the battery 30 can be transmitted to the light-emitting element D1, causing the light-emitting element D1 to emit light.

[0035] Among them, when the first switch tube Q1 and the second switch tube Q2 are both turned on, it can be determined that the switch module 20 is in a preset state.

[0036] Optionally, the control circuit further includes a third switch tube Q3 and a voltage regulation circuit;

[0037] A first pole of the third switch tube Q3 is electrically connected to a first end of the voltage regulation circuit, and a second pole of the third switch tube Q3 is electrically connected to the charging interface;

[0038] A second end of the voltage regulation circuit is located between the first switch tube Q1 and the second switch tube Q2, and the second end of the voltage regulation circuit is also electrically connected to the power supply interface.

[0039] Please refer to Figure 1 and Figure 3 , Figure 1 and Figure 3 The control circuit shown includes a third switch tube Q3 and a voltage regulation circuit. Among them, the third switch tube Q3 conducts or turns off under the potential provided by a third control terminal CTRL3 connected to its control electrode. When the third switch tube Q3 is in the on state, the voltage regulation circuit can be regarded as a buck circuit to control the reduction of the voltage output by the charging interface.

[0040] Among them, the above-mentioned third switch tube Q3 can be a transistor, a triode, a field effect transistor or other devices with the same characteristics.

[0041] Optionally, the third switch tube Q3 is used to conduct the charging interface and the voltage regulation circuit;

[0042] The second switch tube Q2 is used to conduct the voltage regulation circuit and the light-emitting element D1.

[0043] It should be understood that the battery 30 includes the following 5 charging stages.

[0044] The first stage: Charge the battery 30 with a constant voltage and gradually increase the current.

[0045] The second stage: Charge the battery 30 with a constant current.

[0046] The third stage: Increase the current during the charging process of the battery 30 until the peak current is reached.

[0047] The fourth stage: Gradually reduce the charging current during the charging process of the battery 30 and use a constant voltage.

[0048] The fifth stage: Charge the battery 30 with a constant voltage, gradually reduce the current to 0, and use a constant voltage to fully charge the battery 30.

[0049] Among them, the first stage can be called the pre-charging stage, the second stage can be called the small-current constant-current charging stage, the third stage can be called the large-current constant-current charging stage, the fourth stage can be called the large-current constant-voltage charging stage, and the fifth stage can be called the small-current constant-voltage charging stage.

[0050] In the above-mentioned third stage and fourth stage, the fast charging circuit 10 can be used to charge the battery 30.

[0051] In the first stage, the second stage and the fifth stage, the third switch tube Q3 can be turned on to conduct the charging interface and the voltage regulation circuit, and then the voltage regulation circuit can step down the output voltage of the charging interface. Further, the first switch tube Q1 can be turned on to use the stepped-down output voltage of the charging interface to charge the battery 30. Among them, the above charging path can be called the non-fast charging path.

[0052] Figure 1 and Figure 3 VPH_PWR is also shown in the figure, and the above VPH_PWR is the power supply interface. When charging the battery 30 using the non-fast charging path, the voltage output by the voltage regulation circuit can also supply power to the power supply interface to ensure the normal operation of the electronic device.

[0053] In this embodiment, when the third switch tube Q3 is in the on state, the charging interface and the voltage regulation circuit are conducted, and the voltage regulation circuit steps down the output voltage provided by the charging interface. That is, in the state of charging the battery 30 using the non-fast charging path, the second switch tube Q2 can be turned on so that the output voltage stepped down by the voltage regulation circuit is transmitted to the light-emitting element D1, thereby turning on the light-emitting element D1.

[0054] Optionally, the voltage regulation circuit includes a fifth switch tube, a sixth switch tube and an inductor L;

[0055] The first pole of the fifth switching transistor Q5 serves as the first terminal of the voltage regulation circuit, and the second pole of the fifth switching transistor Q5 is electrically connected to the first pole of the sixth switching transistor Q6;

[0056] The first pole of the sixth switching transistor Q6 is electrically connected to the first terminal of the inductor L, and the second pole of the sixth switching transistor Q6 is grounded;

[0057] The second terminal of the inductor L is electrically connected to the power supply interface, and the second terminal of the inductor L is located between the first switch and the second switch.

[0058] As Figure 1 and Figure 3 shown, the voltage regulation circuit includes a fifth switching transistor, a sixth switching transistor, and an inductor L.

[0059] Among them, the control poles of the fifth switching transistor and the sixth switching transistor are both electrically connected to the voltage regulation control terminal CTRL5, and are turned on or off under the potential provided by the voltage regulation control terminal CTRL5.

[0060] It should be understood that when the third switching transistor Q3 is in the on state, the charging interface outputs a voltage to the voltage regulation circuit, and the voltage regulation circuit steps down the voltage output from the power supply terminal by alternately turning off the fifth switching transistor and the sixth switching transistor. In this state, the voltage regulation circuit is also called a buck converter circuit (BUCK circuit), and outputs the stepped-down voltage.

[0061] It should be understood that when the third switching transistor Q3 is in the off state and the first switching transistor Q1 is in the on state, the battery 30 outputs a voltage to the voltage regulation circuit, and the voltage regulation circuit steps up the voltage output from the battery 30 by alternately turning off the fifth switching transistor and the sixth switching transistor. In this state, the voltage regulation circuit is also called a boost converter circuit (BOOST circuit), and outputs the stepped-up voltage.

[0062] Hereinafter, in combination with Figure 2 to Figure 1 illustrated, the working principle of the control circuit will be described.

[0063] It should be understood that when the charging interface outputs a voltage to the control circuit, the power management chip can determine whether the battery 30 is in the charging state according to the access state of the charging interface.

[0064] In this embodiment, when the charging interface does not output a voltage to the control circuit, that is, when the battery 30 is not in the charging state, the voltage of the battery 30 is read, and it is determined whether the voltage of the battery 30 is greater than a preset threshold value, Figure 2 where Vth in

[0065] When the voltage of the battery 30 is not greater than the preset threshold value, it indicates that the battery power of the battery 30 is too low, then the second switching tube Q2 and the first switching tube Q1 are turned off, and the light-emitting element D1 is turned off.

[0066] When the voltage of the battery 30 is greater than the preset threshold value, it indicates that the voltage provided by the battery 30 can be used to turn on the light-emitting element D1. Then, the third switching tube Q3, the fifth switching tube Q5 and the sixth switching tube Q6 in the voltage regulation circuit are turned off, the second switching tube Q2 and the first switching tube Q1 are turned on, and the light-emitting element D1 is turned on through the first path.

[0067] Among them, the first path refers to the output voltage of the battery 30 passing through the first switching tube Q1 and the second switching tube Q2 to the light-emitting element D1.

[0068] When the battery 30 is in the charging state, it is judged whether the fast charging circuit 10 is working, that is, it is judged whether the battery 30 is in the high-power charging state.

[0069] When the battery 30 is in the high-power charging state, it is judged whether the voltage of the battery 30 is greater than the preset threshold value.

[0070] When the voltage of the battery 30 is greater than the preset threshold value, it indicates that the voltage provided by the battery 30 can be used to turn on the light-emitting element D1. Then, the third switching tube Q3, the fifth switching tube and the sixth switching tube are turned off, the second switching tube Q2 and the first switching tube Q1 are turned on, and the light-emitting element D1 is turned on through the first path.

[0071] When the voltage of the battery 30 is not greater than the preset threshold value, it indicates that the battery power of the battery 30 is too low, then the second switching tube Q2 and the first switching tube Q1 are turned off, and the light-emitting element D1 is turned off.

[0072] When the battery 30 is not in the high-power charging state, it is judged whether the voltage of the battery 30 is greater than the preset threshold value.

[0073] When the voltage of the battery 30 is greater than the preset threshold value, the third switching tube Q3 is turned on, the fifth switching tube and the sixth switching tube are alternately turned on, so that the voltage regulation circuit steps down the voltage provided by the charging interface; and the second switching tube Q2 is turned on, and the light-emitting element D1 is turned on through the second path.

[0074] Among them, the second path refers to the output voltage of the charging interface passing through the third switching tube Q3, the voltage regulation circuit and the second switching tube Q2 to the light-emitting element D1.

[0075] When the voltage of the battery 30 is not greater than the preset threshold value, it indicates that the battery power of the battery 30 is too low, then the second switching tube Q2 and the first switching tube Q1 are turned off, and the light-emitting element D1 is turned off.

[0076] Optionally, the control circuit further includes a fourth switching tube Q4;

[0077] The first pole of the fourth switching transistor Q4 is electrically connected to the first end of the voltage regulation circuit. The second pole of the fourth switching transistor Q4 is electrically connected to the light-emitting element D1, and the second pole of the fourth switching transistor Q4 is also electrically connected to the second pole of the second switching transistor Q2.

[0078] As Figure 3 shown, the fourth switching transistor Q4 is turned on or off under the potential provided by the fourth control terminal CTRL4 connected to its control pole.

[0079] Optionally, the fourth switching transistor Q4 is configured to control the conduction between the charging interface and the light-emitting element D1 when the third switching transistor Q3 is in the on state.

[0080] In this embodiment, when Figure 3 the shown control circuit charges the battery 30 through the fast charging path, the battery 30 and the voltage regulation circuit are turned on through the first switching transistor Q1, and the voltage regulation circuit and the light-emitting element D1 are turned on through the fourth switching transistor Q4. In this way, the battery 30 can output a voltage to the light-emitting element D1 to turn on the light-emitting element D1.

[0081] Optionally, the fourth switching transistor Q4 is further configured to control the conduction between the voltage regulation circuit and the light-emitting element D1 when the first switching transistor Q1 turns on the voltage regulation circuit and the battery 30.

[0082] In this embodiment, when Figure 3 the shown control circuit charges the battery 30 through the non-fast charging path, the third switching transistor Q3 is turned on to connect the charging interface and the voltage regulation circuit, and the voltage regulation circuit is used to control the reduction of the output voltage of the charging interface; the second switching transistor Q2 is turned on to connect the voltage regulation circuit and the light-emitting element D1. In this way, the light-emitting element D1 is turned on using the reduced output voltage of the charging interface.

[0083] In the above embodiment, by providing the fourth switching transistor Q4, the light-emitting element D1 can also be turned on to provide illumination brightness during the fast charging state of the battery 30, further improving the charging rate of the battery 30.

[0084] Next, in combination with Figure 4 to Figure 3 the working principle of the shown control circuit will be described.

[0085] When the battery 30 is not in the charging state and the voltage of the battery 30 is greater than the preset threshold, the third switching transistor Q3, the fourth switching transistor Q4, the fifth switching transistor Q5, and the sixth switching transistor Q6 are turned off, and the first switching transistor Q1 and the second switching transistor Q2 are turned on to turn on the light-emitting element D1 through the first path.

[0086] When the battery 30 is not in a charging state and the voltage of the battery 30 is less than or equal to a preset threshold, turn off the second switching transistor Q2 and the third switching transistor Q3, turn on the fourth switching transistor and the first switching transistor Q1, and alternately turn on the sixth switching transistor and the fifth switching transistor Q5, and use the voltage regulating circuit to boost the voltage provided by the battery 30, and conduct the light-emitting element D1 through the third path.

[0087] Among them, the above-mentioned third path means that the output voltage of the battery 30 passes through the first switching transistor Q1, the voltage regulating circuit boosts the output voltage of the battery 30, and the boosted voltage is transmitted to the light-emitting element D1 through the fourth switching transistor to conduct the light-emitting element D1.

[0088] When the battery 30 is in a charging state and the battery 30 is not in a high-power charging state, that is, when the battery 30 is charged using a non-fast charging path, turn off the first switching transistor Q1 and the fourth switching transistor Q4, turn on the second switching transistor Q2, turn on the third switching transistor Q3 and the fourth switching transistor, and alternately turn on the sixth switching transistor and the fifth switching transistor Q5, so that the voltage regulating circuit controls to reduce the output voltage of the charging interface, and conduct the light-emitting element D1 through the fourth path.

[0089] Among them, the above-mentioned fourth path means that the output voltage of the electrical interface passes through the third switching transistor Q3, the voltage regulating circuit steps down the output voltage of the charging interface, and the stepped-down voltage is transmitted to the light-emitting element D1 through the fourth switching transistor to conduct the light-emitting element D1.

[0090] It should be understood that when the battery 30 is charged using a non-fast charging path, the third switching transistor Q3 can also be turned on, and the sixth switching transistor and the fifth switching transistor Q5 are alternately turned on, so that the voltage regulating circuit steps down the output voltage of the charging interface; and the second switching transistor Q2 is turned on, and the light-emitting element D1 is conducted through the second path.

[0091] When the battery 30 is fast-charged and the voltage of the battery 30 is greater than the preset voltage, turn on the second switching transistor Q2 and the first switching transistor Q1, turn off the third switching transistor Q3, the fourth switching transistor Q4, the fifth switching transistor Q5 and the sixth switching transistor Q6, and conduct the light-emitting element D1 through the first path.

[0092] When the battery 30 is fast-charged and the voltage of the battery 30 is not greater than the preset voltage, turn off the second switching transistor Q2 and the third switching transistor Q3, turn on the fourth switching transistor and the first switching transistor Q1, and alternately turn on the sixth switching transistor and the fifth switching transistor Q5, and use the voltage regulating circuit to boost the voltage provided by the battery 30, and conduct the light-emitting element D1 through the third path.

[0093] From the above content, it can be obtained that compared with Figure 1 the control circuit shown, Figure 3The control circuit therein can boost the voltage output by the battery 30 through the voltage regulation circuit when the voltage of the battery 30 is less than or equal to the threshold voltage, and then turn on the light-emitting element D1, enriching the conduction modes of the light-emitting element D1.

[0094] Optionally, the control circuit further includes a current source Is;

[0095] The first end of the current source Is is electrically connected to the second end of the switch module 20, and the second end of the current source Is is electrically connected to the first end of the light-emitting element D1.

[0096] As Figure 1 and Figure 3 shown, the control circuit provided in this embodiment further includes a current source Is. The current source Is is arranged between the light-emitting element D1 and the second switching transistor Q2, and the current source Is is used to control the magnitude of the current passing through the light-emitting element D1 to avoid damage to the light-emitting element D1 caused by excessive current.

[0097] In an embodiment of the present application, an electronic device is further provided. The electronic device includes the control circuit provided in the above embodiment. Among them, the specific implementation manner of the control circuit can refer to the above description and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0098] In an embodiment of the present invention, the above-mentioned electronic device can be a computer, a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA for short), a mobile Internet device (MID), a wearable device, an e-reader, a navigator, a digital camera, etc.

[0099] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A control circuit, characterized in that, It includes a fast charging circuit, a switching module, and a light-emitting element; The input end of the fast charging circuit is electrically connected to the charging interface, the output end of the fast charging circuit is electrically connected to the first end of the battery, and the second end of the battery is grounded; the first end of the switching module is electrically connected to the first end of the battery, and the second end of the switching module is electrically connected to the first end of the light-emitting element; the second end of the light-emitting element is grounded; Wherein, when the switching module is in a preset state, the battery is conducted to the light-emitting element; The switching module includes a first switching tube and a second switching tube; The first pole of the first switching tube is electrically connected to the first pole of the second switching tube, and the second pole of the first switching tube is electrically connected to the first end of the battery; The second pole of the second switching tube is electrically connected to the first end of the light-emitting element; The control circuit further includes a third switching tube and a voltage regulating circuit; The first pole of the third switching tube is electrically connected to the first end of the voltage regulating circuit, and the second pole of the third switching tube is electrically connected to the charging interface; The second end of the voltage regulating circuit is located between the first switching tube and the second switching tube, and the second end of the voltage regulating circuit is also electrically connected to the power supply interface; The control circuit further includes a fourth switching tube; The first pole of the fourth switching tube is electrically connected to the first end of the voltage regulating circuit, the second pole of the fourth switching tube is electrically connected to the light-emitting element, and the second pole of the fourth switching tube is also electrically connected to the second pole of the second switching tube; When the battery is fast-charged and the voltage of the battery is greater than a preset voltage, the second switching tube and the first switching tube are turned on, the third switching tube and the fourth switching tube are turned off, and the first path is used to conduct the light-emitting element. The first path is the path for the battery output voltage to pass through the first switching tube and the second switching tube to the light-emitting element; When the battery is fast-charged and the voltage of the battery is not greater than the preset voltage, the second switching tube and the third switching tube are turned off, the fourth switching tube and the first switching tube are turned on, and the voltage regulating circuit is used to boost the voltage provided by the battery. The third path is used to conduct the light-emitting element. The third path is the path for the battery output voltage to pass through the first switching tube, the voltage regulating circuit boosts the battery output voltage, and the boosted voltage is transmitted to the light-emitting element through the fourth switching tube.

2. The control circuit according to claim 1, characterized in that The third switching tube is used to conduct the charging interface and the voltage regulating circuit; The second switching tube is used to conduct the voltage regulating circuit and the light-emitting element.

3. The control circuit according to claim 1, wherein The fourth switching tube is used to control the conduction between the charging interface and the light-emitting element when the third switching tube is in a conducting state.

4. The control circuit according to claim 1, wherein The fourth switching tube is further used to control the conduction between the voltage regulating circuit and the light-emitting element when the first switching tube conducts the voltage regulating circuit and the battery.

5. The control circuit according to claim 1, characterized in that, The voltage regulating circuit includes a fifth switching tube, a sixth switching tube, and an inductor; The first pole of the fifth switching transistor serves as the first terminal of the voltage regulation circuit, and the second pole of the fifth switching transistor is electrically connected to the first pole of the sixth switching transistor; The first pole of the sixth switching transistor is electrically connected to the first terminal of the inductor, and the second pole of the sixth switching transistor is grounded; The second terminal of the inductor is electrically connected to the power supply interface, and the second terminal of the inductor is located between the first switch and the second switch.

6. The control circuit according to claim 1, characterized in that, The control circuit further includes a current source; The first terminal of the current source is electrically connected to the second terminal of the switching module, and the second terminal of the current source is electrically connected to the first terminal of the light-emitting element.

7. An electronic device, characterized in that, Comprising the control circuit according to any one of claims 1 to 6.

Images