Charging line control circuit, charger and electronic equipment

Abstract

The utility model provides a charging line control circuit, a charger and electronic equipment, and relates to the technical field of charging, and the charging line control circuit comprises a power adapter, a step-down charge pump, a light-emitting main control chip and a plurality of light-emitting units. And the step-down charge pump is used for converting the output voltage of the power adapter in different working states into the working input voltage of the light-emitting main control chip. The voltage reduction charge pump is adopted for power conversion, the voltage output by the power adapter is converted into the working input voltage of the light-emitting main control chip, and compared with a traditional voltage reduction mode in which the voltage is consumed to the target voltage, the voltage reduction charge pump performs power conversion by controlling the connection mode of an internal capacitor and switching of a switch, so that the power conversion efficiency is improved. Therefore, the conversion efficiency can be improved, the power loss of power supply conversion can be reduced, the heat generation can be reduced, and the service life of the charging wire can be prolonged.

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to a charging cable control circuit, a charger, and an electronic device. Background Technology

[0002] With the widespread use of various electronic devices, charging cables have also become widely used. Charging cables not only charge electronic devices but also facilitate convenient, fast, and stable data transfer. However, traditional charging cables lack lighting effects, making them inconvenient to find or use in dark environments and also aesthetically unappealing. To improve the convenience and aesthetics of charging cables, various charging cables with lighting effects have gradually emerged. Currently, most chargers can achieve high-voltage fast charging, with the charging voltage simultaneously powering the light-emitting unit within the charging cable.

[0003] Therefore, how to convert the power supply to power the light-emitting unit inside the charging cable has become one of the technical problems that urgently need to be solved at this stage. Utility Model Content

[0004] To address the aforementioned technical problems, this disclosure provides a charging cable control circuit, a charger, and an electronic device.

[0005] In a first aspect, this disclosure provides a charging cable control circuit, including: a power adapter, a step-down charge pump, a light-emitting main control chip, and multiple light-emitting units;

[0006] The step-down charge pump is electrically connected to the power adapter and the light-emitting main control chip respectively, and each light-emitting unit is electrically connected to the light-emitting main control chip;

[0007] The step-down charge pump is used to convert the output voltage of the power adapter under different operating conditions into the operating input voltage of the light-emitting main control chip.

[0008] Optionally, where:

[0009] The step-down charge pump includes a first transistor, a second transistor, a third transistor, a fourth transistor, and an output capacitor;

[0010] The first transistor, the second transistor, the third transistor, and the fourth transistor are connected in series in sequence;

[0011] The first and second terminals of the first transistor are respectively connected to the voltage input terminal and the second transistor. The first and second terminals of the fourth transistor are respectively connected to the third transistor and the first plate of the output capacitor. The second plate of the output capacitor is grounded.

[0012] Optionally, where:

[0013] The step-down charge pump also includes a seventh transistor, an eighth transistor, and a first capacitor;

[0014] The first and second terminals of the seventh transistor are respectively connected to the second terminal of the fourth transistor and the first terminal of the eighth transistor, and the second terminal of the eighth transistor is grounded; the first and second plates of the first capacitor are respectively connected to the second terminal of the first transistor and the second terminal of the seventh transistor.

[0015] Optionally, where:

[0016] The step-down charge pump also includes a fifth transistor, a sixth transistor, a second capacitor, and a third capacitor;

[0017] The first and second terminals of the fifth transistor are respectively connected to the second terminals of the fourth transistor and the sixth transistor; the second terminal of the sixth transistor is grounded; the first and second plates of the second capacitor are respectively connected to the second terminals of the second transistor and the fifth transistor; the first and second plates of the third capacitor are respectively connected to the second terminals of the third transistor and the seventh transistor.

[0018] Optionally, where:

[0019] It includes two sets of the aforementioned step-down charge pumps, with the first electrode of the first transistor in the two sets of step-down charge pumps electrically connected, and the first plate of the output capacitor in the two sets of step-down charge pumps electrically connected.

[0020] Optionally, where:

[0021] The step-down charge pump includes a first voltage conversion state, a second voltage conversion state, and a third voltage conversion state; in the first voltage conversion state, the voltage conversion ratio is 1:1; in the second voltage conversion state, the voltage conversion ratio is 2:1; and in the third voltage conversion state, the voltage conversion ratio is 4:1.

[0022] Optionally, where:

[0023] It also includes a button circuit, which is electrically connected to the light-emitting main control chip to control the light-emitting mode of the light-emitting unit.

[0024] Optionally, where:

[0025] The light-emitting unit includes a first-color light-emitting diode, a second-color light-emitting diode, and a third-color light-emitting diode connected in parallel, wherein the first color, the second color, and the third color are different from each other.

[0026] Secondly, based on the same inventive concept, this disclosure provides a charger, including the charging cable control circuit as described in the first aspect.

[0027] Thirdly, based on the same inventive concept, this disclosure provides an electronic device that uses a charger as described in the second aspect for charging.

[0028] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0029] In the technical solution provided by this disclosure, the charging cable control circuit includes a power adapter, a step-down charge pump, a light-emitting main control chip, and multiple light-emitting units. The step-down charge pump is used to convert the output voltage of the power adapter under different operating states into the working input voltage of the light-emitting main control chip. Using a step-down charge pump for power conversion, converting the voltage output by the power adapter into the working input voltage of the light-emitting main control chip, compared to the traditional step-down method which consumes voltage to the target voltage, this disclosure's step-down charge pump, by controlling the connection method of its internal capacitors and the switching of the switches, performs power conversion, which helps to improve conversion efficiency, thereby reducing power loss during power conversion, reducing heat generation, and ultimately extending the service life of the charging cable. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0031] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 The diagram shown is a schematic of a charging cable control circuit provided in an embodiment of this disclosure;

[0033] Figure 2 The diagram shown is a topology diagram of a charging cable control circuit provided in an embodiment of this disclosure;

[0034] Figure 3 The diagram shown is a topology diagram of another charging cable control circuit provided in an embodiment of this disclosure;

[0035] Figure 4 The diagram shown is a topology diagram of another charging cable control circuit provided in an embodiment of this disclosure;

[0036] Figure 5 The diagram shown is a schematic of a two-phase charge pump architecture provided in an embodiment of this disclosure;

[0037] Figure 6 The diagram shown is a schematic of another charging cable control circuit provided in an embodiment of this disclosure;

[0038] Figure 7 The diagram shown is a schematic diagram of a light-emitting unit provided in an embodiment of this disclosure;

[0039] Figure 8 The diagram shown is a schematic diagram of a light-emitting main control chip provided in an embodiment of this disclosure. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0041] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0042] The inventors discovered in their research that the light-emitting function of charging cables is widely used, but most power adapters in the existing technology can achieve high-voltage fast charging. During charging, the voltage is high and will vary within a certain range. The charging voltage also powers the light-emitting device inside the charging cable. Because the voltage is too high, power conversion is required. Traditional power conversion circuits dissipate the voltage to the target voltage through heat dissipation. This method has low power conversion efficiency and causes serious heat generation.

[0043] Therefore, how to solve the above problems has become one of the urgent technical issues to be addressed at this stage.

[0044] In view of this, in order to solve the above-mentioned technical problems, this disclosure provides a charging cable control circuit, a charger, and an electronic device.

[0045] Figure 1 The diagram shown is a schematic of a charging cable control circuit provided in an embodiment of this disclosure. Please refer to it. Figure 1 This disclosure provides a charging cable control circuit 100, including: a power adapter 10, a step-down charge pump 20, a light-emitting main control chip 30, and multiple light-emitting units 40.

[0046] Among them, the step-down charge pump 20 is electrically connected to the power adapter 10 and the light-emitting main control chip 30 respectively, and each light-emitting unit 40 is electrically connected to the light-emitting main control chip 30.

[0047] The step-down charge pump 20 is used to convert the output voltage of the power adapter 10 under different operating conditions into the operating input voltage of the light-emitting main control chip 30.

[0048] Specifically, after the power adapter 10 is connected to the mains power, it provides charging voltage to the electronic device and power to the light-emitting main control chip 30, thereby controlling the light-emitting unit 40 to emit light. In some optional embodiments, the voltage output by the power adapter 10 is 5V to 20V (inclusive), while the voltage required by the light-emitting main control chip 30 and the light-emitting unit 40 is 5V. Therefore, a step-down charge pump 20 is needed for power conversion. It should be noted that this disclosure only uses the example of the power adapter 10 outputting a voltage of 5V to 20V and the light-emitting main control chip 30 requiring a working input voltage of 5V for illustration, and is not limited to this.

[0049] In this embodiment, the charging cable control circuit 100 includes a step-down charge pump 20. The voltage input terminal of the step-down charge pump 20 receives the voltage output from the power adapter 10. The step-down charge pump 20 converts the output voltage of the power adapter 10 under different operating states into the operating input voltage of the light-emitting main control chip 30, and transmits it to the light-emitting main control chip 30. In some optional embodiments, the voltage output by the power adapter 10 is 20V. After the step-down charge pump 20 steps down the voltage output by the power adapter 10, it outputs a 5V voltage, which is then transmitted to the light-emitting main control chip 30. In other optional embodiments, the voltage output by the power adapter 10 is 10V. After the step-down charge pump 20 steps down the voltage output by the power adapter 10, it outputs a 5V voltage, which is then transmitted to the light-emitting main control chip 30. In yet another optional embodiment, the power adapter 10 outputs a 5V voltage, which flows through the step-down charge pump 20 and is then transmitted to the light-emitting main control chip 30. The voltage transmitted to the light-emitting main control chip 30 is still 5V.

[0050] It is understood that in the charging cable control circuit 100 provided in this disclosure, a step-down charge pump 20 is used for power conversion, converting the voltage output by the power adapter 10 into the working input voltage of the light-emitting main control chip 30. Compared with the traditional step-down method that consumes voltage to the target voltage, the step-down charge pump 20 performs power conversion by controlling the connection method of its internal capacitors and the switching of the switch, which is beneficial to improving conversion efficiency, thereby reducing power loss during power conversion, reducing heat generation, and thus improving the service life of the charging cable.

[0051] In some optional embodiments, the light-emitting main control chip 30 includes a control program to control the light-emitting unit 40 to emit light, thereby facilitating the achievement of different light-emitting effects and improving the aesthetics of the charging cable. It should be noted that the control program inside the light-emitting main control chip 30 is a prior art control program, and this disclosure is not based on any improvement of the control program. Furthermore, this disclosure is only used as an example for illustration and is not intended to limit the scope of the invention; designs can be tailored to specific needs.

[0052] In some optional embodiments, the number of multiple light-emitting units 40 may include 2, 3, 4, etc., and the specific number of light-emitting units 40 can be designed according to actual needs. Optionally, the light-emitting unit 40 can be an LED light, which can be designed on the surface of the charging cable according to a certain arrangement rule. For example, the LED lights are arranged in a spiral wrapped around the surface of the charging cable. In another example, the LED lights are arranged inside the charging cable, and the charging cable is covered by a transparent insulating material, so that the light emitted by the LED lights can be emitted outward through the transparent insulating material.

[0053] Figure 2 The diagram shown is a topology diagram of a charging cable control circuit provided in an embodiment of this disclosure. Please refer to it. Figure 1 and Figure 2 Optionally, the step-down charge pump 20 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, and an output capacitor COUT. The first transistor Q1, second transistor Q2, third transistor Q3, and fourth transistor Q4 are connected in series. The first and second terminals of the first transistor Q1 are connected to the voltage input terminal VIN and the second transistor Q2, respectively. The first and second terminals of the fourth transistor Q4 are connected to the third transistor Q3 and the first plate of the output capacitor COUT, respectively. The second plate of the output capacitor COUT is grounded.

[0054] In some alternative embodiments, please refer to Figure 2The step-down charge pump 20 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, and an output capacitor COUT. The first and second terminals of the first transistor Q1 are respectively connected to the voltage input terminal VIN and the first terminal of the second transistor Q2. The first and second terminals of the second transistor Q2 are respectively connected to the second terminals of the first transistor Q1 and the first terminal of the third transistor Q3. The first and second terminals of the third transistor Q3 are respectively connected to the second terminals of the second transistor Q2 and the first terminal of the fourth transistor Q4. The first and second terminals of the fourth transistor Q4 are respectively connected to the second terminal of the third transistor Q3 and the first plate of the output capacitor COUT. The second plate of the output capacitor COUT is grounded. The second terminal of the fourth transistor Q4 and the first plate of the output capacitor COUT are also connected to the voltage output terminal VOUT. For example, the output voltage of the power adapter 10 is 5V, the operating input voltage of the light-emitting main control chip 30 is 5V, and the output voltage of the power adapter 10 is connected to the voltage input terminal VIN of the step-down charge pump 20. The first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are all turned on, and the voltage output terminal VOUT outputs a voltage of 5V. In this embodiment, the output voltage of the power adapter 10 is equal to the operating input voltage of the light-emitting main control chip, and the voltage signal is directly output after flowing through the step-down charge pump 20. This embodiment is suitable for situations where the input voltage is the same as or close to the target voltage.

[0055] It should be noted that the accompanying drawings are for illustrative purposes only and do not represent the actual structure. For example, the transistors in the accompanying drawings are all shown as P-type transistors, but this disclosure is not limited thereto.

[0056] Figure 3 The diagram shown is a topology diagram of another charging cable control circuit provided in this embodiment of the present disclosure. Please refer to it. Figure 1 and Figure 3 Optionally, the buck charge pump 20 also includes a seventh transistor Q7, an eighth transistor Q8, and a first capacitor C1.

[0057] Among them, the first and second terminals of the seventh transistor Q7 are connected to the second terminals of the fourth transistor Q4 and the eighth transistor Q8, respectively, and the second terminal of the eighth transistor Q8 is grounded; the first and second terminals of the first capacitor C1 are connected to the second terminals of the first transistor Q1 and the seventh transistor Q7, respectively.

[0058] For details, please refer to Figure 3In some optional embodiments, the buck charge pump 20 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a seventh transistor Q7, an eighth transistor Q8, an output capacitor COUT, and a first capacitor C1. Exemplarily, the power adapter 10 outputs 10V, the LED main control chip 30 inputs 5V, and the power adapter 10 outputs its voltage to the buck charge pump 20 via the voltage input terminal VIN. The buck charge pump 20 operates in two phases: a capacitor charging phase and a capacitor discharging phase. During the capacitor charging phase, the first transistor Q1 and the seventh transistor Q7 are turned on, the first capacitor C1 and the output capacitor COUT are connected in series, and the first capacitor C1 and the output capacitor COUT are charged. The voltage of the output capacitor COUT is approximately equal to VIN / 2 (VIN / 2 = 5V). During the capacitor discharge phase, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, and the eighth transistor Q8 are turned on. The first capacitor C1 and the output capacitor COUT are connected in parallel. The first capacitor C1 and the output capacitor COUT discharge, and the voltage between the output capacitor COUT and the first capacitor C1 is approximately equal to VIN / 2 (VIN / 2 = 5V). That is, it is equivalent to reducing the output power of the power adapter 10 to half of its original value, which serves as the working input voltage of the light-emitting main control chip 30.

[0059] It is understood that the present invention uses a step-down charge pump 20 to perform power conversion, converting the voltage output by the power adapter 10 into the working input voltage of the light-emitting main control chip 30. This is beneficial to improving conversion efficiency, thereby reducing power loss during power conversion, reducing heat generation, and thus extending the service life of the charging cable.

[0060] It should be noted that the charging phase and the discharging phase of the capacitor are of the same duration, and the duty cycle of the transistor in the voltage drop charge pump is usually 50%.

[0061] Figure 4 The diagram shown is a topology diagram of another charging cable control circuit provided in this embodiment. Please refer to it. Figure 1 and Figure 4 Optionally, the step-down charge pump 20 also includes a fifth transistor Q5, a sixth transistor Q6, a second capacitor C2, and a third capacitor C3.

[0062] In this configuration, the first and second terminals of the fifth transistor Q5 are connected to the second terminals of the fourth transistor Q4 and the sixth transistor Q6, respectively; the second terminal of the sixth transistor Q6 is grounded; the first and second plates of the second capacitor C2 are connected to the second terminals of the second transistor Q2 and the fifth transistor Q5, respectively; and the first and second plates of the third capacitor C3 are connected to the second terminals of the third transistor Q3 and the seventh transistor Q7, respectively.

[0063] For details, please refer to Figure 4In some optional embodiments, the step-down charge pump 20 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a first capacitor C1, a second capacitor C2, a third capacitor C3, and an output capacitor COUT. When the output voltage of the power adapter 10 is much greater than the operating input voltage of the light-emitting main control chip 30, the step-down charge pump 20 provided in this embodiment performs voltage reduction processing before outputting to the light-emitting main control chip 30. For example, the output voltage of the power adapter 10 is 20V, the operating input voltage of the light-emitting main control chip 30 is 5V, and the output voltage of the power adapter 10 is connected to the voltage input terminal VIN of the step-down charge pump 20. The step-down charge pump 20 operates in two stages: a capacitor charging stage and a capacitor discharging stage. During the charging phase of the capacitor, transistors Q1, Q3, Q6, and Q7 are turned on, while transistors Q2, Q4, Q5, and Q8 are turned off. Specifically, transistors Q1, Q3, Q6, and Q7 are simultaneously turned on. When transistors Q1 and Q7 are on, the first capacitor C1 and the output capacitor COUT are charged. The first plate of the first capacitor C1 is connected to the voltage input terminal VIN, and the voltage across the first plate of the first capacitor C1 is VI. N (VIN = 20V), the voltage of the second plate of the first capacitor C1 is VIN / 4 (VIN / 4 = 5V); the third transistor Q3, the sixth transistor Q6, and the seventh transistor Q7 are turned on, the second capacitor C2 is discharged, and the third capacitor C3 and the output capacitor COUT are charged. The voltages of the first and second plates of the second capacitor C2 are VIN / 2 (VIN / 2 = 10V) and 0V, respectively, and the voltages of the first and second plates of the third capacitor C3 are VIN / 2 (VIN / 2 = 10V) and VIN / 4 (VIN / 4 = 5V), respectively. During the discharge phase of the capacitors, the second transistor Q2, the fourth transistor Q4, the fifth transistor Q5, and the eighth transistor Q8 are turned on, and the first transistor Q1, the third transistor Q3, the sixth transistor Q6, and the seventh transistor Q7 are turned off. In this configuration, the second transistor Q2, the fourth transistor Q4, the fifth transistor Q5, and the eighth transistor Q8 are simultaneously turned on. When the second transistor Q2, the fifth transistor Q5, and the eighth transistor Q8 are turned on, the first capacitor C1 discharges, and the second capacitor C2 and the output capacitor COUT are charged. The voltages of the first and second plates of the first capacitor C1 are 3VIN / 4 (3VIN / 4 = 15V) and 0V, respectively. The voltages of the first and second plates of the second capacitor C2 are 3VIN / 4 (3VIN / 4 = 15V) and VIN / 4 (VIN / 4 = 5V), respectively.The fourth transistor Q4 and the eighth transistor Q8 are turned on, the third capacitor C3 is discharged, and the output capacitor COUT is charged. The voltages of the first and second plates of the third capacitor C3 are VIN / 4 (3VIN / 4 = 15V) and 0V, respectively. That is, it is equivalent to reducing the output power of the power adapter 10 to one-quarter of the original (20V to 5V), which serves as the working input voltage of the light-emitting main control chip 30.

[0064] It is understood that the present invention uses a step-down charge pump 20 to perform power conversion, converting the voltage output by the power adapter 10 into the working input voltage of the light-emitting main control chip 30. This is beneficial to improving conversion efficiency, thereby reducing power loss during power conversion, reducing heat generation, and thus extending the service life of the charging cable.

[0065] It should be noted that the charging phase and the discharging phase of the capacitor are of the same duration, and the duty cycle of the transistor in the voltage drop charge pump is usually 50%.

[0066] Figure 5 The diagram shown is a schematic of a two-phase charge pump architecture provided in an embodiment of this disclosure. Please refer to it. Figure 1 and Figure 5 Optionally, the charging line control circuit 100 includes two sets of step-down charge pumps 20, with the first electrode of the first transistor Q1 in the two sets of step-down charge pumps 20 electrically connected, and the first plate of the output capacitor COUT in the two sets of step-down charge pumps 20 electrically connected.

[0067] For details, please refer to Figure 5 In some optional embodiments, the charging line control circuit 100 includes two sets of step-down charge pumps 20 connected to form a two-phase charge pump architecture. The two-phase charge pump architecture adopts a two-phase working mode, which is beneficial to reduce energy loss during capacitor charging and discharging, thereby improving conversion efficiency. Furthermore, the two-phase charge pump structure is beneficial to reduce the ripple of the output voltage, thereby improving a more stable power output.

[0068] Please refer to Figure 1 Optionally, the step-down charge pump 20 includes a first voltage conversion state, a second voltage conversion state, and a third voltage conversion state; in the first voltage conversion state, the voltage conversion ratio of the step-down charge pump 20 is 1:1; in the second voltage conversion state, the voltage conversion ratio of the step-down charge pump 20 is 2:1; and in the third voltage conversion state, the voltage conversion ratio of the step-down charge pump 20 is 4:1.

[0069] For details, please refer to Figure 1In some optional embodiments, after the power adapter 10 is connected to mains power, the voltage provided to the downstream step-down charge pump 20 is often not a fixed value. For example, the voltage provided by the power adapter 10 to the step-down charge pump 20 is 5V to 20V, and the operating input voltage of the light-emitting main control chip 30 is 5V. When the voltage provided by the power adapter 10 to the step-down charge pump 20 is 5V, the voltage conversion ratio is 1:1, that is, the voltage provided by the power adapter 10 to the step-down charge pump 20 is 5V, and the voltage provided by the step-down charge pump 20 to the light-emitting main control chip 30 is also 5V. When the voltage provided by the power adapter 10 to the step-down charge pump 20 is 10V, the voltage conversion ratio is 2:1, that is, the voltage provided by the power adapter 10 to the step-down charge pump 20 is 10V, and the step-down charge pump 20 steps down the voltage transmitted by the power adapter 10 before transmitting it to the light-emitting main control chip 30, providing the light-emitting main control chip 30 with a voltage of 5V. When the power adapter 10 supplies 20V to the buck charge pump 20, the voltage conversion ratio is 4:1. That is, the power adapter 10 supplies 20V to the buck charge pump 20, which then steps down the voltage before transmitting it to the LED main control chip 30, providing 5V. This configuration allows the buck charge pump 20 to convert different voltage values ​​from the power adapter 10 and output the required operating input voltage to the LED main control chip 30. This facilitates wide input voltage conversion and improves the operation of the LED main control chip 30.

[0070] It should be noted that in this embodiment, the power adapter 10 outputs different output voltages to the buck charge pump 20 under different operating states. The buck charge pump 20 includes a first voltage conversion state, a second voltage conversion state, and a third voltage conversion state. The voltage conversion ratios of the first, second, and third voltage conversion states are 1:1, 2:1, and 4:1, respectively. The buck charge pump 20 converts the different voltages transmitted by the power adapter 10 into the operating input voltage of the light-emitting main control chip 30. Exemplarily, the transistor of the buck charge pump 20 is packaged in a charge pump chip. The charge pump chip includes an IIC (Inter-Integrated Circuit) bus, which communicates with the chip to control the switching of the three conversion states.

[0071] Figure 6 The diagram shown is a schematic of another charging cable control circuit provided in an embodiment of this disclosure. Please refer to it. Figure 6 Optionally, the charging cable control circuit 100 also includes a button circuit 50, which is electrically connected to the light-emitting main control chip 30 to control the light-emitting mode of the light-emitting unit 40.

[0072] In some optional embodiments, the charging cable control circuit 100 also includes a button circuit 50, which allows manual adjustment of different flashing modes of the light via a button switch, thereby improving the flexibility of the charging cable.

[0073] Figure 7 The diagram shown is a schematic representation of a light-emitting unit according to an embodiment of this disclosure. Please refer to it. Figure 7 Optionally, the light-emitting unit 40 includes a first-color light-emitting diode 401, a second-color light-emitting diode 402, and a third-color light-emitting diode 403 connected in parallel, wherein the first color, the second color, and the third color are different from each other.

[0074] Specifically, the light-emitting unit 40 includes three light-emitting diodes (LEDs) connected in parallel. The three LEDs within the same unit 40 are of different colors, including a first-color LED 401, a second-color LED 402, and a third-color LED 403. For example, the first, second, and third colors are red, green, and blue, respectively. The light-emitting unit 40 includes these parallel-connected LEDs. This arrangement allows the light-emitting unit 40 to emit various colors of light, enhancing the aesthetics of the charging cable.

[0075] It should be noted that, as Figure 7 From the perspective shown, the colors of the light-emitting diodes from top to bottom are the first color, the second color, and the third color, respectively. This disclosure is only used as an example for illustration. The order of the different colored light-emitting diodes can be designed according to actual needs, and this disclosure does not impose any specific limitations.

[0076] For example, this disclosure provides a light-emitting main control chip 30. Figure 8 The diagram shown is a schematic of a light-emitting main control chip provided in an embodiment of this disclosure. Please refer to it. Figure 6 and Figure 8 The main control chip 30 for light emission includes a power supply pin VDD, GPIO1 connected to the interrupt pin of an external step-down charge pump 20, GPIO2 and GPIO3 connected to the communication pins of the external step-down charge pump 20's IIC for communication, GPIO4 connected to an external button circuit 50, I1 to I6 being drive current output pins (connected to the anodes of the three LEDs inside the external light-emitting unit 40), and R1 to R12 being drive current input pins (connected to the cathodes of the three LEDs inside the external light-emitting unit 40). I1 to I6 can each output a constant current of up to 20mA, illuminating the light-emitting unit 40 by rapidly scanning and lighting up each LED. It should be noted that this disclosure is only an example and is not limited thereto.

[0077] Based on the same inventive concept, this disclosure provides a charger, including the charging cable control circuit 100 provided in the embodiments of this disclosure.

[0078] It should be noted that the embodiments of the charger provided in this disclosure can be referred to the embodiments of the charging cable control circuit 100, and the repeated parts will not be described again.

[0079] Based on the same inventive concept, this disclosure provides an electronic device that uses a charger provided in the embodiments of this disclosure for charging.

[0080] It should be noted that the electronic device provided in this disclosure uses the charger provided in the disclosed embodiment for charging. Specific embodiments can be found in the embodiment of the charging cable control circuit 100; details that are repeated will not be described again. The electronic device provided in this disclosure can be any product or component that requires charging, such as a mobile phone, tablet computer, or laptop computer.

[0081] As can be seen from the above embodiments, the charging cable control circuit, charger, and electronic device provided in this disclosure achieve at least the following beneficial effects:

[0082] In the technical solution provided by this disclosure, the charging cable control circuit includes a power adapter, a step-down charge pump, a light-emitting main control chip, and multiple light-emitting units. The step-down charge pump is used to convert the output voltage of the power adapter under different operating states into the working input voltage of the light-emitting main control chip. Using a step-down charge pump for power conversion, converting the voltage output by the power adapter into the working input voltage of the light-emitting main control chip, compared to the traditional step-down method which consumes voltage to the target voltage, this disclosure's step-down charge pump, by controlling the connection method of its internal capacitors and the switching of the switches, performs power conversion, which helps to improve conversion efficiency, thereby reducing power loss during power conversion, reducing heat generation, and ultimately extending the service life of the charging cable.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0084] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charging cable control circuit, characterized in that, include: Power adapter, step-down charge pump, main control chip for light emission, and multiple light-emitting units; The step-down charge pump is electrically connected to the power adapter and the light-emitting main control chip respectively, and each light-emitting unit is electrically connected to the light-emitting main control chip; The step-down charge pump is used to convert the output voltage of the power adapter under different operating conditions into the working input voltage of the light-emitting main control chip; The step-down charge pump includes a first transistor, a second transistor, a third transistor, a fourth transistor, and an output capacitor; The first transistor, the second transistor, the third transistor, and the fourth transistor are connected in series in sequence; The first and second terminals of the first transistor are respectively connected to the voltage input terminal and the second transistor. The first and second terminals of the fourth transistor are respectively connected to the third transistor and the first plate of the output capacitor. The second plate of the output capacitor is grounded.

2. The charging cable control circuit according to claim 1, characterized in that, The step-down charge pump also includes a seventh transistor, an eighth transistor, and a first capacitor; The first and second terminals of the seventh transistor are respectively connected to the second terminal of the fourth transistor and the first terminal of the eighth transistor, and the second terminal of the eighth transistor is grounded; the first and second plates of the first capacitor are respectively connected to the second terminal of the first transistor and the second terminal of the seventh transistor.

3. The charging cable control circuit according to claim 2, characterized in that, The step-down charge pump also includes a fifth transistor, a sixth transistor, a second capacitor, and a third capacitor; The first and second terminals of the fifth transistor are respectively connected to the second terminal of the fourth transistor and the first terminal of the sixth transistor; the second terminal of the sixth transistor is grounded; the first and second plates of the second capacitor are respectively connected to the second terminal of the second transistor and the second terminal of the fifth transistor. The first and second plates of the third capacitor are respectively connected to the second electrode of the third transistor and the second electrode of the seventh transistor.

4. The charging cable control circuit according to claim 3, characterized in that, It includes two sets of the aforementioned step-down charge pumps, with the first electrode of the first transistor in the two sets of step-down charge pumps electrically connected, and the first plate of the output capacitor in the two sets of step-down charge pumps electrically connected.

5. The charging cable control circuit according to claim 1, characterized in that, The step-down charge pump includes a first voltage conversion state, a second voltage conversion state, and a third voltage conversion state; in the first voltage conversion state, the voltage conversion ratio is 1:1; in the second voltage conversion state, the voltage conversion ratio is 2:1; and in the third voltage conversion state, the voltage conversion ratio is 4:

1.

6. The charging cable control circuit according to claim 1, characterized in that, It also includes a button circuit, which is electrically connected to the light-emitting main control chip to control the light-emitting mode of the light-emitting unit.

7. The charging cable control circuit according to claim 1, characterized in that, The light-emitting unit includes a first-color light-emitting diode, a second-color light-emitting diode, and a third-color light-emitting diode connected in parallel, wherein the first color, the second color, and the third color are different from each other.

8. A charger, characterized in that, Includes the charging cable control circuit as described in any one of claims 1 to 7.

9. An electronic device, characterized in that, The charger described in claim 8 is used for charging.

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