Control circuit of power adapter and power adapter

Abstract

The control circuit comprises a power supply module, a switch module, an output module and a lighting module, and the switch module is respectively connected with the output module and the lighting module. The output module is used for being connected with external equipment to charge the external equipment, and the switch module is used for controlling the lighting module according to the charging state of the external equipment and a manual control signal of a user. The charging state of the electronic equipment can be automatically identified, when the electronic equipment is detected to be charged, a control signal is sent out to control the lighting module to start lighting, and when the electronic equipment is fully charged, the lighting module is automatically closed. A user can visually know whether the electronic equipment is charged or not and can also visually know whether the electronic equipment is fully charged or not, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the field of adapters, in particular to a control circuit and a power adapter of a power adapter. Background Art

[0002] In the existing technology, a power adapter usually only has the basic function of charging electronic products. Users cannot intuitively know the charging status of the electronic device and whether the electronic device is fully charged, and need to observe the electronic device to judge whether it is full, which affects the user experience. And when the battery of the electronic product is fully charged, the adapter usually does not take further actions. This traditional charging method has certain deficiencies. For example, when charging an electronic product at night, the indicator light or other light sources on the adapter may affect the user's sleep. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a control circuit and a power adapter of a power adapter.

[0004] Specifically, a control circuit of a power adapter includes: a power module, a switch module, an output module and a lighting module, and the switch module is respectively connected to the output module and the lighting module;

[0005] The output module is used to connect to an external device to charge the external device, and the switch module is used to control the lighting module according to the charging status of the external device and the manual control signal of the user.

[0006] Further, in the control circuit of a power adapter described in the utility model, the power module includes: a second power switch, a first power switch, a rectifier bridge, an optocoupler and a transformer, the rectifier bridge is electrically connected to the transformer, the transformer is electrically connected to the first power switch and the second power switch, the emitter in the optocoupler is connected to the second power switch, and the receiver in the optocoupler is connected to the first power switch.

[0007] Further, in the control circuit of a power adapter described in the utility model, the switch module includes: a touch switch or a push switch or a voice control switch, which is used to convert the manual control signal into an electrical signal.

[0008] Further, in the control circuit of a power adapter described in the utility model, the switch module further includes a single-chip microcomputer, and the single-chip microcomputer is connected to the touch switch or the push switch or the voice control switch, and is used to control the lighting module according to the electrical signal.

[0009] Further, in the control circuit of a power adapter according to the present utility model, the output module includes a Type-C interface and / or a USB interface.

[0010] Further, in the control circuit of a power adapter according to the present utility model, the output module further includes an output protocol chip, and the output protocol chip is connected to the Type-C interface and / or the USB interface.

[0011] Further, in the control circuit of a power adapter according to the present utility model, the output module further includes a MOS transistor, and the MOS transistor is connected between the output protocol chip and the USB interface.

[0012] Further, in the control circuit of a power adapter according to the present utility model, the lighting module includes an LED, a voltage regulator, and an operational amplifier, and the output terminal of the voltage regulator is connected to the operational amplifier and the positive electrode of the LED.

[0013] The present utility model also provides a power adapter, including a housing and the control circuit of the power adapter in the above technical solution, and the control circuit of the power adapter is arranged in the housing.

[0014] In a power adapter according to the present utility model, the output module and the power module are respectively located at two ends of the housing, and the lighting module is arranged on one side of the housing close to the output module.

[0015] Implementing the present utility model has the following beneficial effects: it can automatically identify the charging state of an electronic device, and when it detects that an electronic device is charging, it sends a control signal to control the lighting module to turn on the lighting. When the electronic device is fully charged, the lighting module is automatically turned off. This enables the user to intuitively know whether the electronic device is charging and also whether the electronic device is fully charged, improving the user experience. It also solves the problem of waste of electric energy due to the long-term operation of the lighting module after the electronic device is fully charged, improves energy utilization efficiency, and reduces energy consumption. And it allows the user to manually control the turning on and off of the lighting module, increasing the convenience and flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will further illustrate the present utility model in conjunction with the drawings. In the drawings:

[0017] Figure 1 is a schematic diagram of the module structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the circuit structure of the lighting module of the present utility model;

[0019] Figure 3It is a schematic circuit diagram of the switch module of the present utility model;

[0020] Figure 4 It is a schematic circuit diagram of the output module of the present utility model;

[0021] Figure 5 It is a schematic circuit diagram of the power supply module of the present utility model. Detailed implementation manners

[0022] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0023] It should also be noted that, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented in order to thoroughly understand the embodiments of the present utility model. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present utility model.

[0025] Such asFigure 1 As shown in the figure, a control circuit of a power adapter includes: a power supply module, a switch module, an output module, and a lighting module. The switch module is respectively connected to the output module and the lighting module. The output module is used to connect to an external device to charge the external device. The switch module is used to control the lighting module according to the charging state of the external device and the user's manual control signal. Specifically, when starting to charge the external device, the switch module automatically controls the lighting module to turn on the lighting. The external device can be a mobile phone, a tablet computer, a laptop computer, etc. When the external device is fully charged, the switch module automatically controls the lighting module to turn off the lighting, solving the problem of waste of electric energy caused by the long-term on of the lighting module after being fully charged, improving the energy utilization rate, and reducing the energy consumption. At the same time, when receiving the user's manual on or off signal, the switch module controls the lighting module to turn on or off the lighting. For example, when the output module is not connected to an external device, the user can manually turn on or off the lighting module. When the output module is charging the external device, the user can also manually control the lighting module to turn off. When the external device is fully charged, the user can also control the lighting module to turn on, increasing the convenience and flexibility of use.

[0026] In a preferred embodiment, as Figure 5 shown, the power supply module includes: a second power switch U3, a first power switch U1, a rectifier bridge BD1, an optocoupler U2, and a transformer T1. Specifically, the second power switch U3 is a TS16E18H, a high-performance synchronous rectifier power switch supporting high-frequency QR, integrating an N-channel power MOS, suitable for isolated flyback synchronous rectification applications. The TS16E18H can maximize the conduction time of the external-driven MOSFET to obtain the highest possible efficiency. And it autonomously detects the DCM ringing to prevent mis-turn-on. U1 is a MK2789 wide-supply high-frequency QR integrated GaN power switch, with a built-in 650V 165mΩ gallium nitride (GaN FET), and the optimized efficiency at each point is easy to meet the energy efficiency standard. Figure 5 In the figure, R1 - R17 are resistors, EC1 - EC6 are electrolytic capacitors, C1 - C7 are capacitors, AGND, CGND, and BGND are grounding terminals, ACL and ACN are the input terminals of the power supply, LF1 is a common-mode inductor, F1 is a fuse device, and OPTO is the signal terminal of the optocoupler. The power supply module is used to convert the voltage of the input external power supply into a voltage of 5 - 20V to charge the external device. Figure 5 In the figure, the external power supply is input to the transformer T1 after passing through the common-mode inductor LF1 and the rectifier bridge BD1. The transformer T1 is electrically connected to the first power switch U1 and the second power switch U3. The emitter in the optocoupler U2 is connected to the second power switch U3, and the receiver in the optocoupler U2 is connected to the first power switch U1.

[0027] In a preferred embodiment, the switch module includes: a touch switch, a push switch, or a voice control switch (not shown in the figure), which is used to convert a manual control signal into an electrical signal. As Figure 3 shown, the switch module further includes a single-chip microcomputer. The CK signal terminal is the input terminal of the electrical signal. The single-chip microcomputer is connected to the touch switch, the push switch, or the voice control switch, and is used to control the lighting module according to the electrical signal. Further, pin 7 of the single-chip microcomputer is used to detect the charging state of an external device and control the lighting module to turn off when it is fully charged. Figure 2 In Figure 2 , R1-R4 are resistors, C1-C3 are capacitors, and CN1B is a terminal block.

[0028] In a preferred embodiment, the output module includes a Type-C interface and / or a USB interface. As Figure 4 shown, the output module includes a Type-C (TC1) interface and a USB interface (USB1). Further, the output module also includes an output protocol chip U1 and a MOS transistor Q1. The output protocol chip U1 is connected to the Type-C interface and the USB interface. The MOS transistor Q1 is connected between the output protocol chip U1 and the USB interface. Specifically, the output protocol chip U1 is an XDP740DP65U chip, and this chip supports a 65W fast charging protocol. The voltages and currents output by the Type-C include: 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, and 20V / 3.25A. The voltages and currents output by the USB interface include: 5V / 3A, 9V / 2A, and 12V / 1.5A. Figure 4 In Figure 4 , OPTO is the signal terminal of an optocoupler, R1-R3 are resistors, and C1-C3 are capacitors.

[0029] In a preferred embodiment, as Figure 2 shown, the lighting module includes LEDs, a voltage regulator U4, a zener diode U5, and an operational amplifier U6. The output terminal of the voltage regulator U4 is connected to the operational amplifier U6 and the positive electrode of the LED, and is used to stabilize the voltage of the connection between the operational amplifier U6 and the positive electrode of the LED. Specifically, the LEDs include three light-emitting diodes D1, D2, and D3, where D1, D2, and D3 are red, green, and blue light-emitting diodes respectively, to combine into a white light source. Figure 2 In Figure 2 , R18-R28 are resistors, C9-C11 are capacitors, and CN1A is a socket.

[0030] The present utility model also provides a power adapter, which includes a housing and the control circuit of the power adapter in the above technical solution. The control circuit of the power adapter is arranged in the housing. In a power adapter of the present utility model, the output module and the power module are respectively located at both ends of the housing, and the lighting module is arranged on one side of the housing close to the output module.

[0031] Implementing the present utility model has the following beneficial effects: It can automatically identify the charging status of electronic devices. When it detects that an electronic device is charging, it emits a control signal to control the lighting module to turn on the lighting. When the electronic device is fully charged, the lighting module is automatically turned off. This enables users to intuitively know whether an electronic device is charging and also whether the electronic device is fully charged, enhancing the user experience. Moreover, it solves the problem of wasteful power consumption due to the long-term operation of the lighting module after the device is fully charged, improves energy utilization efficiency, and reduces energy consumption. It also allows users to manually control the turning on and off of the lighting module, increasing the convenience and flexibility of use.

[0032] It can be understood that the above embodiments only represent the preferred implementation modes of the present utility model, and the description is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. A control circuit for a power adapter, characterized in that, Comprising: A power supply module, a switch module, an output module, and a lighting module, wherein the switch module is respectively connected to the output module and the lighting module; The output module is used to connect to an external device to charge the external device; The switch module includes: a touch switch or a push switch or a voice-activated switch, which is used to convert a manual control signal into an electrical signal; the switch module further includes a single-chip microcomputer, the single-chip microcomputer is connected to the touch switch or the push switch or the voice-activated switch, and is used to control the lighting module according to the electrical signal; the switch module is used to control the lighting module according to the charging state of the external device and the manual control signal of the user.

2. The control circuit of a power adapter according to claim 1, wherein The power supply module includes: a first power switch, a second power switch, a rectifier bridge, an optocoupler, and a transformer, the rectifier bridge is electrically connected to the transformer, the transformer is electrically connected to the first power switch and the second power switch, the emitter in the optocoupler is connected to the second power switch, and the receiver in the optocoupler is connected to the first power switch.

3. The control circuit of a power adapter according to claim 1, wherein The output module includes a Type-C interface and / or a USB interface.

4. The control circuit of a power adapter according to claim 3, characterized in that, The output module further includes an output protocol chip, and the output protocol chip is connected to the Type-C interface and / or the USB interface.

5. The control circuit of a power adapter according to claim 4, characterized in that The output module further includes a MOS transistor, and the MOS transistor is connected between the output protocol chip and the USB interface.

6. The control circuit of a power adapter according to claim 1, wherein, The lighting module includes an LED, a voltage regulator, and an operational amplifier, and the output terminal of the voltage regulator is connected to the operational amplifier and the positive electrode of the LED.

7. A power adapter, characterized in that, Comprising a housing and a control circuit of the power adapter as described in any one of claims 1-6, and the control circuit of the power adapter is arranged in the housing.

8. A power adapter according to claim 7, characterized in that, The output module and the power supply module are respectively located at two ends of the housing, and the lighting module is arranged on one side of the housing close to the output module.

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