Charging wake-up circuit and charging equipment

Abstract

The utility model relates to a charging wake-up circuit and charging equipment, and the circuit comprises an interface module which comprises a first pin, a second pin and a voltage input pin, the first pin is grounded, and when a load is inserted into the interface module, the first pin and the second pin are connected through an elastic sheet; the control module comprises a WAKEUP pin and a third pin, the WAKEUP pin is connected with the second pin, and when the WAKEUP pin receives the low-level signal, the control module controls the level state of the third pin to be a first preset level; and the DC-DC module comprises a fourth pin connected with the third pin and a voltage output pin connected with the voltage input pin, and when the fourth pin detects that the level state of the third pin is the first preset level, the voltage output pin of the DC-DC module starts to supply power. The elastic sheet is arranged between the pins of the interface module, the pins can be grounded through the elastic sheet to automatically wake up the circuit for charging when the load is connected, and the charging requirement of intelligent wake-up of a user is met.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and in particular to a charging awakening circuit and a charging device. Background Art

[0002] Type-A is a universal computer and electronic device interface used to connect computers and various peripheral devices. The Type-A interface is used in the physical wake-up circuit. The current wake-up control methods with the TYPE-A interface include: using a button to control the DC-DC (Direct Current) start method, but it requires manual operation and cannot meet the user's intelligent wake-up charging needs.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Utility Model Content

[0004] The present application provides a charging wake-up circuit and a charging device to solve the above-mentioned technical problem of "not being able to meet the user's intelligent wake-up charging needs".

[0005] According to one aspect of an embodiment of the present application, the present application provides a charging wake-up circuit, including: an interface module, including a first pin, a second pin and a voltage input pin, the first pin is grounded, and when the load is inserted into the interface module, the spring connects the first pin to the second pin; a control module, including a WAKEUP pin and a third pin, the WAKEUP pin is connected to the second pin, and when the WAKEUP pin receives a low-level signal, the control module controls the level state of the third pin to be a first preset level; a DC-DC module, including a fourth pin connected to the third pin and a voltage output pin connected to the voltage input pin, and when the fourth pin detects that the level state of the third pin is the first preset level, the voltage output pin of the DC-DC module starts to supply power.

[0006] Optionally, the level state of the WAKEUP pin of the control module is high level by default before the load is connected.

[0007] Optionally, the interface module further includes an OCP terminal, which is connected to the first pin and the current-sense resistor and is used to detect a current value flowing through the current-sense resistor during the process of supplying power to the load.

[0008] Optionally, the control module further includes an OCP pin, which is connected to the OCP end and is used to obtain a current value detected by the OCP end. If the current value is less than a preset value, the level state of the third pin is adjusted to a second preset level.

[0009] Optionally, the DC-DC module is further configured to, when it is detected that the level state of the third pin is a second preset level, stop the voltage output pin from supplying power.

[0010] Optionally, the interface module further includes a DP pin and a DM pin, the DP pin is a positive wiring port, the DM pin pair is a negative wiring port, and the DP pin and the DM pin are used for data transmission with a connected device.

[0011] Optionally, when the load is inserted into the interface module, it is connected to the first pin and the voltage input pin.

[0012] Optionally, the control module includes a fifth pin, used to provide power to the control module by receiving an input voltage from an external power source.

[0013] Optionally, the DC-DC module includes a sixth pin, configured to provide power to the DC-DC module by receiving an input voltage from an external power source.

[0014] According to another aspect of an embodiment of the present application, the present application provides a charging device, comprising the above-mentioned charging wake-up circuit.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the related art:

[0016] The present application adopts a charging wake-up circuit, including: an interface module, including a first pin, a second pin and a voltage input pin, the first pin is grounded, when the load is inserted into the interface module, the spring connects the first pin to the second pin; a control module, including a WAKEUP pin and a third pin, the WAKEUP pin is connected to the second pin, when the WAKEUP pin receives a low level signal, the control module controls the level state of the third pin to be a first preset level; a DC-DC module, including a fourth pin connected to the third pin and a voltage output pin connected to the voltage input pin, when the fourth pin detects that the level state of the third pin is the first preset level, the voltage output pin of the DC-DC module starts to supply power. By setting a spring between the pins of the interface module, when the load is connected, the spring can automatically wake up the circuit to charge by grounding the pins, meeting the user's intelligent wake-up charging needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the structure of an optional charging wake-up circuit provided according to an embodiment of the present application;

[0020] Figure 2 It is a structural schematic diagram of another optional charging wake-up circuit provided according to an embodiment of the present application;

[0021] Figure 3 A connection diagram of an optional charging wake-up circuit provided according to an embodiment of the present application.

[0022] Figure numerals: 1, first pin; 2, second pin; 3, voltage input pin; 4, WAKEUP pin; 5, third pin; 6, fourth pin; 7, voltage output pin; 8, DP pin; 9, DM pin; 10, fifth pin; 11, sixth pin. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application and have no specific meaning. Therefore, "module" and "component" can be used interchangeably.

[0025] Type-A is a universal computer and electronic device interface used to connect computers and various peripheral devices. The Type-A interface is used in the physical wake-up circuit. The current wake-up control methods with the TYPE-A interface include: using a button to control the DC-DC (Direct Current) start method, but it requires manual operation and cannot meet the user's intelligent wake-up charging needs.

[0026] In order to solve the problem mentioned in the background technology, according to one aspect of an embodiment of the present application, a charging wake-up circuit is provided, such as Figure 1 As shown, including:

[0027] The interface module 102 comprises a first pin 1, a second pin 2 and a voltage input pin 3, wherein the first pin 1 is grounded. When a load is inserted into the interface module, the spring connects the first pin 1 to the second pin 2;

[0028] The control module 104 includes a WAKEUP pin 4 and a third pin 5, wherein the WAKEUP pin 4 is connected to the second pin 2, and when the WAKEUP pin 4 receives a low level signal, the control module controls the level state of the third pin 5 to be a first preset level;

[0029] The DC-DC module 106 includes a fourth pin 6 connected to the third pin 5 and a voltage output pin 7 connected to the voltage input pin 3. When the fourth pin 6 detects that the level state of the third pin 5 is a first preset level, the voltage output pin 7 of the DC-DC module starts to supply power.

[0030] The control module 104 includes an MCU chip (Micro Controller Unit) for controlling the level state of the third pin 5 according to the level signal of the WAKEUP pin 4 .

[0031] The first preset level provided in the embodiment of the present application is a high level.

[0032] In the charging wake-up circuit provided in the present application, a spring is mainly provided to connect the first pin 1 pressed down by the load with the second pin 2, thereby pulling down the level signal of the WAKEUP pin 4, waking up the control module, and then powering the load through the DC-DC module.

[0033] Figure 2 A schematic diagram of another charging wake-up circuit provided for the present application, as shown in the figure, the circuit includes: a DC-DC module 1, a TAPE-A interface module 2, a load module 3 and an MCU module 4, wherein the DC-DC module 1, the TAPE-A interface module 2 and the MCU module 4 are all provided with a ground line (GND), and the BAT+ (i.e., Battery) in the figure supplies power to the DC-DC module 1 and the MCU module 4, thereby charging the load, and the specific wake-up charging method includes: after the load module 3 is inserted into the TAPE-A interface module 2, the TAPE-A interface module 2 wakes up the MCU module 4, and the MCU module 4 controls the DC-DC module 1 to start power supply (i.e., the EN function in the figure), and the specific power supply method is to deliver power to the TAPE-A interface module 2, and then supply power to the load through the TAPE-A interface module 2. Similarly, when power supply is not needed, the MCU module 4 controls the DC-DC module 1 to stop power supply.

[0034] As an optional embodiment, the level state of the WAKEUP pin 4 of the control module is set to a high level by default before the load is connected.

[0035] When the load is not connected, the WAKEUP pin 4 is pulled up by default, and the pin level is at a high level, which will not trigger the wake-up function and can reduce power consumption.

[0036] As an optional embodiment, the interface module further includes an OCP terminal, which is connected to the first pin 1 and the current-sense resistor and is used to detect a current value flowing through the current-sense resistor during the process of supplying power to the load.

[0037] OCP (Over Current Protection) is used to detect the current value flowing through the current sensing resistor. If the current value is too small, the power supply to the load is stopped, which plays a role in circuit protection.

[0038] During the charging process, as the load voltage gradually increases, the charging current will gradually decrease until it stops, so it is necessary to monitor the current value flowing through the current-sense resistor during the charging process.

[0039] As an optional embodiment, the control module further includes an OCP pin, which is connected to the OCP end and is used to obtain the current value detected by the OCP end. If the current value is less than a preset value, the level state of the third pin 5 is adjusted to a second preset level.

[0040] The second preset level provided in the embodiment of the present application is a low level.

[0041] The solution provided in the present application is that when the current continues to decrease, once it decreases to a preset value, the level state of the third pin 5 is adjusted to a low level, so that the DC-DC module stops charging when it detects that the level state of the third pin 5 is a low level.

[0042] The preset value provided in this application is 80mA, and the preset value can also be set according to actual conditions, and there is no limitation on this.

[0043] As an optional embodiment, the DC-DC module is further configured to, when it is detected that the level state of the third pin 5 is a second preset level, cause the voltage output pin 7 to stop supplying power.

[0044] When the DC-DC module detects that the level state of the third pin 5 is at a low level, it indicates that charging is about to end, and at this time, the control voltage output pin 7 stops supplying power.

[0045] Conventional technology uses MOS plus transistor isolation power supply, which uses a lot of materials and cannot accommodate products with particularly high space requirements, resulting in high costs.

[0046] The solution provided in the present application does not require the provision of field effect transistors and triodes to isolate the power supply, which reduces the material usage and saves layout space.

[0047] The physical wake-up circuit provided in the present application can automatically detect the connection of the load, automatically turn on the DC-DC control circuit when the load is connected, and automatically power the load device. When the load device is removed, the DC-DC control circuit will be automatically cut off to achieve automatic sleep, thereby reducing power consumption, reducing costs, and optimizing LAYOUT space.

[0048] As an optional embodiment, the interface module also includes a DP pin 8 and a DM pin 9, wherein the DP pin 8 is a positive wiring port and the DM pin 9 is a negative wiring port, and the DP pin 8 and the DM pin 9 are used for data transmission with a connected device.

[0049] For example, TYPE-A includes a DM pin 9 (DM: Data Minus, data negative signal) and a DP pin 8 (DP: Data Positive, data positive signal), which are used to perform data transmission with a connected device.

[0050] As an optional embodiment, when the load is inserted into the interface module, it is connected to the first pin 1 and the voltage input pin 3 .

[0051] The interface module provided in the present application is a TYPE-A interface in the USB. When a load is connected, it is connected to the first pin 1 and the voltage input pin 3. After the first pin 1 contacts the load, it is connected to the second pin 2 by pressing down the spring sheet. That is, the spring sheet connects the first pin 1 and the second pin 2 together, so there is no need to manually generate a wake-up signal to wake up the circuit.

[0052] When the load unplugs the interface module, the spring rebounds, so that the first pin 1 and the second pin 2 are no longer connected, and the connection between the interface module and the DC-DC module can be automatically cut off, achieving automatic sleep and reducing power consumption.

[0053] The voltage input pin is idle when not charging.

[0054] As an optional embodiment, the control module includes a fifth pin 10, which is used to provide power to the control module by receiving an input voltage from an external power source.

[0055] As an optional embodiment, the DC-DC module includes a sixth pin 11, which is used to provide power to the DC-DC module by receiving an input voltage from an external power source.

[0056] The fifth pin 10 of the control module and the sixth pin 11 of the DC-DC module are both power input pins (i.e., VIN pins) of the modules, which are usually connected to an external power source or battery to provide power to the chip. In a power chip, the VIN pin is one of the most important pins, which receives energy from an external power source to provide the module / chip with the voltage and current required for operation.

[0057] Figure 3 The connection diagram of the charging wake-up circuit provided in the present application is shown in the figure. The circuit includes U1 (DCDC), U2 (MCU) and J1 (which can be understood as USB). BAT+ is the positive electrode of the battery, which is respectively connected to the fifth pin 10 of U1 and the sixth pin 11 (VIN) of U2. Among them, J1 includes 5 pins: the voltage input pin 3 of J1 is used to receive the power supplied by U2 (for example, +5V voltage), the DM pin 9 of J1 is the negative signal terminal (D-), the DP pin 8 of J1 is the positive signal terminal (D+), the first pin 1 (GND) of J1 is the ground terminal, and an OCP (Over Current) is set between the first pin 1 and the ground connection. Protection, overcurrent protection) and R2, the second pin 2 of J1 is a DETE detection pin, and R1 is set between the second pin 2 and the WAKEUP pin 4 of the MCU; U2 includes 4 pins, the fifth pin 10 (VIN) of U2 is connected to the battery, the GND pin of U2 is the ground terminal, the WAKEUP pin 4 of U2 is connected to JI, and the third pin 5 (EN) of U2 is an enable pin; U1 includes 4 pins, the sixth pin 11 (VIN) of U1 is connected to the battery, the GND pin of U1 is the ground terminal, the voltage output pin 7 (SW) of U1 is the power supply pin, and the fourth pin 6 (EN) of U1 is an enable pin, which is used to receive the control signal of the third pin 5 of U2, and control whether the voltage output pin 7 of U1 is powered according to the control signal.

[0058] For example, according to Figure 3Provided is an implementation method of a wake-up circuit, including: when a load is connected to the J1 interface, the DETE PIN of J1 is connected to the GND PIN (grounding), and WAKEUP is pulled to a low level by grounding, and the MCU WAKEUP PIN of U2 is internally turned on by default pull-up, and then the U2 MCU receives a low level, and the MCU of U2 sets the EN PIN to a high level, and the EN PIN module of U1 DCDC receives a high level to turn on the internal switch to control the output voltage to power the load; when the load power supply is less than the set value, generally less than 80mA, then the U2 MCU detects the OCP (OCP PIN of the MCU is omitted in the figure) current of the R2 resistor through AD, and then the EN PIN of the U2 MCU is set to a low level, and the EN PIN module of the U1 DCDC receives a low level to turn off the internal switch to control the output voltage, and the load power supply is disconnected. Among them, R1 in the figure is a current limiting resistor connected to the U2 MCU for wake-up. If you want to wake up again, continue to execute the steps after the load is connected to the J1 interface.

[0059] The present application adopts a charging wake-up circuit, including: an interface module, including a first pin 1, a second pin 2 and a voltage input pin 3, the first pin 1 is grounded, when the load is inserted into the interface module, the spring connects the first pin 1 with the second pin 2; a control module, including a WAKEUP pin 4 and a third pin 5, the WAKEUP pin 4 is connected to the second pin 2, when the WAKEUP pin 4 receives a low level signal, the control module controls the level state of the third pin 5 to be a high level; a DC-DC module, including a fourth pin 6 connected to the third pin 5 and a voltage output pin 7 connected to the voltage input pin 3, when the fourth pin 6 detects that the level state of the third pin 5 is a high level, the voltage output pin 7 of the DC-DC module starts to supply power. By setting a spring between the pins of the interface module, when the load is connected, the spring can automatically wake up the circuit by grounding the pins to charge, thereby meeting the user's intelligent wake-up charging needs.

[0060] According to another aspect of the embodiments of the present application, the present application also provides a charging device, including the above-mentioned charging wake-up circuit.

[0061] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying importance; the words "bottom surface" and "top surface", "inside" and "outside" refer to the geometric direction toward or away from a specific component, respectively.

[0062] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A charging wake-up circuit, characterized in that: include: An interface module comprises a first pin (1), a second pin (2) and a voltage input pin (3), wherein the first pin (1) is grounded, and when a load is inserted into the interface module, a spring connects the first pin (1) and the second pin (2); A control module, comprising a WAKEUP pin (4) and a third pin (5), wherein the WAKEUP pin (4) is connected to the second pin (2), and when the WAKEUP pin (4) receives a low-level signal, the control module controls the level state of the third pin (5) to be a first preset level; The DC-DC module comprises a fourth pin (6) connected to the third pin (5) and a voltage output pin (7) connected to the voltage input pin (3); when the fourth pin (6) detects that the level state of the third pin (5) is the first preset level, the voltage output pin (7) of the DC-DC module starts to supply power.

2. The circuit according to claim 1, characterized in that The level state of the WAKEUP pin (4) of the control module is set to a high level by default before the load is connected.

3. The circuit according to claim 1, characterized in that The interface module also includes an OCP terminal, which is connected to the first pin (1) and a current-sensing resistor and is used to detect the current value flowing through the current-sensing resistor during the process of supplying power to the load.

4. The circuit according to claim 3, characterized in that The control module further comprises an OCP pin, which is connected to the OCP end and is used to obtain the current value detected by the OCP end. If the current value is less than a preset value, the level state of the third pin (5) is adjusted to a second preset level.

5. The circuit according to claim 2, characterized in that The DC-DC module is also used for, when it is detected that the level state of the third pin (5) is a second preset level, causing the voltage output pin (7) to stop supplying power.

6. The circuit according to claim 1, characterized in that The interface module further comprises a DP pin (8) and a DM pin (9), wherein the DP pin (8) is a positive wiring port, and the DM pin (9) is a negative wiring port, and the DP pin (8) and the DM pin (9) are used for data transmission with a connected device.

7. The circuit according to claim 1, characterized in that When the load is inserted into the interface module, it is connected to the first pin (1) and the voltage input pin (3).

8. The circuit according to claim 1, characterized in that The control module comprises a fifth pin (10) for providing power to the control module by receiving an input voltage from an external power source.

9. The circuit according to claim 1, characterized in that The DC-DC module comprises a sixth pin (11) for providing power to the DC-DC module by receiving an input voltage from an external power source.

10. A charging device, characterized in that: The charging wake-up circuit comprises the charging wake-up circuit according to any one of claims 1 to 9.

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