Quick charging circuit structure suitable for charger

Abstract

The utility model discloses a fast charging circuit structure suitable for a charger. The fast charging circuit structure comprises a voltage adjusting circuit, a fast charging control chip and a charging interface. The fast charging control chip is connected with the voltage regulation circuit, the fast charging control chip is also connected with the charging interface, when the fast charging control chip receives an electric signal of the voltage regulation circuit, the fast charging control chip is conducted, and the voltage regulation circuit outputs a power supply to the charging interface through the fast charging control chip and charges the electronic equipment through the charging interface. According to the utility model, the charging speed of the mobile phone is greatly improved, the charging waiting time is reduced, the structure is relatively simple, and manufacturing and implementation are easy.

Description

Technical Field

[0001] The utility model relates to a charging circuit, in particular to a fast charging circuit structure suitable for a charger, mainly a charger for mobile terminals such as mobile phones. Background Art

[0002] In some charging technologies, general chargers only have ordinary intelligent identification charging functions. When charging a mobile phone, the output voltage and current are basically 5V and 2.4A, the charging speed is slow, and the charging time is long. In order to achieve fast charging, many fast charging chargers have also appeared. Many chargers that support fast charging (fast charging) functions generally connect the charging protocol before charging, and start charging after confirming the supported charging voltage and current. The charging protocol here includes USB Power Delivery (power transmission protocol), referred to as USB-PD protocol, and fast charging can be understood as the device performing charging operations under the USB-PD protocol. There are mainly single-hole Universal Serial Bus (USB) chargers on the market, so that only one mobile phone can be charged at a time, or some multi-hole USB chargers, but because the outputs are not independent, the charging process is limited, and there is no fast charging port in the multi-hole USB charger, so that users cannot choose between fast charging and ordinary charging when using the multi-hole USB charger, and the user experience is poor. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a fast charging circuit structure suitable for a charger.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A fast charging circuit structure suitable for a charger includes a voltage adjustment circuit, a fast charging control chip and a charging interface; the fast charging control chip is connected to the voltage adjustment circuit, and the fast charging control chip is also connected to the charging interface. When the fast charging control chip receives an electrical signal from the voltage adjustment circuit, the fast charging control chip is turned on, and the voltage adjustment circuit outputs power to the charging interface through the fast charging control chip, so as to charge the electronic device through the charging interface.

[0006] The fast charging control chip includes a first control pin and a second control pin; the voltage adjustment circuit includes a first switch tube, a second switch tube, an inductor and a capacitor; the control electrode of the first switch tube is connected to the first control pin, the control electrode of the second switch tube is connected to the second control pin, the first transmission electrode of the first switch tube is connected to the reference charging voltage generated externally, the first transmission electrode of the second switch tube is grounded, the second transmission electrode of the first switch tube is connected to the second transmission electrode of the second switch tube, one end of the inductor is connected between the second transmission electrode of the first switch tube and the second transmission electrode of the second switch tube, and the other end of the inductor is connected to the fast charging control chip; the fast charging control chip includes a power pin, the power pin of the fast charging control chip is connected to a capacitor, and the capacitor is grounded.

[0007] The charging interface is a USB-C interface.

[0008] It also includes a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1; one end of the first resistor R1, the second resistor R2 and the third resistor R3 are all connected to the FB pin of the fast charging control chip, the other end of the first resistor R1 is connected to the ADJ pin of the fast charging control chip, the other end of the second resistor R2 is grounded, the other end of the third resistor R3 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded.

[0009] It also includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the BST pin of the fast charging control chip, the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the SW pin of the fast charging control chip.

[0010] The VCC1 pin of the fast charge control chip is grounded through the seventh capacitor C7, and the VCC2 pin of the fast charge control chip is grounded through the eighth capacitor C8.

[0011] The utility model improves the speed of charging a mobile phone, reduces the waiting time for charging, has a relatively simple structure, is easy to manufacture, and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the circuit principle of the utility model. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0014] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does 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 utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0015] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] like Figure 1 As shown, a fast charging circuit structure suitable for a charger includes a voltage adjustment circuit, a fast charging control chip and a charging interface; the fast charging control chip is connected to the voltage adjustment circuit, and the fast charging control chip is also connected to the charging interface. When the fast charging control chip receives an electrical signal from the voltage adjustment circuit, the fast charging control chip is turned on, and the voltage adjustment circuit outputs power to the charging interface through the fast charging control chip, and the electronic device is charged through the charging interface.

[0017] The fast charging control chip includes a first control pin DMA and a second control pin OPA; the voltage adjustment circuit includes a first switch tube M1, a second switch tube M2, an inductor L and a capacitor C; the control electrode of the first switch tube is connected to the first control pin, the control electrode of the second switch tube is connected to the second control pin, the first transmission electrode of the first switch tube is connected to the reference charging voltage generated externally, the first transmission electrode of the second switch tube is grounded, the second transmission electrode of the first switch tube is connected to the second transmission electrode of the second switch tube, one end of the inductor L is connected between the second transmission electrode of the first switch tube and the second transmission electrode of the second switch tube, and the other end of the inductor is connected to the fast charging control chip; the fast charging control chip includes a power pin VBUS, the power pin of the fast charging control chip is connected to the capacitor C, and the capacitor C is grounded.

[0018] The charging interface is a USB-C interface.

[0019] It also includes a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1; one end of the first resistor R1, the second resistor R2 and the third resistor R3 are all connected to the FB pin of the fast charging control chip, the other end of the first resistor R1 is connected to the ADJ pin of the fast charging control chip, the other end of the second resistor R2 is grounded, the other end of the third resistor R3 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded.

[0020] It also includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the BST pin of the fast charging control chip, the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the SW pin of the fast charging control chip.

[0021] The VCC1 pin of the fast charge control chip is grounded through the seventh capacitor C7, and the VCC2 pin of the fast charge control chip is grounded through the eighth capacitor C8.

[0022] The external voltage is introduced into the voltage adjustment circuit, and then conducted to the fast charge control chip, which outputs power to the charging port through the fast charge control chip. The voltage is adjusted by the voltage adjustment circuit to ensure an effective fast charge state.

[0023] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fast charging circuit structure suitable for a charger, characterized in that: It includes a voltage adjustment circuit, a fast charging control chip and a charging interface; the fast charging control chip is connected to the voltage adjustment circuit, and the fast charging control chip is also connected to the charging interface. When the fast charging control chip receives an electrical signal from the voltage adjustment circuit, the fast charging control chip is turned on, and the voltage adjustment circuit outputs power to the charging interface through the fast charging control chip, and the electronic device is charged through the charging interface.

2. The fast charging circuit structure suitable for a charger according to claim 1, characterized in that: The fast charging control chip includes a first control pin and a second control pin; the voltage adjustment circuit includes a first switch tube, a second switch tube, an inductor and a capacitor; the control electrode of the first switch tube is connected to the first control pin, the control electrode of the second switch tube is connected to the second control pin, the first transmission electrode of the first switch tube is connected to the reference charging voltage generated externally, the first transmission electrode of the second switch tube is grounded, the second transmission electrode of the first switch tube is connected to the second transmission electrode of the second switch tube, one end of the inductor is connected between the second transmission electrode of the first switch tube and the second transmission electrode of the second switch tube, and the other end of the inductor is connected to the fast charging control chip; the fast charging control chip includes a power pin, the power pin of the fast charging control chip is connected to a capacitor, and the capacitor is grounded.

3. The fast charging circuit structure suitable for a charger according to claim 1, characterized in that: The charging interface is a USB-C interface.

4. The fast charging circuit structure suitable for a charger according to claim 1, characterized in that: It also includes a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1; one end of the first resistor R1, the second resistor R2 and the third resistor R3 are all connected to the FB pin of the fast charging control chip, the other end of the first resistor R1 is connected to the ADJ pin of the fast charging control chip, the other end of the second resistor R2 is grounded, the other end of the third resistor R3 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded.

5. The fast charging circuit structure suitable for a charger according to claim 1, characterized in that: It also includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the BST pin of the fast charging control chip, the other end of the fourth resistor R4 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the SW pin of the fast charging control chip.

6. The fast charging circuit structure suitable for a charger according to claim 1, characterized in that: The VCC1 pin of the fast charge control chip is grounded through the seventh capacitor C7, and the VCC2 pin of the fast charge control chip is grounded through the eighth capacitor C8.

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