A charging plug supporting dual-port fast charging

Abstract

The utility model relates to the technical field of charging heads, and specifically to a charging plug supporting dual-port fast charging, the charging plug comprising a shell, a first USB interface and a second USB interface arranged at one end of the shell, an electric shock plug rotatably arranged at the other end of the shell, and an inner control board arranged in the shell, wherein the control board is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a transformer module, an output filtering module and a current detection module.

Description

Technical Field

[0001] The utility model relates to the technical field of charging heads, and in particular to a charging plug supporting dual-port fast charging. Background Art

[0002] Currently, mobile phones and other electronic devices need to be charged using USB chargers, but existing charging heads generally only have one USB port, which is not user-friendly for users who charge multiple devices. Although there are some charging heads with multiple USB ports on the market, the existing USB ports cannot charge both devices at the same time at the highest power. The reason is that the voltage conversion requirements of the USB ports are relatively high, and the existing drive circuits can no longer meet the voltage requirements of the dual USB ports charging at the same time at the highest power, which limits the user experience. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a charging plug that supports dual-port fast charging, which can realize the charging requirements of two USB ports at the same time at the highest power, thereby improving the user experience.

[0004] The utility model is realized by the following counting scheme:

[0005] A charging plug supporting dual-port fast charging includes a shell, a first USB interface and a second USB interface arranged at one end of the shell, an electric shock plug rotatably arranged at the other end of the shell, and an inner control panel arranged at the shell.

[0006] The control board is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a transformer module, an output filtering module and a current detection module; the input end of the input protection module is electrically connected to the electric shock plug, the output end of the input protection module is electrically connected to the input end of the input rectification and filtering module, the output end of the input rectification and filtering module is electrically connected to the input end of the RCD absorption module and the input end of the current detection module respectively, the output end of the RCD absorption module is electrically connected to the input end of the synchronous rectification module through the transformer module, and the output end of the synchronous rectification module is electrically connected to the first USB interface and the second USB interface through the output filtering module.

[0007] Wherein, the input protection module includes a fuse of model T2A250V.

[0008] Among them, the input rectification and filtering module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, an inductor L2 and a resistor R1. The No. 1 end corner of the bridge rectifier BD1 is electrically connected to the input protection module, the No. 3 end corner of the bridge rectifier BD1 is electrically connected to the N end of the electric shock plug, the No. 4 end corner of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2, the No. 2 end corner of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1, one end of the inductor L1 and one end of the resistor R1, the other end of the inductor L2 is electrically connected to the negative electrode of the capacitor EC2, and the positive electrode of the capacitor RC2 is electrically connected to the other end of the inductor L1, the other end of the resistor R1 and the input end of the RCD absorption module.

[0009] Among them, the RCD absorption module includes a capacitor C1, a resistor R3, a resistor R2 and a diode D1, one end of the capacitor C1, one end of the resistor R3 and the first input end of the transformer module are electrically connected to the output end of the input rectifier and filter module, one end of the resistor R2 is electrically connected to the other end of the capacitor C1 and the other end of the resistor R3, the other end of the resistor R2 is electrically connected to the cathode of the diode D1, and the anode of the diode D1 is electrically connected to the second input end of the transformer module and the input end of the current detection module.

[0010] Among them, the synchronous rectification module includes a chip U2, a resistor R11, a capacitor C4, a resistor R12, a capacitor C5, a capacitor C6, a resistor R13 and a resistor R14, the output filtering module includes a capacitor EC4, the D end of the chip U2 is electrically connected to the first output end of the transformer module and one end of the resistor R11, the other end of the resistor R11 is electrically connected to one end of the capacitor C4, the other end of the capacitor C4 is electrically connected to the GND end of the chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R13 and the negative electrode of the capacitor EC4, the VCC end of the chip U2 is electrically connected to the other end of the resistor C5 and one end of the resistor R12, the second output end of the transformer module is electrically connected to the other end of the resistor R12, one end of the resistor R14, one end of the resistor R13 and the positive electrode of the capacitor EC4, and the other end of the resistor R14 is electrically connected to the other end of the capacitor C6.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses a charging plug supporting dual-port fast charging, which is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a voltage transformation module, an output filtering module and a current detection module. It controls the voltage and current when two dual USB interfaces are charged at the same time, so as to meet the demand of charging the dual USB interfaces at the highest power at the same time, and provides a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 This is a circuit schematic diagram of the utility model.

[0016] Reference numerals

[0017] Shell--100, first USB interface--101, second USB interface--102, electric contact plug--103. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] Currently, mobile phones and other electronic devices need to be charged using USB chargers, but existing charging heads generally only have one USB port, which is not user-friendly for users who charge multiple devices. Although there are some charging heads with multiple USB ports on the market, the existing USB ports cannot charge both devices at the same time at the highest power. The reason is that the voltage conversion requirements of the USB ports are relatively high, and the existing drive circuits can no longer meet the voltage requirements of the dual USB ports charging at the same time at the highest power, which limits the user experience.

[0022] In order to solve the above problems, this embodiment discloses a charging plug supporting dual-port fast charging, and its structure is as follows: Figure 1 As shown, the charging plug includes a housing 100 , a first USB interface 101 and a second USB interface 102 disposed at one end of the housing 100 , an electric shock plug 103 rotatably disposed at the other end of the housing 100 , and an inner control panel disposed in the housing 100 .

[0023] The circuit diagram of the control board of the charging plug of this embodiment is as follows: Figure 2 As shown, it is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a transformer module, an output filtering module and a current detection module; the input end of the input protection module is electrically connected to the electric shock plug 103, the output end of the input protection module is electrically connected to the input end of the input rectification and filtering module, the output end of the input rectification and filtering module is electrically connected to the input end of the RCD absorption module and the input end of the current detection module respectively, the output end of the RCD absorption module is electrically connected to the input end of the synchronous rectification module through the transformer module, and the output end of the synchronous rectification module is electrically connected to the first USB interface 101 and the second USB interface 102 through the output filtering module.

[0024] In this embodiment, the first USB interface 101 and the second USB interface 102 may be two TYPC-A interfaces, or one TYPC-A interface and one TYPC-C interface.

[0025] Specifically, the input protection module includes a fuse of model T2A250V.

[0026] Specifically, the input rectifier and filter module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, an inductor L2 and a resistor R1. Terminal corner No. 1 of the bridge rectifier BD1 is electrically connected to the input protection module, terminal corner No. 3 of the bridge rectifier BD1 is electrically connected to the N end of the electric shock plug 103, terminal corner No. 4 of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2, terminal corner No. 2 of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1, one end of the inductor L1 and one end of the resistor R1, the other end of the inductor L2 is electrically connected to the negative electrode of the capacitor EC2, and the positive electrode of the capacitor RC2 is electrically connected to the other end of the inductor L1, the other end of the resistor R1 and the input end of the RCD absorption module.

[0027] Specifically, the RCD absorption module includes a capacitor C1, a resistor R3, a resistor R2 and a diode D1. One end of the capacitor C1, one end of the resistor R3 and the first input end of the transformer module are electrically connected to the output end of the input rectifier and filter module. One end of the resistor R2 is electrically connected to the other end of the capacitor C1 and the other end of the resistor R3 respectively. The other end of the resistor R2 is electrically connected to the cathode of the diode D1. The anode of the diode D1 is electrically connected to the second input end of the transformer module and the input end of the current detection module respectively.

[0028] Specifically, the synchronous rectification module includes a chip U2, a resistor R11, a capacitor C4, a resistor R12, a capacitor C5, a capacitor C6, a resistor R13 and a resistor R14, the output filtering module includes a capacitor EC4, the D end of the chip U2 is electrically connected to the first output end of the transformer module and one end of the resistor R11, respectively, the other end of the resistor R11 is electrically connected to one end of the capacitor C4, the other end of the capacitor C4 is electrically connected to the GND end of the chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R13 and the negative electrode of the capacitor EC4, the VCC end of the chip U2 is electrically connected to the other end of the resistor C5 and one end of the resistor R12, the second output end of the transformer module is electrically connected to the other end of the resistor R12, one end of the resistor R14, one end of the resistor R13 and the positive electrode of the capacitor EC4, and the other end of the resistor R14 is electrically connected to the other end of the capacitor C6.

[0029] In summary, a charging plug that supports dual-port fast charging in this embodiment is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a voltage transformation module, an output filtering module and a current detection module. It controls the voltage and current when two dual USB ports are charging at the same time to meet the requirements of charging the dual USB ports at the highest power at the same time, and provides a better user experience.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A charging plug supporting dual-port fast charging, comprising a housing, a first USB interface and a second USB interface arranged at one end of the housing, an electric shock plug rotatably arranged at the other end of the housing, and an inner control panel arranged at the housing, characterized in that: The control board is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, a voltage transformation module, an output filtering module and a current detection module. The input end of the input protection module is electrically connected to the electric shock plug, the output end of the input protection module is electrically connected to the input end of the input rectification and filtering module, the output end of the input rectification and filtering module is electrically connected to the input end of the RCD absorption module and the input end of the current detection module respectively, the output end of the RCD absorption module is electrically connected to the input end of the synchronous rectification module through the transformer module, and the output end of the synchronous rectification module is electrically connected to the first USB interface and the second USB interface through the output filtering module.

2. A charging plug supporting dual-port fast charging according to claim 1, characterized in that: The input protection module includes a fuse of model T2A250V.

3. A charging plug supporting dual-port fast charging according to claim 1, characterized in that: The input rectification and filtering module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, an inductor L2 and a resistor R1. End corner No. 1 of the bridge rectifier BD1 is electrically connected to the input protection module, end corner No. 3 of the bridge rectifier BD1 is electrically connected to the N end of the electric shock plug, end corner No. 4 of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2, end corner No. 2 of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1, one end of the inductor L1 and one end of the resistor R1, the other end of the inductor L2 is electrically connected to the negative electrode of the capacitor EC2, and the positive electrode of the capacitor RC2 is electrically connected to the other end of the inductor L1, the other end of the resistor R1 and the input end of the RCD absorption module.

4. The charging plug supporting dual-port fast charging according to claim 1, characterized in that: The RCD absorption module includes a capacitor C1, a resistor R3, a resistor R2 and a diode D1. One end of the capacitor C1, one end of the resistor R3 and the first input end of the transformer module are electrically connected to the output end of the input rectifier and filter module. One end of the resistor R2 is electrically connected to the other end of the capacitor C1 and the other end of the resistor R3 respectively. The other end of the resistor R2 is electrically connected to the cathode of the diode D1. The anode of the diode D1 is electrically connected to the second input end of the transformer module and the input end of the current detection module respectively.

5. The charging plug supporting dual-port fast charging according to claim 1, characterized in that: The synchronous rectification module includes a chip U2, a resistor R11, a capacitor C4, a resistor R12, a capacitor C5, a capacitor C6, a resistor R13 and a resistor R14, and the output filtering module includes a capacitor EC4. The D end of the chip U2 is electrically connected to the first output end of the transformer module and one end of the resistor R11, respectively. The other end of the resistor R11 is electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is electrically connected to the GND end of the chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R13 and the negative electrode of the capacitor EC4, respectively. The VCC end of the chip U2 is electrically connected to the other end of the resistor C5 and one end of the resistor R12, respectively. The second output end of the transformer module is electrically connected to the other end of the resistor R12, one end of the resistor R14, one end of the resistor R13 and the positive electrode of the capacitor EC4, respectively, and the other end of the resistor R14 is electrically connected to the other end of the capacitor C6.

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