Fast charger with dual USB ports

Abstract

We provide a fast charger with dual USB ports that can meet the needs of charging at the highest power using two USB ports simultaneously, improving the user experience. [Solution] The fast charger with dual USB ports includes a housing 100, a first USB port 101 and a second USB port 102 provided at one end of the housing, an electric shock plug 103 rotatably provided at the other end of the housing, and an internal control board provided in the housing, where the control board is provided with an input protection module, an input rectification filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module and a protocol module.

Description

[Technical field]

[0001] The present invention relates to the technical field of chargers, and in particular to a fast charger with dual USB ports. [Background technology]

[0002] Currently, electronic devices such as mobile phones need to be charged using a USB charger, but conventional chargers generally only have one USB port, which makes it inconvenient for users to charge multiple devices. Although some chargers with multiple USB ports are available on the market, when charging simultaneously using a conventional USB port, it is not possible to charge both devices while maintaining their maximum power at the same time. This is because the voltage conversion requirements of the USB port are high, and conventional driving circuits cannot meet the voltage needs for simultaneous charging at maximum power using dual USB ports, resulting in a limited user experience. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the present invention aims to provide a fast charger with dual USB ports, which can realize the need to charge at the highest power using two USB ports simultaneously, and improve the user experience. [Means for solving the problem]

[0004] The present invention is realized by the following technical means.

[0005] The fast charger with dual USB ports includes a housing, a first USB port and a second USB port provided at one end of the housing, a shock plug rotatably provided at the other end of the housing, and an internal control board provided in the housing, the control board is provided with an input protection module, an input rectification and filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module, and a protocol module, the input end of the input protection module is electrically connected to the shock plug, the output end of the input rectification and filtering module is electrically connected to the input end of the input protection module, and the output end of the input rectification and filtering module is electrically connected to the input end of the input protection module. The protocol module is electrically connected to the input end of the RCD absorption module, the output end of the RCD absorption module and the input end of the auxiliary winding power supply module are respectively electrically connected to the input end of the synchronous rectification module, the output end of the synchronous rectification module is electrically connected to the input end of the output filtering module, the input end of the sampling voltage stabilization feedback module is electrically connected to the input end of the output filtering module and the output end of the output filtering module respectively, the output end of the sampling voltage stabilization feedback module is electrically connected to the input end of the sampling voltage stabilization feedback module, and the output end of the protocol module is electrically connected to the first USB port and the second USB port respectively.

[0006] The input protection module includes a fuse with model number T2A250V.

[0007] The input rectification filtering module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, and an inductor L2, the AC end of the bridge rectifier BD1 is electrically connected to the electric shock plug through the input protection module, the V+ end of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1 and one end of the inductor L1 respectively, the V- end of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2 respectively, the other end of the inductor L1 is electrically connected to the positive electrode of the capacitor EC2 and the input end of the RCD absorption module respectively, and the negative electrode of the capacitor EC2 is electrically connected to the other end of the inductor L2 and grounded.

[0008] The synchronous rectification module includes a chip U3 with model number CX7538BS.

[0009] The sampling voltage stabilization feedback module includes a chip U1 with model number CX75GD100S, a capacitor C26, and a resistor R26.

[0010] The protocol module includes a chip U4 with the model number HUSB382. Effect of the Invention

[0011] The present invention has the following beneficial effects:

[0012] The fast charger with dual USB ports of the present invention is equipped with an input protection module, an input rectification filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module and a protocol module, which meets the need for simultaneous charging at the highest power using dual USB ports, and controls the voltage and current when using two dual USB ports for simultaneous charging, so as to provide a better user experience. [Brief description of the drawings]

[0013] The present invention will be further described with the aid of drawings, but the embodiments in the drawings do not limit the present invention in any way, and those skilled in the art can obtain other drawings based on the following drawings without creative labor.

[0014] [Figure 1] FIG. 2 is a schematic diagram of the three-dimensional structure of the present invention. [Diagram 2] FIG. 2 is a circuit diagram of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] In order to make the above objects, features and advantages of the present invention easier to understand, the following detailed description of the specific embodiment of the present invention will be given in conjunction with the drawings. In order to fully understand the present invention, many specific details will be described in the following description. However, the present invention can be implemented in many ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention, so the present invention is not limited to the specific embodiment disclosed below.

[0016] In addition, in the description of the present invention, the orientations or positional relationships indicated by the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to easily explain and simplify the description of the present invention, and do not indicate or suggest that the devices or parts shown must have a specific orientation and be configured and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply the relative importance or quantity of the indicated technical features. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the invention, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically limited.

[0018] Currently, electronic devices such as mobile phones need to be charged using a USB charger, but conventional chargers generally only have one USB port, which makes it inconvenient for users to charge multiple devices. Although some chargers with multiple USB ports are available on the market, when charging simultaneously using a conventional USB port, it is not possible to charge both devices while maintaining their maximum power at the same time. This is because the voltage conversion requirements of the USB port are high, and conventional driving circuits cannot meet the voltage needs for simultaneous charging at maximum power using dual USB ports, resulting in a limited user experience.

[0019] In order to solve the above problems, this embodiment discloses a fast charger with dual USB ports, the structure of the fast charger includes a housing, a first USB port and a second USB port provided at one end of the housing, an electric shock plug rotatably provided at the other end of the housing, and an internal control board provided in the housing, as shown in FIG.

[0020] The circuit principle diagram of the control board of the charger in this embodiment is as shown in FIG. 2. The control board is provided with an input protection module, an input rectification filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module and a protocol 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 filtering module, the output end of the input rectification filtering module is electrically connected to the input end of the RCD absorption module, the output end of the RCD absorption module and the input end of the auxiliary winding power supply module are respectively electrically connected to the input end of the synchronous rectification module, the output end of the synchronous rectification module is electrically connected to the input end of the output filtering module, the input end of the sampling voltage stabilization feedback module is electrically connected to the input end of the output filtering module and the output end of the output filtering module, the output end of the sampling voltage stabilization feedback module is electrically connected to the input end of the sampling voltage stabilization feedback module, and the output end of the protocol module is electrically connected to the first USB port and the second USB port.

[0021] In this embodiment, the first and second USB ports are one TYPC-A port and one TYPC-C port.

[0022] Specifically, the input protection module includes a fuse with model number T2A250V.

[0023] Specifically, the input rectification filtering module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, and an inductor L2, the AC end of the bridge rectifier BD1 is electrically connected to the electric shock plug through the input protection module, the V+ end of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1 and one end of the inductor L1, the V- end of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2, the other end of the inductor L1 is electrically connected to the positive electrode of the capacitor EC2 and the input end of the RCD absorption module, and the negative electrode of the capacitor RC2 is electrically connected to the other end of the inductor L2 and grounded.

[0024] Specifically, the synchronous rectification module includes a chip U3 with model number CX7538BS.

[0025] Specifically, the sampling voltage stabilization feedback module includes a chip U1 with model number CX75GD100S, a capacitor C26, and a resistor R26.

[0026] Specifically, the protocol module includes a chip U4 with model number HUSB382.

[0027] As described above, the fast charger with dual USB ports in this embodiment is equipped with an input protection module, an input rectification filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module and a protocol module, thereby meeting the need for simultaneous charging at the highest power using dual USB ports and controlling the voltage and current when charging simultaneously using two dual USB ports, so as to improve the user experience.

[0028] Finally, it should be noted that the above embodiments are merely for illustrating the technical means of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical means of the present invention can be modified or equivalently replaced without departing from the substance and scope of the technical means of the present invention. [Explanation of symbols]

[0029] 100 Housing 101 1st USB port 102 2nd USB port 103 Electric shock plug

Claims

1. A quick charger with dual USB ports, comprising: a housing; a first USB port and a second USB port provided at one end of the housing; an electric shock plug rotatably provided at the other end of the housing; and an internal control board provided in the housing, The control board is provided with an input protection module, an input rectification filtering module, an RCD absorption module, a synchronous rectification module, an output filtering module, an auxiliary winding power supply module, a sampling voltage stabilization feedback module and a protocol 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 filtering module, the output end of the input rectification filtering module is electrically connected to the input end of the RCD absorption module, and the output end of the RCD absorption module and the input end of the auxiliary winding power supply module are respectively electrically connected to the input end of the synchronous rectification module; The output end of the synchronous rectification module is electrically connected to the input end of the output filtering module; The input end of the sampling voltage stabilization feedback module is electrically connected to the input end of the output filtering module and the output end of the output filtering module respectively; The output end of the sampling voltage stabilization feedback module is electrically connected to the input end of the sampling voltage stabilization feedback module, and the output end of the protocol module is electrically connected to the first USB port and the second USB port, respectively.

2. 2. The fast charger with dual USB ports of claim 1, wherein the input protection module includes a fuse with model number T2A250V.

3. 2. The fast charger with dual USB ports of claim 1, wherein the input rectification and filtering module includes a bridge rectifier BD1, a capacitor EC1, a capacitor EC2, an inductor L1, and an inductor L2, an AC end of the bridge rectifier BD1 is electrically connected to the electric shock plug through the input protection module, a V+ end of the bridge rectifier BD1 is electrically connected to the positive electrode of the capacitor EC1 and one end of the inductor L1, a V- end of the bridge rectifier BD1 is electrically connected to the negative electrode of the capacitor EC1 and one end of the inductor L2, and the other end of the inductor L1 is electrically connected to the positive electrode of the capacitor EC2 and the input end of the RCD absorption module, and a negative electrode of the capacitor EC2 is electrically connected to the other end of the inductor L2 and grounded.

4. 2. The fast charger with dual USB ports as claimed in claim 1, wherein the synchronous rectification module includes a chip U3 with model number CX7538BS.

5. 2. The fast charger with dual USB ports as claimed in claim 1, wherein the sampling voltage stabilization feedback module includes a chip U1 with model number CX75GD100S, a capacitor C26 and a resistor R26.

6. The fast charger with dual USB ports as claimed in claim 1 , wherein the protocol module includes a chip U4 with model number HUSB382.

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