Charging head with PWM anti-interference function
By introducing components such as an input protection module and specific chips into the charging head, the problem of poor charging performance in electromagnetic radiation areas has been solved, achieving more efficient and stable charging performance.
Patent Information
- Application Number
- CN202423212512.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing chargers lack anti-interference capabilities when charging in areas with high electromagnetic radiation, which affects the charging performance of electronic devices.
Design a charging head with PWM anti-interference function, including an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module. Utilize chips of model JW15156F, JW7726HAD, and HUSB381 to improve EMI performance.
It improves the working efficiency and stability of the charging head in electromagnetic interference environments, ensuring the charging effect of electronic devices.
Smart Images
Figure CN223872209U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging head technology, specifically to a charging head with PWM anti-interference function. Background Technology
[0002] Currently, electronic devices (such as mobile phones) can be charged using USB chargers. As a crucial component of chargers, switching power supplies typically employ maximum frequency clamping to limit their operating frequency range. However, most chargers lack anti-interference capabilities, which can negatively impact charging performance in areas with high electromagnetic radiation. Summary of the Invention
[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a charging head with PWM anti-interference function. By setting the anti-interference function, the working efficiency can be improved when there is a large amount of interference, and the stability during use can be improved.
[0004] This utility model is achieved through the following technical solution:
[0005] A charging head with PWM anti-interference function includes a shell, a USB interface disposed at one end of the shell, a contact plug rotatably disposed at the other end of the shell, and a control board disposed inside the shell. The control board includes an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module.
[0006] The input terminal of the input protection module is electrically connected to the contact plug, and the output terminal of the input protection module is electrically connected to the input terminal of the AC rectifier and filter module.
[0007] The first output terminal of the AC rectifier and filter module is electrically connected to the input terminal of the PWM control module. The output terminal of the PWM control module and the second output terminal of the AC rectifier and filter module are electrically connected to the input terminal of the output synchronous rectifier and filter module through the transformer module. The output terminal of the output synchronous rectifier and filter module is electrically connected to the USB interface through the protocol control module.
[0008] The control board further includes a feedback module, the input of which is electrically connected to the output of the output synchronous rectification and filtering module, and the output of which is electrically connected to the protocol module.
[0009] The PWM control module includes a chip U3 with model number JW15156F.
[0010] The output synchronous rectification and filtering module includes a chip U4 with model number JW7726HAD.
[0011] The protocol control module includes a chip U1 with model number HUSB381.
[0012] The beneficial effects of this utility model are:
[0013] This utility model discloses a charging head with PWM anti-interference function. It is equipped with an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module. The PWM control module improves the EMI performance of the control board to cope with the high interference and improve the working efficiency and stability during use. Attached Figure Description
[0014] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0016] Figure 2 This is the circuit schematic diagram of this utility model.
[0017] Figure Labels
[0018] Casing--100, USB interface--101, contact plug--102. Detailed Implementation
[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0022] Currently, electronic devices (such as mobile phones) can be charged using USB chargers. As a crucial component of chargers, switching power supplies typically employ maximum frequency clamping to limit their operating frequency range. However, most chargers lack anti-interference capabilities, which can negatively impact charging performance in areas with high electromagnetic radiation.
[0023] To address the aforementioned issues, this embodiment discloses a charging head with PWM anti-interference function, the structure of which is as follows: Figure 1 As shown, the charging head includes a housing 100, a USB interface 101 disposed at one end of the housing 100, a contact plug 102 rotatably disposed at the other end of the housing 100, and a control board disposed inside the housing 100. In this embodiment, the USB interface 101 is preferably a TYPE-C interface.
[0024] The circuit diagram of the control board of the charging head in this embodiment is as follows: Figure 2As shown, the control board includes an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module. The input terminal of the input protection module is electrically connected to the contact plug 102, and the output terminal of the input protection module is electrically connected to the input terminal of the AC rectification and filtering module. The first output terminal of the AC rectification and filtering module is electrically connected to the input terminal of the PWM control module. The output terminal of the PWM control module and the second output terminal of the AC rectification and filtering module are electrically connected to the input terminal of the output synchronous rectification and filtering module through the transformer module. The output terminal of the output synchronous rectification and filtering module is electrically connected to the USB interface 101 through the protocol control module.
[0025] Specifically, the control board also includes a feedback module, the input of which is electrically connected to the output of the output synchronous rectification and filtering module, and the output of which is electrically connected to the protocol module.
[0026] Specifically, the PWM control module includes a chip U3 with model number JW15156F.
[0027] Specifically, the output synchronous rectification and filtering module includes a chip U4 with the model number JW7726HAD.
[0028] Specifically, the protocol control module includes a chip U1 with the model number HUSB381.
[0029] This embodiment of a charging head with PWM anti-interference function includes an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module. The PWM control module improves the EMI performance of the control board to cope with high interference and enhances working efficiency and stability during use.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A charging head with PWM anti-interference function, comprising a housing, a USB interface disposed at one end of the housing, a contact plug rotatably disposed at the other end of the housing, and a control board disposed within the housing, characterized in that, The control board is equipped with an input protection module, an AC rectification and filtering module, a transformer module, a synchronous rectification module, an output synchronous rectification and filtering module, a PWM control module, and a protocol control module. The input terminal of the input protection module is electrically connected to the contact plug, and the output terminal of the input protection module is electrically connected to the input terminal of the AC rectifier and filter module. The first output terminal of the AC rectifier and filter module is electrically connected to the input terminal of the PWM control module. The output terminal of the PWM control module and the second output terminal of the AC rectifier and filter module are electrically connected to the input terminal of the output synchronous rectifier and filter module through the transformer module. The output terminal of the output synchronous rectifier and filter module is electrically connected to the USB interface through the protocol control module.
2. A charging head with PWM anti-interference function according to claim 1, characterized in that, The control board also includes a feedback module, the input of which is electrically connected to the output of the output synchronous rectification and filtering module, and the output of which is electrically connected to the protocol module.
3. A charging head with PWM anti-interference function according to claim 1, characterized in that, The PWM control module includes a chip U3 with model number JW15156F.
4. A charging head with PWM anti-interference function according to claim 1, characterized in that, The output synchronous rectification and filtering module includes a chip U4 with model number JW7726HAD.
5. A charging head with PWM anti-interference function according to claim 1, characterized in that, The protocol control module includes a chip U1 with model number HUSB381.