Quick charging circuit for mobile equipment
By integrating the fast charging protocol into the U4 fast charging chip and using high-frequency switching processing of the current preprocessing unit and transformer unit, the problem of slow charging speed of mobile devices is solved, achieving fast charging and improving the user experience.
Patent Information
- Application Number
- CN202520281873.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Current technologies result in slow charging speeds for mobile devices, leading to excessively long waiting times for users and negatively impacting the user experience.
It adopts the U4 fast charging chip that integrates the fast charging protocol, and improves the charging speed through the transformation and high-frequency switching of the current preprocessing unit and the transformer unit.
It enables fast charging for mobile devices, improving the user experience.
Smart Images
Figure CN223744419U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fast charging technical field especially relates to a mobile device fast charging circuit. BACKGROUND
[0002] The charger plays the role of charging the mobile device, so that the mobile device has enough power to run.
[0003] In the related art, the charging speed of the mobile device is slow, which leads to the user needing to wait for a long time, thereby affecting the user experience. UTILITY MODEL CONTENT
[0004] The utility model aims at overcoming the insufficient in prior art, provide a kind of mobile device fast charging circuit, can improve the charging speed of mobile device, to improve user experience.
[0005] The utility model aims at overcoming the insufficient in prior art, provide a kind of mobile device fast charging circuit, can improve the charging speed of mobile device, to improve user experience.
[0006] The first aspect of the application provides a kind of mobile device fast charging circuit, comprising: power input module, including current preprocessing unit and voltage conversion unit, the current preprocessing unit with the voltage conversion unit electric connection;Charging module, including fast charging chip U4 and plug-in port, the fast charging chip U4 with the voltage conversion unit electric connection, the plug-in port with the fast charging chip U4 electric connection.
[0007] The current preprocessing unit includes fuse F1, thermistor NTC and capacitor X1, the fuse F1 with the first end of the capacitor X1 electric connection, the second end of the capacitor X1 with the thermistor NTC electric connection.
[0008] The current preprocessing unit further includes resistance R22, resistance R23, resistance R24, resistance R21 and rectifier BD1, the first end of the resistance R22 with the first end of the capacitor X1 electric connection, the second end of the resistance R22 with the first end of the resistance R23 electric connection, the second end of the resistance R23 with the second end of the capacitor X1 electric connection, the first end of the resistance R24 with the first end of the resistance R22 electric connection, the second end of the resistance R24 with the first end of the resistance R21 electric connection, the second end of the resistance R21 with the second end of the resistance R23 electric connection, the rectifier BD1 is respectively connected with the first end of the resistance R24 and the second end of the resistance R21 electric connection.
[0009] The current preprocessing unit further includes a capacitor EC1, an inductor L1 and a capacitor EC2, a first end of the capacitor EC1 is electrically connected with the rectifier BD1, a second end of the capacitor EC1 is grounded, a first end of the inductor L1 is electrically connected with the first end of the capacitor EC1, a second end of the inductor L1 is electrically connected with a first end of the capacitor EC2, and a second end of the capacitor EC2 is grounded.
[0010] The voltage transformation unit includes a capacitor C9 and a chip U1B, a first end of the capacitor C9 is electrically connected with the rectifier BD1, and a second end of the capacitor C9 is electrically connected with the chip U1B.
[0011] The voltage transformation unit further includes a resistor R9 and a MOS tube Q1B, a first end of the resistor R9 is electrically connected with the chip U1B, and a second end of the resistor R9 is electrically connected with the MOS tube Q1B.
[0012] The voltage transformation unit further includes a transformer TIB and a resistor R11, the transformer TIB is electrically connected with a first end of the resistor R11, and a second end of the resistor R11 is electrically connected with the chip U1B.
[0013] The voltage transformation unit further includes a transformer T1A, a resistor R14 and a resistor R15, the transformer T1A is electrically connected with the MOS tube Q1B, a first end of the resistor R15 is electrically connected with the transformer T1A, and a second end of the resistor R15 is electrically connected with a first end of the resistor R14.
[0014] The voltage transformation unit further includes a capacitor C13 and a resistor R28, a first end of the capacitor C13 is electrically connected with a second end of the resistor R14, a second end of the capacitor C13 is electrically connected with a first end of the resistor R28, and a second end of the resistor R28 is electrically connected with the fast charging chip U4.
[0015] The charging module further includes a resistor R35, a resistor R36, a resistor R37 and a resistor R38, a first end of the resistor R35 is electrically connected with the fast charging chip U4, a second end of the resistor R35 is electrically connected with the plug-in port, a first end of the resistor R36 is electrically connected with the fast charging chip U4, a second end of the resistor R36 is electrically connected with the plug-in port, a first end of the resistor R37 is electrically connected with the fast charging chip U4, a second end of the resistor R37 is electrically connected with the plug-in port, a first end of the resistor R38 is electrically connected with the fast charging chip U4, and a second end of the resistor R38 is electrically connected with the plug-in port.
[0016] Compared with the prior art, the utility model has at least the following advantages:
[0017] The fast charging chip U4 of the application integrates a fast charging protocol, and through voltage conversion and high-frequency switching processing of a current preprocessing unit and a voltage conversion unit, the fast charging chip U4 outputs the wattage of fast charging to the plug-in port, thereby improving the charging speed. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows.
[0019] Figure 1 The functional module diagram of the mobile device fast charging circuit in an embodiment of the present application is shown in the figure.
[0020] Figure 2 The circuit diagram of the mobile device fast charging circuit in an embodiment of the present application is shown in the figure.
[0021] Figure 3 The circuit diagram of another embodiment of the mobile device fast charging circuit in an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION
[0022] The embodiments of the present application will be described in more detail with reference to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0023] It should be understood that although the terms "first", "second", "third" and the like can be used to describe various information in the present application, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.
[0024] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected or integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] Please refer toFigure 1 、 Figure 2 and Figure 3 A mobile device fast charging circuit, comprising: a power input module 100 and a charging module 200, the power input module 100 comprising a current preprocessing unit and a voltage conversion unit, the current preprocessing unit being electrically connected with the voltage conversion unit; the charging module 200 comprising a fast charging chip U4 and a plug-in port, the fast charging chip U4 being electrically connected with the voltage conversion unit, and the plug-in port being electrically connected with the fast charging chip U4.
[0026] It should be noted that the model of the fast charging chip U4 can be IP2726, which integrates the PD / QC fast charging protocol, and the plug-in port can be a TYPE-C interface.
[0027] The fast charging chip U4 of the present application integrates the fast charging protocol, and through the voltage conversion and high-frequency switching processing of the current preprocessing unit and the voltage conversion unit, the fast charging chip U4 outputs the wattage of fast charging to the plug-in port, thereby improving the charging speed.
[0028] Please refer to Figure 2 In an embodiment, the current preprocessing unit comprises a fuse F1, a thermistor NTC, and a capacitor X1, the fuse F1 being electrically connected with a first end of the capacitor X1, and a second end of the capacitor X1 being electrically connected with the thermistor NTC.
[0029] It should be noted that a large inrush current will be generated at the moment of connection of the power circuit, which may cause damage to the circuit elements. When the thermistor NTC is connected in series with the fuse F1 in the circuit, the thermistor NTC can effectively suppress the inrush current at the moment of starting. With the passage of current, the thermistor NTC rapidly decreases in resistance due to its own heating, and the influence on the normal working current is reduced. The capacitor X1 plays a filtering role.
[0030] Please refer to Figure 2 In an embodiment, the current preprocessing unit further comprises a resistor R22, a resistor R23, a resistor R24, a resistor R21, and a rectifier BD1, a first end of the resistor R22 being electrically connected with a first end of the capacitor X1, a second end of the resistor R22 being electrically connected with a first end of the resistor R23, a second end of the resistor R23 being electrically connected with a second end of the capacitor X1, a first end of the resistor R24 being electrically connected with the first end of the resistor R22, a second end of the resistor R24 being electrically connected with a first end of the resistor R21, a second end of the resistor R21 being electrically connected with the second end of the resistor R23, and the rectifier BD1 being electrically connected with the first end of the resistor R24 and the second end of the resistor R21, respectively.
[0031] It should be noted that the resistor R22, the resistor R23, the resistor R24, and the resistor R21 are current limiting resistors, and the rectifier BD1 is used to convert alternating current into direct current.
[0032] Please see Figure 2 In one embodiment, the current preprocessing unit further includes a capacitor EC1, an inductor L1, and a capacitor EC2. The first terminal of capacitor EC1 is electrically connected to rectifier BD1, and the second terminal of capacitor EC1 is grounded. The first terminal of inductor L1 is electrically connected to the first terminal of capacitor EC1, and the second terminal of inductor L1 is electrically connected to the first terminal of capacitor EC2. The second terminal of capacitor EC2 is grounded.
[0033] It should be noted that capacitor EC1, inductor L1, and capacitor EC2 form a filter circuit for filtering.
[0034] Please see Figure 2 In one embodiment, the transformer unit includes a capacitor C9 and a chip U1B. The first end of the capacitor C9 is electrically connected to the rectifier BD1, and the second end of the capacitor C9 is electrically connected to the chip U1B.
[0035] It should be noted that capacitor C9 is a filter capacitor, and chip U1B is a PWM chip.
[0036] Please see Figure 2 In one embodiment, the transformer unit further includes a resistor R9 and a MOSFET Q1B. The first end of the resistor R9 is electrically connected to the chip U1B, and the second end of the resistor R9 is electrically connected to the MOSFET Q1B.
[0037] It should be noted that resistor R9 is a voltage divider resistor.
[0038] Please see Figure 2 and Figure 3 In one embodiment, the transformer unit further includes a transformer TIB and a resistor R11. The transformer TIB is electrically connected to the first terminal of the resistor R11, and the second terminal of the resistor R11 is electrically connected to the chip U1B. Specifically, the transformer unit also includes a transformer T1A, a resistor R14, and a resistor R15. The transformer T1A is electrically connected to the MOSFET Q1B, the first terminal of the resistor R15 is electrically connected to the transformer T1A, and the second terminal of the resistor R15 is electrically connected to the first terminal of the resistor R14. Specifically, the transformer unit also includes a capacitor C13 and a resistor R28. The first terminal of the capacitor C13 is electrically connected to the second terminal of the resistor R14, the second terminal of the capacitor C13 is electrically connected to the first terminal of the resistor R28, and the second terminal of the resistor R28 is electrically connected to the fast charging chip U4.
[0039] It should be noted that transformers T1A and T1B are both used to change voltage, and resistors R11, R14, and R15 are all current-limiting resistors.
[0040] Please see Figure 3In an embodiment, the charging module 200 further comprises resistors R35, R36, R37 and R38, a first end of the resistor R35 is electrically connected with the fast charging chip U4, a second end of the resistor R35 is electrically connected with the plug-in port, a first end of the resistor R36 is electrically connected with the fast charging chip U4, a second end of the resistor R36 is electrically connected with the plug-in port, a first end of the resistor R37 is electrically connected with the fast charging chip U4, a second end of the resistor R37 is electrically connected with the plug-in port, a first end of the resistor R38 is electrically connected with the fast charging chip U4, and a second end of the resistor R38 is electrically connected with the plug-in port.
[0041] It should be noted that the resistors R35, R36, R37 and R38 are current limiting resistors.
[0042] The circuit principle of the present application is described as follows:
[0043] First, the external power supply inputs 100V-240V alternating voltage, which is rectified into a pulsating direct current voltage by the fuse F1, the thermistor NTC and the capacitor X1 to the rectifier BD1. Then, the capacitor EC1, the inductor L1 and the capacitor EC2 are used to filter the 150V-300V direct current voltage. Then, the MOS unit in the MOS tube Q1B is driven by the PWM unit of the chip U1B, so that the seventh and eighth pins of the transformer T1A generate 30KHZ-100KHZ high-frequency pulses, and at the same time, the third and fourth pins of the transformer T1B induce low-voltage alternating current, which is rectified to 8V-40V direct current voltage by the diode D4, and then filtered by the capacitor EC3, and output to the VCC pin of the chip U1B for power supply. Then, the fifth and sixth pins of the transformer induce low-voltage alternating voltage, which is rectified by the chip U3, and then filtered by the capacitor EC4 to output a smooth low-voltage current voltage to the chip U4 and the MOS tube Q1B. Finally, since the chip U4 integrates the PD / QC fast charging protocol, when the plug-in port is connected to the mobile device for charging, the protocol will handshake with the mobile device through the CC1, CC2, DM1 and DP1 of the plug-in port. After the handshake is successful, the MOS tube Q1B is turned on, and the chip U4 will feed back the charging voltage required by the device to the chip U1B through the FB pin, and the chip U1B adjusts the transformer output voltage by adjusting the duty cycle, and then the voltage is stabilized by the programmable reference voltage source TL431, and then the MOS tube Q1B is connected to the VBUS pin of the plug-in port to charge the mobile device.
[0044] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above examples, the description of each example is focused on respectively, and the parts not described in detail in a certain example can be referred to the relevant description of other examples. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method of the embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device of the embodiments of the present application can be combined, divided and reduced according to actual needs.
[0045] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical application or improvement of technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.
Claims
1. A mobile device fast charging circuit, comprising: The utility model relates to a power supply input module, including current preprocessing unit and voltage transformation unit, current preprocessing unit with voltage transformation unit electricity connects; The charging module includes a fast charging chip U4 and a plug-in port, the fast charging chip U4 is electrically connected with the voltage transformation unit, and the plug-in port is electrically connected with the fast charging chip U4. The current preprocessing unit includes a fuse F1, a thermistor NTC and a capacitor X1, the fuse F1 is electrically connected with the first end of the capacitor X1, and the second end of the capacitor X1 is electrically connected with the thermistor NTC.
2. The mobile device fast charging circuit of claim 1, wherein, The current preprocessing unit further includes a resistor R22, a resistor R23, a resistor R24, a resistor R21 and a rectifier BD1, the first end of the resistor R22 is electrically connected with the first end of the capacitor X1, the second end of the resistor R22 is electrically connected with the first end of the resistor R23, the second end of the resistor R23 is electrically connected with the second end of the capacitor X1, the first end of the resistor R24 is electrically connected with the first end of the resistor R22, the second end of the resistor R24 is electrically connected with the first end of the resistor R21, the second end of the resistor R21 is electrically connected with the second end of the resistor R23, and the rectifier BD1 is respectively electrically connected with the first end of the resistor R24 and the second end of the resistor R21.
3. The mobile device fast charging circuit of claim 2, wherein, The current preprocessing unit further includes a capacitor EC1, an inductor L1 and a capacitor EC2, the first end of the capacitor EC1 is electrically connected with the rectifier BD1, the second end of the capacitor EC1 is grounded, the first end of the inductor L1 is electrically connected with the first end of the capacitor EC1, the second end of the inductor L1 is electrically connected with the first end of the capacitor EC2, and the second end of the capacitor EC2 is grounded.
4. The mobile device fast charging circuit of claim 3, wherein, The voltage transformation unit includes a capacitor C9 and a chip U1B, the first end of the capacitor C9 is electrically connected with the rectifier BD1, and the second end of the capacitor C9 is electrically connected with the chip U1B.
5. The mobile device fast charging circuit of claim 1, wherein, The voltage transformation unit further includes a resistor R9 and a MOS tube Q1B, the first end of the resistor R9 is electrically connected with the chip U1B, and the second end of the resistor R9 is electrically connected with the MOS tube Q1B.
6. The mobile device fast charging circuit of claim 5, wherein, The voltage transformation unit further includes a transformer TIB and a resistor R11, the transformer TIB is electrically connected with the first end of the resistor R11, and the second end of the resistor R11 is electrically connected with the chip U1B.
7. The mobile device fast charging circuit of claim 6, wherein, The voltage transformation unit further includes a transformer T1A, a resistor R14 and a resistor R15, the transformer T1A is electrically connected with the MOS tube Q1B, the first end of the resistor R15 is electrically connected with the transformer T1A, the second end of the resistor R15 is electrically connected with the first end of the resistor R14.
8. The mobile device fast charging circuit of claim 6, wherein, The voltage transformation unit further includes a capacitor C13 and a resistor R28, the first end of the capacitor C13 is electrically connected with the second end of the resistor R14, the second end of the capacitor C13 is electrically connected with the first end of the resistor R28, and the second end of the resistor R28 is electrically connected with the fast charging chip U4.
9. The mobile device fast charging circuit of claim 8, wherein, 10. The mobile device fast charging circuit of claim 1, wherein, The charging module further comprises resistors R35, R36, R37 and R38, a first end of the resistor R35 is electrically connected with the fast charging chip U4, a second end of the resistor R35 is electrically connected with the plug-in port, a first end of the resistor R36 is electrically connected with the fast charging chip U4, a second end of the resistor R36 is electrically connected with the plug-in port, a first end of the resistor R37 is electrically connected with the fast charging chip U4, a second end of the resistor R37 is electrically connected with the plug-in port, a first end of the resistor R38 is electrically connected with the fast charging chip U4, and a second end of the resistor R38 is electrically connected with the plug-in port.