Quick-charging charger

Abstract

The utility model discloses a fast-charging charger, and relates to the technical field of chargers. Comprising a face shell, a PCB, a pressing plate, a bottom shell, pins, screws and elastic pieces, the face shell and the bottom shell form an integral shell, the PCB is fixed in the integral shell through the pressing plate and the screws, and the bottom of the pressing plate is connected with the pins through the elastic pieces. According to the utility model, the structure design is reasonable, the power is 45W when the USB C port is independently used, the power is 45W when the USB A port is independently used, the charging current can be automatically controlled and reasonably distributed according to the electric quantity of a mobile phone and a tablet personal computer when the mobile phone and the tablet personal computer are simultaneously used, the fast charging function is realized, the general mobile phone can be fully charged in half an hour, the charging speed is fast, and the charging efficiency is high. The temperature is low, the appearance is attractive and carrying is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, and in particular to a fast charging charger. Background Art

[0002] While fast charging technology can quickly charge devices, its efficiency isn't always optimal. The fast charging process generates more heat, leading to energy loss. Furthermore, existing fast chargers typically have only one charging port, which can't meet multiple charging needs. Therefore, it's crucial to design a multifunctional fast charger that lowers temperatures and offers higher charging efficiency. Utility Model Content

[0003] To address the shortcomings of the existing technology, the present invention aims to provide a fast-charging charger with a rational structural design. It can charge 45W when using the USB C port alone and 45W when using the USB A port alone. When used simultaneously, it can automatically control and reasonably distribute the charging current according to the power levels of the mobile phone and tablet. It has a fast charging function, which can fully charge a mobile phone in half an hour. It has a fast charging speed and high efficiency. It also has a low temperature, an attractive appearance, and is easy to carry.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solution: a fast charging charger, including a face shell, a PCB board, a pressure plate, a bottom shell, pins, screws and springs. The face shell and the bottom shell constitute an integral shell. The PCB board is fixed in the integral shell by a pressure plate and screws, and the bottom of the pressure plate is connected to the pins by a spring.

[0005] Preferably, the face shell is provided with a USB A port and a USB C port.

[0006] Preferably, the pins are connected to the power supply mainboard circuit through an EMI filter circuit; the EMI filter circuit includes a common mode filter, and the pins are connected to pins 2 and 1 of the common mode filter through a fuse and a thermistor respectively, and pins 3 and 4 of the common mode filter are respectively connected to the two ends of the filter capacitor, and pin 3 of the common mode filter is connected to pin 2 of the rectifier bridge, and pin 4 of the common mode filter is connected to the positive electrode of the eighth diode, the positive electrode of the ninth diode and the 4th pin of the rectifier bridge, and the negative electrode of the eighth diode and the negative electrode of the ninth diode are connected to pin 10 of the PWM chip in the power supply mainboard circuit through the twenty-eighth resistor; the model of the PWM chip is SC3021C.

[0007] Preferably, the PWM chip is connected to the control chip and the power management chip through a transformer. The control chip model is SC3503, and the power management chip model is IP2723-TH. The power management chip is connected to the USB A port and the USB C port respectively.

[0008] The beneficial effects of this utility model are as follows: the structure design of this utility model is reasonable. When using the USB C port alone, it can provide 45W, and when using the USB A port alone, it can automatically control and reasonably distribute the charging current according to the power of the mobile phone and tablet computer. It has a fast charging function. Generally, a mobile phone can be fully charged in half an hour. The charging speed is fast and efficient. The temperature is low, the appearance is beautiful, and it is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 This is the EMI filter circuit diagram of the utility model;

[0012] Figure 3 This is the circuit diagram of the power supply mainboard of the utility model;

[0013] Figure 4 This is a circuit diagram of the connection between the power management chip of the utility model and the USB A port and USB C port. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0015] Reference Figure 1-4 This specific embodiment adopts the following technical solution: a fast charging charger, including a front shell 1, a PCB board 2, a pressure plate 3, a bottom shell 4, a pin 5, a screw 6 and a spring 7. The front shell 1 and the bottom shell 4 form an integral shell. The PCB board 2 is fixed in the integral shell by the pressure plate 3 and the screw 6. The bottom of the pressure plate 3 is connected to the pin 5 through the spring 7.

[0016] The face shell 1 is provided with a USB A port and a USB C port.

[0017] The pin 5 is connected to the power supply mainboard circuit through the EMI filter circuit; the EMI filter circuit includes a common mode filter LF1, and the pin 5 is connected to the 2nd and 1st pins of the common mode filter LF1 respectively through the fuse F1 and the thermistor RT1, the 3rd and 4th pins of the common mode filter LF1 are respectively connected to the two ends of the filter capacitor CX1, the 3rd pin of the common mode filter LF1 is connected to the 2nd pin of the rectifier bridge BD1, the 4th pin of the common mode filter LF1 is connected to the positive electrode of the eighth diode D8, the positive electrode of the ninth diode D9 and the 4th pin of the rectifier bridge BD1, the negative electrode of the eighth diode D8 and the negative electrode of the ninth diode D9 are connected to the 10th pin of the PWM chip U3 in the power supply mainboard circuit through the twenty-eighth resistor R28; the model of the PWM chip U3 is SC3021C.

[0018] The PWM chip U3 is connected to the control chip U1 and the power management chip U5 through the transformer T1. The control chip U1 model is SC3503, and the power management chip U5 model is IP2723-TH. The power management chip U5 is connected to the USB A port and the USB C port respectively.

[0019] The operating principle of this specific embodiment is as follows: AC voltage is input from both ends of the power supply pins, passing through fuse F1 and thermistor RT1. The fuse acts as a tripping device to prevent damage to downstream components, while the thermistor provides temperature protection. Bridge rectifier BD1 converts the AC voltage to DC, which is then filtered by capacitors and inductors to a DC voltage. This voltage is then applied to the transformer primary and then to pins 5 and 6 of chip U1. When the voltage on the transformer's VCC winding reaches the IC's operating voltage, the PWM chip switches the internal switch Q1 on and off, induced by the transformer secondary. This AC voltage is then converted to DC voltage through synchronous rectification and filtering, and then sent to the USB C and USB A ports via power management chip U5 to charge the phone. The power management chip and protocol chip detect and control changes in charging voltage and current.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A fast charging charger, characterized in that: The invention comprises a front shell (1), a PCB board (2), a pressure plate (3), a bottom shell (4), a pin (5), a screw (6) and a spring piece (7). The front shell (1) and the bottom shell (4) form an integral shell. The PCB board (2) is fixed in the integral shell by the pressure plate (3) and the screw (6). The bottom of the pressure plate (3) is connected to the pin (5) by the spring piece (7).

2. A fast charging charger according to claim 1, characterized in that: The surface shell (1) is provided with a USB A port and a USB C port.

3. A fast charging charger according to claim 1, characterized in that: The pin (5) is connected to the power supply mainboard circuit through an EMI filter circuit; the EMI filter circuit includes a common mode filter (LF1); the pin (5) is connected to pins 2 and 1 of the common mode filter (LF1) through a fuse (F1) and a thermistor (RT1); pins 3 and 4 of the common mode filter (LF1) are connected to two ends of a filter capacitor (CX1) respectively; pin 3 of the common mode filter (LF1) is connected to pin 2 of a rectifier bridge (BD1); pin 4 of the common mode filter (LF1) is connected to the positive electrode of an eighth diode (D8), the positive electrode of a ninth diode (D9) and the positive electrode of a rectifier bridge (BD1); the negative electrode of the eighth diode (D8) and the negative electrode of the ninth diode (D9) are connected to pin 10 of a PWM chip (U3) in the power supply mainboard circuit through a twenty-eighth resistor (R28); the model of the PWM chip (U3) is SC3021C.

4. A fast charging charger according to claim 3, characterized in that: The PWM chip (U3) is connected to the control chip (U1) and the power management chip (U5) via a transformer (T1). The control chip (U1) is SC3503, and the power management chip (U5) is IP2723-TH. The power management chip (U5) is connected to the USB A port and the USB C port, respectively.

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