High-efficiency intelligent rapid mobile phone charger

Abstract

The utility model relates to the technical field of power electronic charging, solves the technical problem of slow mobile phone charging speed caused by the fact that a charger cannot be intelligently adjusted to a mobile phone adaptive voltage in the prior art, and particularly relates to a high-efficiency intelligent fast mobile phone charger, which comprises a charging interface and an overvoltage protection circuit for protecting the charger, the intelligent rapid mobile phone charger further comprises a voltage regulation and control circuit and a temperature sensing circuit, the voltage regulation and control circuit is used for adjusting charging voltage, and the voltage regulation and control circuit is composed of a control circuit and an adjusting circuit. The control circuit is composed of a rectifying circuit, a current-limiting resistor R1, a first rectifying signal, a first primary coil, a first secondary coil, a second rectifying signal and a control diode D2, the charging voltage of the circuit is adjusted through the action of the voltage regulation and control circuit in an optocoupler mode, so that the charging voltage can realize quick charging of different mobile phones, and the charging efficiency is improved. And the safety of the battery can be improved, and the use experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of power electronics charging technology, and in particular to a high-efficiency, intelligent, fast mobile phone charger. Background Technology

[0002] A mobile phone charger, also known as a mobile phone adapter, is essentially composed of a stable power supply and necessary control circuits for constant current, voltage limiting, and time limiting. During the charging process, it provides a stable voltage, ensuring the phone is fully charged while protecting its internal components. With the increasing functionality and screen size of smartphones, users' demands for charging capabilities are also rising. However, traditional mobile phone chargers generally suffer from slow charging speeds, low charging efficiency, and excessive heat generation, failing to meet users' fast charging needs. Typically, a specific charger is required to charge a compatible phone. However, when switching phones, differences in battery compatibility can lead to low charging efficiency or excessively high voltage, damaging the battery. Long-term use can easily damage the battery, shorten its lifespan, and severely impact the user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-efficiency, intelligent, and fast mobile phone charger. It solves the technical problem that existing technologies cannot intelligently adjust the charger to adapt to the phone's voltage, resulting in slow charging speeds. This achieves the goal of adapting the charger to various mobile phones and maintaining fast charging even after changing phones.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-efficiency intelligent fast mobile phone charger, including a charging interface and an overvoltage protection circuit for protecting the charger. The intelligent fast mobile phone charger also includes a voltage regulation circuit and a temperature sensing circuit for adjusting the charging voltage.

[0005] Preferably, the voltage regulation circuit consists of a control circuit and an adjustment circuit. The control circuit consists of a rectifier circuit, a current-limiting resistor R1, a first rectified signal, a first primary coil, a first secondary coil, a second rectified signal, a control diode D2, a control chip, a data interface D+, a data interface D-, and an input voltage. The rectifier circuit outputs the first rectified signal and the second rectified signal through the current-limiting resistor R1 and the first primary coil, respectively. A voltage divider resistor R2 and a protection diode D1 are connected in parallel on both sides of the first primary coil. One end of the first secondary coil outputs the input voltage, and the other end is grounded. The first secondary coil is connected to the VSE port of the control chip through the control diode D2. The NC port and VIN port of the control chip are connected to the input voltage, respectively. The VCC port of the control chip is connected to the data interface D+, and the OUT port of the control chip is connected to the data interface D-. A filter capacitor C1 and a shunt resistor R3 are connected in parallel on both sides of the first secondary coil, respectively.

[0006] Preferably, the adjustment circuit consists of a temperature sensing signal, an adjustment chip, a current-limiting resistor R4, a second primary coil, a first MOSFET T1, a second MOSFET T2, and a photodiode Q1. The first rectified signal is connected to the drain of the first MOSFET T1, the gate of the first MOSFET T1 is connected to the SO port of the adjustment chip, the source of the first MOSFET T1 is connected to the VCC port of the adjustment chip, the second rectified signal is connected to the drain of the second MOSFET T2, the source of the second MOSFET T2 is connected to the ISE port of the adjustment chip, one end of the second primary coil is connected to the NC port of the adjustment chip through the current-limiting resistor R4, and the other end is grounded. The temperature sensing signal is connected to the VSE port of the adjustment chip, and the collector of the photodiode Q1 is connected to the VIN port of the adjustment chip.

[0007] Preferably, the temperature sensing circuit consists of a 12V built-in power supply, a threshold resistor R6, a current-limiting resistor R8, a thermistor RY, a current-limiting resistor R7, and a detector. The 12V built-in power supply is connected in series with the threshold resistor R6 and the current-limiting resistor R8 and is connected to the positive input port of the detector. The thermistor RY is connected to the negative input port of the detector through the current-limiting resistor R7. The output of the detector outputs a temperature sensing signal.

[0008] Preferably, the overvoltage protection circuit consists of a current-limiting resistor R9, a Zener diode D4, a fixed resistor R12, and an NMOS transistor Q2 connected in series. The input voltage is connected to the gate of the NMOS transistor Q2 in series with the current-limiting resistor R9, the Zener diode D4, and the fixed resistor R12. The drain of the NMOS transistor Q2 outputs the output voltage. The input voltage is connected to the source of the NMOS transistor Q2 through the fixed resistor R11. A voltage divider resistor R10 is connected in parallel between the current-limiting resistor R9 and the Zener diode D4. The voltage divider resistor R10 is connected to the base of the transistor Q3. The collector of the transistor Q3 is connected to the gate of the NMOS transistor Q2. The input voltage is connected to the emitter of the transistor Q3.

[0009] Preferably, the charging interface consists of an output voltage, a data interface D+, a data interface D-, and a ground interface.

[0010] Preferably, the control chip is model IM626 and the adjustment chip is model IM1780.

[0011] By employing the above technical solution, this utility model provides a high-efficiency, intelligent, and fast mobile phone charger, which has at least the following beneficial effects:

[0012] 1. This utility model utilizes a voltage regulation circuit to send current to a mobile phone after it is connected, thereby obtaining information such as the internal voltage and internal resistance of the phone. The control chip then calculates the appropriate voltage, and the input voltage is adjusted by an optocoupler-controlled adjustment circuit. This allows the charging voltage to meet the needs of various battery models, achieving fast charging even after battery replacement, ensuring battery safety, and improving the user experience.

[0013] 2. This utility model, through the combined function of a temperature sensing circuit and an overvoltage protection circuit, can protect the battery from overheating and excessive voltage during charging, ensuring that the battery remains at a normal temperature and charges stably during the charging process. This increases the safety of the charger, extends the battery's lifespan, and reduces the probability of battery damage caused by high temperature and high voltage during mobile phone charging. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a structural block diagram of a high-efficiency intelligent fast mobile phone charger according to the present invention;

[0016] Figure 2 This is a circuit diagram of the voltage regulation circuit of this utility model;

[0017] Figure 3 This is a circuit diagram of the control circuit of this utility model;

[0018] Figure 4 This is a circuit diagram of the adjustment circuit of this utility model;

[0019] Figure 5 This is a circuit diagram of the temperature sensing circuit of this utility model;

[0020] Figure 6 This is the circuit diagram of the overvoltage protection circuit of this utility model.

[0021] In the diagram: 1. Voltage regulation circuit; 11. Control circuit; 12. Adjustment circuit; 2. Temperature sensing circuit; 3. Overvoltage protection circuit; 4. Charging interface. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. This will allow for a full understanding and implementation of how this application uses technical means to solve technical problems and achieve technical effects.

[0023] Due to the technical issue that current technology cannot intelligently adjust the charger to match the phone's voltage, resulting in slow charging speeds, please refer to [the relevant documentation / reference]. Figures 1-6This embodiment provides a high-efficiency intelligent fast mobile phone charger that can be adapted to various mobile phones through charger adjustments, and still charges quickly after changing phones. The charger includes a charging interface 4 and an overvoltage protection circuit 3 for protecting the charger. The intelligent fast mobile phone charger also includes a voltage regulation circuit 1 and a temperature sensing circuit 2 for adjusting the charging voltage. The voltage regulation circuit 1 consists of a control circuit 11 and an adjustment circuit 12. The control circuit 11 consists of a rectifier circuit, a current-limiting resistor R1, a first rectified signal, a first primary coil, a second primary coil, a second rectified signal, a control diode D2, a control chip, a data interface D+, a data interface D-, and an input voltage. The rectifier circuit outputs the first rectified signal and the second rectified signal through the current-limiting resistor R1 and the first primary coil, respectively. A voltage divider resistor R2 and a protection diode D1 are connected in parallel on both sides of the first primary coil. One end of the first primary coil outputs the input voltage, and the other end is grounded. The first primary coil is connected to the VSE port of the control chip through the control diode D2. The NC port and VIN port of the control chip are respectively connected to the input voltage. The VCC port of the chip is connected to the data interface D+, and the OUT port of the control chip is connected to the data interface D-. A filter capacitor C1 and a shunt resistor R3 are connected in parallel on both sides of the primary coil. The adjustment circuit 12 consists of a temperature sensing signal, an adjustment chip, a current-limiting resistor R4, a second primary coil, a first MOSFET T1, a second MOSFET T2, and a photodiode Q1. The first rectified signal is connected to the drain of the first MOSFET T1, the gate of the first MOSFET T1 is connected to the SO port of the adjustment chip, and the source of the first MOSFET T1 is connected to the VCC port of the adjustment chip. The CC port connects the second rectified signal to the drain of the second MOSFET T2, the source of the second MOSFET T2 connects to the ISE port of the adjustment chip, one end of the second primary coil connects to the NC port of the adjustment chip through the current limiting resistor R4, and the other end is grounded. The temperature sensing signal connects to the VSE port of the adjustment chip, and the collector of the light-controlled diode Q1 connects to the VIN port of the adjustment chip. The charging interface 4 consists of the output voltage, data interface D+, data interface D-, and ground interface. The control chip is model IM626, and the adjustment chip is model IM1780.

[0024] In this invention, the two core chips are the control chip iW626 and the adjustment chip iW1780, each performing different functions. The iW626, acting as the AC / DC secondary-side controller, is primarily responsible for receiving input from an external power source and, as needed, converting the light signal into voltage and current via optocoupler (i.e., by controlling diode D2 to emit light, and photodiode Q1 receiving the light signal). The iW1780, acting as the main controller, receives the optocoupled light signal from the iW626 and adjusts the output voltage and current according to its built-in intelligent algorithm to meet the fast and safe charging requirements of mobile phones. Before use, the iW626 obtains the specific information about the mobile phone battery through the charging interface 4 and determines the optimal charging voltage. Then, it controls the adjustment circuit 12 to adjust the external voltage, achieving fast charging for different mobile phone models.

[0025] The data interface ports D+ and D- are used for data transmission. These ports enable the charger to communicate with the mobile phone and obtain the phone's battery status information in real time, thereby controlling the charging process more accurately. In addition, the circuit has an input voltage and a ground port, which are used to output the converted voltage and provide a ground reference, respectively. The converted voltage enters the overvoltage protection circuit 3 and generates an input voltage to charge the mobile phone. The data interface ports D+ and D-, the ground port, and the output voltage of the overvoltage protection circuit 3 together constitute the charging interface 4.

[0026] Because the charger itself can easily overheat due to voltage and current during mobile phone charging, this can damage its use and lifespan. Please refer to [the relevant documentation / reference]. Figure 5 The temperature sensing circuit 2 consists of a 12V built-in power supply, a threshold resistor R6, a current-limiting resistor R8, a thermistor RY, a current-limiting resistor R7, and a detector. The 12V built-in power supply is connected in series with the threshold resistor R6 and the current-limiting resistor R8 and then connected to the positive input port of the detector. The thermistor RY is connected to the negative input port of the detector through the current-limiting resistor R7. The output of the detector outputs a temperature sensing signal.

[0027] In this invention, the current threshold corresponding to the temperature is adjusted by a threshold rheostat R6. As the temperature changes, the resistance of the thermistor RY gradually changes, thus affecting the current magnitude. The detector compares the two currents and then sends a temperature sensing signal. The thermistor is an NTC type thermistor. The higher the temperature, the lower the resistance of the thermistor RY and the larger the current. If the current of the thermistor RY is too large and exceeds the current threshold adjusted by the threshold rheostat R6, it indicates that the temperature is too high and dangerous for the charger. The temperature sensing signal is then output to the adjustment chip, which reduces the voltage or directly cuts off the power to ensure the safety of the charger. Through the function of the temperature sensing circuit 2, the charger can be kept within a reasonable temperature range, avoiding circuit damage caused by overheating and improving the safety of the charger.

[0028] Because voltage instability can easily occur during charging, excessively high voltage can damage the phone. Please refer to [the relevant instructions]. Figure 6 The overvoltage protection circuit 3 consists of a current-limiting resistor R9, a Zener diode D4, a fixed resistor R12, and an NMOS transistor Q2 connected in series. The input voltage is connected to the gate of the NMOS transistor Q2 in series with the current-limiting resistor R9, the Zener diode D4, and the fixed resistor R12. The drain of the NMOS transistor Q2 outputs the voltage. The input voltage is connected to the source of the NMOS transistor Q2 through the fixed resistor R11. A voltage divider resistor R10 is connected in parallel between the current-limiting resistor R9 and the Zener diode D4. The voltage divider resistor R10 is connected to the base of the transistor Q3. The collector of the transistor Q3 is connected to the gate of the NMOS transistor Q2. The input voltage is connected to the emitter of the transistor Q3.

[0029] In this invention, the NMOS transistor Q2 controls the output voltage supply to the mobile phone battery. Combined with a current-limiting resistor R9, a fixed resistor R12, a Zener diode D4, and a transistor Q3, abnormal voltages can be detected. When the supply voltage is less than 5.1V (e.g., at 5V), the Zener diode D4's turn-on voltage is 5.1V, so it does not conduct. Consequently, transistor Q3 does not conduct, and the gate of NMOS transistor Q2 is pulled to 0V by the fixed resistor R12, turning on Q2 and outputting 5V. If the supply voltage is around 5.3V, the Zener diode D4's turn-on voltage is 5.1V, so it conducts. The emitter voltage of transistor Q3 is 5.3V, and the base voltage is 5.1V, so Q3 still does not conduct, and NMOS transistor Q2 will operate normally. The output voltage is approximately 5.3V. If the supply voltage is 5.9V, the Zener diode D4 turns on at 5.1V, thus conducting. The voltage drop across the current-limiting resistor R9 is approximately 0.8V, which can be adjusted based on the resistor. The emitter voltage of transistor Q3 is 5.9V, and the base voltage is 5.3V, therefore transistor Q3 is conducting. The gate voltage of NMOS transistor Q2 becomes 5.9V, therefore NMOS transistor Q2 does not conduct, resulting in no output voltage. Through the overvoltage protection circuit, when the charging voltage becomes unstable during the charging process of the mobile phone battery, the charging voltage can be cut off in time, protecting the mobile phone battery from the influence of unstable voltage. At the same time, the structure of the overvoltage protection circuit is simplified, reducing costs and making repair and maintenance more convenient. The mobile phone battery is better protected, extending its service life.

[0030] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Since the above embodiments are substantially similar to the method embodiments, their descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0031] The above embodiments provide a detailed description of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A high-efficiency intelligent fast mobile phone charger, comprising a charging interface (4) and an overvoltage protection circuit (3) for protecting the charger, characterized in that, The smart fast mobile phone charger also includes a voltage regulation circuit (1) and a temperature sensing circuit (2) for adjusting the charging voltage. The voltage regulation circuit (1) consists of a control circuit (11) and an adjustment circuit (12). The control circuit (11) consists of a rectifier circuit, a current-limiting resistor R1, a first rectifier signal, a first primary coil, a first secondary coil, a second rectifier signal, a control diode D2, a control chip, a data interface D+, a data interface D-, and an input voltage. The rectifier circuit outputs the first rectifier signal and the second rectifier signal through the current-limiting resistor R1 and the first primary coil, respectively. The two sides of the first primary coil are connected in parallel with a series-connected voltage divider resistor R2 and a protection diode D1. One end of the first secondary coil outputs the input voltage, and the other end is grounded. The first secondary coil is connected to the VSE port of the control chip through the control diode D2. The NC port and VIN port of the control chip are connected to the input voltage, respectively. The VCC port of the control chip is connected to the data interface D+, and the OUT port of the control chip is connected to the data interface D-. The two sides of the first secondary coil are connected in parallel with a filter capacitor C1 and a shunt resistor R3, respectively.

2. The high-efficiency intelligent fast mobile phone charger according to claim 1, characterized in that, The adjustment circuit (12) consists of a temperature sensing signal, an adjustment chip, a current-limiting resistor R4, a second primary coil, a first MOSFET T1, a second MOSFET T2, and a photodiode Q1. The first rectified signal is connected to the drain of the first MOSFET T1, the gate of the first MOSFET T1 is connected to the SO port of the adjustment chip, the source of the first MOSFET T1 is connected to the VCC port of the adjustment chip, the second rectified signal is connected to the drain of the second MOSFET T2, the source of the second MOSFET T2 is connected to the ISE port of the adjustment chip, one end of the second primary coil is connected to the NC port of the adjustment chip through the current-limiting resistor R4, and the other end is grounded. The temperature sensing signal is connected to the VSE port of the adjustment chip, and the collector of the photodiode Q1 is connected to the VIN port of the adjustment chip.

3. The high-efficiency intelligent fast mobile phone charger according to claim 1, characterized in that, The temperature sensing circuit (2) consists of a 12V built-in power supply, a threshold resistor R6, a current-limiting resistor R8, a thermistor RY, a current-limiting resistor R7, and a judgment unit. The 12V built-in power supply is connected in series with the threshold resistor R6 and the current-limiting resistor R8 and connected to the positive input port of the judgment unit. The thermistor RY is connected to the negative input port of the judgment unit through the current-limiting resistor R7. The output terminal of the judgment unit outputs a temperature sensing signal.

4. A high-efficiency intelligent fast mobile phone charger according to claim 1, characterized in that, The overvoltage protection circuit (3) consists of a current-limiting resistor R9, a Zener diode D4, a fixed resistor R12, and an NMOS transistor Q2 connected in series. The input voltage is connected to the gate of the NMOS transistor Q2 in series with the current-limiting resistor R9, the Zener diode D4, and the fixed resistor R12. The drain of the NMOS transistor Q2 outputs the output voltage. The input voltage is connected to the source of the NMOS transistor Q2 through the fixed resistor R11. A voltage divider resistor R10 is connected in parallel between the current-limiting resistor R9 and the Zener diode D4. The voltage divider resistor R10 is connected to the base of the transistor Q3. The collector of the transistor Q3 is connected to the gate of the NMOS transistor Q2. The input voltage is connected to the emitter of the transistor Q3.

5. A high-efficiency intelligent fast mobile phone charger according to claim 1, characterized in that, The charging interface (4) consists of an output voltage, a data interface D+, a data interface D-, and a ground interface.

6. A high-efficiency intelligent fast mobile phone charger according to claim 2, characterized in that, The control chip is model IM626, and the adjustment chip is model IM1780.

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