An adaptive PDO fast charging power supply circuit and charger

Abstract

This utility model discloses an adaptive PDO fast charging power supply circuit and charger. A protocol chip receives GPIO signals and controls the PDO output voltage at the output port. One end of the input circuit can be electrically connected to a wide-voltage AC mains circuit, and the other end is connected to a voltage conversion circuit. The voltage conversion circuit converts the input voltage to a wide-voltage AC mains circuit and then to a specified voltage output sampling circuit. The secondary winding of the voltage conversion circuit samples the input voltage and transmits the voltage information to the protocol chip via GPIO lines. The output port is used to electrically connect to external devices and provide them with a specified output voltage for charging. The circuit of this application meets safety and temperature standards without increasing size, and is more suitable for domestic and international application scenarios. This adaptive PDO fast charging 100W power supply circuit samples the input voltage through transformer T1A, generates GPIO signals to the protocol chip, and thus changes the PDO, achieving adaptive PDO for high and low voltage inputs. This enables domestic compatibility with international voltage applications and reduces the size of existing market products.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuits, specifically to an adaptive PDO fast charging power supply circuit and charger. Background Technology

[0002] With the increasing number of portable electronic devices, the charging speed of these devices greatly affects the consumer experience. High-power multi-port fast charging is suitable for the charging scenarios of computers, mobile phones, headphones, etc. that people currently carry, greatly solving the problem of carrying multiple chargers for consumers.

[0003] PDO stands for Power Delivery Object, a crucial component of the USB-PD protocol. Currently, 100W multi-port chargers, while designed for global wide voltage input, suffer from inherently low efficiency at low voltage inputs. This necessitates increased casing size to meet temperature safety standards, further diminishing the user experience of carrying multiple chargers with a single unit and failing to provide optimal consumer satisfaction. Therefore, the market demands a new type of fast-charging power supply circuit and charger that meets safety and temperature standards without increasing size, while also being more suitable for domestic and international applications. Utility Model Content

[0004] To address the aforementioned problems, this utility model aims to provide a multi-series supercapacitor current-limiting charging circuit and charger.

[0005] To achieve this technical objective, the solution of this utility model is: an adaptive PDO fast charging power supply circuit, comprising: a protocol chip for receiving GPIO signals and controlling the PDO output voltage of the output port;

[0006] An input circuit, one end of which can be electrically connected to a wide-voltage mains power supply, and the other end of which is connected to a voltage conversion circuit;

[0007] Voltage conversion circuits are used to convert input voltage (wide-range AC mains power) into a specified output voltage.

[0008] The sampling circuit can sample the input voltage through the secondary winding of the voltage conversion circuit, and then transmit the voltage information to the protocol chip through the GPIO line;

[0009] The output port is used to electrically connect to external devices and provide them with a specified output voltage for charging and power supply.

[0010] Preferably, the voltage conversion circuit is composed of a transformer T1A, MOSFETs Q1 and Q2, resistors R3, R6, and R7, capacitors C1 and C3, diodes D3 and D2, electrolytic capacitors CE1 and CE2, capacitor C5, and capacitor C6. Resistors R6 and R7 are connected in parallel and then in series with resistor R3. The cathode of diode D3 is electrically connected to resistor R6, and the anode of diode D3 is electrically connected to the drain of MOSFET Q2 and pin 1 of transformer T1A. Capacitors C1 and C3 are connected in series and then in parallel with resistor R3. Resistor R3 is electrically connected to pin 2 of transformer T1A.

[0011] The resistor R5, capacitor C5, and capacitor C6 are connected in series and then in parallel with the resistor R3 and MOSFET Q1, respectively. The electrolytic capacitors CE1 and CE2 are connected in parallel and then electrically connected to pin 6 of transformer T1A. The drain of MOSFET Q1 is electrically connected to pin 7 of transformer T1A.

[0012] Preferably, the sampling circuit is composed of diode D1, resistors R1, R2, and R4, and capacitors C2 and C4. The cathode of diode D1 is connected in series with resistors R1, R2, and R4, and the anode of diode D1 is electrically connected to the drain of MOSFET Q1. Capacitor C2 is connected in parallel with resistor R1, and capacitor C4 is connected in parallel with resistors R1 and R2. The GPIO line is electrically connected to resistors R1 and R2.

[0013] Preferably, the number of output ports is greater than or equal to two, and the maximum output power of the output ports is greater than or equal to 100W.

[0014] Preferably, the voltage of the wide-voltage mains power supply is 110-230V and the frequency is 50-60Hz.

[0015] Preferably, the protocol chip is model IP2726S.

[0016] A charger includes a charger housing and two or more output ports. A PCB board is fixedly installed inside the charger housing. An adaptive PDO fast charging power supply circuit is provided on the PCB board. The output ports are located on the charger housing. The charger housing is also provided with a power plug.

[0017] The beneficial effects of this utility model are that the circuit of this application can meet safety and temperature standards without increasing size; it is also more suitable for domestic and international application scenarios. This adaptive PDO fast charging 100W power supply circuit samples the input voltage through transformer T1A, generates a GPIO signal to the protocol chip, and thus changes the PDO, achieving adaptive PDO for high and low voltage inputs. This enables domestic compatibility with international voltage applications and reduces the size of existing market products. It solves the problems of large size and bulkiness of traditional solutions, making the product more adaptable to market demands and enhancing the consumer experience. Attached Figure Description

[0018] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0019] The utility model of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. In order to provide a clear and complete description of the technical solution, the following embodiments are selected for illustration; other embodiments obtained based on the content described in this application without creative effort are all within the scope of protection of this utility model.

[0020] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of clearly describing this embodiment, rather than indicating or implying that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] like Figure 1As shown, the specific embodiment of this utility model is an adaptive PDO fast charging power supply circuit, especially suitable for use with 100W fast charging power supply adapters. The input circuit is connected to a wide-voltage (typically 110-220V, 50-60Hz international voltage) AC mains power supply via a plug. The other end of the input circuit is connected to a voltage conversion circuit to convert the high voltage into a voltage that meets the device requirements. The protocol chip (model: IP2726S) obtains the input voltage information through a sampling circuit. The sampling circuit can sample the input voltage information through the secondary winding of the voltage conversion circuit, and then transmit the voltage information to the protocol chip through the GPIO line. After receiving the GPIO signal, the protocol chip controls the PDO output voltage of the output port. By connecting the charging cable with the specified interface to the output port, the specified output voltage can be provided to external devices for charging and power supply. The voltage conversion circuit is composed of transformer T1A, MOSFETs Q1 and Q2, resistors R3, R6, and R7, capacitors C1 and C3, diodes D3 and D2, electrolytic capacitors CE1 and CE2, capacitor C5, and capacitor C6. Resistors R6 and R7 are connected in parallel and then in series with resistor R3. The cathode of diode D3 is electrically connected to resistor R6, and the anode of diode D3 is electrically connected to the drain of MOSFET Q2 and pin 1 of transformer T1A. Capacitors C1 and C3 are connected in series and then in parallel with resistor R3, which is electrically connected to pin 2 of transformer T1A. Resistors R5, C5, and C6 are connected in series and then in parallel with resistor R3 and MOSFET Q1, respectively. Electrolytic capacitors CE1 and CE2 are connected in parallel and then in pin 6 of transformer T1A. The drain of MOSFET Q1 is electrically connected to pin 7 of transformer T1A.

[0022] Reference Appendix Figure 1 Compared to traditional solutions, this application adds components such as D1, R4, R1, R2, C2, and C4 to sample the input voltage via the transformer secondary winding, thereby achieving different PDO output voltages for low-voltage and high-voltage inputs. The sampling circuit consists of diode D1, resistors R1, R2, and R4, and capacitors C2 and C4. The cathode of diode D1 is connected in series with resistors R1, R2, and R4, while the anode of diode D1 is electrically connected to the drain of MOSFET Q1. Capacitor C2 is connected in parallel with resistor R1, and capacitor C4 is connected in parallel with resistors R1 and R2. The GPIO line is electrically connected to resistors R1 and R2.

[0023] To facilitate power supply to multiple external devices, the number of output ports is greater than or equal to two. When the rated power is 100W, the sum of the maximum output power of the output ports is equal to 100W. The output power of each output port can be adjusted and controlled through the protocol chip.

[0024] A charger includes a charger housing and two or more output ports. A PCB board is fixedly installed inside the charger housing. An adaptive PDO fast charging power supply circuit is provided on the PCB board. The output ports are located on the charger housing. The charger housing is also provided with a power plug.

[0025] Existing protocol chips only collect device information and output corresponding voltage and current to meet the requirements of fast charging. For chargers with a global wide voltage input (110-220V, 50-60Hz), the heat generated by the transformer during voltage conversion is also affected by the input voltage. When the protocol chip can collect the input voltage, it can adjust the output voltage as needed to reduce the heat generated by the transformer. For example, if a low voltage (such as 20V) is used to achieve 100W fast charging, an extremely high current (5A) is required to achieve the power. According to the formula P=I²R, a large current will lead to a significant increase in the resistance loss of the wires / components, with more energy being converted into heat rather than effective charging power. This is an inherent characteristic determined by the laws of physics and cannot be completely eliminated through conventional circuit optimization. The only options are to increase the size of the casing, increase the area of ​​the heat sink, or use a metal casing with better thermal conductivity to allow more space for air convection. In summary, due to the inherently low efficiency of low-voltage input, it is necessary to further increase the size of the casing to meet the temperature requirements of not exceeding safety standards. This will further reduce the user experience of carrying multiple chargers to one charger and does not provide consumers with the optimal experience.

[0026] The circuit described in this application meets safety and temperature standards without increasing size; it is also more suitable for domestic and international application scenarios. This adaptive PDO fast-charging 100W power supply circuit samples the input voltage through transformer T1A, generates a GPIO signal, and sends it to the protocol chip to change the PDO, achieving adaptive PDO for high and low voltage inputs. This enables domestic compatibility with international voltage applications and reduces the size of existing market products. It solves the problems of large size and bulkiness of traditional solutions, making the product more adaptable to market demands and enhancing the consumer experience.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adaptive PDO fast charging power supply circuit, characterized in that, include: The protocol chip is used to receive GPIO signals and control the PDO output voltage of the output port; An input circuit, one end of which can be electrically connected to a wide-voltage mains power supply, and the other end of which is connected to a voltage conversion circuit; Voltage conversion circuits are used to convert input voltage (wide-range AC mains power) into a specified output voltage. The sampling circuit can sample the input voltage through the secondary winding of the voltage conversion circuit, and then transmit the voltage information to the protocol chip through the GPIO line; The output port is used to electrically connect to external devices and provide them with a specified output voltage for charging and power supply. The voltage conversion circuit is composed of transformer T1A, MOSFETs Q1 and Q2, resistors R3, R6, and R7, capacitors C1 and C3, diodes D3 and D2, electrolytic capacitors CE1 and CE2, capacitor C5, and capacitor C6. Resistors R6 and R7 are connected in parallel and then in series with resistor R3. The cathode of diode D3 is electrically connected to resistor R6, and the anode of diode D3 is electrically connected to the drain of MOSFET Q2 and pin 1 of transformer T1A. Capacitors C1 and C3 are connected in series and then in parallel with resistor R3. Resistor R3 is electrically connected to pin 2 of transformer T1A. The resistor R5, capacitor C5, and capacitor C6 are connected in series and then in parallel with the resistor R3 and MOSFET Q1, respectively. The electrolytic capacitors CE1 and CE2 are connected in parallel and then electrically connected to pin 6 of transformer T1A. The drain of MOSFET Q1 is electrically connected to pin 7 of transformer T1A.

2. The adaptive PDO fast charging power supply circuit of claim 1, wherein: The sampling circuit is composed of diode D1, resistors R1, R2, and R4, and capacitors C2 and C4. The cathode of diode D1 is connected in series with resistors R1, R2, and R4, and the anode of diode D1 is electrically connected to the drain of MOSFET Q1. Capacitor C2 is connected in parallel with resistor R1, and capacitor C4 is connected in parallel with resistors R1 and R2. The GPIO line is electrically connected to resistors R1 and R2.

3. The adaptive PDO fast charging power supply circuit of claim 1, wherein: The number of output ports is greater than or equal to two, and the maximum output power of the output ports is greater than or equal to 100W.

4. The adaptive PDO fast charging power supply circuit of claim 1, wherein: The wide-voltage mains power supply has a voltage of 110-230V and a frequency of 50-60Hz.

5. The adaptive PDO fast charging power supply circuit of claim 1, wherein: The protocol chip model is IP2726S.

6. A charger characterized by comprising: The charger includes a charger housing and two or more output ports. A PCB board is fixedly installed inside the charger housing. The PCB board is provided with an adaptive PDO fast charging power supply circuit as described in any one of claims 1-5. The output ports are located on the charger housing. The charger housing is also provided with a power plug.

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