CN216819441U

CN216819441U - PD charging converter

Info

Publication number: CN216819441U
Application number: CN202123126145.0U
Authority: CN
Inventors: 陈龙扣; 鄢继浩
Original assignee: Shenzhen Baseus Technology Co Ltd
Current assignee: Shenzhen Baseus Technology Co Ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-06-24
Anticipated expiration: 2031-12-13

Abstract

The utility model provides a PD charging converter which comprises a PD charging voltage input end, a charging output end, a voltage conversion circuit and a control circuit. The input end of the PD charging voltage is used for accessing the PD charging voltage output by the PD quick-charging charger, the charging output end of the PD quick-charging charger is used for being connected with the charging end of the electronic equipment, the input end of the voltage conversion circuit is connected with the input end of the PD charging voltage, the output end of the voltage conversion circuit is connected with the charging output end, and the control circuit is respectively and electrically connected with the PD charging voltage input end and the controlled end of the voltage conversion circuit. The utility model aims to realize that a high-power high-voltage PD quick-charging charger is used for charging old electronic equipment which has high power but low-voltage charging requirements, and improve the convenience of using the PD quick-charging charger by a user.

Description

PD charging converter

Technical Field

The utility model relates to the field of charging, in particular to a PD charging converter.

Background

With the popularization of the USB PD3.1 standard, the charging power that the PD charger can support is higher and higher, for example, the current USB PD3.1 supports 48V × 5A (240W) power supply, but part of old electronic devices (such as notebook computers) that require high-power charging (240W) have a charging port capable of inputting at most 20V, and it is difficult to use the 48V charging voltage of the new PD charger to charge the old electronic devices, which causes inconvenience for users.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a PD charging converter, which aims to realize the charging of old electronic equipment which is required by high-power and low-voltage charging by using a high-power and high-voltage PD quick charging charger and improve the convenience of using the PD quick charging charger by a user.

To achieve the above object, the present invention provides a PD charging converter, which includes:

the PD charging voltage input end is used for accessing a PD charging voltage output by a PD quick charging charger;

the charging output end is used for being connected with a charging end of the electronic equipment;

the input end of the voltage conversion circuit is connected with the PD charging voltage input end, and the output end of the voltage conversion circuit is connected with the charging output end;

the control circuit is respectively and electrically connected with the PD charging voltage input end and the controlled end of the voltage conversion circuit;

the control circuit is configured to control the voltage conversion circuit to start working when it is detected that the PD charging voltage input terminal is connected to the PD charging voltage, so as to output the PD charging voltage to the charging terminal of the electronic device through the charging output terminal after voltage conversion is performed on the PD charging voltage, so as to provide the charging voltage for the electronic device.

Optionally, the control circuit includes a main controller and a voltage regulating assembly;

the input end of the voltage regulating component is connected with the PD charging voltage input end, and the output end of the voltage regulating component is electrically connected with the power supply end of the main controller;

the voltage regulating assembly is used for converting the voltage of the PD charging voltage output by the PD quick charging charger and outputting the voltage to the power supply end of the main controller so as to provide working voltage for the main controller;

the main controller is configured to control the voltage conversion circuit to start working when the electronic device is powered on, so as to output the PD charging voltage to a charging terminal of the electronic device through the charging output terminal after voltage conversion is performed on the PD charging voltage, so as to provide the charging voltage for the electronic device.

Optionally, the voltage conversion circuit includes a first switch tube, a second switch tube, a first resistor, a second resistor, a first inductor, a first capacitor, and a first diode; the charging output end comprises a positive electrode output end and a negative electrode output end;

the first end of the first switch tube, the second end of the first resistor and the second end of the second switch tube are connected, the second end of the first switch tube is connected with the PD charging voltage input end, the third end of the first switch tube, the cathode of the first diode and the first end of the first inductor are connected, the first end of the second switch tube and the first end of the second resistor are respectively and electrically connected with the main controller, the second end of the second resistor, the third end of the second switch tube, the anode of the first diode, the second end of the first capacitor and the negative output end are all grounded, and the second end of the first inductor and the first end of the first capacitor are respectively connected with the positive output end.

Optionally, the PD charging voltage input terminal is a USB-C interface; the charging output end is any one of a USB-A interface, a USB-B interface and a USB-C interface.

Optionally, the PD charging converter further includes:

the output end of the voltage detection circuit is electrically connected with the control circuit, and the voltage detection circuit is electrically connected with the output end of the voltage conversion circuit;

the voltage detection circuit is used for detecting the voltage value of the charging voltage output by the voltage conversion circuit and outputting a corresponding voltage detection signal;

and the control circuit is used for controlling the voltage conversion circuit to stop working when the charging voltage value output by the voltage conversion circuit is determined to reach a preset alarm voltage value according to the voltage detection signal.

Optionally, the PD charging converter further includes:

the output end of the current detection circuit is electrically connected with the control circuit, and the current detection circuit is connected in series on a path between the output end of the voltage conversion voltage and the charging output end;

the current detection circuit is used for detecting the current value of the charging current output by the voltage conversion circuit and outputting a corresponding current detection signal;

and the control circuit is used for controlling the voltage conversion circuit to stop working when the current value of the charging current output by the voltage conversion circuit is determined to reach a preset alarm current value according to the current detection signal.

Optionally, the PD charging converter further includes:

the output end of the charging voltage setting component is electrically connected with the control circuit;

the charging voltage setting component is used for outputting a corresponding charging voltage setting signal when triggered by a user;

the control circuit is configured to control the voltage conversion circuit to start working when the PD charging voltage input terminal is detected to be connected to the PD charging voltage according to the charging voltage setting signal, so as to output the PD charging voltage to the charging terminal of the electronic device through the charging output terminal after voltage conversion is performed on the PD charging voltage, and provide the charging voltage with a voltage value corresponding to the charging voltage setting signal for the electronic device.

Optionally, the PD charging converter further includes:

the display assembly is electrically connected with the control circuit;

the control circuit is used for controlling the display component to display the current charging voltage value and the current charging current value output by the voltage conversion circuit according to the voltage detection signal and the current detection signal;

the control circuit is further used for controlling the display assembly to display the currently set charging voltage value according to the charging voltage setting signal.

Optionally, the PD charging converter further includes:

a housing;

the circuit board is arranged in the shell, and the PD charging voltage input end, the charging output end, the voltage conversion circuit, the control circuit, the voltage detection circuit, the current detection circuit, the charging voltage setting assembly and the display assembly are arranged on the circuit board;

wherein, the shell is provided with openings corresponding to the charging voltage setting component, the charging output end, the PD charging voltage input end and the display component.

The PD charging converter comprises a PD charging voltage input end, a charging output end, a voltage conversion circuit and a control circuit. The PD charging voltage input end is used for accessing PD charging voltage output by the PD quick charging charger, the charging output end is used for being connected with a charging end of the electronic equipment, and the control circuit is used for controlling the voltage conversion circuit to start working when detecting that the PD charging voltage input end is accessed with the PD charging voltage, so that the PD charging voltage is output to the charging end of the electronic equipment through the charging output end after being subjected to voltage conversion, and the charging voltage is provided for the electronic equipment. The utility model realizes that the high-power high-voltage PD quick charger is used for charging the old electronic equipment which requires high-power but low-voltage charging, and improves the convenience of using the PD quick charger by users.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic block diagram of a PD charging converter according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a PD charging converter according to an embodiment of the present invention;

fig. 3 is a schematic block diagram of a PD charging converter according to an embodiment of the present invention;

fig. 4 is a schematic block diagram of a PD charging converter according to an embodiment of the present invention;

fig. 5 is a schematic block diagram of a PD charging converter according to an embodiment of the present invention;

FIG. 6 is a detailed circuit diagram of an embodiment of a PD charging converter of the utility model;

fig. 7 is a specific circuit diagram of a PD charging converter according to an embodiment of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

To this end, referring to fig. 1, in an embodiment of the present invention, a PD charging converter includes:

the PD charging voltage input end 10 is used for accessing PD charging voltage output by a PD quick charging charger;

the charging output end 20, the charging output end 20 is used for connecting with a charging end of the electronic equipment;

the input end of the voltage conversion circuit 30 is connected with the PD charging voltage input end 10, and the output end of the voltage conversion circuit 30 is connected with the charging output end 20;

the control circuit 40, the control circuit 40 is respectively electrically connected with the PD charging voltage input terminal 10 and the controlled terminal of the voltage conversion circuit 30;

and the control circuit 40 is configured to, when it is detected that the PD charging voltage input terminal 10 is connected to the PD charging voltage, control the voltage conversion circuit 30 to start operating, so as to output the PD charging voltage after voltage conversion to the charging terminal of the electronic device through the charging output terminal 20, so as to provide the charging voltage for the electronic device.

In this embodiment, the PD charging voltage input terminal 10 may be a USB-C interface, so as to enable a male plug to be plugged into a data line of the USB PD3.1, thereby establishing an electrical connection between the PD charging converter and the PD quick charging charger.

In this embodiment, the charging output terminal 20 may be any one of a USB-a interface, a USB-B interface, and a USB-C interface, and the charging output terminal 20 may be a female interface socket or a male interface socket. It is understood that the number of the charging output terminals 20 may be multiple, and the interface type of each charging output terminal 20 may be different, so as to satisfy electronic devices with different interfaces.

In this embodiment, optionally, the voltage conversion circuit 30 may be implemented by a BUCK step-down circuit, so that the control circuit 40 only needs to output a PWM control signal with a preset duty ratio to control the BUCK step-down circuit to operate when detecting that the PD charging voltage input terminal 10 is connected to the PD charging voltage (where the preset duty ratio is preset by a developer according to a charging voltage value required by the electronic device); optionally, the voltage conversion circuit 30 may also be implemented by a voltage reduction chip, the control circuit 40 is connected to an enable end of the voltage reduction chip, and when the control circuit 40 detects that the PD charging voltage input terminal 10 is connected to the PD charging voltage, the control circuit outputs a start control signal to the enable end of the voltage reduction chip, so that the voltage reduction chip starts to operate, and the PD charging voltage is output to a charging end of the electronic device through the charging output terminal 20 after being subjected to voltage conversion, so as to provide the charging voltage for the electronic device. For example, "the PD charging voltage output by the PD fast charging charger is 48V, and the voltage conversion circuit 30 down-converts the PD charging voltage and outputs 20V to the charging terminal of the electronic device via the charging output terminal".

In this embodiment, optionally, the control circuit 40 may be implemented by a main controller and an input voltage detection circuit 50 electrically connected thereto, and the main controller may be implemented by an MCU (micro controller unit), a DSP (Digital Signal processing) chip, and an FPGA (Field Programmable Gate Array). The input voltage detection circuit 50 may be implemented by a resistor divider circuit, and when the main controller detects that the PD charging voltage is connected to the PD charging voltage input terminal 10 through the voltage detection circuit 50, the main controller controls the voltage conversion circuit 30 to start operating. Optionally, in another embodiment, an additional power supply may not be provided in the PD charging converter, the control circuit 40 includes a main controller and a voltage regulator electrically connected to the main controller, and the voltage regulator directly reduces the PD charging voltage output to the PD charging voltage input terminal 10 when the PD rapid charging charger is connected, and outputs the reduced PD charging voltage to the main controller, so as to provide a working voltage for the main controller, that is, when the main controller is in a power-on state. After the main controller is powered on, it is determined that the current PD quick-charging charger has been connected and has output a PD charging voltage, that is, it is detected that the PD charging voltage input terminal 10 has been connected to the PD charging voltage, at this time, the main controller controls the voltage conversion circuit 30 to start working, so as to convert the PD charging voltage and output the voltage to the charging terminal of the electronic device through the charging output terminal 20, so as to provide the charging voltage meeting the charging requirement for the electronic device.

The PD charging converter of the present invention includes a PD charging voltage input terminal 10, a charging output terminal 20, a voltage conversion circuit 30, and a control circuit 40. The PD charging voltage input end 10 is configured to access a PD charging voltage output by a PD quick-charging charger, the charging output end 20 is configured to be connected to a charging end of an electronic device, and the control circuit 40 is configured to control the voltage conversion circuit 30 to start working when detecting that the PD charging voltage input end 10 is accessed to the PD charging voltage, so as to output the PD charging voltage to the charging end of the electronic device through the charging output end 20 after performing voltage conversion on the PD charging voltage, so as to provide the charging voltage for the electronic device. The utility model realizes that the high-power high-voltage PD quick charger is used for charging the old electronic equipment which requires high-power but low-voltage charging, and improves the convenience of using the PD quick charger by users.

Specifically, in one embodiment, referring to fig. 5, the control circuit 40 includes a main controller U1 and a voltage regulation assembly;

the input end of the voltage regulating assembly is connected with the PD charging voltage input end 10, and the output end of the voltage regulating assembly is electrically connected with the power supply end of the main controller U1;

the voltage regulating assembly is used for converting the voltage of the PD charging voltage output by the PD quick charging charger and outputting the voltage to a power supply end of the main controller U1 so as to provide working voltage for the main controller U1;

and the main controller U1 is configured to, when the electronic device is powered on, control the voltage conversion circuit 30 to start operating, so as to output the PD charging voltage to a charging terminal of the electronic device through the charging output terminal 20 after performing voltage conversion on the PD charging voltage, so as to provide the charging voltage for the electronic device.

In this embodiment, the charging output terminal 20 may be any one of a USB-a interface, a USB-B interface, and a USB-C interface, and the positive output terminal is a voltage output pin of the interface, and the negative output terminal is a ground pin.

Specifically, the voltage conversion circuit 30 is a BUCK voltage reduction circuit, and includes a first switch Q1, a second switch Q2, a first resistor R1, a second resistor R2, a first inductor L1, a first capacitor C1, and a first diode D1; the charging output terminal 20 includes a positive output terminal and a negative output terminal; the main controller U1 has a power supply terminal VCC and a control signal output terminal KZ, and the voltage regulating assembly comprises an LDO chip U2, a second capacitor C2 and a third capacitor C3; the charging input terminal is illustrated as a TYPE-C interface J1.

The first end of the first switch tube Q1, the second end of the first resistor R1 and the second end of the second switch tube Q2 are connected, the second end of the first switch tube Q1 is connected with the PD charging voltage input end 10, the third end of the first switch tube Q1, the cathode of the first diode Q1, the first end of the first inductor L1 are connected, the first end of the second switch tube Q2 and the first end of the second resistor R2 are respectively electrically connected with the control signal output end KZ of the main controller U1, the second end of the second resistor R2, the third end of the second switch tube Q2, the anode of the first diode D1, the second end of the first capacitor C1 and the cathode output end are all grounded, and the second end of the first inductor L1 and the first end of the first capacitor C1 are respectively connected with the output end. The power end of the main controller U1 and the first end of the third capacitor C3 are connected to the output end of the LDO chip U2, the input end of the LDO chip U2 and the first end of the second capacitor C2 are connected to the voltage input pin VBUS of the TYPE-C interface J1, and the ground pin GND of the TYPE-C interface J1, the ground pin of the LDO chip U2, the second end of the second capacitor C2, and the second end of the third capacitor C3 are all grounded.

It should be understood that, in practical applications, the main controller U1 is further provided with a ground terminal VSS, and two TYPE-C communication terminals which are internally set to a pull-down ground (i.e., pulled down to the same voltage value as the ground terminal VSS) and are respectively connected to the CC1 pin and the CC2 pin of the TYPE-C interface J1, and the ground terminal VSS is connected to the ground pin GND of the TYPE-C interface J1 (not shown in the figure).

Thus, when the PD quick-charging charger is connected to the TYPE-C interface J1, the pin CC1, the pin CC2 and the ground pin on the interface of the PD quick-charging charger respectively cling to the pin CC1, the pin CC2 and the ground pin GND on the TYPE-C interface J1, and establish an electrical connection path in a one-to-one correspondence manner. At this time, since the ground terminal VSS of the main controller U1 is connected to the ground pin GND of the TYPE-C interface J1, and the two TYPE-C communication terminals are set to be pulled down to the ground, the CC1 pin and the CC2 pin on the TYPE-C interface J1 are also pulled down to the ground, so that the corresponding CC1 pin and the CC2 pin on the PD fast charging charger are pulled down to the ground, that is, are pulled down to the low level of the PD fast charging charger. (because the ground in the PD charging converter is the ground of the PD fast charger) at this time, the PD fast charger is activated to start outputting the PD charging voltage to the charging input terminal (in practical applications, the pins CC1 and CC2 of the PD fast charger start outputting the voltage to the outside only when the pins CC1 and CC2 are at low level).

In this embodiment, after the PD fast charger starts to output the PD charging voltage, the LDO chip U2 converts the voltage of the PD charging voltage output by the PD fast charger and outputs the first voltage V1 to the power supply terminal VCC of the main controller U1, so as to provide the main controller with a working voltage, and enable the main controller U1 to enter a power-on state. When the main controller U1 is powered on, it is determined that the current PD charging voltage is input, and the PWM control signal with the preset duty ratio is output through the control signal output terminal KZ to control the BUCK circuit to step down and convert the PD charging voltage, and then the PD charging voltage is output to the charging terminal of the electronic device through the charging output terminal 20, so as to provide the charging voltage for the electronic device.

Referring to fig. 2, in an embodiment of the present invention, the PD charging converter further includes:

the output end of the voltage detection circuit 50 is electrically connected with the control circuit 40, and the voltage detection circuit 50 is electrically connected with the output end of the voltage conversion circuit 30;

a voltage detection circuit 50 for detecting a voltage value of the charging voltage output from the voltage conversion circuit 30 and outputting a corresponding voltage detection signal;

and the control circuit 40 is used for controlling the voltage conversion circuit 30 to stop working when the charging voltage value output by the voltage conversion circuit 30 is determined to reach the preset alarm voltage value according to the voltage detection signal.

In this embodiment, optionally, the voltage detection circuit 50 may be implemented by a resistor voltage-dividing circuit, the control circuit 40 may be integrated with a calculation module and an ADC detection module, the control circuit 40 may detect a voltage-dividing voltage value output by the voltage-dividing circuit through the ADC detection module, and calculate a charging voltage value output by the current voltage conversion circuit 30 according to the detected voltage-dividing voltage value and a resistance value ratio in the resistor voltage-dividing circuit, and control the voltage conversion circuit 30 to stop working in time when the charging voltage value reaches a preset alarm voltage value.

Optionally, the voltage detection circuit 50 may also be implemented by a voltage detection chip, the voltage detection chip may detect a charging voltage value output by the current voltage conversion circuit 30, and output a corresponding voltage detection signal as a digital signal to the control circuit 40, the control circuit 40 may determine the voltage value of the charging voltage output by the current voltage conversion circuit 30 according to the received voltage detection signal, and control the voltage conversion circuit 30 to stop working when it is determined that the voltage value of the charging voltage output by the voltage conversion circuit 30 reaches the preset alarm voltage value. The preset alarm voltage value is preset by research personnel.

Through the above arrangement, the control circuit 40 determines the charging voltage output by the voltage conversion circuit 30 according to the voltage detection signal, that is, the charging voltage value actually received by the electronic device, and when the voltage value of the charging voltage reaches the preset alarm voltage value, the voltage conversion circuit 30 controlled in time stops working, so that the charging operation of the electronic device is suspended, thereby effectively protecting the electronic device and the PD charging converter, preventing the electronic device and/or the charging converter from being damaged by an excessive current, and effectively improving the safety and stability of the operation of the PD charger.

Referring to fig. 3, in an embodiment of the present invention, the PD charging converter further includes:

a current detection circuit 60, an output terminal of the current detection circuit 60 being electrically connected to the control circuit 40, the current detection circuit 60 being connected in series to a path between the output terminal of the voltage conversion voltage and the charging output terminal 20;

a current detection circuit 60 for detecting a current value of the charging current output from the voltage conversion circuit 30 and outputting a corresponding current detection signal;

and the control circuit 40 is configured to control the voltage conversion circuit 30 to stop working when it is determined that the current value of the charging current output by the voltage conversion circuit 30 reaches a preset alarm current value according to the current detection signal.

In this embodiment, optionally, the current detection circuit 60 may be implemented by using a current detection resistor, a calculation module is integrated in the control circuit 40, the control circuit 40 may detect voltages at two ends of the current detection resistor, and after calculating a voltage difference between the two ends, determine a current value flowing through the current detection resistor according to a known resistance value of the current detection resistor, because the current detection resistor is connected in series to a path between the output end of the voltage conversion voltage and the charging output end 20, the calculated current value is a charging current value output by the voltage conversion circuit 30, and the control circuit 40 may control the voltage conversion circuit 30 to stop working in time according to the current charging current value obtained by calculation when determining that the charging current value is greater than a preset alarm current value; the preset alarm current value is preset by research personnel.

Optionally, the current detection circuit 60 may also be implemented by using a current detection chip, the current detection chip may detect a current value of the charging current output by the current voltage conversion circuit 30, and output a corresponding current detection signal which is a digital signal to the control circuit 40, the control circuit 40 may determine the current value of the charging current output by the current voltage conversion circuit 30 according to the received current detection signal, and control the voltage conversion circuit 30 to stop working when it is determined that the current value of the charging current output by the voltage conversion circuit 30 reaches a preset alarm current value.

Through the arrangement, the control circuit 40 can determine the charging current output by the voltage conversion circuit 30 according to the current detection signal, namely the charging current of the electronic device during charging, and when the current value of the charging current reaches the preset alarm current, the voltage conversion circuit 30 controlled in time stops working, so that the charging operation of the electronic device is suspended, the electronic device and the PD charging converter are effectively protected, the electronic device and/or the charging converter are prevented from being damaged by the overlarge current, and the working safety and stability of the PD charger are effectively improved.

Specifically, taking the specific circuits in the above-mentioned embodiment as an example for illustration, referring to fig. 6, the main controller U1 further has a voltage detection terminal DY and a current detection terminal DL, the voltage detection circuit 50 includes a fourth resistor R4 and a fifth resistor R5, and the current detection circuit 60 includes a third resistor R3. The third resistor R3 is a current sensing resistor with low resistance, high precision and low temperature drift. A first end of the fourth resistor R4 is electrically connected to the positive output terminal, a second end of the fourth resistor R4 and a first end of the fifth resistor R5 are respectively connected to the voltage detection terminal DY of the main controller U1, a second end of the fifth resistor R5 and a second end of the third resistor R3 are respectively connected to a second end of the first capacitor, and a first end of the third resistor R3 is grounded.

As can be seen from the above, in this embodiment, the main controller U1 integrates a calculation module and an ADC voltage detection module, and the main controller U1 can detect the voltage value of the first end of the fifth resistor R5 through the voltage detection terminal DY, calculate the charging voltage actually output by the current voltage conversion circuit 30 according to the known resistance value of the third resistor R3, the known resistance value of the fourth resistor R4, and the known resistance value of the fifth resistor R5, and control the voltage conversion circuit 30 to stop working when the charging voltage is greater than the preset alarm voltage.

It is understood that the PD charging converter may further include a charging voltage setting component 70 for setting the charging voltage outputted by the PD charging converter to meet the requirements of different charging voltages of different old electronic devices. Therefore, the main controller U1 can also control the voltage converting circuit 30 to stop working when detecting that the actually output charging voltage exceeds the preset safety range of the set charging voltage, for example, the set charging voltage is 20V, and the safety range is 20 ± 5V, so as to prevent the electronic device to be charged from being damaged by outputting an excessively high voltage.

In this embodiment, the main controller U1 further detects the voltage at the second end of the third resistor R3, when the charging end of the electronic device to be charged is connected to the charging output terminal 20, since the third resistor R3 is connected to the output loop of the voltage conversion circuit 30, the current flowing through the third resistor R3 is the charging current output by the actual voltage conversion circuit 30, and since the third resistor R3 is a current sensing resistor with high precision of low resistance value and high temperature drift, the main controller U1 can detect the voltage at the third resistor R3, that is, the voltage value at the second end of the third resistor R3 (since the first end is grounded), and calculate the charging current value output by the current voltage conversion circuit 30 according to the resistance value of the third resistor R3, and control the voltage conversion circuit 30 to stop operating when it is determined that the current value of the charging current output by the voltage conversion circuit 30 reaches the preset alarm current value, the damage of the overlarge current to the electronic equipment and/or the charging converter is prevented, and the working safety and stability of the PD charger are effectively improved.

Referring to fig. 4, in an embodiment of the present invention, the PD charging converter further includes:

a charging voltage setting component 70, an output end of the charging voltage setting component 70 is electrically connected with the control circuit 40;

a charging voltage setting component 70 for outputting a corresponding charging voltage setting signal when triggered by a user;

and the control circuit 40 is configured to, according to the charging voltage setting signal, control the voltage conversion circuit 30 to start operating when detecting that the PD charging voltage is connected to the PD charging voltage input terminal 10, so as to output the PD charging voltage to the charging terminal of the electronic device through the charging output terminal 20 after performing voltage conversion on the PD charging voltage, so as to provide the charging voltage with a voltage value corresponding to the charging voltage setting signal for the electronic device.

In this embodiment, optionally, the charging voltage setting assembly 70 may be implemented using a touchable screen, the touchable screen may be provided with touchable areas with a plurality of charging voltage levels, such as "20V touchable area", "18V touchable area", "15V touchable area", etc., and a user may touch the touchable area of the corresponding charging voltage level according to the actual charging voltage value of the electronic device to be charged, such that the charging voltage setting module 70 outputs a corresponding charging voltage setting signal to the control circuit 40, the control circuit 40 can determine the currently required charging voltage according to the charging voltage setting signal, and adjusts the duty ratio of the control signal output to the voltage converting circuit 30 according to the pre-stored charging voltage-PWM signal duty ratio mapping table, so that the voltage conversion circuit 30 outputs a charging voltage having a voltage value corresponding to the charging voltage setting signal to the electronic device to be charged through the charging output terminal 20; the charging voltage-PWM signal duty ratio mapping table is obtained by testing for a plurality of times for research personnel and is prestored in the main controller.

Alternatively, the charging voltage setting assembly 70 may be implemented by a multi-position switch assembly, such as a dial switch or a rotary switch, taking the specific circuit in the above embodiment as an example for illustration, referring to fig. 7, the main controller U1 further has a first setting end S1, a second setting end S2, and a third setting end S3, and the charging voltage setting assembly 70 includes a dial switch KEY, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, the fourth end, the fifth end, and the sixth end of the dial switch KEY are all grounded, the first end of the dial switch KEY is connected to the first end of the sixth resistor R6 and the first setting end S1, the second end of the dial switch KEY is connected to the first end of the seventh resistor R7 and the second setting end S2, the third end of the dial switch KEY is connected to the first end of the eighth resistor R8 and the third setting end S3, and the second end of the sixth resistor R6, the second end of the seventh resistor R7, and the second end of the eighth resistor R8 are all connected to the first voltage V1.

It should be understood that, when a user presses the first KEY on the dial KEY, the first terminal and the fourth terminal are conducted, and similarly, when the user presses the second KEY, the second terminal and the fifth terminal are conducted, and when the user presses the third KEY, the third terminal and the sixth terminal are conducted.

In this embodiment, the user can press a KEY on the dial KEY to enable the dial KEY to output a corresponding charging voltage setting signal, for example, when any KEY is not pressed, the charging voltage setting signal is output 111, and when the first KEY is pressed, the charging voltage setting signal is output 011. The main controller U1 may determine the currently required charging voltage according to the received charging voltage setting signal and the pre-stored charging voltage setting signal-charging voltage mapping table, and then adjust the duty ratio of the control signal output to the voltage converting circuit 30 according to the pre-stored charging voltage-PWM signal duty ratio mapping table, so that the voltage converting circuit 30 outputs the charging voltage with the voltage value corresponding to the charging voltage setting signal to the electronic device to be charged through the charging output terminal 20. For example, "when the user does not press any KEY on the dial KEY, the voltages at the first end, the second end and the third end of the dial KEY are all pulled up to the voltage value of the first voltage, at this time, the charging voltage setting signal output by the dial KEY to the main controller U1 is 111, the main controller U1 determines that the currently required charging voltage value is 20V according to the charging voltage setting signal-charging voltage mapping table, and then adjusts the duty ratio of the control signal output to the voltage conversion circuit 30 according to the preset duty ratio of the charging voltage-PWM signal, so that the voltage conversion circuit 30 outputs the 20V charging voltage to the charging output terminal 20. "

The charging voltage setting signal-charging voltage mapping table may be set by a developer and pre-stored in the main controller U1.

Through the arrangement, the charging circuit can meet different charging voltage requirements of different old-style electronic equipment, and improves the use convenience of users.

Referring to fig. 4 and 7, in an embodiment of the present invention, the PD charging converter further includes:

the display assembly 80, the display assembly 80 is electrically connected with the control circuit 40;

a control circuit 40 for controlling the display component 80 to display the charging voltage value and the charging current value output by the current voltage conversion circuit 30 according to the voltage detection signal and the current detection signal;

the control circuit 40 is further configured to control the display component 80 to display the currently set charging voltage value according to the charging voltage setting signal.

In this embodiment, the main controller U1 further has a display signal output terminal IND, and the display module 80 is electrically connected to the display signal output terminal IND of the main controller U1. Optionally, the display module 80 may be implemented by using a display screen, and the display screen may be an LED display screen, an OLED display screen, a TFT display screen, or the like. When receiving the voltage detection signal, the current detection signal, and the charging voltage setting signal, the control circuit 40 displays the actually output voltage value, the actually output current value, and the charging voltage value set by the user of the current voltage conversion circuit 30 on the display screen for the user to determine, thereby improving the convenience of the user.

In an embodiment of the present invention, the PD charging converter further includes:

a housing;

a circuit board disposed in the housing, the circuit board being provided with a PD charging voltage input terminal 10, a charging output terminal 20, a voltage conversion circuit 30, a control circuit 40, a voltage detection circuit 50, a current detection circuit 60, a charging voltage setting component 70, and a display component 80;

wherein, the housing is provided with openings corresponding to the charging voltage setting assembly 70, the charging output terminal 20, the PD charging voltage input terminal 10 and the display assembly 80.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A PD charging converter, comprising:

2. The PD charge converter of claim 1, wherein the control circuit includes a main controller and a voltage regulation component;

3. The PD charge converter of claim 2, wherein the voltage conversion circuit includes a first switching tube, a second switching tube, a first resistor, a second resistor, a first inductor, a first capacitor, and a first diode; the charging output end comprises a positive electrode output end and a negative electrode output end;

4. The PD charge converter of claim 1, wherein the PD charge voltage input is a USB-C interface; the charging output end is any one of a USB-A interface, a USB-B interface and a USB-C interface.

5. The PD charge converter of claim 1, wherein the PD charge converter further comprises:

6. The PD charge converter of claim 5, wherein the PD charge converter further includes:

7. The PD charge converter of claim 6, wherein the PD charge converter further comprises:

8. The PD charge converter of claim 7, wherein the PD charge converter further comprises:

the display assembly is electrically connected with the control circuit;

9. The PD charge converter of claim 8, wherein the PD charge converter further comprises:

a housing;