DC-to-Type-C charging circuit capable of intelligently adjusting output power

Abstract

The utility model provides a DC-to-Type-C charging circuit capable of intelligently adjusting output power, which comprises a DC interface input circuit, the input end of the DC interface input circuit can be connected with a DC interface charging head, the output end of the DC interface input circuit is in power supply connection with a power supply voltage adjusting circuit and an MCU power supply circuit, and the output end of the MCU power supply circuit is in power supply connection with an interface conversion main control circuit. The output end of the interface conversion main control circuit is in control connection with the power supply voltage adjusting circuit and the Type-C interface output circuit, the output end of the power supply voltage adjusting circuit is connected with the input end of the Type-C interface output circuit, and the output end of the Type-C interface output circuit can be connected with Type-C interface intelligent electronic equipment. The Type-C interface conversion circuit has the beneficial effects that the function of charging intelligent electronic equipment with a Type-C interface by converting DC interface input into Type-C interface output can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit technical field, concretely relates to a DC conversion Type-C charging circuit of intelligent adjustment output power. BACKGROUND

[0002] DC interface is a kind of interface for the effective output fixed voltage after the input voltage is changed.It is composed of horizontal socket, vertical socket, insulating base, fork contact spring, directional keyway, two fork contact springs are positioned in the center part of base, and are arranged longitudinally and transversely and not connected longitudinally and transversely.The one end of DC interface fork contact spring is wiring port, exposed on the top surface of base cylinder, for connecting input power soft wire or soft cable, the other end of fork contact spring is composed of two elastic arms interconnected by base, is arranged in the insulating base insertion hole in the direction of DC interface insertion, for the equipment, so that it works normally.DC interface can adopt three types of control according to demand.PWM control type has high efficiency and good output voltage ripple and noise.PFM control type has the advantage of small power consumption even for long time use, especially for small load.PWM / PFM conversion type implements PFM control for small load, and automatically converts to PWM control for heavy load.

[0003] Type-C interface is a kind of connection interface of USB interface, and can be inserted without distinction of front and back, and the size is about 8.3mm×2.5mm, and it supports charging, data transmission, display output and other functions of USB standard as other interfaces.Type-C is widely used in mobile phones, tablets, digital cameras, portable media players and various electronic products.Type-C is formulated by USB-IF, and starts to popularize after being supported by apple, Google, Intel, Microsoft and other manufacturers in 2014.Type-C charging line is a kind of charging line using Type-C interface, and has the function of positive and negative blind insertion, compared with traditional charging line, has faster transmission speed and stronger safety.

[0004] Nowadays, many smart electronic devices are equipped with Type-C charging lines, which not only have the function of blind insertion of front and back, but also have faster transmission speed and stronger safety. Common smart electronic devices include mobile phones, computers, tablets, sound systems, digital cameras, portable media players and various toys. However, since Type-C charging lines are relatively new device interfaces, some older smart electronic devices do not have Type-C interfaces. The most common of these older smart electronic devices are DC interfaces, such as notebook computers, desktop computer cases, digital cameras, portable media players and other products. Although few mobile phones in daily life have DC interfaces, many notebook computers and digital cameras with DC interfaces are still used frequently in life. These smart electronic devices with DC interfaces are very inconvenient whether they are charging themselves or powering other electronic devices. Self-charging requires carrying a DC interface power adapter, and charging other Type-C interface smart electronic devices requires an adapter, which does not provide a good user experience. However, Type-C charging lines are everywhere in life, so if the DC interfaces of these devices could charge Type-C interface smart electronic devices through Type-C charging lines, it would be very convenient. Practical new type content

[0005] To solve the problems in the prior art, the utility model provides a DC to Type-C charging circuit of intelligent adjustment output power, through setting up mutually coordinated DC interface input circuit, power voltage adjustment circuit, interface conversion main control circuit, MCU power supply circuit and Type-C interface output circuit in DC to Type-C charging circuit of intelligent adjustment output power, interface conversion main control circuit can adjust the final output power of Type-C interface output circuit according to the input power information of DC interface input circuit, can realize the function that DC interface input is converted to Type-C interface output and charges the smart electronic device of Type-C interface, and can intelligently adjust the output power of final Type-C interface according to the input power of DC interface, greatly improve the use experience of user, solve the problem that the electronic device with DC interface cannot directly charge the Type-C interface smart electronic device in the prior art.

[0006] The utility model provides a kind of DC conversion Type-C charging circuit of intelligent adjustment output power, including DC interface input circuit, power voltage adjustment circuit, interface conversion main control circuit, MCU power supply circuit and Type-C interface output circuit, the input end of DC interface input circuit can be connected DC interface charging head, the output end of DC interface input circuit is connected with the power voltage adjustment circuit, the MCU power supply circuit power supply, the output end of the MCU power supply circuit is connected with the interface conversion main control circuit power supply, the output end of the interface conversion main control circuit is connected with the power voltage adjustment circuit, the Type-C interface output circuit control connection, the output end of the power voltage adjustment circuit is connected with the input end of the Type-C interface output circuit, the output end of the Type-C interface output circuit can be connected Type-C interface intelligent electronic equipment, the interface conversion main control circuit can be according to the input power information of DC interface input circuit adjustment final output power of Type-C interface output circuit.

[0007] The utility model makes further improvement, interface conversion main control circuit is equipped with main control chip U3, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11 and resistance R12, wherein, main control chip U3 is equipped with 16 pins, the 15th pin of main control chip U3 is connected with the output end of MCU power supply circuit, the 13th pin of main control chip U3 is connected with the output end of DC interface input circuit, the first pin of main control chip U3 is connected with one end of resistance R8, the 16th pin of main control chip U3 is connected with one end of resistance R9, the other end of resistance R8 is connected with the other end of resistance R9, one end of resistance R7, the input end of Type-C interface output circuit, the 2nd pin of main control chip U3 is connected with one end of resistance R11, the 5th pin of main control chip U3 is connected with one end of resistance R12, the other end of resistance R11 is connected with the other end of resistance R12, one end of resistance R10, the input end of Type-C interface output circuit, the other end of resistance R10 is connected with the other end of resistance R7, the output end of MCU power supply circuit, the 9th pin of main control chip U3 is connected with the input end of Type-C interface output circuit, the 6th,11,12,14 pin of main control chip U3 is connected with the input end of power voltage adjustment circuit.

[0008] The utility model discloses further improve, the interface conversion main control circuit still be equipped with resistance R5, resistance R6, resistance R20 and emitting diode D2, wherein, the 7th pin of main control chip U3 is connected with the one end of resistance R5, the one end of resistance R6, the other end of resistance R5 is connected with the output of DC interface input circuit, the 10th pin of main control chip U3 is connected with the one end of resistance R20, the other end of resistance R20 is connected with the anode of emitting diode D2, the other end of resistance R6, the cathode of emitting diode D2 ground.

[0009] The utility model discloses further improve, the MCU power supply circuit is equipped with voltage stabilizing power supply chip U1, resistance R4, electric capacity C1, electric capacity C2 and electric capacity C3, wherein, voltage stabilizing power supply chip U1 is equipped with 3 pins, the 3rd pin of voltage stabilizing power supply chip U1 is connected with the one end of resistance R4, the one end of electric capacity C2, the other end of resistance R4 is connected with the output of DC interface input circuit, the 2nd pin of voltage stabilizing power supply chip U1 is connected with the one end of electric capacity C1, the one end of electric capacity C3, the 15th pin of main control chip U3, the other end of resistance R10, the other end of resistance R7, the other end of electric capacity C2, the other end of electric capacity C1, the other end of electric capacity C3 ground.

[0010] The utility model discloses further improve, the DC interface input circuit is equipped with interface DC female seat and resistance R3, the output of interface DC female seat is equipped with 3 pins, the input of interface DC female seat can connect DC interface charging head, the 2nd pin of interface DC female seat is connected with the one end of resistance R3, the 13th pin of main control chip U3, the other end of resistance R3 is connected with the 2nd pin of voltage stabilizing power supply chip U1, the 1st pin of interface DC female seat is connected with the input of power voltage adjusting circuit, the other end of resistance R5.

[0011] The utility model discloses further improve, the voltage adjustment circuit in power supply is equipped with voltage regulation chip U2, inductance L1, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, capacitor C9 and capacitor C10, voltage regulation chip U2 is equipped with 6 pins, voltage regulation chip U2's 3rd pin is connected with interface DC female seat's 1st pin, voltage regulation chip U2's 2nd pin is connected with inductance L1 one end, capacitor C9 one end, inductance L1's other end is connected with resistance R13 one end, capacitor C10 one end, Type-C interface output circuit's input, voltage regulation chip U2's 6th pin is connected with capacitor C9 other end, voltage regulation chip U2's 5th pin is connected with resistance R15 one end, main control chip U3's 11th pin, voltage regulation chip U2's 4th pin is connected with resistance R13 other end, resistance R14 one end, resistance R16 one end, resistance R17 one end, resistance R18 one end, capacitor C10 other end, resistance R16's other end is connected with main control chip U3's 14th pin, resistance R17's other end is connected with main control chip U3's 12th pin, resistance R18's other end is connected with main control chip U3's 6th pin, resistance R14 other end, resistance R15 other end ground.

[0012] The utility model discloses further improve, the voltage adjustment circuit in power supply still is equipped with capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C11, capacitor C12, capacitor C13, capacitor C14 and capacitor C15, wherein, capacitor C4 one end is connected with voltage regulation chip U2's 3rd pin, capacitor C5 one end, capacitor C6 one end, capacitor C7 one end, capacitor C8 one end, capacitor C11 one end is connected with inductance L1 other end, capacitor C12 one end, capacitor C13 one end, capacitor C14 one end, capacitor C15 one end, capacitor C4 other end, capacitor C5 other end, capacitor C6 other end, capacitor C7 other end, capacitor C8 other end, capacitor C11 other end, capacitor C12 other end, capacitor C13 other end, capacitor C14 other end, capacitor C15 other end ground.

[0013] The utility model discloses further improve, type -C interface output circuit is equipped with type -C interface CN2, triode Q2, field effect tube Q1, resistance R1, resistance R2 and stabilizing diode D1, the input of type -C interface CN2 is equipped with 16 pins, type -C interface CN2's output can connect type -C interface intelligent electronic equipment, type -C interface CN2's first B5 pin links to each other with resistance R8's other end, resistance R9's other end, resistance R7's one end, type -C interface CN2's first A5 pin links to each other with resistance R11's other end, resistance R12's other end, resistance R10's one end, type -C interface CN2's first A4, A9, B4, B9 pin links to each other with field effect tube Q1's drain, inductance L1's other end, field effect tube Q1's source links to each other with resistance R1's one end, stabilizing diode D1's negative pole, interface DC female seat's first pin, field effect tube Q1's grid links to each other with resistance R1's other end, stabilizing diode D1's positive pole, resistance R2's one end, resistance R2's other end links to each other with triode Q2 collector, triode Q2's base links to each other with main control chip U3's first 9 pin, triode Q2's emitter ground.

[0014] The utility model discloses further improve, the model of main control chip U3 is JSX2P05 or 20P02 or 2P05, the model of stabilizing power supply chip U1 is LDO-3.3V.

[0015] The utility model discloses further improve, the model of voltage regulation chip U2 is SGM61230 or JW5070.

[0016] Compared with the prior art, the utility model discloses an advantage is: provide a kind of DC conversion Type-C charging circuit of intelligent adjustment output power, by being set up mutually coordinated DC interface input circuit, power voltage adjustment circuit, interface conversion main control circuit, MCU power supply circuit and Type-C interface output circuit in the DC conversion Type-C charging circuit of intelligent adjustment output power, interface conversion main control circuit can adjust the final output power of Type-C interface output circuit according to the input power information of DC interface input circuit, can realize the function that DC interface input is converted Type-C interface output is the charging of Type-C interface intelligent electronic equipment, and can be according to the input power of DC interface intelligent adjustment final Type-C interface output power, it is very convenient to carry and use, safety is also high, satisfy the use demand of people, greatly improve the use experience of user, solve the problem that the electronic equipment of DC interface in prior art cannot directly charge Type-C interface intelligent electronic equipment. Attached Figure Description

[0017] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Fig. 1 This is a block diagram illustrating the principle of a DC-to-Type-C charging circuit with intelligent output power adjustment according to this utility model.

[0019] Fig. 2 This is a circuit diagram of a DC to Type-C charging circuit with intelligent output power adjustment according to the present invention. Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figs. 1-2The utility model provides a DC conversion Type-C charging circuit of intelligent adjustment output power, including DC interface input circuit, power voltage adjustment circuit, interface conversion main control circuit, MCU power supply circuit and Type-C interface output circuit, the input end of DC interface input circuit can connect DC interface charging head, the output end of DC interface input circuit is connected with power voltage adjustment circuit, MCU power supply circuit power supply, the output end of MCU power supply circuit is connected with interface conversion main control circuit power supply, the output end of interface conversion main control circuit is connected with power voltage adjustment circuit, Type-C interface output circuit control, the output end of power voltage adjustment circuit is connected with the input end of Type-C interface output circuit, the output end of Type-C interface output circuit can connect Type-C interface intelligent electronic equipment, in this embodiment, interface conversion main control circuit can adjust the final output power of Type-C interface output circuit according to the input power information of DC interface input circuit, can realize DC interface input conversion Type-C interface output for the function of Type-C interface intelligent electronic equipment charging, and can adjust the output power of final Type-C interface according to the input power of DC interface, is very convenient to carry and use, and the security is also high, satisfies people's use demand, has greatly promoted the use experience of user.

[0024] As Fig. 2As shown in the figure, the interface conversion main control circuit is provided with a main control chip U3, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11 and a resistor R12. The main control chip U3 is of a model of JSX2P05 or 20P02 or 2P05, and is provided with 16 pins. The 15th pin of the main control chip U3 is connected with the output end of the MCU power supply circuit, the 13th pin of the main control chip U3 is connected with the output end of the DC interface input circuit, the 1st pin of the main control chip U3 is connected with one end of the resistor R8, the 16th pin of the main control chip U3 is connected with one end of the resistor R9, the other end of the resistor R8 is connected with the other end of the resistor R9, one end of the resistor R7 and the input end of the Type-C interface output circuit, the 2nd pin of the main control chip U3 is connected with one end of the resistor R11, the 5th pin of the main control chip U3 is connected with one end of the resistor R12, the other end of the resistor R11 is connected with the other end of the resistor R12, one end of the resistor R10 and the input end of the Type-C interface output circuit, the other end of the resistor R10 is connected with the other end of the resistor R7 and the output end of the MCU power supply circuit, the 9th pin of the main control chip U3 is connected with the input end of the Type-C interface output circuit, and the 6th, 11th, 12th and 14th pins of the main control chip U3 are connected with the input end of the power voltage adjustment circuit. The interface conversion main control circuit is further provided with a resistor R5, a resistor R6, a resistor R20 and a light emitting diode D2. The 7th pin of the main control chip U3 is connected with one end of the resistor R5 and one end of the resistor R6, the other end of the resistor R5 is connected with the output end of the DC interface input circuit, the 10th pin of the main control chip U3 is connected with one end of the resistor R20, the other end of the resistor R20 is connected with the positive electrode of the light emitting diode D2, and the other end of the resistor R6 and the negative electrode of the light emitting diode D2 are grounded. In this embodiment, the interface conversion main control circuit is used to adjust the final output power of the Type-C interface output circuit according to the input power information of the DC interface input circuit.

[0025] As shown in the figure, Fig. 2 The MCU power supply circuit is provided with a voltage stabilizing power supply chip U1, a resistor R4, a capacitor C1, a capacitor C2 and a capacitor C3. The voltage stabilizing power supply chip U1 is of a model of LDO-3.3V, and is provided with 3 pins. The 3rd pin of the voltage stabilizing power supply chip U1 is connected with one end of the resistor R4 and one end of the capacitor C2, the other end of the resistor R4 is connected with the output end of the DC interface input circuit, the 2nd pin of the voltage stabilizing power supply chip U1 is connected with one end of the capacitor C1, one end of the capacitor C3, the 15th pin of the main control chip U3, the other end of the resistor R10 and the other end of the resistor R7, and the other end of the capacitor C2, the other end of the capacitor C1 and the other end of the capacitor C3 are grounded. In this embodiment, the MCU power supply circuit is used to supply power for the main control chip U3 to work.

[0026] As shown in the figure,Fig. 2 As shown, the DC interface input circuit is provided with an interface DC socket and a resistor R3, the output end of the interface DC socket is provided with three pins, the input end of the interface DC socket can be connected with a DC interface charging head, the second pin of the interface DC socket is connected with one end of the resistor R3 and the 13th pin of the main control chip U3, the other end of the resistor R3 is connected with the second pin of the voltage stabilizing supply chip U1, and the first pin of the interface DC socket is connected with the input end of the power voltage adjusting circuit and the other end of the resistor R5. In the embodiment, the DC interface input circuit is used for connecting the DC interface charging head and supplying power for the power voltage adjusting circuit and the interface conversion main control circuit.

[0027] As shown in the figure, the DC interface input circuit is provided with an interface DC socket and a resistor R3, the output end of the interface DC socket is provided with three pins, the input end of the interface DC socket can be connected with a DC interface charging head, the second pin of the interface DC socket is connected with one end of the resistor R3 and the 13th pin of the main control chip U3, the other end of the resistor R3 is connected with the second pin of the voltage stabilizing supply chip U1, and the first pin of the interface DC socket is connected with the input end of the power voltage adjusting circuit and the other end of the resistor R5. In the embodiment, the DC interface input circuit is used for connecting the DC interface charging head and supplying power for the power voltage adjusting circuit and the interface conversion main control circuit. Fig. 2As shown, the power voltage adjusting circuit is provided with a voltage adjusting chip U2, an inductor L1, resistors R13, R14, R15, R16, R17, R18, capacitors C9 and C10. The voltage adjusting chip U2 is of SGM61230 or JW5070. The third pin of the voltage adjusting chip U2 is connected with the first pin of the interface DC female seat. The second pin of the voltage adjusting chip U2 is connected with one end of the inductor L1 and one end of the capacitor C9. The other end of the inductor L1 is connected with one end of the resistor R13, one end of the capacitor C10 and the input end of the Type-C interface output circuit. The sixth pin of the voltage adjusting chip U2 is connected with the other end of the capacitor C9. The fifth pin of the voltage adjusting chip U2 is connected with one end of the resistor R15 and the eleventh pin of the main control chip U3. The fourth pin of the voltage adjusting chip U2 is connected with the other end of the resistor R13, one end of the resistor R14, one end of the resistor R16, one end of the resistor R17, one end of the resistor R18 and the other end of the capacitor C10. The other end of the resistor R16 is connected with the fourteenth pin of the main control chip U3. The other end of the resistor R17 is connected with the twelfth pin of the main control chip U3. The other end of the resistor R18 is connected with the sixth pin of the main control chip U3. The other end of the resistor R14 and the other end of the resistor R15 are grounded. The power voltage adjusting circuit is further provided with capacitors C4, C5, C6, C7, C8, C11, C12, C13, C14 and C15. One end of the capacitor C4 is connected with the third pin of the voltage adjusting chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the capacitor C7 and one end of the capacitor C8. One end of the capacitor C11 is connected with the other end of the inductor L1, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14 and one end of the capacitor C15. The other end of the capacitor C4, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the capacitor C11, the other end of the capacitor C12, the other end of the capacitor C13, the other end of the capacitor C14 and the other end of the capacitor C15 are grounded. In the embodiment, the power voltage adjusting circuit is used to supply power for the Type-C interface output circuit according to the control information of the interface conversion main control circuit.

[0028] As Fig. 2As shown, the Type-C interface output circuit is provided with a Type-C interface CN2, a transistor Q2, a field effect transistor Q1, a resistor R1, a resistor R2 and a voltage stabilizing diode D1. The input end of the Type-C interface CN2 is provided with 16 pins. The output end of the Type-C interface CN2 can be connected to a Type-C interface intelligent electronic device. The B5 pin of the Type-C interface CN2 is connected to the other end of the resistor R8, the other end of the resistor R9 and one end of the resistor R7. The A5 pin of the Type-C interface CN2 is connected to the other end of the resistor R11, the other end of the resistor R12 and one end of the resistor R10. The A4, A9, B4 and B9 pins of the Type-C interface CN2 are connected to the drain of the field effect transistor Q1 and the other end of the inductor L1. The source of the field effect transistor Q1 is connected to one end of the resistor R1, the negative electrode of the voltage stabilizing diode D1 and the first pin of the interface DC socket. The gate of the field effect transistor Q1 is connected to the other end of the resistor R1, the positive electrode of the voltage stabilizing diode D1 and one end of the resistor R2. The other end of the resistor R2 is connected to the collector of the transistor Q2. The base of the transistor Q2 is connected to the ninth pin of the main control chip U3. The emitter of the transistor Q2 is grounded. In this embodiment, the Type-C interface output circuit is used to charge the Type-C interface intelligent electronic device according to the control information of the interface conversion main control circuit.

[0029] Working principle: when the interface DC socket is connected to the DC interface charging head, the first pin of the interface DC socket is connected to the third pin of the voltage stabilizing power supply chip U1 through the resistor R4 current limiting. The voltage stabilizing power supply chip U1 is voltage regulated. The capacitors C2, C1 and C3 filter and output 3.3V voltage to the fifteenth pin of the main control chip U3. The main control chip U3 starts to work. The thirteenth pin of the main control chip U3 searches the voltage of the second pin in the middle of the interface DC socket to judge the power of the input power supply.

[0030] The first step: if the DC interface charging head has no middle foot, the voltage recognized by the 13th pin of the main control chip U3 is close to 3.3V, the main control chip U3 starts the initial power of 20W, through the 1st pin of the main control chip U3, the resistance R8, the 16th pin of the main control chip U3, the resistance R9, the resistance R7, the B5 pin of the Type-C interface CN2 to the handheld device (C port computer, mobile phone and other devices) to claim power 20W; through the 2nd pin of the main control chip U3, the resistance R11, the 5th pin of the main control chip U3, the resistance R12, the resistance R10, the A5 pin of the Type-C interface CN2 to the handheld device (C port computer, mobile phone and other devices) to claim 5V / 9V / 12V / 15V / 20V, the handheld device will communicate with the Type-C communication protocol; after the main control chip U3 receives the instruction, the 14th / 12th / 6th pin of the main control chip U3 automatically pulls down the resistance R16 / resistance R17 / resistance R18 to change the feedback voltage of the voltage adjustment chip U2 to change the output voltage, at the same time the 11th pin of the main control chip U3 will give high level to the 5th pin of the voltage adjustment chip U2, the voltage adjustment chip U2 starts to work, the 1st pin of the DC female seat power supply positive end is filtered by the capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide smooth power to the 3rd pin of the voltage adjustment chip U2, the 2nd pin (SW) of the voltage adjustment chip U2 is filtered by the inductor L1 (10uH), and the capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, the Type-C interface CN2 provides power to the handheld device; if the handheld device communication requires current above 20V 3A, the 9th pin of the main control chip U3 gives high level to open the triode Q2 through the resistance R2, the field effect tube Q1 is turned on, the input is directly shorted to the output end, and the 20V current does not pass through the voltage adjustment chip U2 to work, so that the power of the inductor L1 and the voltage adjustment chip U2 can be reduced to achieve small size, the 7th pin of the main control chip U3 detects the input voltage feedback to the main control chip U3 for auxiliary work, so that the main control chip U3 sends the highest voltage information to the handheld device, and the 10th pin of the main control chip U3 drives the light emitting diode D2 through the resistance R20 to indicate normal work.

[0031] The second step: the voltage recognized by the 13-pin of the main control chip U3 is close to 3.3V level, and the 20W initial power is started to work normally, and then the 30W power is started. Through the 1st pin of the main control chip U3, the resistance R8, the 16th pin of the main control chip U3, the resistance R9, the resistance R7, and the B5 pin of the Type-C interface CN2, the 30W power is declared to the handheld device (C-port computer, mobile phone and other devices); through the 2nd pin of the main control chip U3, the resistance R11, the 5th pin of the main control chip U3, the resistance R12, the resistance R10, and the A5 pin of the Type-C interface CN2, the 5V / 9V / 12V / 15V / 20V is declared to the handheld device, and the handheld device communicates with the Type-C communication protocol; after the main control chip U3 receives the instruction, the 14 / 12 / 6 pins of the main control chip U3 automatically pull down the resistance R16 / the resistance R17 / the resistance R18 to change the feedback voltage of the voltage adjustment chip U2 to change the output voltage, and the 11th pin of the main control chip U3 gives a high level to the 5th pin of the voltage adjustment chip U2, and the voltage adjustment chip U2 starts to work. The 1st pin of the DC female seat power supply positive end is filtered by the capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide stable power to the 3rd pin of the voltage adjustment chip U2, and the 2nd pin (SW) of the voltage adjustment chip U2 is filtered by the inductor L1 (10uH) from the capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, and the Type-C interface CN2 provides power to the handheld device; if the handheld device communication requires current above 20V 3A, the 9th pin of the main control chip U3 gives a high level to open the triode Q2 through the resistance R2, and the field effect tube Q1 is turned on to directly short the input to the output, so that the 20V current does not pass through the voltage adjustment chip U2 to work, which can reduce the power of the inductor L1 and the voltage adjustment chip U2 to achieve small size. The 7th pin of the main control chip U3 detects the input voltage feedback to the main control chip U3 for auxiliary work, so that the main control chip U3 sends the highest voltage information to the handheld device, and the 10th pin of the main control chip U3 drives the light emitting diode D2 through the resistance R20 to indicate normal work.

[0032] The third step: the 13-pin of the main control chip U3 starts 30W power work normally after detecting the proximity of 3.3V level, and then starts 45W power. Through the 1st pin of the main control chip U3, resistance R8, the 16th pin of the main control chip U3, resistance R9, resistance R7, and the B5 pin of the Type-C interface CN2, the power of 45W is declared to the handheld device (C-port computer, mobile phone, and other devices); through the 2nd pin of the main control chip U3, resistance R11, the 5th pin of the main control chip U3, resistance R12, resistance R10, and the A5 pin of the Type-C interface CN2, 5V / 9V / 12V / 15V / 20V is declared to the handheld device, and the handheld device communicates with the Type-C communication protocol; after receiving the instruction, the main control chip U3 automatically pulls down resistance R16 / resistance R17 / resistance R18 through the 14th / 12th / 6th pin to change the feedback voltage of the voltage adjustment chip U2 to change the output voltage. At the same time, the 11th pin of the main control chip U3 gives a high level to the 5th pin of the voltage adjustment chip U2, and the voltage adjustment chip U2 starts working. The 1st pin of the DC female seat power supply positive terminal is filtered by capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide stable power to the 3rd pin of the voltage adjustment chip U2. The 2nd pin (SW) of the voltage adjustment chip U2 is filtered by inductor L1 (10uH) from capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, and the Type-C interface CN2 provides power to the handheld device. If the handheld device communication requires a current of 20V 3A or more, the 9th pin of the main control chip U3 gives a high level to open the triode Q2 through resistance R2, and the field effect tube Q1 is turned on to directly short the input to the output, so that the 20V current does not pass through the voltage adjustment chip U2 to work, which can reduce the power of inductor L1 and voltage adjustment chip U2 to achieve small size. The 7th pin of the main control chip U3 detects the input voltage feedback to the internal auxiliary work of the main control chip U3 to send the highest voltage information of the handheld device to the main control chip U3. The 10th pin of the main control chip U3 drives the light-emitting diode D2 through resistance R20 to indicate normal work.

[0033] The fourth step: after the 13-pin of the main control chip U3 detects the proximity of 3.3V level and the 45W power works normally, it will start 65W power. Through the 1st pin of the main control chip U3, resistance R8, the 16th pin of the main control chip U3, resistance R9, resistance R7, and the B5 pin of the Type-C interface CN2, it claims to the handheld device (C-port computer, mobile phone, and other devices) that the power is 65W. Through the 2nd pin of the main control chip U3, resistance R11, the 5th pin of the main control chip U3, resistance R12, resistance R10, and the A5 pin of the Type-C interface CN2, it claims to the handheld device (C-port computer, mobile phone, and other devices) that there is 5V / 9V / 12V / 15V / 20V, and the handheld device will communicate with the Type-C communication protocol. After the main control chip U3 receives the instruction, it automatically pulls down resistance R16 / resistance R17 / resistance R18 through the 14th / 12th / 6th pin of the main control chip U3 to change the feedback voltage of the voltage adjustment chip U2 to change the output voltage. At the same time, the 11th pin of the main control chip U3 will give a high level to the 5th pin of the voltage adjustment chip U2, and the voltage adjustment chip U2 starts to work. The 1st pin of the DC female seat power supply positive terminal is filtered by capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide stable power to the 3rd pin of the voltage adjustment chip U2. The 2nd pin (SW) of the voltage adjustment chip U2 is filtered by inductor L1 (10uH) from capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, and the Type-C interface CN2 provides power to the handheld device. If the handheld device communication requires 20V 3A or more current, the 9th pin of the main control chip U3 gives a high level to open the triode Q2 through resistance R2, and the field effect tube Q1 is turned on to directly short the input to the output, so that the 20V current does not pass through the voltage adjustment chip U2 to work. In this way, the power of inductor L1 and voltage adjustment chip U2 can be reduced to achieve small size. The 7th pin of the main control chip U3 detects the input voltage feedback to the main control chip U3 for auxiliary work, so that the main control chip U3 sends the highest voltage information to the handheld device. The 10th pin of the main control chip U3 drives the light-emitting diode D2 through resistance R20 to indicate normal work.

[0034] The fifth step: the 13-pin of the main control chip U3 starts 65W power work normally after detecting the proximity of 3.3V level, and then starts 100W power. Through the 1st pin of the main control chip U3, resistance R8, the 16th pin of the main control chip U3, resistance R9, resistance R7, and the B5 pin of Type-C interface CN2, it claims to the handheld device (C-port computer, mobile phone and other devices) that the power is 65W. Through the 2nd pin of the main control chip U3, resistance R11, the 5th pin of the main control chip U3, resistance R12, resistance R10, and the A5 pin of Type-C interface CN2, it claims to the handheld device (C-port computer, mobile phone and other devices) that there is 5V / 9V / 12V / 15V / 20V, and the handheld device will communicate with Type-C communication protocol. After receiving the instruction, the main control chip U3 automatically pulls down resistance R16 / resistance R17 / resistance R18 through the 14th / 12th / 6th pin of the main control chip U3 to change the feedback voltage of voltage regulation chip U2 to change the output voltage. At the same time, the 11th pin of the main control chip U3 will give a high level to the 5th pin of voltage regulation chip U2, and the voltage regulation chip U2 starts to work. The 1st pin of the DC female seat power supply positive terminal is filtered by capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide stable power to the 3rd pin of voltage regulation chip U2. The 2nd pin (SW) of voltage regulation chip U2 is filtered by inductor L1 (10uH) from capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, and Type-C interface CN2 provides power to the handheld device. If the handheld device communication requires current above 20V 3A, the 9th pin of the main control chip U3 gives a high level to open the triode Q2 through resistance R2, and the field effect tube Q1 is turned on to directly short the input to the output, so that the 20V current does not pass through the voltage regulation chip U2 to work, which can reduce the power of inductor L1 and voltage regulation chip U2 to achieve small size. The 7th pin of the main control chip U3 detects the input voltage feedback to the internal auxiliary work of the main control chip U3 to send the highest voltage information to the handheld device. The 10th pin of the main control chip U3 drives the light-emitting diode D2 through resistance R20 to indicate normal work.

[0035] The sixth step: the 13th pin of the main control chip U3 starts to work normally after detecting the proximity of 3.3V level, and then starts 130W / 140W power. Through the 1st pin of the main control chip U3, the resistance R8, the 16th pin of the main control chip U3, the resistance R9, the resistance R7, and the B5 pin of the Type-C interface CN2, it claims to have 65W power to the handheld device (C-port computer, mobile phone and other devices); through the 2nd pin of the main control chip U3, the resistance R11, the 5th pin of the main control chip U3, the resistance R12, the resistance R10, and the A5 pin of the Type-C interface CN2, it claims to have 5V / 9V / 12V / 15V / 20V to the handheld device, and the handheld device will communicate according to the Type-C communication protocol. After the main control chip U3 receives the instruction, it automatically pulls down the resistance R16 / resistance R17 / resistance R18 through the 14th / 12th / 6th pin of the main control chip U3 to change the feedback voltage of the voltage regulation chip U2 to change the output voltage. At the same time, the 11th pin of the main control chip U3 will give a high level to the 5th pin of the voltage regulation chip U2, and the voltage regulation chip U2 starts to work. The 1st pin of the DC female seat power supply is filtered by the capacitor C4 / capacitor C5 / capacitor C6 / capacitor C7 / capacitor C8 to provide stable power to the 3rd pin of the voltage regulation chip U2. The 2nd pin (SW) of the voltage regulation chip U2 is filtered by the inductor L1 (10uH) from the capacitor C11 / capacitor C12 / capacitor C13 / capacitor C14 / capacitor C15, and the Type-C interface CN2 provides power to the handheld device. If the handheld device communication requires 20V 3A or more current, the 9th pin of the main control chip U3 gives a high level to open the triode Q2 through the resistance R2, and the field effect tube Q1 is turned on to directly short the input to the output, so that the 20V current does not pass through the voltage regulation chip U2 to work, which can reduce the power of the inductor L1 and the voltage regulation chip U2 to achieve small size. The 7th pin of the main control chip U3 detects the input voltage feedback to the main control chip U3 for auxiliary work, so that the main control chip U3 sends the highest voltage information to the handheld device. The 10th pin of the main control chip U3 drives the light emitting diode D2 through the resistance R20 to indicate normal work.

[0036] If the working pull current of the second step 30W is overloaded, the first step 20W is reset and restarted to work; if the working pull current of the third step 45W is overloaded, the second step 30W is reset and restarted to work; if the working pull current of the fourth step 65W is overloaded, the third step 45W is reset and restarted to work; if the working pull current of the fifth step 100W is overloaded, the fourth step 65W is reset and restarted to work; if the working pull current of the sixth step 140W is overloaded, the fifth step 100W is reset and restarted to work; the main control chip U3 can remember the normal working step before the failure to work. In this way, the DC interface charger without the intermediate foot (recognition) can also realize the intelligent judgment of the input power information of the DC interface input circuit to claim the maximum power of the handheld device, and realize the intelligent and automatic adjustment of the output power.

[0037] As can be seen from the above, the utility model provides a DC conversion Type-C charging circuit of intelligent adjustment output power, through setting mutually coordinated DC interface input circuit, power voltage adjustment circuit, interface conversion main control circuit, MCU power supply circuit and Type-C interface output circuit in DC conversion Type-C charging circuit of intelligent adjustment output power, interface conversion main control circuit can adjust the final output power of Type-C interface output circuit according to the input power information of DC interface input circuit, can realize the function that DC interface input conversion Type-C interface output charges the intelligent electronic device of Type-C interface, and can adjust the output power of final Type-C interface according to the input power of DC interface, is very convenient to carry and use, and the safety is also high, satisfies people's use demand, has improved the use experience of user greatly, has solved the problem that the electronic device with DC interface in prior art cannot directly charge the Type-C interface intelligent electronic device.

[0038] The above specific embodiment is the preferred embodiment of the utility model, and the specific implementation range of the utility model is not limited by this, and the range of the utility model includes but is not limited to the specific embodiment, and equivalent changes made according to the utility model are within the protection range of the utility model.

Claims

1. A DC-to-Type-C charging circuit with intelligent output power adjustment, characterized in that: The interface conversion main control circuit is connected with the DC interface input circuit, the power supply voltage adjustment circuit, the MCU power supply circuit and the Type-C interface output circuit, the input end of the DC interface input circuit can be connected with the DC interface charging head, the output end of the DC interface input circuit is connected with the power supply voltage adjustment circuit and the MCU power supply circuit, the output end of the MCU power supply circuit is connected with the interface conversion main control circuit, the output end of the interface conversion main control circuit is connected with the power supply voltage adjustment circuit and the Type-C interface output circuit, the output end of the power supply voltage adjustment circuit is connected with the input end of the Type-C interface output circuit, the output end of the Type-C interface output circuit can be connected with the Type-C interface intelligent electronic device, and the interface conversion main control circuit can adjust the final output power of the Type-C interface output circuit according to the input power information of the DC interface input circuit. 2.The DC-to-Type-C charging circuit with intelligent adjustment of output power of claim 1, wherein: The interface conversion main control circuit is connected with the DC interface input circuit, the power supply voltage adjustment circuit, the MCU power supply circuit and the Type-C interface output circuit, the input end of the DC interface input circuit can be connected with the DC interface charging head, the output end of the DC interface input circuit is connected with the power supply voltage adjustment circuit and the MCU power supply circuit, the output end of the MCU power supply circuit is connected with the interface conversion main control circuit, the output end of the interface conversion main control circuit is connected with the power supply voltage adjustment circuit and the Type-C interface output circuit, the output end of the power supply voltage adjustment circuit is connected with the input end of the Type-C interface output circuit, the output end of the Type-C interface output circuit can be connected with the Type-C interface intelligent electronic device, and the interface conversion main control circuit can adjust the final output power of the Type-C interface output circuit according to the input power information of the DC interface input circuit. 3.The DC-to-Type-C charging circuit with intelligent adjustment of output power of claim 2, wherein: The interface conversion main control circuit is connected with the DC interface input circuit, the power supply voltage adjustment circuit, the MCU power supply circuit and the Type-C interface output circuit, the input end of the DC interface input circuit can be connected with the DC interface charging head, the output end of the DC interface input circuit is connected with the power supply voltage adjustment circuit and the MCU power supply circuit, the output end of the MCU power supply circuit is connected with the interface conversion main control circuit, the output end of the interface conversion main control circuit is connected with the power supply voltage adjustment circuit and the Type-C interface output circuit, the output end of the power supply voltage adjustment circuit is connected with the input end of the Type-C interface output circuit, the output end of the Type-C interface output circuit can be connected with the Type-C interface intelligent electronic device, and the interface conversion main control circuit can adjust the final output power of the Type-C interface output circuit according to the input power information of the DC interface input circuit. 4.The DC-to-Type-C charging circuit with intelligent adjustment of output power of claim 3, wherein: The MCU power supply circuit is internally provided with voltage stabilizing power supply chip U1, resistor R4, capacitor C1, capacitor C2 and capacitor C3, wherein the voltage stabilizing power supply chip U1 is provided with three pins, the third pin of the voltage stabilizing power supply chip U1 is connected with one end of the resistor R4 and one end of the capacitor C2, the other end of the resistor R4 is connected with the output end of the DC interface input circuit, the second pin of the voltage stabilizing power supply chip U1 is connected with one end of the capacitor C1, one end of the capacitor C3, the 15th pin of the main control chip U3, the other end of the resistor R10 and the other end of the resistor R7, the other end of the capacitor C2, the other end of the capacitor C1 and the other end of the capacitor C3 are grounded. 5.The DC-to-Type-C charging circuit with smart adjusted output power of claim 4, wherein: The DC interface input circuit is internally provided with interface DC female seat and resistor R3, the output end of the interface DC female seat is provided with three pins, the input end of the interface DC female seat can be connected with DC interface charging head, the second pin of the interface DC female seat is connected with one end of the resistor R3 and the 13th pin of the main control chip U3, the other end of the resistor R3 is connected with the second pin of the voltage stabilizing power supply chip U1, the first pin of the interface DC female seat is connected with the input end of the power voltage adjusting circuit and the other end of the resistor R5. 6.The DC-to-Type-C charging circuit with smart adjusted output power of claim 5, wherein: The power voltage adjusting circuit is internally provided with voltage adjusting chip U2, inductor L1, resistor R13, resistor R14, resistor R15, resistor R16, resistor R17, resistor R18, capacitor C9 and capacitor C10, the voltage adjusting chip U2 is provided with six pins, the third pin of the voltage adjusting chip U2 is connected with the first pin of the interface DC female seat, the second pin of the voltage adjusting chip U2 is connected with one end of the inductor L1 and one end of the capacitor C9, the other end of the inductor L1 is connected with one end of the resistor R13, one end of the capacitor C10 and the input end of the Type-C interface output circuit, the sixth pin of the voltage adjusting chip U2 is connected with the other end of the capacitor C9, the fifth pin of the voltage adjusting chip U2 is connected with one end of the resistor R15 and the 11th pin of the main control chip U3, the fourth pin of the voltage adjusting chip U2 is connected with the other end of the resistor R13, one end of the resistor R14, one end of the resistor R16, one end of the resistor R17, one end of the resistor R18 and the other end of the capacitor C10, the other end of the resistor R16 is connected with the 14th pin of the main control chip U3, the other end of the resistor R17 is connected with the 12th pin of the main control chip U3, the other end of the resistor R18 is connected with the 6th pin of the main control chip U3, the other end of the resistor R14 and the other end of the resistor R15 are grounded. 7.The DC-to-Type-C charging circuit with smart adjusted output power of claim 6, wherein: Capacitors C4, C5, C6, C7, C8, C11, C12, C13, C14 and C15 are further arranged in the power voltage adjusting circuit, one end of the capacitor C4 is connected with the third pin of the voltage adjusting chip U2, one end of the capacitor C5, one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8, one end of the capacitor C11 is connected with the other end of the inductor L1, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14, one end of the capacitor C15, the other end of the capacitor C4, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the capacitor C11, the other end of the capacitor C12, the other end of the capacitor C13, the other end of the capacitor C14, the other end of the capacitor C15 are grounded. 8.The DC-to-Type-C charging circuit with smart adjusted output power of claim 7, wherein: The Type-C interface output circuit is provided with a Type-C interface CN2, a transistor Q2, a field effect transistor Q1, resistors R1 and R2 and a voltage stabilizing diode D1, the input end of the Type-C interface CN2 is provided with 16 pins, the output end of the Type-C interface CN2 can be connected with a Type-C interface intelligent electronic device, the B5 pin of the Type-C interface CN2 is connected with the other end of the resistor R8, the other end of the resistor R9 and one end of the resistor R7, the A5 pin of the Type-C interface CN2 is connected with the other end of the resistor R11, the other end of the resistor R12 and one end of the resistor R10, the A4, A9, B4 and B9 pins of the Type-C interface CN2 are connected with the drain of the field effect transistor Q1 and the other end of the inductor L1, the source of the field effect transistor Q1 is connected with one end of the resistor R1, the negative electrode of the voltage stabilizing diode D1 and the first pin of the interface DC female socket, the gate of the field effect transistor Q1 is connected with the other end of the resistor R1, the positive electrode of the voltage stabilizing diode D1 and one end of the resistor R2, the other end of the resistor R2 is connected with the collector of the transistor Q2, the base of the transistor Q2 is connected with the ninth pin of the main control chip U3, the emitter of the transistor Q2 is grounded. 9.The DC-to-Type-C charging circuit with smart adjusted output power of claim 8, wherein: The model of the main control chip U3 is JSX2P05 or 20P02 or 2P05, and the model of the voltage stabilizing power supply chip U1 is LDO-3.3V. 10.The DC-to-Type-C charging circuit with smart adjusted output power of claim 9, wherein: The model of the voltage adjusting chip U2 is SGM61230 or JW5070.

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