Multi-output interface PD fast charge control circuit

Abstract

The utility model provides a multi-output interface PD fast charge control circuit, which relates to the technical field of power supplies and comprises an AC-DC (alternating current-direct current) power supply circuit. The first main control circuit is in communication connection with a first fast charging interface used for being electrically connected with a load, the first main control circuit is electrically connected with the control end of a switching tube, one end of the switching tube is electrically connected with the output end of the AC-DC power supply circuit, and the other end of the switching tube is electrically connected with the power supply end of the first fast charging interface; the AC-DC power supply circuit is electrically connected with the power supply end of the second main control circuit through a step-down power supply circuit, the second main control circuit is in communication connection with a plurality of second quick charge interfaces used for being electrically connected with a load, and the second main control circuit is in communication connection with the first main control circuit. The power output to the first fast charging interface is controlled by controlling the on-off of the switching tube through the PWM signal of the first main control circuit, so that a DC-DC module is omitted, useless loss is reduced, and the output efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, and in particular to a multi-output interface PD fast charging control circuit. Background Art

[0002] With the development of science and technology, there are more and more charging devices, and different charging devices require different charging power. In the prior art, there are fast charging devices with multiple output interfaces. Such devices have built-in power distribution modules to adjust the power output of each interface. In order to facilitate power distribution, the existing power distribution modules all build a DC-DC module circuit between the main control circuit and each output interface, and use the DC-DC module to bridge the power supply of multiple protocol chips to achieve multi-channel output of different voltages, thereby realizing power distribution between multiple PD fast charging ports.

[0003] However, this design has two defects because it requires the DC-DC module to consume a certain amount of power itself: first, the standby power consumption of the whole machine power supply increases; second, the output efficiency of the whole machine will decrease. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the standby power consumption of the whole machine in the prior art is high and the output efficiency is low. In order to overcome the above defects of the prior art, the utility model provides a multi-output interface PD fast charging control circuit.

[0005] The utility model provides a multi-output interface PD fast charging control circuit, comprising:

[0006] AC-DC power supply circuit;

[0007] A first main control circuit, wherein the output end of the AC-DC power supply circuit is electrically connected to the power supply end of the first main control circuit, the first main control circuit is communicatively connected to a first fast charging interface for electrically connecting to a load, the first main control circuit is electrically connected to the control end of a switch tube, one end of the switch tube is electrically connected to the output end of the AC-DC power supply circuit, and the other end of the switch tube is electrically connected to the power supply end of the first fast charging interface; the first main control circuit controls the PWM signal to be output to the control end of the switch tube according to the load power supply demand with the protocol fed back by the first fast charging interface;

[0008] The second main control circuit, the output end of the AC-DC power supply circuit is electrically connected to the power supply end of the second main control circuit through a step-down power supply circuit, the second main control circuit is communicatively connected to a plurality of second fast charging interfaces for electrically connecting to the load, and the second main control circuit is communicatively connected to the first main control circuit.

[0009] Compared with the prior art, a multi-output interface PD fast charging control circuit of the present application has the following advantages: By controlling the on and off of a switching transistor through the PWM signal of the first main control circuit, the power output to the first fast charging interface is controlled, eliminating the DC-DC module, reducing peripheral components, reducing the useless loss of the whole machine, and improving the output efficiency of the whole machine.

[0010] In a possible implementation, it further includes a signal loop for feeding back whether the load electrically connected to the first fast charging interface is operating normally, and the first main control circuit is electrically connected to the input end of the signal loop;

[0011] The AC-DC power supply circuit includes a power supply circuit, a power control circuit, and a transformer L3. The input end of the power supply circuit is electrically connected to the live wire and the neutral wire. The output end of the power supply circuit is electrically connected to the primary side of the transformer L3. The secondary side of the transformer L3 is respectively electrically connected to the power supply end of the first main control circuit, the power supply end of the first fast charging interface, and the input end of the step-down power supply circuit. The input end of the power control circuit is electrically connected to the power supply circuit, the output end of the power control circuit is electrically connected to the primary side of the transformer L3, and the output end of the signal loop is electrically connected to the power control circuit.

[0012] Compared with the prior art, adopting the above technical solution can timely feedback whether the load connected to the first fast charging interface is operating normally, and avoid damage to the power supply and the load caused by abnormal power supply.

[0013] In a possible implementation, the signal loop includes a sixteenth resistor, a seventeenth resistor, an eighth capacitor, and an optocoupler U4. The secondary side of the transformer L3 is connected in series with the seventeenth resistor and the sixteenth resistor and then electrically connected to the negative electrode of the optocoupler U4. The eighth capacitor is connected in parallel across the resistor R7. The connection end of the seventeenth resistor and the sixteenth resistor is electrically connected to the positive electrode of the optocoupler U4. The negative electrode of the optocoupler U4 is electrically connected to the first main control circuit. The emitter of the optocoupler U4 is grounded. The collector of the optocoupler U4 is electrically connected to the voltage feedback end of the power control circuit, and the voltage feedback end of the power control circuit is grounded through a sixth capacitor.

[0014] Compared with the prior art, by establishing a connection between the optocoupler and the power control circuit, when the load is operating normally, the optocoupler is turned on and outputs a low level, and the power control circuit can operate normally; when the load is operating abnormally, the optocoupler is turned off and outputs a high level, and the power control circuit cuts off the power supply.

[0015] In a possible implementation, the switching transistor is a first MOS transistor. The first main control circuit is electrically connected to the gate of the first MOS transistor. The positive electrode of the output end of the AC-DC power supply circuit is electrically connected to the drain of the first MOS transistor;

[0016] The source of the first MOS transistor is electrically connected to the positive electrode of the first fast charging interface, and the negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the negative electrode of the first fast charging interface through a second resistor.

[0017] Compared with the prior art, using MOS as the switching transistor has low cost and fast response.

[0018] In a possible implementation manner, a sixth capacitor is connected in parallel across the two ends of the second resistor, and two IO ports of the first main control circuit are respectively electrically connected to the two ends of the second resistor for collecting the voltage across the second resistor.

[0019] Compared with the prior art, by collecting the voltage across the second resistor and combining it with the current of the second resistor itself, it is convenient to obtain the actual power output to the first fast charging interface.

[0020] In a possible implementation manner, the buck power supply circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a second MOS transistor, a first diode, a second diode, and a first inductor;

[0021] The positive electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the drain of the second MOS transistor, the source of the second MOS transistor is electrically connected to the power supply terminal of the second main control circuit through a first inductor, and the drain of the second MOS transistor is electrically connected to the source of the second MOS transistor through a series connection of a twelfth resistor and a fourteenth capacitor; the power supply terminal of the second main control circuit is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through an eighth capacitor, the power supply terminal of the second main control circuit is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through a series connection of a thirteenth resistor and a fourteenth resistor, the power supply terminal of the second main control circuit is electrically connected to the positive electrode of the second diode, and the negative electrode of the second diode is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through a fifteenth capacitor;

[0022] The gate of the second MOS transistor is electrically connected to the voltage signal feedback terminal of the second main control circuit, the connection terminal of the thirteenth resistor and the fourteenth resistor is electrically connected to the voltage signal feedback terminal of the second main control circuit, and the sixteenth capacitor is connected in parallel between the voltage signal feedback terminal of the second main control circuit and the power supply terminal of the second main control circuit;

[0023] The negative pole of the output terminal of the AC-DC power supply circuit is electrically connected to the positive pole of the output terminal of the AC-DC power supply circuit through a first electrolytic capacitor. The negative pole of the output terminal of the AC-DC power supply circuit is electrically connected to the positive pole of a first diode. The negative pole of the first diode is electrically connected to the source electrode of a second MOS transistor. The negative pole of the output terminal of the AC-DC power supply circuit is electrically connected to the power supply terminal of a second main control circuit through a second electrolytic capacitor.

[0024] Compared with the prior art, the second main control circuit adjusts the on-off of the second MOS transistor through a PWM signal to adjust the power input to the second fast charging channel.

[0025] In a possible implementation manner, the first fast charging interface is a Type-C interface.

[0026] In a possible implementation manner, the second fast charging interface includes a Type-C interface and a USB interface.

[0027] In a possible implementation manner, the output terminal voltage of the AC-DC power supply circuit is a DC voltage of 5 to 22V. Description of the Drawings

[0028] Figure 1 It is a system block diagram of a multi-output interface PD fast charging control circuit of the present utility model;

[0029] Figure 2 It is a circuit diagram of the AC-DC power supply circuit in a multi-output interface PD fast charging control circuit of the present utility model;

[0030] Figure 3 It is a circuit diagram of the first main control circuit and the second main control circuit in a multi-output interface PD fast charging control circuit of the present utility model. Detailed Embodiments

[0031] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0032] The following further elaborates the present application in detail with reference to the drawings and specific embodiments.

[0033] Refer to Figures 1 to 3 As shown, the embodiments of the present application disclose a multi-output interface PD fast charging control circuit, including:

[0034] An AC-DC power supply circuit;

[0035] The first main control circuit, the output end of the AC-DC power supply circuit is electrically connected to the power supply end of the first main control circuit. The first main control circuit is communicatively connected to a first fast charging interface for electrically connecting to a load. The first main control circuit is electrically connected to the control end of a switching tube. One end of the switching tube is electrically connected to the output end of the AC-DC power supply circuit, and the other end of the switching tube is electrically connected to the power supply end of the first fast charging interface. The first main control circuit controls the output of a PWM signal to the control end of the switching tube according to the load power supply demand with a protocol fed back by the first fast charging interface.

[0036] The second main control circuit, the output end of the AC-DC power supply circuit is electrically connected to the power supply end of the second main control circuit through a buck power supply circuit. The second main control circuit is communicatively connected to a plurality of second fast charging interfaces for electrically connecting to a load, and the second main control circuit is communicatively connected to the first main control circuit.

[0037] The on-off of the switching tube is controlled by the PWM signal of the first main control circuit to control the power output to the first fast charging interface, eliminating the DC-DC module, reducing the peripheral components, reducing the useless loss of the whole machine, and improving the output efficiency of the whole machine. The second main control circuit and the first main control circuit are communicatively connected to facilitate the adjustment of the total output power.

[0038] In this embodiment, a multi-output interface PD fast charging control circuit further includes a signal loop for feeding back whether the load electrically connected to the first fast charging interface is working normally, and the first main control circuit is electrically connected to the input end of the signal loop.

[0039] The AC-DC power supply circuit includes a power supply circuit, a power control circuit, and a transformer L3. The input end of the power supply circuit is electrically connected to the live wire and the neutral wire. The output end of the power supply circuit is electrically connected to the primary side of the transformer L3. The secondary side of the transformer L3 is respectively electrically connected to the power supply end of the first main control circuit, the power supply end of the first fast charging interface, and the input end of the buck power supply circuit. The input end of the power control circuit is electrically connected to the power supply circuit, the output end of the power control circuit is electrically connected to the primary side of the transformer L3, and the output end of the signal loop is electrically connected to the power control circuit.

[0040] The signal loop can timely feedback whether the load connected to the first fast charging interface is working normally, avoiding damage to the power supply and the load caused by abnormal power supply.

[0041] See Figure 2 As shown, the AC-DC power supply circuit includes a power supply circuit, a power control circuit, and a transformer L3, all of which are prior arts and will not be described in detail again.

[0042] The AC-DC power supply circuit supplies power to the first main control circuit and the second main control circuit respectively, enabling the first main control circuit and the second main control circuit to output a DC power supply of 5-22V. Specifically, the output voltage of the AC-DC power supply circuit is a DC voltage of 5-22V.

[0043] In this embodiment, the signal loop includes the sixteenth resistor ( Figure 2 R16 in Figure 2 ), the seventeenth resistor ( Figure 2 R17 in

[0044] ), the eighth capacitor (

[0045] C8 in

[0046] Figure 2 ), and the optocoupler U4. Figure 3 The secondary side of the transformer L3 is connected in series with the seventeenth resistor and the sixteenth resistor and then electrically connected to the negative electrode of the optocoupler U4. The eighth capacitor is connected in parallel across the two ends of the resistor R7. The connection end of the seventeenth resistor and the sixteenth resistor is electrically connected to the positive electrode of the optocoupler U4. The negative electrode of the optocoupler U4 is electrically connected to the first main control circuit. The emitter of the optocoupler U4 is grounded. The collector of the optocoupler U4 is electrically connected to the voltage feedback terminal of the power control circuit. The voltage feedback terminal of the power control circuit is grounded through the sixth capacitor.

[0047] Figure 3 Figure 3 Figure 3 Figure 3 ), and the source electrode of the first MOS transistor is electrically connected to the positive electrode of the first fast charging interface. The negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the negative electrode of the first fast charging interface through the second resistor (

[0048] R2 in Figure 3 ). Using a MOS transistor as the switching transistor has low cost and high speed.

[0049] By collecting the voltage across the second resistor and combining it with the current of the second resistor itself, it is easy to obtain the actual power output to the first fast charging interface.

[0050] In this embodiment, the step-down power supply circuit includes a twelfth resistor ( Figure 3 R12 in), the thirteenth resistor ( Figure 3 R13 in), the fourteenth resistor ( Figure 3 R14 in), the eighth capacitor ( Figure 3 C8 in), the fourteenth capacitor ( Figure 3 C14 in), the fifteenth capacitor ( Figure 3 C15 in), the sixteenth capacitor ( Figure 3 C16 in), the first electrolytic capacitor ( Figure 3 EC1 in), the second electrolytic capacitor ( Figure 3 EC2 in), the second MOS tube ( Figure 3 Q2 in), the first diode ( Figure 3 D1 in), the second diode ( Figure 3 D2 in), the first inductor ( Figure 3 in L1).

[0051] The positive electrode of the output end of the AC-DC power supply circuit is electrically connected to the drain of the second MOS tube, the source of the second MOS tube is electrically connected to the power supply end of the second main control circuit through the first inductor, and the drain of the second MOS tube is electrically connected to the source of the second MOS tube through the twelfth resistor and the fourteenth capacitor connected in series; the power supply end of the second main control circuit is electrically connected to the negative electrode of the output end of the AC-DC power supply circuit through the eighth capacitor, the power supply end of the second main control circuit is electrically connected to the negative electrode of the output end of the AC-DC power supply circuit through the thirteenth resistor and the fourteenth resistor connected in series, the power supply end of the second main control circuit is electrically connected to the positive electrode of the second diode, and the negative electrode of the second diode is electrically connected to the negative electrode of the output end of the AC-DC power supply circuit through the fifteenth capacitor.

[0052] The gate of the second MOS tube is electrically connected to the voltage signal feedback end of the second main control circuit, the connection end of the thirteenth resistor and the fourteenth resistor is electrically connected to the voltage signal feedback end of the second main control circuit, and the sixteenth capacitor is connected in parallel between the voltage signal feedback end of the second main control circuit and the power supply end of the second main control circuit.

[0053] The negative electrode of the output end of the AC-DC power supply circuit is electrically connected to the positive electrode of the output end of the AC-DC power supply circuit through the first electrolytic capacitor, the negative electrode of the output end of the AC-DC power supply circuit is electrically connected to the positive electrode of the first diode, the negative electrode of the first diode is electrically connected to the source electrode of the second MOS tube, and the negative electrode of the output end of the AC-DC power supply circuit is electrically connected to the power supply end of the second main control circuit through the second electrolytic capacitor.

[0054] The second main control circuit adjusts the on / off state of the second MOS transistor through a PWM signal to regulate the power input to the second fast charging channel.

[0055] In this embodiment, the first fast charging interface is a Type-C interface. The second fast charging interface includes a Type-C interface and a USB interface.

[0056] In this embodiment, both the first main control circuit and the second main control circuit are chips capable of recognizing fast charging protocols and processing signals. This is prior art and will not be elaborated further here.

[0057] 1. Single-port output:

[0058] When the first fast charging interface is separately connected to a load device with a fast charging protocol (such as PD, QC3.0, QC2.0, etc.), the load device feeds back its actual different DC power requirements to the first main control circuit through the protocol. The first main control circuit controls the PWM signal of the first MOS transistor to control the AC-DC power supply circuit to output and release the corresponding power to the load device.

[0059] Meanwhile, whether the load device is operating normally can be confirmed by feedback through the signal loop to the main control power supply: If the load device is operating normally, the signal loop outputs a low level, and the first main control circuit controls the first MOS transistor to continuously conduct and output power; otherwise, the first MOS transistor is turned off.

[0060] Similarly, when multiple second fast charging interfaces are separately connected to load devices with fast charging protocols, it is similar to when the first fast charging interface is separately connected.

[0061] 2. Multi-port output:

[0062] ① When the charging channels of the first main control circuit and the second main control circuit are simultaneously connected to load devices with fast charging protocols (such as PD, QC3.0, QC2.0, etc.), the first main control circuit and the second main control circuit communicate with each other to control the preset maximum output power, avoid overcurrent of the preset total output power current, and achieve current distribution for the first main control circuit and the second main control circuit. Each channel outputs different powers according to different currents.

[0063] The buck power supply circuit of the second main control circuit provides two chips to achieve different load voltages, reducing the high voltage of the bus and outputting it to all second fast charging interfaces of the second main control circuit.

[0064] When any group of the load of the main control circuit is disconnected, the chips in the main control circuit do not perform current distribution, and the chips in the other group of the main control circuit make a separate chip access recognition and output the maximum fast charging power.

[0065] ②If a part of the load is first inserted into the fast charging interface connected to a set of main control circuits, and another part of the load is then inserted into the fast charging interface connected to another set of main control circuits, through interconnection communication, current distribution is performed on the two main control circuits to output different fast charging powers.

[0066] ③If a 5V power supply load is inserted into the fast charging interface connected to one set of main control circuits, and any other device load is then inserted into the fast charging interface connected to another set of main control circuits, through the interconnection communication of the two main control circuits, current distribution is performed on the two main control circuits to output electrical energy with a 5V voltage and different currents.

[0067] In the description of the present application, the description with reference to terms such as "an embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-output interface PD fast charging control circuit, characterized in that, Comprising: AC-DC power supply circuit; A first main control circuit, the output terminal of the AC-DC power supply circuit is electrically connected to the power supply terminal of the first main control circuit, the first main control circuit is communicatively connected to a first fast charging interface for electrically connecting to a load, the first main control circuit is electrically connected to the control terminal of a switching tube, one end of the switching tube is electrically connected to the output terminal of the AC-DC power supply circuit, and the other end of the switching tube is electrically connected to the power supply terminal of the first fast charging interface; the first main control circuit controls the output of a PWM signal to the control terminal of the switching tube according to the load power supply requirement with a protocol fed back by the first fast charging interface; A second main control circuit, the output terminal of the AC-DC power supply circuit is electrically connected to the power supply terminal of the second main control circuit through a step-down power supply circuit, the second main control circuit is communicatively connected to a plurality of second fast charging interfaces for electrically connecting to a load, and the second main control circuit is communicatively connected to the first main control circuit.

2. The multi-output interface PD fast charging control circuit according to claim 1, wherein It further includes a signal loop for feeding back whether the load electrically connected to the first fast charging interface is operating normally, and the first main control circuit is electrically connected to the input terminal of the signal loop; The AC-DC power supply circuit includes a power supply circuit, a power control circuit and a transformer L3, the input terminal of the power supply circuit is electrically connected to the live wire and the neutral wire, the output terminal of the power supply circuit is electrically connected to the primary side of the transformer L3, and the secondary side of the transformer L3 is respectively electrically connected to the power supply terminal of the first main control circuit, the power supply terminal of the first fast charging interface, and the input terminal of the step-down power supply circuit; the input terminal of the power control circuit is electrically connected to the power supply circuit, the output terminal of the power control circuit is electrically connected to the primary side of the transformer L3, and the output terminal of the signal loop is electrically connected to the power control circuit.

3. The multi-output interface PD fast charging control circuit according to claim 2, characterized in that, The signal loop includes a sixteenth resistor, a seventeenth resistor, an eighth capacitor and an optocoupler U4; The secondary side of the transformer L3 is connected in series with the seventeenth resistor and the sixteenth resistor and then electrically connected to the negative electrode of the optocoupler U4, the eighth capacitor is connected in parallel across the two ends of the resistor R7, the connection end of the seventeenth resistor and the sixteenth resistor is electrically connected to the positive electrode of the optocoupler U4, the negative electrode of the optocoupler U4 is electrically connected to the first main control circuit, the emitter of the optocoupler U4 is grounded, the collector of the optocoupler U4 is electrically connected to the voltage feedback terminal of the power control circuit, and the voltage feedback terminal of the power control circuit is grounded through a sixth capacitor.

4. The multi-output interface PD fast charging control circuit according to claim 1, wherein The switching tube is a first MOS tube, the first main control circuit is electrically connected to the gate of the first MOS tube, and the positive electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the drain of the first MOS tube; The source of the first MOS tube is electrically connected to the positive electrode of the first fast charging interface, and the negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the negative electrode of the first fast charging interface through a second resistor.

5. The multi-output interface PD fast charging control circuit according to claim 4, wherein, A sixth capacitor is connected in parallel across the two ends of the second resistor, and two IO ports of the first main control circuit are respectively electrically connected to the two ends of the second resistor for collecting the voltage across the second resistor.

6. The multi-output interface PD fast charging control circuit according to claim 1, wherein, The step-down power supply circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a second MOS transistor, a first diode, a second diode, and a first inductor; The positive electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the drain of the second MOS transistor. The source of the second MOS transistor is electrically connected to the power supply terminal of the second main control circuit through a first inductor. The drain of the second MOS transistor is electrically connected to the source of the second MOS transistor through a series connection of a twelfth resistor and a fourteenth capacitor. The power supply terminal of the second main control circuit is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through an eighth capacitor. The power supply terminal of the second main control circuit is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through a series connection of a thirteenth resistor and a fourteenth resistor. The power supply terminal of the second main control circuit is electrically connected to the positive electrode of the second diode. The negative electrode of the second diode is electrically connected to the negative electrode of the output terminal of the AC-DC power supply circuit through a fifteenth capacitor; The gate of the second MOS transistor is electrically connected to the voltage signal feedback terminal of the second main control circuit. The connection terminal of the thirteenth resistor and the fourteenth resistor is electrically connected to the voltage signal feedback terminal of the second main control circuit. The sixteenth capacitor is connected in parallel between the voltage signal feedback terminal of the second main control circuit and the power supply terminal of the second main control circuit; The negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the positive electrode of the output terminal of the AC-DC power supply circuit through a first electrolytic capacitor. The negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the positive electrode of the first diode. The negative electrode of the first diode is electrically connected to the source of the second MOS transistor. The negative electrode of the output terminal of the AC-DC power supply circuit is electrically connected to the power supply terminal of the second main control circuit through a second electrolytic capacitor.

7. The multi-output interface PD fast charging control circuit according to claim 1, characterized in that, The first fast charging interface is a Type-C interface.

8. The multi-output interface PD fast charging control circuit according to claim 1, wherein The second fast charging interface includes a Type-C interface and a USB interface.

9. The multi-output interface PD fast charging control circuit according to claim 1, characterized in that, The output terminal voltage of the AC-DC power supply circuit is a DC voltage of 5 to 22V.

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