Multifunctional power supply circuit and mobile power supply

Abstract

The utility model provides a multifunctional power supply circuit and a mobile power supply. The multifunctional power supply circuit comprises a microcontroller module, a DC output module, a USB output module, a PD output module, a circuit protection module and a power supply module. The power supply module provides electric energy for the microcontroller module and the circuit protection module, and the circuit protection module prevents the battery from being damaged by circuit faults. The circuit integrates various output modes of DC, USB and PD, the microcontroller module controls the enable end of each output module to control output electric energy, and diversified charging requirements of users are met at the same time. Besides, a private protocol is supported through the Type-C interface, a customized power supply scheme can be provided for special loads such as heating clothes, and a user is allowed to upgrade software of a power supply through the Type-C interface. And when the circuit is not used for a long time or the electric quantity of the battery is relatively low, the main control chip controls the circuit to enter a low-power-consumption sleep mode, so that the use efficiency of electric energy is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of mobile power supplies, and in particular to a multifunctional power supply circuit and a mobile power supply. BACKGROUND

[0002] With the increasing popularity of smart devices, wearable technology, and outdoor activities, user demand for mobile power supplies is gradually increasing. At the same time, in cold environments, mobile power supplies are used to heat clothing as a new type of warming tool, and the market demand is rapidly growing. However, although there are many types of mobile power supplies on the market, most of them only provide basic charging functions and lack direct support for specific devices such as heated clothing, especially for new heated clothing that uses a proprietary protocol, it is difficult to provide stable power supply.

[0003] In addition, most mobile power supplies only provide limited charging interfaces and output power, making it difficult to meet user demand for simultaneous charging of multiple devices or customized power supply for specific devices. Mobile power supplies lack flexible software update mechanisms in terms of software upgrades, making it difficult for users to update the firmware of the mobile power supply in a timely manner, and most mobile power supplies do not have software upgrade functions. Once the mobile power supply is shipped, its functions and performance are fixed and cannot be updated to adapt to technological development and changes in user demand, making it difficult for mobile power supplies to implement software upgrade iterations. UTILITY MODEL CONTENT

[0004] The purpose of the present disclosure is to overcome the shortcomings in the prior art and provide a multifunctional power supply circuit and a mobile power supply that integrates DC, USB, and PD output methods.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A multifunctional power supply circuit includes a microcontroller module, a DC output module, a USB output module, a PD output module, a circuit protection module, and a power supply module.

[0007] The power supply module is used to provide power to the microcontroller module, the DC output module, the USB output module, the PD output module, and the circuit protection module.

[0008] The circuit protection module is used to protect the components of each module in the event of a fault.

[0009] The DC module enable control end of the microcontroller module is connected with the DC signal control end of the DC output module, the USB module enable control end of the microcontroller module is connected with the USB signal control end of the USB output module, the PD module enable control end of the microcontroller is connected with the PD signal control end of the PD output module, and the output end of the DC output module, the output end of the USB output module and the output end of the PD output module are used for providing electric energy for a load.

[0010] The microcontroller module comprises a master control chip, a first electronic switch tube, a second electronic switch tube, a first voltage dividing resistor and a second voltage dividing resistor, the first end of the first electronic switch tube and the first end of the first voltage dividing resistor are used for being connected with a battery pack power supply end, the second end of the first electronic switch tube is connected with the power input end of the master control chip, the second end of the first voltage dividing resistor is connected with the control end of the first electronic switch tube, the control end of the first electronic switch tube is connected with the first end of the second electronic switch tube, the first end of the second voltage dividing resistor is connected with the power sleep signal end of the master control chip, the second end of the second voltage dividing resistor is connected with the control end of the second electronic switch tube, and the second end of the second electronic switch tube is grounded.

[0011] In one of the embodiments, the microcontroller module further comprises a first current limiting resistor and a second current limiting resistor, the first end of the first current limiting resistor is connected with the second end of the first electronic switch tube, the second end of the first current limiting resistor is connected with the power input end of the master control chip, the first end of the second current limiting resistor is connected with the control end of the first electronic switch tube, and the second end of the second current limiting resistor is connected with the first end of the second electronic switch tube.

[0012] In one of the embodiments, the microcontroller module further comprises a first pull-down resistor, the first end of the first pull-down resistor is connected with the control end of the second electronic switch tube, and the second end of the first pull-down resistor is grounded.

[0013] In one of the embodiments, the USB output module comprises a USB output control chip, a third voltage dividing resistor and a fourth voltage dividing resistor, the first end of the third voltage dividing resistor is used for being connected with a battery pack power supply end, the second end of the third voltage dividing resistor is connected with the power input end of the USB output control chip, the first end of the fourth voltage dividing resistor is connected with the USB signal control end of the USB output module, and the second end of the fourth voltage dividing resistor is connected with the USB drive signal end of the USB output control chip.

[0014] In one of the embodiments, the USB output module further comprises a second pull-down resistor, a first end of the second pull-down resistor is connected with a USB drive signal end of the USB output control chip, and a second end of the second pull-down resistor is grounded.

[0015] In one of the embodiments, the DC output module comprises a voltage controller, a third electronic switch tube and a fifth voltage dividing resistor, a voltage input end of the voltage controller is used to be connected with a battery pack power supply end, an output end of the voltage controller is connected with a first end of the third electronic switch tube, a first end of the fifth voltage dividing resistor is connected with a DC signal control end of the DC output module, a second end of the fifth voltage dividing resistor is connected with a control end of the third electronic switch tube, and a second end of the third electronic switch tube is grounded.

[0016] In one of the embodiments, the DC output module further comprises a positive temperature coefficient thermistor, a first end of the positive temperature coefficient thermistor is connected with the output end of the voltage controller, and a second end of the positive temperature coefficient thermistor is connected with the first end of the third electronic switch tube.

[0017] In one of the embodiments, the PD output module comprises a PD output control chip, a fourth electronic switch tube and a sixth voltage dividing resistor, a first end of the fourth electronic switch tube is connected with a channel configuration end of the PD output control chip, a first end of the sixth voltage dividing resistor is connected with a control end of the fourth electronic switch tube, a second end of the sixth voltage dividing resistor is connected with a second end of the fourth electronic switch tube, the control end of the fourth electronic switch tube is connected with a PD module enable control end of a microcontroller, and the second end of the fourth electronic switch tube is grounded.

[0018] In one of the embodiments, the PD output module further comprises a filter capacitor, a first end of the filter capacitor is connected with the control end of the fourth electronic switch tube, and a second end of the filter capacitor is grounded.

[0019] A mobile power supply comprises the multifunctional power supply circuit according to any one of the above.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] 1. The aforementioned multi-functional power supply circuit integrates DC, USB, and PD output modes to meet diverse user charging needs. Furthermore, it supports proprietary protocols via a Type-C interface, enabling customized power supply solutions for special loads such as heated clothing. Additionally, the multi-functional power supply circuit allows users to upgrade software via the Type-C interface to enhance the power bank's performance and functionality. On the other hand, when the power bank is not used for an extended period or the battery level is low, the main control chip will control the multi-functional power supply circuit to enter a low-power sleep mode, cutting off the power supply and thus improving the power efficiency of the multi-functional power supply circuit. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a system block diagram of a multifunctional power supply circuit according to one embodiment;

[0024] Figure 2 A circuit diagram of a microcontroller module for a multifunctional power supply circuit according to one embodiment;

[0025] Figure 3 A circuit diagram of the DC output module of a multifunctional power supply circuit according to one embodiment;

[0026] Figure 4 A circuit diagram of a USB output module of a multi-functional power supply circuit according to one embodiment;

[0027] Figure 5 for Figure 4 The diagram shows a partial circuit diagram of the USB output module.

[0028] Figure 6 This is a circuit diagram of the PD output module of a multi-functional power supply circuit according to one embodiment;

[0029] Figure 7 for Figure 6 The diagram shown is a partial circuit diagram of the PD output module.

[0030] Figure 8 A circuit diagram of the circuit protection module of a multifunctional power supply circuit according to one embodiment;

[0031] Figure 9 This is a circuit diagram of a power supply module for a multifunctional power supply circuit according to one embodiment. Detailed Implementation

[0032] For the purposes of this disclosure, a more complete understanding can be obtained by reference to the following description taken in connection with the accompanying drawings described below. The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0033] It is noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for illustration only and do not in any way limit the position of the embodiments.

[0034] 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 disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] For better understanding of the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below in connection with specific embodiments:

[0036] As shown in FIG. 1, a multifunctional power supply circuit 10 according to an embodiment of the present disclosure includes a microcontroller module 100, a DC output module 200, a USB output module 300, a PD output module 400, a circuit protection module 500, and a power supply module 600. Figures 1 to 9

[0037] The power supply module 600 is configured to supply power to the microcontroller module 100, the DC output module 200, the USB output module 300, the PD output module 400, and the circuit protection module 500.

[0038] The circuit protection module 500 is configured to protect the components of each module in the event of a fault.

[0039] ​The DC module enable control end DC-EN of the microcontroller module is connected with the DC signal control end DC-EN1 of the DC output module, the USB module enable control end USB-EN of the microcontroller module is connected with the USB signal control end USB-EN1 of the USB output module, the PD module enable control end PD-EN of the microcontroller is connected with the PD signal control end PD-EN1 of the PD output module, and the output end of the DC output module, the output end of the USB output module and the output end of the PD output module are respectively used for providing electric energy for the load.

[0040] The microcontroller module 100 comprises a master control chip U1, a first electronic switch tube MC2, a second electronic switch tube MC5, a first voltage dividing resistor R1 and a second voltage dividing resistor RC8, the first end of the first electronic switch tube MC2 and the first end of the first voltage dividing resistor R1 are respectively used for being connected with the battery pack power supply end, the second end of the first electronic switch tube MC2 is connected with the power input end of the master control chip U1, the second end of the first voltage dividing resistor R1 is connected with the control end of the first electronic switch tube MC2, the control end of the first electronic switch tube MC2 is connected with the first end of the second electronic switch tube MC5, the first end of the second voltage dividing resistor RC8 is connected with the power sleep signal end SELF_POWERDOWN of the master control chip, the second end of the second voltage dividing resistor RC8 is connected with the control end of the second electronic switch tube MC5, and the second end of the second electronic switch tube MC5 is grounded.

[0041] In the present embodiment, when the user connects a heated clothing or other powered device to the power bank, the powered device sends a power supply demand signal to the multifunctional power supply circuit 10, so that the master control chip U1 receives the power supply demand signal from the connected device and analyzes the received signal to identify the type of the device and the required voltage and current and other key information. Then, according to the identified device type and power supply demand, the master control chip U1 will select the corresponding PD output module 400, USB output module 300 or DC output module 200 for power supply. Specifically, when the powered device is a heated clothing, due to the support of Type-C port private protocol, the master control chip U1 outputs a high-level signal to the DC signal control end DC-EN1 of the DC output module 200 through the DC output module 200 enable end DC-EN, so that the DC output module 200 provides a 6V-8.4V direct current voltage to the powered device; when the powered device is a mobile device such as a mobile phone or a tablet computer, the master control chip U1 outputs a high-level signal to the USB signal control end USB-EN1 of the USB output module 300 through the USB output module 300 enable end USB-EN, so that the USB output module 300 provides a 5V 2.4A direct current voltage to the powered device. When the powered device is a high-power device such as a notebook computer, the master control chip U1 outputs a high-level signal to the PD signal control end PD-EN1 of the PD output module 400 through the PD output module 400 enable end PD-EN, so that the PD output module 400 provides a maximum power of 45W fast charging direct current voltage to the powered device, so that the master control chip U1 can adjust the voltage and current of the output module according to the actual demand of the device, thereby ensuring that the powered device can be normally charged.

[0042] Further, the user can connect the power bank to the computer through the Type-C interface, and then upgrade the software of the power bank, so that the software system of the power bank is optimized to improve the performance and user experience of the power bank. When the master control chip U1 detects an abnormal condition, since the circuit protection module 500 has multiple protection functions such as overcharge, overdischarge, overtemperature and short circuit protection, it will immediately cut off the power supply and reduce the output power, thereby preventing the multifunctional power supply circuit 10 from being damaged.

[0043] Further, when the power bank is not used for a long time or the battery power is low, the main control chip U1 outputs a high level signal to the control end of the second electronic switch tube MC5 through the power sleep signal end SELF_POWERDOWN, so that the voltage of the control end of the second electronic switch tube MC5 is greater than its conduction threshold voltage, so that the second electronic switch tube MC5 is turned on. Since the first end of the second electronic switch tube MC5 is connected with the control end of the first electronic switch tube MC2, the control end of the first electronic switch tube MC2 forms a loop with the ground end through the second electronic switch tube MC5, so that the first electronic switch tube MC2 is cut off, thereby reducing the voltage of the power input end of the main control chip U1 and entering a low-power sleep state. At this time, the multifunctional power supply circuit 10 will cut off the power supply to reduce the storage power consumption of the battery and prolong the use time of the battery, thereby saving the power consumption of the multifunctional power supply circuit 10.

[0044] The multifunctional power supply circuit 10 described above integrates DC, USB and PD multiple output modes to meet the diversified charging needs of users, and supports private protocols through the Type-C interface, so that the multifunctional power supply circuit 10 can provide customized power supply solutions for special loads such as heated clothes. In addition, the multifunctional power supply circuit 10 allows users to upgrade software through the Type-C interface to improve the performance and functions of the power bank. On the other hand, when the power bank is not used for a long time or the battery power is low, the main control chip U1 will control the multifunctional power supply circuit 10 to enter a low-power sleep mode, so that the multifunctional power supply circuit 10 will cut off the power supply, thereby improving the power use efficiency of the multifunctional power supply circuit 10.

[0045] As Figure 2As shown, in one embodiment, the microcontroller module 100 further includes a first current-limiting resistor RM12 and a second current-limiting resistor RA1. The first end of the first current-limiting resistor RM12 is connected to the second end of the first electronic switch MC2, and the second end of the first current-limiting resistor RM12 is connected to the power input terminal of the main control chip U1. The first end of the second current-limiting resistor RA1 is connected to the control terminal of the first electronic switch MC2, and the second end of the second current-limiting resistor RA1 is connected to the first end of the second electronic switch MC5. In this embodiment, when the battery pack power supply provides power to the main control chip U1 through the first electronic switch MC2, the first current-limiting resistor RM12, connected in series between the second end of the first electronic switch MC2 and the power input terminal of the main control chip U1, limits the current flowing into the main control chip U1, preventing excessive current from impacting the main control chip U1. Simultaneously, the first current-limiting resistor RM12 also acts as a voltage divider, ensuring that the voltage received by the main control chip U1 is within its operating voltage range, thus guaranteeing the normal operation of the main control chip U1. When the microcontroller needs to enter a low-power sleep state, the main control chip U1 outputs a high-level signal through the power sleep signal terminal SELF_POWERDOWN. Since the second current-limiting resistor RA1 is connected in series between the power sleep signal terminal SELF_POWERDOWN of the main control chip U1 and the control terminal of the second electronic switch MC5, the second current-limiting resistor RA1 can adjust the control voltage of the second electronic switch MC5, thereby making the voltage change of the control terminal of the second electronic switch MC5 more gradual.

[0046] like Figure 2 As shown, in one embodiment, the microcontroller module further includes a first pull-down resistor RC17. The first end of the first pull-down resistor RC17 is connected to the control terminal of the second electronic switch transistor, and the second end of the first pull-down resistor RC17 is grounded. In this embodiment, when the main control chip U1 does not output a high-level signal through the power sleep signal terminal SELF_POWERDOWN, the control terminal of the second electronic switch transistor MC5 is in a floating state. At this time, the first pull-down resistor RC17 pulls the control terminal of the second electronic switch transistor MC5 to a low level, thereby ensuring that MC5 is in a reliable cutoff state, avoiding false triggering or instability caused by the floating control terminal, and thus enhancing the circuit's anti-interference capability. On the other hand, various electromagnetic interferences or transient voltage changes may be encountered during circuit operation. Since one end of the first pull-down resistor RC17 is grounded, the first pull-down resistor RC17 can effectively suppress the influence of external interference on the control terminal of the second electronic switch transistor MC5, preventing malfunctions caused by interference signals, thereby improving the stability and reliability of the microcontroller module.

[0047] like Figure 4 and Figure 5As shown in the figure, in one embodiment, the USB output module 300 comprises a USB output control chip UA1, a third voltage dividing resistor FA1 and a fourth voltage dividing resistor RA8. The first end of the third voltage dividing resistor FA1 is connected with the battery pack power supply end, the second end of the third voltage dividing resistor FA1 is connected with the power input end of the USB output control chip UA1, the first end of the fourth voltage dividing resistor RA8 is connected with the USB signal control end USB-EN1 of the USB output module, and the second end of the fourth voltage dividing resistor RA8 is connected with the USB drive signal end EN of the USB output control chip UA1. In this embodiment, when the battery pack provides power, the third voltage dividing resistor FA1 and the circuit inside the USB output control chip UA1 share the voltage, so as to ensure that the power supply voltage received by the USB output control chip UA1 is within its safe and effective working range, thereby protecting the USB output control chip UA1 from damage caused by excessive voltage. The fourth voltage dividing resistor RA8 is connected between the USB signal control end USB-EN1 of the USB output module and the USB drive signal end EN of the USB output control chip UA1. When the host chip U1 outputs a corresponding control signal to the USB signal control end USB-EN1 of the USB output module through the USB enable control end USB-EN according to the power supply requirement of the connected device, the fourth voltage dividing resistor RA8 will perform level conversion on this control signal, so that the voltage thereof is suitable for the drive signal voltage recognized by the USB output control chip UA1, thereby enabling the USB output control chip UA1 to turn on or off the USB output according to the drive signal, and further realizing power supply control over the connected device.

[0048] As shown in the figure, Figure 4 and Figure 5 As shown in the figure, in one embodiment, the USB output module further comprises a second pull-down resistor RA13, the first end of the second pull-down resistor RA13 is connected with the USB drive signal end of the USB output control chip, and the second end of the second pull-down resistor RA13 is grounded. In this embodiment, when the host chip U1 does not output a high-level signal to the USB signal control end USB-EN1 of the USB output module 300 through the USB enable control end USB-EN, the USB drive signal end EN of the USB output control chip UA1 will be in a floating state. At this time, the second pull-down resistor RA13 RB9 pulls the USB drive signal end EN to a low level, thereby ensuring that the USB drive signal end EN of the USB output control chip UA1 is in a reliable low-level state, avoiding the mis-triggering or unstable state caused by the floating control end, and further enhancing the anti-interference ability of the USB output module.

[0049] As shown in the figure, Figure 2 and Figure 3As shown in the drawings, in one embodiment, the DC output module 200 includes a voltage controller DC6, a third electronic switch tube MD6 and a fifth voltage dividing resistor RD13. The voltage input end of the voltage controller DC6 is connected with the battery pack power supply end. The output end of the voltage controller DC6 is connected with the first end of the third electronic switch tube MD6. The first end of the fifth voltage dividing resistor RD13 is connected with the DC signal control end DC-EN1 of the DC output module. The second end of the fifth voltage dividing resistor RD13 is connected with the control end of the third electronic switch tube MD6. The second end of the third electronic switch tube MD6 is grounded. In this embodiment, when the master control chip U1 outputs a high level control signal to the DC signal control end DC-EN1 of the DC output module through the DC enable control end DC-EN, the high level signal is divided by the fifth voltage dividing resistor RD13 and then transmitted to the control end of the third electronic switch tube MD6, so that the voltage of the control end of the third electronic switch tube MD6 is greater than its conduction threshold voltage, thereby making the third electronic switch tube MD6 conductive, and then allowing the current to flow out from the voltage controller DC6, pass through the third electronic switch tube MD6 and form a circuit loop, so as to realize precise control of the load power supply.

[0050] As shown in the drawings, Figure 2 and Figure 3 As shown in the drawings, in one embodiment, the DC output module 200 further includes a positive temperature coefficient thermistor PTC. The first end of the positive temperature coefficient thermistor PTC is connected with the output end of the voltage controller DC6. The second end of the positive temperature coefficient thermistor PTC is connected with the first end of the third electronic switch tube MD6. In this embodiment, the resistance value of the positive temperature coefficient thermistor PTC increases with the increase of temperature. At normal temperature, the resistance value of the positive temperature coefficient thermistor PTC is relatively low, so as to allow the current to pass through smoothly. When the current is too large or the ambient temperature rises, the temperature of the positive temperature coefficient thermistor PTC rises, and its resistance value will increase rapidly, thereby limiting the passing of the current, and playing a role of overcurrent and overheat protection. Specifically, when the master control chip U1 outputs a high level signal through the enable end DC-EN of the DC output module 200 to control the third electronic switch tube MD6 to be conductive, the current will flow through the positive temperature coefficient thermistor PTC. When the current in the circuit is too large or the temperature abnormally rises, the resistance value of the positive temperature coefficient thermistor PTC will increase rapidly, thereby limiting the continuous increase of the current, and further making the positive temperature coefficient thermistor PTC play a protection role in the DC output module 200.

[0051] As shown in the drawings, Figure 6 and Figure 7As shown, in one embodiment, the PD output module 400 includes a PD output control chip U2, a fourth electronic switch tube MC1, and a sixth voltage dividing resistor RC19. The first end of the fourth electronic switch tube MC1 is connected to the channel configuration end of the PD output control chip, the first end of the sixth voltage dividing resistor RC19 is connected to the control end of the fourth electronic switch tube MC1, the second end of the sixth voltage dividing resistor RC19 is connected to the second end of the fourth electronic switch tube MC1, the control end of the fourth electronic switch tube MC1 is connected to the PD module enable control end PD-EN of the microcontroller, and the second end of the fourth electronic switch tube MC1 is grounded. In this embodiment, when the PD module enable control end PD-EN of the microcontroller outputs a high-level signal to the control end of the fourth electronic switch tube MC1, the voltage at the control end of the fourth electronic switch tube MC1 will be greater than its conduction threshold voltage, so that the fourth electronic switch tube MC1 is turned on. At the same time, the channel configuration end of the PD output control chip U2 includes a first detection end CC1 and a second detection end CC2. When the device is connected to the power supply, the first detection end CC1 is connected to the communication end on the device, and the second detection end CC2 is disconnected from the communication end on the device. The PD output control chip U2 detects the voltage level at the first detection end CC1 to determine whether the device and the power supply are connected in the correct direction. Specifically, if the first detection end CC1 detects a voltage change and the voltage is within the expected range, it indicates that the plug direction is correct, so that the PD output control chip U2 can determine whether the device and the power supply are in the correct connection state through the voltage change of the first detection end CC1 and the second detection end CC2, thereby improving the accuracy and safety of the PD output module 400.

[0052] As shown in Figure 6 and Figure 7 As shown, in one embodiment, the PD output module further includes a filter capacitor CC33. The first end of the filter capacitor CC33 is connected to the control end of the fourth electronic switch tube, and the second end of the filter capacitor CC33 is grounded. In this embodiment, when the PD module enable control end PD-EN of the microcontroller outputs a high-level signal to the control end of the fourth electronic switch tube MC1, the filter capacitor CC33 has the characteristics of storing and releasing electrical energy, and has low impedance to high-frequency signals. Therefore, the filter capacitor CC33 can absorb the high-frequency noise components in the control signal and guide the high-frequency noise to the ground, thereby ensuring that the control end of the fourth electronic switch tube MC1 obtains a stable level signal.

[0053] A mobile power supply includes the multifunctional power supply circuit 10 of any of the above. In this embodiment, when a user connects a heated clothing or other powered device to the mobile power supply, the powered device sends a power supply demand signal to the multifunctional power supply circuit 10, so that the master control chip U1 receives the power supply demand signal from the connected device and analyzes the received signal to identify the type of device and the required voltage and current and other key information. Then, according to the identified device type and power supply demand, the master control chip U1 will select the corresponding PD output module 400, USB output module 300 or DC output module 200 for power supply. Specifically, when the powered device is a heated clothing, due to the support of the Type-C port private protocol, the master control chip U1 outputs a high-level signal to the DC signal control end DC-EN1 of the DC output module 200 through the DC output module 200 enable end DC-EN, so that the DC output module 200 provides a 6V-8.4V DC voltage to the powered device; when the powered device is a mobile device such as a mobile phone or tablet, the master control chip U1 outputs a high-level signal to the USB signal control end USB-EN1 of the USB output module 300 through the USB output module 300 enable end USB-EN, so that the USB output module 300 provides a 5V 2.4A DC voltage to the powered device. When the powered device is a high-power device such as a notebook computer, the master control chip U1 outputs a high-level signal to the PD signal control end PD-EN1 of the PD output module 400 through the PD output module 400 enable end PD-EN, so that the PD output module 400 provides a maximum power of 45W fast charging DC voltage to the powered device, so that the master control chip U1 can adjust the voltage and current of the output module according to the actual demand of the device, thereby ensuring that the powered device can be normally charged. Further, the user can connect the mobile power supply to the computer through the Type-C interface, and then upgrade the software of the mobile power supply, so that the software system of the mobile power supply is optimized to improve the performance and user experience of the mobile power supply. When the master control chip U1 detects an abnormal condition, since the circuit protection module 500 has multiple protection functions such as overcharge, overdischarge, overtemperature and short circuit, it will immediately cut off the power supply and reduce the output power, thereby preventing the multifunctional power supply circuit 10 from being damaged.Further, when the mobile power supply is not used for a long time or the battery power is low, the main control chip U1 outputs a high level signal to the control end of the second electronic switch tube MC5 through the power sleep signal end SELF_POWERDOWN, so that the control end voltage of the second electronic switch tube MC5 is greater than its conduction threshold voltage, so that the second electronic switch tube MC5 is turned on. Since the first end of the second electronic switch tube MC5 is connected with the control end of the first electronic switch tube MC2, the control end of the first electronic switch tube MC2 forms a loop with the ground through the second electronic switch tube MC5, so that the first electronic switch tube MC2 is cut off, thereby reducing the voltage of the power input end of the main control chip U1, and the main control chip U1 enters a low-power sleep state. At this time, the multifunctional power supply circuit 10 will cut off the power supply to reduce the storage power consumption of the battery and prolong the use time of the battery, thereby saving the power consumption of the multifunctional power supply circuit 10.

[0054] Compared with the prior art, the present disclosure has at least the following advantages:

[0055] 1. The multifunctional power supply circuit 10 described above integrates DC, USB and PD output modes to meet the diversified charging needs of users, and supports private protocols through the Type-C interface, so that the multifunctional power supply circuit 10 can provide customized power supply solutions for special loads such as heated clothes. In addition, the multifunctional power supply circuit 10 allows users to upgrade the software through the Type-C interface to improve the performance and functions of the mobile power supply. On the other hand, when the mobile power supply is not used for a long time or the battery power is low, the main control chip U1 will control the multifunctional power supply circuit 10 to enter a low-power sleep mode, so that the multifunctional power supply circuit 10 will cut off the power supply, thereby improving the power use efficiency of the multifunctional power supply circuit 10.

[0056] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, which are within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A multi-functional power supply circuit, characterized by comprising: The microcontroller module, the DC output module, the USB output module, the PD output module, the circuit protection module and the power supply module are connected in series, The power supply module is used for providing power for the microcontroller module, the DC output module, the USB output module, the PD output module and the circuit protection module; The circuit protection module is used for protecting the components of each module in case of failure; The DC module enable control end of the microcontroller module is connected with the DC signal control end of the DC output module, the USB module enable control end of the microcontroller module is connected with the USB signal control end of the USB output module, the PD module enable control end of the microcontroller module is connected with the PD signal control end of the PD output module, and the output end of the DC output module, the output end of the USB output module and the output end of the PD output module are respectively used for providing power for the load. The microcontroller module comprises a main control chip, a first electronic switch tube, a second electronic switch tube, a first voltage dividing resistor and a second voltage dividing resistor, the first end of the first electronic switch tube and the first end of the first voltage dividing resistor are respectively connected with the battery pack power supply end, the second end of the first electronic switch tube is connected with the power input end of the main control chip, the second end of the first voltage dividing resistor is connected with the control end of the first electronic switch tube, the control end of the first electronic switch tube is connected with the first end of the second electronic switch tube, the first end of the second voltage dividing resistor is connected with the power sleep signal end of the main control chip, and the second end of the second voltage dividing resistor is connected with the control end of the second electronic switch tube, and the second end of the second electronic switch tube is grounded.

2. The multi-functional power supply circuit according to claim 1, characterized by, The microcontroller module further comprises a first current limiting resistor and a second current limiting resistor, the first end of the first current limiting resistor is connected with the second end of the first electronic switch tube, the second end of the first current limiting resistor is connected with the power input end of the main control chip, the first end of the second current limiting resistor is connected with the control end of the first electronic switch tube, and the second end of the second current limiting resistor is connected with the first end of the second electronic switch tube.

3. The multi-functional power supply circuit according to claim 2, wherein The microcontroller module further comprises a first pull-down resistor, the first end of the first pull-down resistor is connected with the control end of the second electronic switch tube, and the second end of the first pull-down resistor is grounded.

4. The multi-functional power supply circuit according to claim 1, wherein The USB output module comprises a USB output control chip, a third voltage dividing resistor and a fourth voltage dividing resistor, the first end of the third voltage dividing resistor is connected with the battery pack power supply end, the second end of the third voltage dividing resistor is connected with the power input end of the USB output control chip, the first end of the fourth voltage dividing resistor is connected with the USB signal control end of the USB output module, and the second end of the fourth voltage dividing resistor is connected with the USB drive signal end of the USB output control chip.

5. The multi-functional power supply circuit according to claim 4, wherein The USB output module further comprises a second pull-down resistor, the first end of the second pull-down resistor is connected with the USB drive signal end of the USB output control chip, and the second end of the second pull-down resistor is grounded.

6. The multi-functional power supply circuit according to claim 1, wherein The DC output module comprises a voltage controller, a third electronic switch tube and a fifth voltage dividing resistor, a voltage input end of the voltage controller is used for being connected with a battery pack power supply end, an output end of the voltage controller is connected with a first end of the third electronic switch tube, a first end of the fifth voltage dividing resistor is connected with a DC signal control end of the DC output module, a second end of the fifth voltage dividing resistor is connected with a control end of the third electronic switch tube, and a second end of the third electronic switch tube is grounded.

7. The multi-functional power supply circuit according to claim 6, wherein The DC output module further comprises a positive temperature coefficient thermistor, a first end of the positive temperature coefficient thermistor is connected with the output end of the voltage controller, and a second end of the positive temperature coefficient thermistor is connected with the first end of the third electronic switch tube.

8. The multi-functional power supply circuit according to claim 1, wherein The PD output module comprises a PD output control chip, a fourth electronic switch tube and a sixth voltage dividing resistor, a first end of the fourth electronic switch tube is connected with a channel configuration end of the PD output control chip, a first end of the sixth voltage dividing resistor is connected with a control end of the fourth electronic switch tube, a second end of the sixth voltage dividing resistor is connected with a second end of the fourth electronic switch tube, the control end of the fourth electronic switch tube is connected with a PD module enable control end of a microcontroller module, and the second end of the fourth electronic switch tube is grounded.

9. The multi-functional power supply circuit according to claim 8, wherein The PD output module further comprises a filter capacitor, a first end of the filter capacitor is connected with the control end of the fourth electronic switch tube, and a second end of the filter capacitor is grounded.

10. A mobile power source, characterized by, The multifunctional power supply circuit comprises any one of claims 1 to 9. The multifunctional power supply circuit comprises any one of claims 1 to 9.

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