CN211790827U - Power supply circuit and power supply device - Google Patents
Power supply circuit and power supply device Download PDFInfo
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- CN211790827U CN211790827U CN202020234912.6U CN202020234912U CN211790827U CN 211790827 U CN211790827 U CN 211790827U CN 202020234912 U CN202020234912 U CN 202020234912U CN 211790827 U CN211790827 U CN 211790827U
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Abstract
The embodiment of the utility model provides a power supply circuit and power supply unit, wherein, power supply circuit includes master control circuit, energy storage component, first switch circuit, direct current-direct current converting circuit; the power supply circuit is provided with a power supply end and a power receiving end, the power supply end is used for being connected with the first interface, and the power receiving end is used for being connected with the second interface; the main control circuit is connected between the power supply end and the power receiving end; the first switch circuit is respectively connected with the main control circuit, the direct current-direct current conversion circuit and the power receiving end; the direct current-direct current conversion circuit is respectively connected with the main control circuit and the energy storage element. The embodiment of the utility model provides a can only adopt direct current-direct current converting circuit all the way to realize the function of charging and the function of discharging, because adopt direct current-direct current converting circuit all the way less, but also reduce components and parts for equipment volume can reduce, convenient production and use.
Description
Technical Field
The utility model relates to a charge control technical field, concretely relates to supply circuit and power supply unit.
Background
Many electronic devices in the market support quick charging at present, such as mobile phones, game machines and the like, the quick charging is significant in improving the service efficiency of fragmentization time of users, and the electronic devices can be charged more quickly when power needs to be used for the users, so that the most valuable time cost is saved. For this reason, some power supply devices such as mobile power supplies, back-clip products, etc. also start to support fast charging, which also becomes an important research direction of charging devices. However, the conventional power supply equipment at least adopts two paths of direct current-direct current conversion circuits when realizing quick charging, so that the power supply equipment has high production cost and large volume.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a supply circuit and chip can reduce equipment cost altogether, reduces the volume.
The embodiment of the utility model provides an adopt following technical scheme to realize:
a power supply circuit comprises a main control circuit, an energy storage element, a first switch circuit and a direct current-direct current conversion circuit; the power supply circuit is provided with a power supply end and a power receiving end, the power supply end is used for being connected with the first interface, and the power receiving end is used for being connected with the second interface; the main control circuit is connected between the power supply end and the power receiving end; the first switch circuit is respectively connected with the main control circuit, the direct current-direct current conversion circuit and the power receiving end; the direct current-direct current conversion circuit is respectively connected with the main control circuit and the energy storage element.
Optionally, the main control circuit includes a switch control circuit, and the first switch circuit is connected to a first switch control end of the switch control circuit.
Optionally, the main control circuit further includes a second switch circuit, the power supply end is connected to the power receiving end through the second switch circuit, and the second switch circuit is connected to a second switch control end of the switch control circuit.
Optionally, the first switch circuit and the second switch circuit are PMOS transistors or NMOS transistors, respectively.
Optionally, the main control circuit includes a charging protocol circuit and a switch control circuit, the charging protocol circuit is connected to the power supply terminal and the power receiving terminal, and the switch control circuit is connected to the first switch circuit.
Optionally, the power supply circuit further includes a charging protocol chip, and the charging protocol chip is connected to the main control circuit and connected between the power supply terminal and the power receiving terminal.
Optionally, the power supply circuit further includes a first charging protocol chip and a second charging protocol chip, the first charging protocol chip is connected between the power supply terminal and the main control circuit, and the second charging protocol chip is connected between the power receiving terminal and the main control circuit.
An embodiment of the utility model provides a still provides a power supply unit, including casing and as above power supply circuit, power supply circuit set up in the casing, the casing has first interface and second interface, power supply circuit's power supply end with first interface connection, the end of receiving electricity with second interface connection.
Optionally, the power supply device further includes a display unit, and the display unit is connected to the power supply circuit.
Optionally, the power supply device further includes a key unit, and the key unit is connected to the power supply circuit.
Compared with the prior art, the embodiment of the utility model provides a supply circuit and chip, supply circuit includes master control circuit, energy storage component, first switch circuit, direct current-direct current converting circuit, wherein, supply circuit has feed end and receiving end, the feed end is used for connecting first interface, the receiving end is used for connecting the second interface, master control circuit connects between feed end and receiving end, first switch circuit is connected with master control circuit, direct current-direct current converting circuit and receiving end respectively, direct current-direct current converting circuit is connected with master control circuit and energy storage component respectively. Therefore, the embodiment of the utility model provides a can only adopt direct current-direct current converting circuit of the same kind to realize the function of charging and the function of discharging, because adopt direct current-direct current converting circuit of the same kind less, reduce cost has but also reduced peripheral device for the equipment volume can reduce, thereby convenient debugging, production and use reduce maintenance cost and production manufacturing cost. For example, when the portable charger is applied to charging products such as charging back clamps, the requirement of small size of the back clamps on the market can be met, and convenience and portability are improved.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows a block diagram of a power supply circuit according to an embodiment of the present invention.
Fig. 2 shows a block diagram of a power supply circuit according to another embodiment of the present invention.
Fig. 3 shows a block diagram of a power supply circuit according to another embodiment of the present invention.
Fig. 4 shows a block diagram of a power supply circuit according to still another embodiment of the present invention.
Fig. 5 shows a block diagram of a power supply circuit according to still another embodiment of the present invention.
Fig. 6 shows a block diagram of a power supply circuit according to still another embodiment of the present invention.
Fig. 7 shows a schematic structural diagram of a power supply device provided by an embodiment of the present invention at a viewing angle.
Fig. 8 shows a schematic structural diagram of a power supply device provided by an embodiment of the present invention at yet another viewing angle.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
When the conventional power supply device realizes quick charging, two direct current-direct current conversion circuits (DC-DC conversion circuits) are generally adopted, wherein one direct current conversion circuit is responsible for charging and the other direct current conversion circuit is responsible for discharging. Specifically, there are currently two main approaches, among them:
the first scheme is that a Micro Control Unit (MCU) is used as a main Control and is mainly responsible for power display, key Control, and Control of a dc-dc conversion circuit. The circuit framework under the scheme has higher cost and more components, and causes certain difficulty in debugging. In addition, because the number of components is large and at least two paths of direct current-direct current conversion circuits are adopted, the size of the power supply equipment under the first scheme is large.
The second scheme is that the MCU is used as a main control and is mainly responsible for protocol control, electric quantity display, key control and control of a direct current-direct current conversion circuit. Compared with the first scheme, the scheme has the advantages that the MCU integrates the fast charging protocol, the cost is lower, and the number of peripheral devices is less. However, because two high-voltage fast-charging dc-dc conversion circuits still exist, and peripheral devices are still too many, heat generation in some devices with limited volume is serious, and the volume is also large.
Based on the above problems, the inventor has proposed the power supply circuit and the power supply device in the embodiment of the present invention through long-term research and repeated experiments.
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to perform clear and complete description on the technical scheme in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, fig. 1 schematically illustrates a power supply circuit 100 provided by an embodiment of the present invention, where the power supply circuit 100 includes a main control circuit 110, a first switching circuit 120, a dc-dc conversion circuit 130, and an energy storage element 140.
The power supply circuit 100 has a power supply terminal 101 and a power receiving terminal 102, where the power supply terminal 101 is used for connecting to the first interface, and the power receiving terminal 102 is used for connecting to the second interface. The first interface is an interface for matching a device capable of supplying power to the power supply circuit 100 with the power supply terminal 101, and the second interface is an interface for matching a device to be powered with the power supply circuit 100. In some examples, the first interface and the second interface may be USB (Universal Serial Bus) interfaces, such as USB _ a Type interface, USB _ B Type interface, USB Type-C interface, and the like, and may also be lighting interfaces, and the like, which is not limited herein.
In some embodiments, the power supply circuit 100 is used to supply power to a powered device. In one way, the power supply circuit 100 can take power from the outside through the power supply terminal 101, for example, the power supply terminal 101 can be connected to an adapter, and when the adapter is inserted into the power supply terminal 101, the power supply circuit 100 can take power from the adapter. The power receiving terminal 102 may be connected to an electric device, and the power supply circuit 100 may supply power to the electric device through the power receiving terminal 102, for example, the power supply circuit 100 is connected to a charging interface of the electric device through the power receiving terminal 102, and at this time, the second interface in this embodiment is connected to the charging interface of the electric device.
In the embodiment of the present invention, the electric device refers to an electronic device that can be charged through an adapter, including but not limited to various chargeable devices, especially mobile devices, such as a game machine, a mobile power supply, an MP3, an MP4, a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like.
The main control circuit 110 is connected between the power supply terminal 101 and the power receiving terminal 102, and the main control circuit 110 can be used for determining whether an adapter is connected. In some embodiments, the master control circuit 110 may include a microcontrolled unit (MicroControllerUnit).
The first switch circuit 120 is connected to the main control circuit 110, the dc-dc conversion circuit 130 and the power receiving terminal 102. The first switch circuit 120 may receive a control signal of the main control circuit 110 to switch a conducting state between the dc-dc converting circuit 130 and the power receiving terminal 102.
The dc-dc conversion circuit 130 is connected to the main control circuit 110 and the energy storage element 140, respectively. The dc-dc conversion circuit 130 can be used for boosting and reducing dc voltage, thereby controlling the energy storage element 140 to charge and discharge. The dc-dc conversion circuit 130 can receive a control signal of the main control circuit 110, take power from the energy storage element 140 to supply power to the electric device, so as to implement a discharging function, and also can take power from the adapter through the power supply terminal 101 to supply power to the energy storage element 140, so as to implement a charging function. In some embodiments, the dc-dc conversion circuit 130 may employ a dc-dc conversion chip, and is respectively connected to the main control circuit 110 and the energy storage element 140.
The working principle of this embodiment is specifically: when no adapter is connected, the main control circuit 110 controls the first switch circuit 120 to be turned on, so that the dc-dc conversion circuit 130 is turned on with the power receiving terminal 102, and controls the dc-dc conversion circuit 130 to take power from the energy storage element 140 and discharge power to the electric device connected with the power receiving terminal 102, thereby implementing the discharging function. When the adapter is connected, the power supply terminal 101 can be used for taking power through the DC-DC conversion circuit 130 to charge the energy storage element 140. Therefore, the embodiment can realize the charging and discharging functions by only adopting one path of the direct current-direct current conversion circuit 130, and can reduce the hardware cost due to the fact that one path of the direct current-direct current conversion circuit is less adopted, and peripheral devices are reduced, so that the size of the equipment can be reduced, debugging, production and use are facilitated, and the maintenance cost and the production and manufacturing cost are reduced. For example, when the portable charger is applied to charging products such as charging back clamps, the requirement of small size of the back clamps on the market can be met, and convenience and portability are improved.
In some alternative embodiments, an inductor L may be connected between the energy storage element 140 and the dc-dc conversion circuit 130, and may be used to filter out harmonics. In addition, in some embodiments, the power supply circuit 100 may further include a filter capacitor C, one end of the filter capacitor C is connected to the connection node between the dc-dc conversion circuit 130 and the first switch circuit 120, and the other end of the filter capacitor C is grounded. The filter capacitor is arranged, so that the working performance of the power supply circuit 100 is more stable, and meanwhile, the interference of noise signals or ripples on the power supply circuit 100 is also reduced.
In some embodiments, as shown in fig. 2, the main control circuit 110 may include a switch control circuit 112, and the first switch circuit 120 is connected to a first switch control terminal 1121 of the switch control circuit 112. The main control circuit 110 may further include a second switch circuit 113, the power supply terminal 101 is connected to the power receiving terminal 102 through the second switch circuit 113, and the second switch circuit 113 is connected to a second switch control terminal 1122 of the switch control circuit.
The switch control circuit 112 transmits a signal to the first switch circuit 120 through the first switch control terminal 1121, and is configured to control the first switch circuit 120 to be turned on or off, so as to switch the conduction state between the dc-dc conversion circuit 130 and the power receiving terminal 102. The switch control circuit 112 transmits a signal to the second switch circuit 113 through the second switch control terminal 1122 for controlling the on or off of the second switch circuit 113. In some embodiments, when the adapter is connected, the switch control circuit 112 may control the second switch circuit 113 to conduct between the power supply terminal 101 and the power receiving terminal 102, so that power can be taken from the adapter and directly discharged to the power receiving terminal 102 to charge the electric device connected to the power receiving terminal 102, thereby enabling the adapter to directly charge the electric device through the second switch circuit 113.
As a specific implementation manner, when the main control circuit 110 determines that no adapter is currently connected, the switch control circuit 112 controls the first switch circuit 120 to be turned on through the first switch control terminal 1121, so that the dc-dc conversion circuit 130 obtains power from the energy storage element 140, and outputs the power to the power receiving terminal 102 through the first switch circuit 120, so as to charge the electric device connected to the power receiving terminal 102. When the main control circuit 110 determines that an adapter is currently accessed, the second switch circuit 113 may be controlled to be turned on by the switch control circuit 112, so that the adapter may directly charge the electric device connected to the power receiving terminal 102 through the second switch circuit 113. In addition, in some embodiments, the remaining power supply capacity of the adapter may also be transmitted to the dc-dc conversion circuit 130 through the first switch circuit 120 to charge the energy storage element 140.
In some embodiments, the main control circuit 110 may include an MCU, and the switch control circuit 112 may be integrated with the MCU, or may be disposed outside the MCU and connected to the MCU, which is not limited herein, and those skilled in the art can select the MCU according to actual needs. As an embodiment, the switch control circuit 112 may be integrated in the MCU, so that the main control circuit 110 may be connected to the first switch circuit 120 and the second switch circuit 113 through the MCU, such that the MCU may control the first switch circuit 120 to be turned on or off through a pin connected to the first switch circuit 120, and control the second switch circuit 113 to be turned on or off through a pin connected to the second switch circuit 113.
In some embodiments, as shown in fig. 3, the master control circuit 110 may include a switch control circuit 112 and a charging protocol circuit 114, the master control circuit 110 may be connected to the power supply terminal 101 and the power receiving terminal 102 through the charging protocol circuit 114, and the switch control circuit 112 is connected to the first switch circuit 120.
It should be noted that the master control circuit 110 supports the charging protocol corresponding to the integrated charging protocol circuit 114, and to support different charging protocols, the master control circuit 110 may integrate different charging protocol circuits 114.
The Charging Protocol may include, but is not limited to, a QC (quick charge) 2.0 Protocol, a QC3.0 Protocol, an MTK Protocol of a communications department, a Fast Charging Protocol (FCP), a Super Charging Protocol (SCP), an AFC (adaptive Fast Charging) Protocol of samsung, a Power Delivery (PD) Protocol of a USB-IF (USB standardization organization), a PPS (Programmable Power Supply) Protocol, a VOOC Protocol, and the like.
In some embodiments, the charging protocol circuit 114 may include at least one of a PD protocol circuit, a QC2.0 protocol circuit, a QC3.0 protocol circuit, a FCP protocol circuit, a SCP protocol circuit, an AFC protocol circuit, a VOOC protocol circuit, a MTK protocol circuit, an AFC protocol circuit, and a PPS protocol circuit, without limitation. By integrating the charging protocol circuits 114 with different charging protocols, the main control circuit 110 can support communication with different charging protocols to determine whether the adapter connected to the power supply terminal 101 supports the corresponding charging protocol. For example, if the main control circuit 110 is integrated with a PD protocol circuit, the main control circuit 110 may determine whether the adapter accessing the power supply 101 supports the PD protocol.
In some embodiments, the main control circuit 110 may include an MCU, and the charging protocol circuit 114 may be integrated with the MCU, or may be disposed outside the MCU and connected to the MCU, which is not limited herein, and those skilled in the art can select the MCU according to actual needs. In one example, if the charging protocol circuit 114 is integrated in the MCU, the MCU may be a Smart PDMCU CSS32G020 in chip technology, which may support various commonly used fast charging protocols such as PD3.0, PPS, etc.
The working principle of this embodiment is specifically that, when no adapter is connected, the main control circuit 110 may send voltage shift information to the electrical device through the charging protocol circuit 114, and then obtain a voltage shift selected by the electrical device, according to the voltage shift, the main control circuit 110 may control the dc-dc conversion circuit 130 to output a voltage corresponding to the voltage shift, and control the first switch circuit 120 to be turned on through the switch control circuit 112, so that the dc-dc conversion circuit 130 quickly charges the electrical device through the first switch circuit 120, thereby realizing quick charging of the electrical device based on the charging protocol corresponding to the charging protocol circuit 114.
For example, in a specific embodiment, the charging protocol circuit 114 includes a PD protocol circuit, the main control circuit 110 may determine whether an adapter is connected, and when no adapter is connected, the charging protocol circuit 114 may send an 18W-PDO message including 5V, 9V, and 12V to the electric device, and then, according to a PDO gear selected by the electric device, the dc-dc conversion circuit 130 is controlled to output a voltage corresponding to the PDO, and the first switch circuit 120 is controlled to be turned on, and the dc-dc conversion circuit 130 quickly charges the electric device through the first switch circuit 120. The PDO is also called a PD output stage, and represents an output stage of a charger supporting a PD protocol. The PDO message typically includes information such as output voltage and output power.
In some embodiments, as shown in fig. 4, the master control circuit 110 may include a switch control circuit 112, a second switch circuit 113, and a charging protocol circuit 114.
The charging protocol circuit 114 is connected between the power supply terminal 101 and the power receiving terminal 102, and the second switch circuit 113 is connected between the power supply terminal 101 and the power receiving terminal 102. The switch control circuit 112 is connected to the first switch circuit 120 through a first switch control terminal 1121, and the switch control circuit 112 is connected to the second switch circuit 113 through a second switch control terminal 1122. Therefore, the switch control circuit 113 can control the second switch circuit 113 to be conducted, so that the power supply terminal 101 and the power receiving terminal 102 are conducted, and the adapter can quickly charge the electric equipment through the second switch circuit 113. In addition, in some embodiments, the switch control circuit 112 may also control the first switch circuit 120 to be turned on, so as to send the remaining power supply capability of the adapter to the dc-dc conversion circuit 130 through the first switch circuit 120, so as to charge the energy storage element 140.
The working principle of this embodiment may specifically include: when an adapter is accessed, the main control circuit 110 can determine whether the adapter supports a charging protocol corresponding to the charging protocol circuit 114 through the charging protocol circuit 114; if the adapter supports the charging protocol corresponding to the charging protocol circuit 114, the main control circuit 110 may obtain the voltage gear information of the adapter from the power supply terminal 101 through the charging protocol circuit 114, and send the voltage gear information of the adapter to the electric device through the power receiving terminal 102, and the main control circuit 110 may control the second switch circuit 113 to be turned on through the switch control circuit 112, so that the adapter directly and quickly charges the electric device through the second switch circuit 113. Further, when the charging protocol circuit 114 includes at least two protocol circuits, it may also be determined whether the adapter supports other charging protocols based on other protocol circuits when the adapter does not support one of the charging protocols. When the adapter supports other charging protocols, the voltage gear information is sent to the electric equipment, the adapter outputs voltage according to the corresponding voltage gear (voltage gear corresponding to the decoy adapter) according to the voltage gear selected by the electric equipment, and the main control circuit 110 controls the second switch circuit 113 to be conducted through the switch control circuit 112, so that the adapter directly and quickly charges the electric equipment through the second switch circuit 113. When the adapter does not support other charging protocols, the voltage gear information only containing one voltage gear is sent to the electric equipment, electricity is taken from the adapter according to the voltage gear, and the electric equipment is charged through the second switch circuit 113. In addition, in some embodiments, when the adapter charges the electric device through the second switch circuit 113, the remaining power supply capacity of the adapter may also be used to charge the energy storage element through the first switch circuit 120.
The working principle of the present embodiment will be specifically described by taking an example that the charging protocol circuit 114 includes a PD protocol circuit and other protocol circuits (such as at least one of a QC2.0 protocol circuit, a QC3.0 protocol circuit, an FCP protocol circuit, an SCP protocol circuit, an AFC protocol circuit, a VOOC protocol circuit, an MTK protocol circuit, an AFC protocol circuit, and a PPS protocol circuit). Specifically, the main control circuit 110 may determine whether an adapter is connected, and when no adapter is connected, the main control circuit 110 may send preset voltage gear (PDO) information (for example, 18W-PDO including 5V, 9V, and 12V) to the electric device, control the dc-dc conversion circuit 130 to output a corresponding voltage according to the PDO selected by the electric device, and control the first switch circuit 120 to be turned on through the switch control circuit 112, so that the dc-dc conversion circuit 130 charges the electric device quickly through the first switch circuit 120.
When an adapter is accessed, the main control circuit 110 judges whether the adapter supports the PD protocol through the PD protocol circuit; if the adapter supports the PD protocol, the main control circuit 110 may obtain PDO information of the adapter from the power supply terminal 101 through the PD protocol circuit, and send the PDO information of the adapter to the electric device through the power receiving terminal 102, the charging protocol circuit 114 sends the PDO selected by the electric device to the adapter, and the main control circuit 110 controls the second switch circuit 113 to be turned on through the switch control circuit 112, so that the adapter directly and quickly charges the electric device through the second switch circuit 113 according to a voltage corresponding to the PDO selected by the electric device. Additionally, in some embodiments, the remaining power supply capability of the adapter may also be used to charge the energy storage element 140 through the first switching circuit 120. It should be noted that, in some embodiments, the main control circuit 110 plays a role of transparent transmission in PD communication between the power supply terminal 101 and the power receiving terminal 102, and may control the first switch circuit 120 and the second switch circuit 113 through the switch control circuit 112 without performing excessive processing on the transmitted signal, so as to control the dc-dc conversion circuit 130 to charge the electric device and charge the electric device through the adapter.
If the adapter does not support the PD protocol, whether the adapter supports other charging protocols or not can be judged through other protocol circuits; if the adapter supports other charging protocols, the adapter can send preset PDO information to the electric equipment, the voltage gear corresponding to the adapter is tricked according to the PDO selected by the electric equipment, the second switch circuit 113 is controlled to be conducted through the switch control circuit 112, and the adapter directly charges the electric equipment through the second switch circuit 113. Therefore, by integrating the protocol circuits corresponding to the plurality of charging protocols, that is, the charging protocol circuit 114 includes the plurality of protocol circuits, the power supply circuit 100 can also trick the plurality of charging protocol inputs and convert the charging protocol inputs into PD communication to the power consumption device, thereby realizing fast charging. Additionally, in some embodiments, the remaining power supply capability of the adapter may also be used to charge the energy storage element 140 through the first switching circuit 120.
If the adapter does not support other charging protocols, the adapter can send a piece of PDO information such as 15W-PDO containing 5V to the electric equipment, at this time, the electric equipment can only select a voltage gear of 5V, the main control circuit 110 controls the second switch circuit 113 to be conducted, and the adapter directly charges the electric equipment through the second switch circuit 113. Additionally, in some embodiments, the remaining power supply capability of the adapter may also be used to charge the energy storage element 140 through the first switching circuit 120.
In summary, in the present embodiment, the charging function and the discharging function are implemented by one dc-dc conversion circuit 130, and specifically, when an adapter is connected, the main control circuit 110 controls the second switch circuit 113 to be turned on through the switch control circuit 112, the adapter directly charges the electric device through the second switch circuit 113, and the remaining power supply capability of the adapter can be further transmitted to the dc-dc conversion circuit 130 through the first switch circuit 120 to charge the energy storage element, so as to implement the charging function. When no adapter is connected, the main control circuit 110 controls the dc-dc conversion circuit 130 to raise the voltage, get power from the energy storage element 140, and control the first switch circuit 120 to be turned on through the switch control circuit 112, so that the dc-dc conversion circuit 130 supplies power to the electric device, thereby implementing the discharging function. Further, when the charging protocol circuit 114 includes protocol circuits corresponding to a plurality of charging protocols, that is, when the master circuit 110 is integrated with a plurality of protocol circuits, the power supply circuit 100 may also trick a plurality of charging protocol inputs, and convert the charging protocol inputs into PD communication to the power consuming device, so as to implement fast charging.
In some embodiments, the first switch circuit 120 and the second switch circuit 113 may be a PMOS transistor or an NMOS transistor, respectively, and are not limited herein. Taking the PMOS transistor as an example of the second switch circuit 113, the gate of the second switch circuit 113 can be connected to the second switch control terminal 1122 of the switch control circuit 112 and controlled by the switch control circuit 112, the source can be connected to the power supply terminal 101, and the drain can be connected to the power receiving terminal 102, so that when the second switch circuit 113 is turned on, power can be transmitted from the power supply terminal 101 to the power receiving terminal 102.
Taking the PMOS transistor as an example of the first switch circuit 120, the source of the first switch circuit 120 can be connected to the dc-dc conversion circuit 130, the drain of the first switch circuit 120 can be connected between the power receiving terminal 102 and the second switch circuit 113, and the gate of the first switch circuit 120 can be connected to the first switch control terminal 1121, so that when the first switch circuit 120 is turned on, the dc-dc conversion circuit 130 can supply power to the power receiving terminal 102 through the first PMOS transistor to charge the electric device, and when the source and drain voltages change, for example, the drain voltage is greater than the source voltage, current can flow from the drain to the source, for example, when the adapter charges the electric device through the second switch circuit 113, the drain voltage of the first switch circuit 120 can be greater than the source voltage, and at this time, the remaining power supply capacity of the adapter can be transmitted to the first switch circuit 120 through the second switch circuit 113, the voltage is transmitted to the dc-dc conversion circuit 130 via the first switching circuit 120 to charge the energy storage element 140.
In addition, in some embodiments, the first switch circuit 120 may include two PMOS transistors, two NMOS transistors, or one each of the PMOS transistor and the NMOS transistor, and so on. As a manner, the first switch circuit 120 may include two PMOS transistors, which are a first PMOS transistor and a second PMOS transistor respectively, at this time, the two PMOS transistors are connected in parallel, a source of the first PMOS transistor is connected to the dc-dc conversion circuit 130, a drain of the first PMOS transistor is connected to the power receiving terminal 102, a source of the second PMOS transistor is connected between the second switch circuit 113 and the power receiving terminal 102, a drain of the second PMOS transistor is connected to the dc-dc conversion circuit 130, and gates of the first PMOS transistor and the second PMOS transistor are both connected to the first switch control terminal 1121 and controlled by the switch control circuit 112.
In one example, the switch control circuit 112 may control the first PMOS transistor or the second PMOS transistor to be turned on by a high-low level signal, for example, the switch control circuit 112 may control the first PMOS transistor to be turned on by a high-level signal and control the second PMOS transistor to be turned on by a low-level signal. Specifically, when the first PMOS transistor is turned on, the dc-dc conversion circuit 130 may supply power to the power receiving terminal 102 through the first PMOS transistor to charge the power-consuming device, and when the second PMOS transistor is turned on, the remaining power supply capacity of the adapter may be transmitted to the second PMOS transistor through the second switch circuit 113, and transmitted to the dc-dc conversion circuit 130 through the second PMOS transistor to charge the energy storage element 140.
In addition, in some embodiments, the power supply circuit may also adopt a master control circuit that does not integrate a charging protocol circuit, and at this time, charging may be implemented by an external charging protocol chip. For example, the power supply circuit may connect a charging protocol chip between the main control circuit and the power supply terminal, and connect a charging protocol chip between the main control circuit and the power receiving terminal; a charging protocol chip can be connected between the power supply end and the power receiving end and connected with the main control circuit. The power supply circuit may be the power supply circuit 100 described in any of the foregoing embodiments, and on this basis, the main control circuit may adopt a main control circuit that is not integrated with the charging protocol circuit, and the main control circuit is externally connected with the charging protocol chip.
Specifically, taking the embodiment shown in fig. 4 as an example, if a first charging protocol chip 250 and a second charging protocol chip 260 are added to the power supply circuit 100 shown in fig. 4, a new power supply circuit is obtained as shown in fig. 5, and fig. 5 schematically shows another power supply circuit 200 provided by an embodiment of the present invention. In this embodiment, the power supply circuit 200 includes, in addition to the components shown in fig. 4, a first charging protocol chip 250 and a second charging protocol chip 260, where the first charging protocol chip 250 is connected between the power supply terminal 201 and the main control circuit 210, and the second charging protocol chip 260 is connected between the power receiving terminal 202 and the main control circuit 210. The first charging protocol chip 250 and the second charging protocol chip 260 are protocol chips supporting at least one charging protocol.
The charging protocol chip can be at least one of a PD protocol chip, a QC2.0 protocol chip, a QC3.0 protocol chip, an FCP protocol chip, an SCP protocol chip, an AFC protocol chip, a VOOC protocol chip, an MTK protocol chip, an AFC protocol chip and a PPS protocol chip. Different protocol chips support corresponding charging protocols, for example, a PD protocol chip supports a PD protocol, and a QC2.0 protocol chip supports a QC2.0 protocol. In addition, the protocol chip may be an existing chip, for example, taking the PD protocol chip as an example, the PD protocol chip may be an IP2716 of an english core or a CCG3PA of laplace.
Taking the first charging protocol chip 250 and the second charging protocol chip 260 as PD protocol chips as an example, the working principle of this embodiment includes that the first charging protocol chip 250 obtains PDO information of the adapter, then the main control circuit 210 obtains PDO information of the adapter from the first charging protocol chip 250, then the second charging protocol chip 260 is controlled to send PDO information of the adapter to the electric device through the power receiving terminal 202, then the second charging protocol chip 260 informs the main control circuit 210 of PDO selected by the electric device, the main control circuit 210 can control the first charging protocol chip 250 to obtain PDO corresponding to the adapter according to PDO selected by the electric device, and finally the main control circuit 210 informs the electric device that the voltage of the PDO required by the electric device is ready by controlling the second charging protocol chip, and then the electric device can be charged through the adapter. Because the main control circuit 210 can realize communication based on the charging protocol by externally connecting the charging protocol chip to charge the electric equipment, the main control circuit without the charging protocol circuit can be selected, and the cost is reduced.
In addition, in some embodiments, the power supply circuit may connect a charging protocol chip between the power supply terminal and the power receiving terminal, and the charging protocol chip is connected to the main control circuit, so as to implement communication based on a charging protocol supported by the charging protocol chip, and charge the electric device. Specifically, as shown in fig. 6, fig. 6 schematically illustrates another power supply circuit 300 provided by the embodiment of the present invention. In this embodiment, the power supply circuit 300 includes components having the same functions as those of the components shown in fig. 4, and further includes a charging protocol chip 350, where the charging protocol chip 350 is connected to the main control circuit 310 and connected between the power supply terminal 301 and the power receiving terminal 302. The charging protocol chip 350 is a protocol chip supporting at least one charging protocol, and the type of the charging protocol chip can be found in the above embodiments, which are not described herein again.
Taking the charging protocol chip 350 as a PD protocol chip as an example, the working principle of this embodiment includes that the charging protocol chip 350 acquires PDO information of the adapter, then the main control circuit 310 acquires the PDO information of the adapter from the charging protocol chip 350, then the charging protocol chip 350 is controlled to send the PDO information of the adapter to the electric device through the power receiving terminal 302, then the charging protocol chip 360 informs the main control circuit 310 of PDO selected by the electric device, the main control circuit 310 can control the charging protocol chip 350 to acquire PDO corresponding to the adapter according to the PDO selected by the electric device, and finally the main control circuit 310 informs the electric device through controlling the charging protocol chip 350 that the voltage of the PDO required by the electric device is ready, and then the electric device can be charged through the adapter. Because the main control circuit 210 can implement communication based on the charging protocol by externally connecting a charging protocol chip 350, and charge the electric device, the main control circuit without the charging protocol circuit can be selected, and the cost is reduced.
In addition, in some embodiments, the main control circuit may include one or more charging protocol circuits, and may support more charging protocols by externally connecting a charging protocol chip corresponding to a corresponding charging protocol if other charging protocols are required to be supported according to actual needs. For example, the main control circuit may be integrated with a PD protocol circuit to support PD communication, and may be externally connected with a QC2.0 protocol chip when the QC2.0 protocol needs to be supported, as a manner, the main control circuit is connected between the power supply terminal and the power receiving terminal, and the main control circuit may be connected with the power supply terminal and the power receiving terminal through one QC2.0 protocol chip respectively. The charge and discharge principle is similar to that of the above embodiments, and is not described herein again.
As shown in fig. 7, an embodiment of the present invention further provides a power supply apparatus 10, where the power supply apparatus 10 includes a housing 410 and a power supply circuit 420 according to any of the above embodiments. The power supply circuit 420 is disposed on the housing 410, the housing 410 has a first interface 412 and a second interface 414, a power supply end of the power supply circuit 420 is connected to the first interface 412, and a power receiving end is connected to the second interface 414.
The power supply device 10 may be a mobile power supply, a charging back clip, an adapter, or other charging devices that can be used to charge a power-consuming device.
Further, in some embodiments, referring to fig. 7 and 8 together, fig. 7 shows a schematic view of the power supply apparatus 10 from one perspective, and fig. 8 shows a schematic view of the power supply apparatus 10 from another perspective.
In some embodiments, as shown in fig. 7 and 8, the power supply apparatus 10 may further include a display unit 430, and the display unit 430 may be connected with the power supply circuit 420. Specifically, the display unit 430 may be connected with the main control circuit of the power supply circuit 420 to be controlled by the main control circuit. In some embodiments, the display unit 430 may be a display screen, which may be used to display the power of the power supply apparatus 10. In other embodiments, the display unit 430 may also be a device such as an LED lamp for lighting, flashing, or the like, and may be used for lighting, flashing, or the like during charging, which is not limited herein. In other embodiments, the display unit 430 may also be other devices, and is not limited herein.
In some embodiments, as shown in fig. 7 and 8, the power supply device 10 may further include a key unit 440, and the key unit 440 is connected to the power supply circuit 420. Specifically, the key unit 440 may be connected to the main control circuit of the power supply circuit 420 to be controlled by the main control circuit. In some embodiments, the key unit 440 may be a touch type or a press type key module corresponding to different control methods, so as to implement control methods such as touch control and press control.
In one embodiment, the key unit 440 may be used to control whether the power supply apparatus 10 starts charging, for example, when the user triggers the key unit 440, the power supply circuit 420 may receive the trigger signal and control the dc-dc conversion circuit to charge the electric device according to whether the adapter is connected or not, or directly charge the electric device through the adapter.
To sum up, the embodiment of the utility model provides a power supply circuit and chip, power supply circuit includes master control circuit, energy storage element, first switch circuit, direct current-direct current converting circuit, wherein, power supply circuit has feed end and receiving end, the feed end is used for connecting first interface, the receiving end is used for connecting the second interface, master control circuit connects between feed end and receiving end, first switch circuit is connected with master control circuit, direct current-direct current converting circuit and receiving end respectively, direct current-direct current converting circuit is connected with master control circuit and energy storage element respectively. Therefore, the embodiment of the utility model provides a can only adopt direct current-direct current converting circuit of the same kind to realize the function of charging and the function of discharging, but reduced cost owing to adopt direct current-direct current converting circuit of the same kind less for equipment volume can reduce, convenient production and use.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.
Claims (10)
1. A power supply circuit, comprising: the device comprises a main control circuit, a first switch circuit, a direct current-direct current conversion circuit and an energy storage element;
the power supply circuit is provided with a power supply end and a power receiving end, the power supply end is used for being connected with the first interface, and the power receiving end is used for being connected with the second interface;
the main control circuit is connected between the power supply end and the power receiving end;
the first switch circuit is respectively connected with the main control circuit, the direct current-direct current conversion circuit and the power receiving end;
the direct current-direct current conversion circuit is respectively connected with the main control circuit and the energy storage element.
2. The power supply circuit of claim 1, wherein the master control circuit comprises a switch control circuit, and wherein the first switch circuit is connected to a first switch control terminal of the switch control circuit.
3. The power supply circuit according to claim 2, wherein the main control circuit further comprises a second switch circuit, the power supply terminal is connected to the power receiving terminal through the second switch circuit, and the second switch circuit is connected to a second switch control terminal of the switch control circuit.
4. The power supply circuit of claim 3, wherein the first switch circuit and the second switch circuit are PMOS transistors or NMOS transistors, respectively.
5. The power supply circuit according to any one of claims 1 to 4, wherein the main control circuit comprises a charging protocol circuit and a switch control circuit, the charging protocol circuit is connected with the power supply terminal and the power receiving terminal, and the switch control circuit is connected with the first switch circuit.
6. The power supply circuit according to claim 1, further comprising a charging protocol chip, wherein the charging protocol chip is connected to the main control circuit and connected between the power supply terminal and the power receiving terminal.
7. The power supply circuit according to claim 1, further comprising a first charging protocol chip and a second charging protocol chip, wherein the first charging protocol chip is connected between the power supply terminal and the main control circuit, and the second charging protocol chip is connected between the power receiving terminal and the main control circuit.
8. A power supply device, comprising a housing and a power supply circuit according to any one of claims 1 to 7, wherein the power supply circuit is disposed in the housing, the housing has a first interface and a second interface, a power supply terminal of the power supply circuit is connected to the first interface, and a power receiving terminal is connected to the second interface.
9. The power supply apparatus according to claim 8, further comprising a display unit connected to the power supply circuit.
10. The power supply apparatus according to claim 8, further comprising a key unit connected to the power supply circuit.
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| CN202020234912.6U CN211790827U (en) | 2020-02-28 | 2020-02-28 | Power supply circuit and power supply device |
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| CN202020234912.6U CN211790827U (en) | 2020-02-28 | 2020-02-28 | Power supply circuit and power supply device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328505A (en) * | 2021-08-03 | 2021-08-31 | 深圳英集芯科技股份有限公司 | Charging demand adaptation method, electronic equipment and related product |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328505A (en) * | 2021-08-03 | 2021-08-31 | 深圳英集芯科技股份有限公司 | Charging demand adaptation method, electronic equipment and related product |
| CN113328505B (en) * | 2021-08-03 | 2021-10-29 | 深圳英集芯科技股份有限公司 | Charging demand adaptation method, electronic equipment and related product |
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