CN109038726B - Single-channel multi-voltage power supply multiplexing system and method - Google Patents
Single-channel multi-voltage power supply multiplexing system and method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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Abstract
The invention discloses a single-channel multi-voltage power supply multiplexing system, which comprises: the power adapter comprises a voltage conversion module and a voltage control module; the power supply multiplexing device comprises a first working module, a working control module, a second working module and a multiplexing switch; the first working module is connected with the working control module; the input end of the multiplexing switch is connected with the power adapter, the output end of the multiplexing switch is connected with the second working module, the control end of the multiplexing switch is connected with the working control module, and the working control module is used for negotiating with the voltage control module so as to control the voltage conversion module to output a corresponding voltage value and control the conduction of the input end and the output end of the multiplexing switch. The invention realizes the normal work of the power supply multiplexing device which needs to supply two working voltages in sequence by controlling different working modules of the power supply multiplexing device which inputs different voltages through a single channel.
Description
Technical Field
The invention relates to a power input technology, in particular to a single-channel multi-voltage power multiplexing system and a method.
Background
The USB Type-C interface is an interface supporting double-sided insertion of a USB interface, the worldwide problem that the USB is inserted incorrectly forever is formally solved, large current and large voltage charging is supported, and the expansion capability is strong. Therefore, in the design of network products, it is a development trend to adopt the USB Type-C interface for power supply. Different functional modules in the network product correspondingly need different starting voltages, and part of the functional modules need to be started first and then other functional modules need to be started, so that a power multiplexing switch or scheme is needed to select different input voltages to different modules of the network product.
The existing power multiplexing switch is mainly an integrated chip, such as TPS2102, TPS2115A and TPS22933 of texas instruments. Such an integrated chip generally has two or three input terminals, one or two control signal terminals, and one output terminal. As shown in fig. 1, the conventional power multiplexing switch having two input terminals, one control signal terminal and one output terminal has the following working principle: and controlling the switch to selectively switch on the first input end or the second input end according to the control signal so as to enable the voltage of the output end to be the input voltage of the first input end or the input voltage of the second end.
However, the power multiplexing switch is mainly applied to a multi-channel multi-voltage power multiplexing product and is not suitable for the network product; at present, a special power supply multiplexing scheme is not set for realizing the application requirements of the network product which supplies power by adopting the USB Type-C interface.
Disclosure of Invention
The embodiment of the invention provides a single-channel multi-voltage power supply multiplexing system and a method, which can realize the normal work of a network product which only has one power supply input channel and needs to sequentially supply two working voltages by controlling different working modules of a single-channel input different voltage supply power supply multiplexing device, and have simple scheme.
An embodiment of the present invention provides a single-channel multi-voltage power supply multiplexing system, including:
the power adapter is used for being connected with the power multiplexing device through a USB Type-C interface so as to supply power to the power multiplexing device;
the power adapter comprises a voltage conversion module and a voltage control module, wherein the voltage conversion module is connected with the voltage control module so as to output corresponding voltage to the power multiplexing device according to a control signal of the voltage control module;
the power supply multiplexing device comprises a first working module, a working control module, a second working module and a multiplexing switch;
the first working module is connected with the working control module; the multiplexing switch comprises an input end, an output end and a control end, the input end of the multiplexing switch is connected with the power adapter, the output end of the multiplexing switch is connected with the second working module, and the control end of the multiplexing switch is connected with the working control module;
the initial state of the multiplexing switch is that the input end is disconnected with the output end, and the work control module is used for carrying out communication negotiation with the voltage control module so as to determine whether to control the voltage conversion module to output a second voltage through the voltage control module and whether to control the input end and the output end of the multiplexing switch to be connected or not according to a negotiation result; the first voltage and the second voltage are not equal.
Compared with the prior art, in the single-channel multi-voltage power supply multiplexing system provided by the embodiment of the invention, the multiplexing switch is arranged at the power input end of the second working module, the voltage control module is arranged in the power adapter, and the working control module is arranged in the power multiplexing device, so that after the power adapter is connected with the power multiplexing device, the first voltage is output to start the first working module to work, and the second working module does not work; the second working module is enabled to start working only after the communication connection between the working control module and the voltage control module is established to carry out communication negotiation so as to control the voltage conversion module to output the second voltage and control the multiplex switch to be switched on, and meanwhile, the first working module also works under the second voltage so as to realize normal working of the power supply multiplex device which only has one power supply input channel and needs to successively supply two working voltages.
Further, the multiplexing switch comprises a P-channel field effect transistor and an N-channel field effect transistor; the drain electrode of P channel type field effect transistor is the input of multiplex switch, the source electrode of P channel type field effect transistor is the output of multiplex switch, the grid of P channel type field effect transistor with the drain electrode of N channel type field effect transistor is connected, the source electrode ground connection of N channel type field effect transistor, the grid of N channel type field effect transistor is the control end of multiplex switch.
Further, the voltage control module and the work control module are both microcontroller chips.
Another embodiment of the present invention provides a method for implementing multiplexing of a single-channel multi-voltage power supply, where the method for implementing multiplexing of a single-channel multi-voltage power supply is applicable to the above-mentioned system for multiplexing a single-channel multi-voltage power supply, and the method includes the following steps:
a power adapter and a power multiplexing device are switched on, and a voltage conversion module and a voltage control module of the power adapter are simultaneously connected with the first working module and the working control module;
the voltage conversion module outputs a first voltage to be supplied to the first working module and the working control module so as to start the first working module and the working control module;
after the first working module and the working control module are started, the working control module and the voltage control module carry out communication negotiation;
when the work control module and the voltage control module negotiate successfully, the voltage control module controls the voltage conversion module to output a second voltage to be supplied to the first work module and the work control module so that the first work module and the work control module work under the second voltage;
when the preset time is reached, the work control module sends a control signal to the control end of the multiplexing switch to control the input end and the output end of the multiplexing switch to be connected, so that the second work module works under a second voltage.
Further, when the preset time arrives, the work control module sends a control signal to the control end of the multiplexing switch to control the input end and the output end of the multiplexing switch to be connected, so that the second work module works under a second voltage, specifically:
when the preset time is reached, the work control module sends a control signal to the grid electrode of the N-channel type field effect tube of the multiplexing switch, so that the drain electrode and the source electrode of the N-channel type field effect tube are conducted, at the moment, the grid electrode of the P-channel type field effect tube is at a low level, the drain electrode and the source electrode of the P-channel type field effect tube are conducted, namely, the input end and the output end of the multiplexing switch are communicated, so that the second work module works under a second voltage;
the multiplexing switch comprises a P-channel field effect transistor and an N-channel field effect transistor;
the drain electrode of P channel type field effect transistor is the input of multiplex switch, the source electrode of P channel type field effect transistor is the output of multiplex switch, the grid of P channel type field effect transistor with the drain electrode of N channel type field effect transistor is connected, the source electrode ground connection of N channel type field effect transistor, the grid of N channel type field effect transistor is the control end of multiplex switch.
Compared with the prior art, the method for realizing multiplexing of the single-channel multi-voltage power supply in the embodiment of the invention outputs the first voltage to the first working module and the working control module after the power adapter and the power multiplexing device are switched on, so that the first working module starts to work, and the working control module performs communication negotiation with the voltage control module in the power adapter; when the negotiation between the work control module and the voltage control module in the power adapter is successful, the voltage control module controls the voltage conversion module to output a second voltage, and when the preset time is reached, the work control module controls the multiplexing switch to be switched on, so that the first work module and the second work module work under the second voltage, and the power multiplexing device which only has one power input channel and needs to sequentially supply two kinds of work voltages can work normally.
Drawings
Fig. 1 is a schematic structural diagram of a conventional power multiplexing switch.
Fig. 2 is a schematic structural diagram of a single-channel multi-voltage power multiplexing system according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a multiplexing switch according to a first embodiment of the present invention.
Fig. 4 is a flowchart of a method for implementing multiplexing of a single-channel multi-voltage power supply according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terminology used in the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. Furthermore, the terms "first," "second," and "third," etc. in the description and claims of the invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Referring to fig. 2, a schematic structural diagram of a single-channel multi-voltage power multiplexing system according to a first embodiment of the present invention is shown, where the single-channel multi-voltage power multiplexing system includes:
the power supply device comprises a power supply adapter 100 and a power supply multiplexing device 200, wherein the power supply adapter 100 is used for being connected with the power supply multiplexing device 200 through a USB Type-C interface so as to supply power to the power supply multiplexing device 200.
The power adapter 100 includes a voltage conversion module 101 and a voltage control module 102. The voltage conversion module 102 is connected to the voltage control module 101, so as to output a corresponding voltage to the power multiplexing apparatus 200 according to a control signal of the voltage control module 102.
The power multiplexing device 200 includes a first operation module 201, an operation control module 202, a second operation module 203, and a multiplexing switch 204.
The first work module 201 is connected with the work control module 202. The multiplexing switch 204 includes an input end, an output end, and a control end, the input end of the multiplexing switch 204 is connected to the power output end of the power adapter 100, the output end of the multiplexing switch 204 is connected to the second working module 203, and the control end of the multiplexing switch 204 is connected to the working control module 202.
In this embodiment, the initial state of the multiplexing switch 204 is that the input end is disconnected from the output end, when the power adapter 100 is connected to the power multiplexing apparatus 200, the voltage conversion module 101 outputs a first voltage to supply to the first working module 201 and the working control module 202, meanwhile, the working control module 202 performs communication negotiation with the voltage control module 102, and after the working control module 202 successfully negotiates with the voltage control module 102, the voltage control module 102 controls the voltage conversion module 101 to output a second voltage; when the preset time is reached, the working control module 202 outputs a control signal to the control end of the multiplexing switch 204 to control the input end and the output end of the multiplexing switch 204 to be connected, so that the first working module 201 and the second working module 203 work at the second voltage.
In this embodiment, the first voltage and the second voltage are not equal.
In this embodiment, the power adapter 100 is connected to the power multiplexing device 200 through a USB Type-C interface. The power multiplexing device 200 is a network product that uses a USB Type-C interface to supply power, and the first working module 201 and the second working module 203 of the power multiplexing device 200 are two functional modules of the network product.
Referring to fig. 3, a schematic structural diagram of a multiplexing switch 204 according to a first embodiment of the invention is shown.
The multiplexing switch 204 includes a P-channel fet 2041 and an N-channel fet 2042. The drain D of the P-channel fet 2041 is the input terminal of the multiplexer 204, the source S of the P-channel fet 2041 is the output terminal of the multiplexer 204, the gate G of the P-channel fet 2041 is connected to the drain D of the N-channel fet 2042, the source S of the N-channel fet 2041 is grounded, and the gate G of the N-channel fet 2042 is the control terminal of the multiplexer 204.
The specific working process of the single-channel multi-voltage power supply multiplexing system provided by the embodiment of the invention is as follows:
when the power output end of the power adapter 100 is connected to the power input end of the power multiplexing device 200 through USB Type-C, the power adapter 100 outputs a first voltage to the power multiplexing device 200 by default, and the initial state of the multiplexing switch 204 is that the input end is disconnected from the output end, at this time, the first voltage is only transmitted to the first working module 201 and the working control module 202, and after the first working module 201 and the working control module 202 are started and work at the first voltage, the working control module 202 performs communication negotiation with the voltage control module 102 in the power adapter 100; after the work control module 202 and the voltage control module 102 negotiate successfully, the voltage control module 102 controls the voltage conversion module 101 to output a second voltage to be supplied to the first work module 201 and the work control module 202, so that the first work module 201 and the work control module 202 continue to work at the second voltage; when the preset time is reached, the work control module 202 sends a control signal to the control end of the multiplexing switch 204, that is, the gate G of the N-channel fet 2042, so that the drain D and the source S of the N-channel fet 2042 are turned on; at this time, the gate G of the P-channel fet 2041 is at a low level, the drain D and the source S of the P-channel fet 2041 are turned on, that is, the input terminal and the output terminal of the multiplexer 204 are connected, so that the first operating module 201 and the second operating module 203 operate under the second voltage.
It should be noted that, in this embodiment, the voltage control module 102 and the operation control module 202 are both microcontroller chips, and each of the microcontroller chips includes a processor and a memory, where the memory stores programs for communication negotiation and operation control, and the processor is used to execute corresponding programs.
In this embodiment, when the work control module 202 and the voltage control module 102 successfully negotiate, specifically: if the working control module 202 receives the preset signal sent by the voltage control module 102 and the voltage control module 102 also receives the preset signal sent by the working control module 202, it is determined that the negotiation between the working control module 202 and the voltage control module 102 is successful.
Compared with the prior art, in the single-channel multi-voltage power supply multiplexing system provided by the embodiment of the invention, the multiplexing switch is arranged at the power input end of the second working module, the voltage control module is arranged in the power adapter, and the working control module is arranged in the power multiplexing device, so that after the power adapter is connected with the power multiplexing device, the first voltage is output to start the first working module to work, and the second working module does not work; and the voltage control module controls the voltage conversion module to output a second voltage until the work control module and the voltage control module establish communication connection and realize communication negotiation success, the work control module controls the multiplex switch to be switched on, so that the second work module starts to work, and meanwhile, the first work module also works under the second voltage to realize normal work of the power supply multiplex device which only has one power supply input channel and needs to successively supply two kinds of work voltages.
Referring to fig. 4, a flowchart of a method for implementing multiplexing of a single-channel multi-voltage power supply according to a second embodiment of the present invention is shown.
The method for realizing multiplexing of the single-channel multi-voltage power supply comprises the following steps:
s301, a power adapter and a power multiplexing device are switched on, so that a voltage conversion module and a voltage control module of the power adapter are connected with the first working module and the working control module at the same time.
In this embodiment, the input and output terminals of the multiplexing switch are initially off.
S302, the voltage conversion module outputs a first voltage to the first working module and the working control module so as to start the first working module and the working control module.
And S303, after the first working module and the working control module are started, the working control module and the voltage control module carry out communication negotiation.
In this embodiment, after the first working module and the working control module are started at the first voltage, the working control module and the voltage control module start to establish a communication connection, and when the working control module receives a preset signal sent by the voltage control module and the voltage control module also receives a preset signal sent by the working control module, it is determined that the working control module and the voltage control module negotiate successfully.
S304, after the work control module and the voltage control module negotiate successfully, the voltage control module controls the voltage conversion module to output a second voltage to be supplied to the first work module and the work control module so that the first work module and the work control module work under the second voltage.
S305, when a preset moment is reached, the work control module sends a control signal to the control end of the multiplexing switch to control the input end and the output end of the multiplexing switch to be connected, so that the second work module works under a second voltage;
the multiplexing switch comprises a P-channel field effect transistor and an N-channel field effect transistor; the drain electrode of P channel type field effect transistor is the input of multiplex switch, the source electrode of P channel type field effect transistor is the output of multiplex switch, the grid of P channel type field effect transistor with the drain electrode of N channel type field effect transistor is connected, the source electrode ground connection of N channel type field effect transistor, the grid of N channel type field effect transistor is the control end of multiplex switch.
In this embodiment, when the preset time arrives, the operation control module sends a control signal to the control end of the multiplexing switch, that is, sends a control signal to the gate of the N-channel fet, so that the drain and the source of the N-channel fet are turned on, and at this time, the gate of the P-channel fet with the N-channel fet is at a low level, and the drain and the source of the P-channel fet are turned on, that is, the input end and the output end of the multiplexing switch are turned on, so that the second operation module also operates at the second voltage.
Compared with the prior art, the method for realizing multiplexing of the single-channel multi-voltage power supply in the embodiment of the invention outputs the first voltage to the first working module and the working control module after the power adapter and the power multiplexing device are switched on, so that the first working module starts to work, and the working control module performs communication negotiation with the voltage control module in the power adapter; when the negotiation between the work control module and the voltage control module in the power adapter is successful, the voltage control module controls the voltage conversion module to output a second voltage, and when the preset time is reached, the work control module controls the multiplexing switch to be switched on, so that the first work module and the second work module both work under the second voltage, the power multiplexing device which only has one power input channel and needs to successively supply two kinds of work voltages can work normally, and the reliability is high.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. A single channel multi-voltage power multiplexing system, comprising:
the power adapter is used for being connected with the power multiplexing device through a USB Type-C interface so as to supply power to the power multiplexing device;
the power adapter comprises a voltage conversion module and a voltage control module, wherein the voltage conversion module is connected with the voltage control module so as to output corresponding voltage to the power multiplexing device according to a control signal of the voltage control module;
the power supply multiplexing device comprises a first working module, a working control module, a second working module and a multiplexing switch;
the first working module is connected with the working control module; the multiplexing switch comprises an input end, an output end and a control end, the input end of the multiplexing switch is connected with the power adapter, the output end of the multiplexing switch is connected with the second working module, and the control end of the multiplexing switch is connected with the working control module;
the initial state of the multiplexing switch is that the input end is disconnected with the output end, and the work control module is used for carrying out communication negotiation with the voltage control module so as to determine whether to control the voltage conversion module to output the second voltage or not through the voltage control module and whether to control the input end and the output end of the multiplexing switch to be connected or not according to a negotiation result.
2. The single-channel multi-voltage power multiplexing system of claim 1, wherein:
the multiplexing switch comprises a P channel type field effect transistor and an N channel type field effect transistor;
the drain electrode of P channel type field effect transistor is the input of multiplex switch, the source electrode of P channel type field effect transistor is the output of multiplex switch, the grid of P channel type field effect transistor with the drain electrode of N channel type field effect transistor is connected, the source electrode ground connection of N channel type field effect transistor, the grid of N channel type field effect transistor is the control end of multiplex switch.
3. The single-channel multi-voltage power supply multiplexing system of claim 1 or 2, wherein: the voltage control module and the work control module are both microcontroller chips.
4. A method for realizing multiplexing of a single-channel multi-voltage power supply, which is applied to the multiplexing system of the single-channel multi-voltage power supply of any one of claims 1 to 3, and is characterized by comprising the following steps:
a power adapter and a power multiplexing device are switched on, and a voltage conversion module and a voltage control module of the power adapter are simultaneously connected with the first working module and the working control module;
the voltage conversion module outputs a first voltage to be supplied to the first working module and the working control module so as to start the first working module and the working control module;
after the first working module and the working control module are started, the working control module and the voltage control module carry out communication negotiation;
when the work control module and the voltage control module negotiate successfully, the voltage control module controls the voltage conversion module to output a second voltage to be supplied to the first work module and the work control module so that the first work module and the work control module work under the second voltage;
when the preset time is reached, the work control module sends a control signal to the control end of the multiplexing switch to control the input end and the output end of the multiplexing switch to be connected, so that the second work module works under a second voltage.
5. The method according to claim 4, wherein when the predetermined time arrives, the operation control module sends a control signal to the control terminal of the multiplexing switch to control the input terminal and the output terminal of the multiplexing switch to be connected, so that the second operation module operates at the second voltage, specifically:
when the preset time is reached, the work control module sends a control signal to the grid electrode of the N-channel field effect transistor of the multiplexing switch, so that the drain electrode and the source electrode of the N-channel field effect transistor are conducted, the grid electrode of the P-channel field effect transistor is at a low level, the drain electrode and the source electrode of the P-channel field effect transistor are conducted, the input end and the output end of the multiplexing switch are connected, and the second work module works under a second voltage;
the multiplexing switch comprises a P-channel field effect transistor and an N-channel field effect transistor;
the drain electrode of P channel type field effect transistor is the input of multiplex switch, the source electrode of P channel type field effect transistor is the output of multiplex switch, the grid of P channel type field effect transistor with the drain electrode of N channel type field effect transistor is connected, the source electrode ground connection of N channel type field effect transistor, the grid of N channel type field effect transistor is the control end of multiplex switch.
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| CN106033884B (en) * | 2015-03-19 | 2019-03-15 | 鸿富锦精密工业(武汉)有限公司 | DC power control system and circuit |
| CN105720631B (en) * | 2016-01-22 | 2019-02-05 | 珠海市魅族科技有限公司 | A kind of electric terminal and charging equipment |
| CN106329620A (en) * | 2016-08-31 | 2017-01-11 | 珠海智融科技有限公司 | High-voltage rapid charging circuit structure through multiplexing of single-power-supply multi-port output |
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