CN107492934B - Electronic device with power supply circuit - Google Patents
Electronic device with power supply circuit Download PDFInfo
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- CN107492934B CN107492934B CN201710846698.2A CN201710846698A CN107492934B CN 107492934 B CN107492934 B CN 107492934B CN 201710846698 A CN201710846698 A CN 201710846698A CN 107492934 B CN107492934 B CN 107492934B
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- 238000001514 detection method Methods 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Abstract
The invention discloses an electronic device with a power supply circuit, which belongs to the technical field of electronics, wherein the power supply circuit comprises: the external power supply comprises an external power supply interface, a first switch circuit, a second switch circuit, a power supply interface detection circuit and an output interface, wherein the external power supply interface comprises a first external power supply interface and a second external power supply interface, when the external power supply is connected with the first external power supply interface, the external power supply supplies power to the system power utilization circuit through the first switch circuit, when the external power supply is connected with the second external power supply interface, the external power supply supplies power to the system power utilization circuit through the second switch circuit, and when the external power supply is connected with the first external power supply interface and the second external power supply interface simultaneously, the external power supply supplies power to the system power utilization circuit through the first switch circuit. The electronic device with the power supply circuit has a simple structure and an automatic detection function, can realize single-path or double-path parallel power supply, and realizes cooperative work of automatic detection and switching of a DC interface and a USB Type-C interface power supply mode.
Description
Technical Field
The present disclosure relates to electronic devices, and particularly to an electronic device with a power supply circuit.
Background
There are a variety of USB interfaces currently on the market, including: (1) Type-A: the standard version USB interface, type-A is the most common USB interface Type, is commonly used on computers, has some remarkable problems, namely directional requirements, and a connector (a male port) can be inserted into an interface (a female port) from a specific direction, but the inserting process is frequently in error due to the fact that the two surfaces of the USB male port are very similar in appearance; 2) Micro-B: the USB standard interface of the mobile device adopts a Micro USB interface (namely USB Micro-B) in most android mobile phones at present, and the interface is still widely applied to various mobile portable devices until now; (3) USB Type-C: the new novel USB interface that appears, this interface has advantages such as small in size, positive and negative both can insert, fast (10 Gb), and although Type-C interface appears soon, but can foresee, along with the maturity of USB Type-C technique, various notebook, panel computer even smart mobile phone in the future can all begin to popularize USB Type-C interface. Along with the popularization of USB Type-C, more and more consumer electronic products adopt the USB Type-C interface to take on functions of charging, data transmission, display and output of the system.
Disclosure of Invention
The invention aims to provide an electronic device with a power supply circuit, wherein the power supply circuit can supply power to a system power utilization circuit through a first switch circuit when only an external power supply is connected to a first external power supply interface, and can supply power to the system power utilization circuit through a second switch circuit when only the external power supply is connected to a second external power supply interface, and can supply power to the system power utilization circuit through the first switch circuit when the external power supply is simultaneously connected to the first external power supply interface and the second external power supply interface.
The technical scheme provided by the invention is as follows:
the invention provides an electronic device with a power supply circuit, the power supply circuit comprises:
the external power supply comprises a first external power supply interface and a second external power supply interface, wherein the first external power supply interface is used for being connected with an external power supply, the first switching circuit comprises a first double-channel MOS tube and is arranged between the first external power supply interface and the output interface, the second switching circuit comprises a second double-channel MOS tube and is arranged between the second external power supply interface and the output interface, and the power supply interface detection circuit is arranged between the first external power supply interface and the first switching circuit and between the second switching circuit, and the output interface is used for being connected with a system power utilization circuit;
when the first external power supply interface is connected with an external power supply and the second external power supply interface is not connected with the external power supply, the first switch circuit is turned on, and the external power supply forms a passage with the output interface through the first switch circuit to supply power to the system power utilization circuit;
when the first external power supply interface is not connected with the external power supply, the second switch circuit is conducted, and the external power supply forms a passage with the output interface through the second switch circuit to supply power to the system power utilization circuit;
when the first external power supply interface and the second external power supply interface are connected with an external power supply at the same time, the first switch circuit is turned on, the second switch circuit is turned off, and the external power supply forms a passage with the output interface through the first switch circuit to supply power to the system power utilization circuit.
According to an embodiment of the present invention, the power interface detection circuit includes a first path detection circuit and a second path detection circuit, the first path detection circuit includes a fifth MOS transistor, the fifth MOS transistor is an N-type MOS transistor, a gate of the fifth MOS transistor is connected to the first external power interface through a first resistor, a source is grounded, a drain is connected to the output interface through a second resistor and a first capacitor, and the second resistor and the first capacitor are connected in parallel; the second path detection circuit comprises a fourth resistor, and the grid electrode of the second double-channel MOS tube is connected with the first external power interface through the fourth resistor.
According to another embodiment of the invention, the first dual-channel MOS tube and the second dual-channel MOS tube are dual-P type MOS tubes, the first dual-channel MOS tube comprises a first MOS tube and a second MOS tube, and the second dual-channel MOS tube comprises a third MOS tube and a fourth MOS tube.
According to another embodiment of the present invention, a source electrode of the first MOS transistor of the first switching circuit is connected to the first external power interface, a gate electrode of the first MOS transistor is connected to a drain electrode of the fifth MOS transistor, a drain electrode of the first MOS transistor of the first switching circuit is connected to a drain electrode of the second MOS transistor, a source electrode of the second MOS transistor of the first switching circuit is connected to the output interface, and a gate electrode of the second MOS transistor of the first switching circuit is connected to a drain electrode of the fifth MOS transistor.
According to another embodiment of the present invention, the first switching circuit further includes a diode, a cathode of the diode is connected to the first external power interface, an anode of the diode is connected to the drain of the fifth MOS transistor through a third resistor and a second capacitor, and the third resistor and the second capacitor are connected in parallel.
According to another embodiment of the present invention, a source electrode of the third MOS transistor of the second switching circuit is connected to the second external power interface, a gate electrode is grounded through a fifth resistor, a drain electrode is connected to a drain electrode of the fourth MOS transistor, a source electrode of the fourth MOS transistor is connected to the output interface, and a gate electrode is connected to a gate electrode of the third MOS transistor.
According to another embodiment of the present invention, the first external power interface and the second external power interface are a DC interface and a USB Type-C interface, respectively.
According to another embodiment of the present invention, the system further includes a third switching circuit for detecting an on state of the first external power interface, and when the external power is connected to the first external power interface, the third switching circuit is turned on to notify the system that the first external power interface is connected to the external power.
According to another embodiment of the present invention, the third switching circuit includes a sixth MOS transistor, a system VCC voltage terminal, and a state output terminal, where a gate of the sixth MOS transistor is connected to the first external power supply interface through a sixth resistor and to ground through a seventh resistor, a source is grounded, and a drain is connected to the system VCC voltage terminal through an eighth resistor and to the state output terminal through a ninth resistor, respectively.
According to another embodiment of the present invention, the sixth MOS transistor is an N-type MOS transistor.
The beneficial effects of the invention are as follows:
the invention relates to an electronic device with a power supply circuit, which has a simple structure and comprises an external power supply interface, a first switch circuit, a second switch circuit, a power supply interface detection circuit and an output interface. The USB Type-C interface is added on the basis of original DC charging, any power input start of the USB Type-C, DC can be realized, the system is not powered down when the single/double-circuit power input of the start state is switched, the DC can be used for replacing battery input power supply when the USB Type-C enters a data transmission mode, and the cooperation of the DC interface and the USB Type-C interface power supply mode is realized. The electronic device with the power supply circuit has the advantages that the power consumption loss of the power supply circuit is low, the switch circuit formed by the MOS tube is adopted, the occupied area of the PCB is low, and the response time is quick.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an electronic device with a power supply circuit according to the present invention;
fig. 2 is a schematic diagram of a first embodiment of a power supply circuit of the electronic device according to the present invention;
fig. 3 is a schematic diagram of a second embodiment of a power supply circuit of an electronic device according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
In one aspect, as shown in fig. 1, the present invention provides an electronic device having a power supply circuit, the power supply circuit including: the external power supply interface 10, the first switch circuit 20, the second switch circuit 30, the power supply interface detecting circuit 50 and the output interface 40, the external power supply interface comprises a first external power supply interface 11 and a second external power supply interface 12 for accessing external power supply, the first switch circuit 20 comprises a first double-channel MOS tube 21 (not shown in the figure) arranged between the first external power supply interface 11 and the output interface 40, the second switch circuit 30 comprises a second double-channel MOS tube 31 (not shown in the figure) arranged between the second external power supply interface 12 and the output interface 40, the power supply interface detecting circuit 50 is arranged between the first external power supply interface 11 and the first 20 and the second switch circuit 30, the output interface 40 is used for connecting a system power utilization circuit,
when the first external power supply interface is connected with an external power supply and the second external power supply interface is not connected with the external power supply, the first switch circuit is conducted, and the external power supply forms a passage with the output interface through the first switch circuit to supply power to the system power utilization circuit;
when the first external power supply interface is not connected with the external power supply, the second switch circuit is conducted, and the external power supply forms a passage with the output interface through the second switch circuit to supply power to the system power utilization circuit;
when the first external power supply interface and the second external power supply interface are simultaneously connected with an external power supply, the first switch circuit is turned on, the second switch circuit is turned off, and the external power supply forms a passage with the output interface through the first switch circuit to supply power to the system power utilization circuit.
The electronic device with the power supply circuit is simple in structure and comprises an external power supply interface, a first switch circuit, a second switch circuit, a power supply interface detection circuit and an output interface, the first external power supply interface and the second external power supply interface are switched through the first switch circuit and the second switch circuit to supply power, when only an external power supply is connected to the first external power supply interface, the external power supply supplies power to a system power utilization circuit through the first switch circuit, when only the external power supply is connected to the second external power supply interface, the external power supply supplies power to the system power utilization circuit through the second switch circuit, when the external power supply is simultaneously connected to the first external power supply interface and the second external power supply interface, the external power supply supplies power to the system power utilization circuit through the first switch circuit, the electronic device is simple in structure and has an automatic detection function, single-circuit or double-circuit parallel power supply can be realized, and automatic detection switching of different interfaces can be realized.
As an example of the embodiment of the present invention, as shown in fig. 1 and 2, the power interface detection circuit 50 of the embodiment of the present invention includes a first path detection circuit 51 and a second path detection circuit 52, where the first path detection circuit 51 includes a fifth MOS transistor Q5, the fifth MOS transistor is an N-type MOS transistor, a gate G (1 pin) of the fifth MOS transistor Q5 is connected to the first external power interface through a first resistor R1, a source S (2 pin) is grounded, a drain D (3 pin) is connected to the output interface through a second resistor R2 and a first capacitor C1, the second resistor R2 and the first capacitor C1 are connected in parallel, the second path detection circuit 52 includes a fourth resistor R4, and gates G (2, 5 pins) of the second dual-channel MOS transistor are connected to the first external power interface through the fourth resistor R4.
As an illustration of the embodiment of the present invention, as shown in fig. 2, the first dual-channel MOS transistor and the second dual-channel MOS transistor in the embodiment of the present invention are dual-P-type MOS transistors, where the first dual-channel MOS transistor includes a first MOS transistor Q1 and a second MOS transistor Q2, and the second dual-channel MOS transistor includes a third MOS transistor Q3 and a fourth MOS transistor Q4. The whole power supply circuit of the embodiment of the invention has low power loss, and the power consumption during conduction is reduced by adopting the switching circuit formed by the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube.
As another illustration of the embodiment of the present invention, as shown in fig. 2, a source S (1 pin) of a first MOS transistor Q1 of the first switch circuit is connected to a first external power interface, a gate G (2 pin) is connected to a drain D (3 pin) of a fifth MOS transistor Q5, a drain D (6 pin/7 pin) is connected to a drain D (8 pin/3 pin) of a second MOS transistor Q2, a source S (4 pin) of the second MOS transistor Q2 of the first switch circuit is connected to an output interface, and a gate G (5 pin) is connected to a drain D (3 pin) of the fifth MOS transistor.
The electronic device provided by the embodiment of the invention adopts the fifth MOS tube, and the loop formed by the parallel connection of the second resistor R2 and the first capacitor C1, so that the system is not powered down when the single/double-path power input is switched.
As another illustration of the embodiment of the present invention, as shown in fig. 2, the first switching circuit of the embodiment of the present invention further includes a diode OR1, wherein a cathode of the diode OR1 is connected to the first external power interface, an anode of the diode OR1 is connected to the drain D (3 pins) of the fifth MOS transistor via a third resistor R3 and a second capacitor C2, and the third resistor R3 and the second capacitor C2 are connected in parallel. The diode of the first switching circuit can effectively prevent electric leakage.
As another illustration of the embodiment of the present invention, as shown in fig. 2, a source S (1 pin) of a third MOS transistor Q3 of the second switch circuit of the embodiment of the present invention is connected to a second external power interface, a gate G (2 pin) is grounded through a fifth resistor R5, a drain D (6 pins/7 pins) is connected to a drain D (3 pins/8 pins) of a fourth MOS transistor Q4, a source S (4 pins) of the fourth MOS transistor Q4 is connected to an output interface, and a gate G (5 pins) is connected to a gate G (2 pins) of the third MOS transistor Q3.
As another illustration of the embodiment of the present invention, as shown in fig. 2, the first external power interface and the second external power interface of the embodiment of the present invention are a DC interface and a USB Type-C interface, respectively. According to the embodiment of the invention, the USB Type-C interface is added on the basis of original DC charging, so that any power input startup of the USB Type-C, DC can be realized, the system is not powered down when the single/double-path power input is switched in the startup state, and DC can be used for replacing battery input to supply power when the USB Type-C enters a data transmission mode, so that the cooperation of the DC interface and the USB Type-C interface power supply mode is realized.
The first switching circuit and the second switching circuit operate as follows:
when an external power supply is connected to a first external power supply interface, namely a DC interface, a grid electrode S of a fifth MOS tube Q5 is in a high level, the fifth MOS tube Q5 is conducted, a drain electrode D is grounded, grid electrodes G of a first MOS tube Q1 and a second MOS tube Q2 are in a low level, and the first MOS tube Q1 and the second MOS tube Q2 are conducted, namely a first switch circuit is conducted; the grid electrode G of the third MOS tube and the grid electrode G of the fourth MOS tube are high level, the third MOS tube and the fourth MOS tube are cut off, namely the second switch circuit is not conducted, at the moment, an external power supply forms a passage with the output interface through the DC interface and the first switch circuit, and power is supplied to the system power utilization circuit.
When an external power supply is connected to a second external power supply interface, namely an USB Type-C interface, the grid electrodes G of the third MOS tube and the fourth MOS tube are low-level, and the third MOS tube and the fourth MOS tube are conducted, namely a second switch circuit is conducted; the grid electrode S of the fifth MOS tube Q5 is low level, the grid electrode G of the fifth MOS tube Q5 is cut off, the grid electrodes G of the first MOS tube Q1 and the second MOS tube Q2 are high level, the first MOS tube Q1 and the second MOS tube Q2 are cut off, namely the first switch circuit is not conducted, at the moment, an external power supply forms a passage with the output interface through the USB Type-C interface and the second switch circuit, and power is supplied to the system power utilization circuit.
When an external power supply is connected to a first external power supply interface, namely a DC interface, and a second external power supply interface, namely a USB Type-C interface, simultaneously, the grid electrode S of the fifth MOS tube Q5 is in a high level, the fifth MOS tube Q5 is conducted, the drain electrode D is grounded, the grid electrode G of the first MOS tube Q1 and the grid electrode G of the second MOS tube Q2 are in a low level, and the first MOS tube Q1 and the second MOS tube Q2 are conducted, namely a first switch circuit is conducted; the grid electrode G of the third MOS tube and the grid electrode G of the fourth MOS tube are high level, the third MOS tube and the fourth MOS tube are cut off, namely the second switch circuit is not conducted, at the moment, an external power supply forms a passage with the output interface through the DC interface and the first switch circuit, and power is supplied to the system power utilization circuit.
As another illustration of the embodiment of the present invention, as shown in fig. 3, a third switch circuit 60 is further included to detect the connection status of the first external power interface, and when the external power is connected to the first external power interface, the third switch circuit is turned on to notify the system that the first external power interface is plugged into the external power.
As another illustration of the embodiment of the present invention, as shown in fig. 3, the third switching circuit includes a sixth MOS transistor Q6, a system VCC voltage terminal, and a state output terminal dc_det_h, where the sixth MOS transistor is an N-type MOS transistor, a gate G (1 leg) of the sixth MOS transistor Q6 is connected to the first external power interface via a sixth resistor R6 and is grounded via a seventh resistor R7, a source S (2 leg) is grounded, and a drain D (3 leg) is connected to the system VCC voltage terminal via an eighth resistor R8 and to the state output terminal dc_det_h via a ninth resistor R9, respectively. The electronic device provided by the embodiment of the invention can detect whether the external power supply is inserted or not through the third switch circuit, so that the system is convenient for power supply configuration, and the function of the power supply circuit is more optimized.
The third switching circuit operates as follows:
when an external power supply is connected to a first external power supply interface, namely a DC interface, a grid G of a sixth MOS transistor Q6 is in a high level, the sixth MOS transistor Q6 is conducted, at the moment, a system VCC voltage end is grounded through an eighth resistor R8, and a state output end DC_DET_H outputs a low level signal; when the external power supply is not connected to the first external power supply interface, i.e. the DC interface, the gate G of the sixth MOS transistor Q6 is at a low level, the sixth MOS transistor Q6 is turned off, and at this time, the state output terminal dc_det_h outputs a high level signal.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (7)
1. An electronic device having a power supply circuit, the power supply circuit comprising:
the external power supply interface comprises a first external power supply interface and a second external power supply interface which are used for being connected with an external power supply, the first switch circuit comprises a first double-channel MOS tube which is arranged between the first external power supply interface and the output interface, the second switch circuit comprises a second double-channel MOS tube which is arranged between the second external power supply interface and the output interface, the power supply interface detection circuit is arranged between the first external power supply interface and the first and second switch circuits, the output interface is used for being connected with a system power utilization circuit,
when the first external power supply interface is connected with an external power supply and the second external power supply interface is not connected with the external power supply, the first switch circuit is conducted, and the external power supply and the output interface form a passage through the first switch circuit to supply power to a system power utilization circuit;
when the second external power supply interface is connected with an external power supply and the first external power supply interface is not connected with the external power supply, the second switch circuit is conducted, and the external power supply and the output interface form a passage through the second switch circuit to supply power to the system power utilization circuit;
when the first external power supply interface and the second external power supply interface are connected with an external power supply at the same time, the first switch circuit is turned on, the second switch circuit is turned off, and the external power supply forms a passage with the output interface through the first switch circuit to supply power to a system power utilization circuit;
the first external power interface and the second external power interface are a DC interface and a USB Type-C interface respectively;
the system also comprises a third switch circuit, wherein the third switch circuit is used for detecting the access state of the first external power interface, and when the external power is accessed to the first external power interface, the third switch circuit is conducted to inform the system that the first external power interface is plugged into the external power.
2. The electronic device with the power supply circuit according to claim 1, wherein the power interface detection circuit comprises a first path detection circuit and a second path detection circuit, the first path detection circuit comprises a fifth MOS transistor, the fifth MOS transistor is an N-type MOS transistor, a gate of the fifth MOS transistor is connected to the first external power interface through a first resistor, a source of the fifth MOS transistor is grounded, a drain of the fifth MOS transistor is connected to the output interface through a second resistor and a first capacitor, the second resistor is connected in parallel with the first capacitor, the second path detection circuit comprises a fourth resistor, and a gate of the second dual-channel MOS transistor is connected to the first external power interface through the fourth resistor.
3. The electronic device with the power supply circuit according to claim 2, wherein the first dual-channel MOS transistor and the second dual-channel MOS transistor are dual-P-type MOS transistors, the first dual-channel MOS transistor includes a first MOS transistor and a second MOS transistor, and the second dual-channel MOS transistor includes a third MOS transistor and a fourth MOS transistor.
4. The electronic device with power supply circuit according to claim 3, wherein a source electrode of the first MOS transistor of the first switching circuit is connected to the first external power supply interface, a gate electrode is connected to a drain electrode of the fifth MOS transistor, a drain electrode is connected to a drain electrode of the second MOS transistor, a source electrode of the second MOS transistor of the first switching circuit is connected to the output interface, and a gate electrode is connected to a drain electrode of the fifth MOS transistor.
5. The electronic device with power supply circuit according to claim 4, wherein the first switching circuit further comprises a diode, a cathode of the diode is connected to the first external power interface, an anode of the diode is connected to the drain of the fifth MOS transistor via a third resistor and a second capacitor, and the third resistor and the second capacitor are connected in parallel.
6. The electronic device with a power supply circuit according to claim 3, wherein a source electrode of a third MOS transistor of the second switching circuit is connected to the second external power supply interface, a gate electrode is grounded via a fifth resistor, a drain electrode is connected to a drain electrode of the fourth MOS transistor, a source electrode of the fourth MOS transistor is connected to the output interface, and a gate electrode is connected to a gate electrode of the third MOS transistor.
7. The electronic device with the power supply circuit according to claim 1, wherein the third switching circuit comprises a sixth MOS transistor, a system VCC voltage terminal and a status output terminal, the sixth MOS transistor is an N-type MOS transistor, a gate of the sixth MOS transistor is connected to the first external power supply interface via a sixth resistor and is grounded via a seventh resistor, a source is grounded, and a drain is connected to the system VCC voltage terminal via an eighth resistor and to the status output terminal via a ninth resistor, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846698.2A CN107492934B (en) | 2017-09-19 | 2017-09-19 | Electronic device with power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846698.2A CN107492934B (en) | 2017-09-19 | 2017-09-19 | Electronic device with power supply circuit |
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| Publication Number | Publication Date |
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| CN107492934A CN107492934A (en) | 2017-12-19 |
| CN107492934B true CN107492934B (en) | 2024-01-30 |
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| CN201710846698.2A Active CN107492934B (en) | 2017-09-19 | 2017-09-19 | Electronic device with power supply circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215772542U (en) * | 2021-07-27 | 2022-02-08 | 广州视源电子科技股份有限公司 | Power supply circuit and electronic equipment |
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| WO2015131335A1 (en) * | 2014-03-04 | 2015-09-11 | 华为终端有限公司 | Charging circuit and terminal |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202872406U (en) * | 2012-09-19 | 2013-04-10 | 青岛海信移动通信技术股份有限公司 | Interface multiplexing circuit and mobile terminal |
| WO2015131335A1 (en) * | 2014-03-04 | 2015-09-11 | 华为终端有限公司 | Charging circuit and terminal |
| CN104716715A (en) * | 2015-04-02 | 2015-06-17 | 青岛歌尔声学科技有限公司 | Multi-battery-based power supply circuit and electronic product with power supply circuit |
| CN205335883U (en) * | 2015-12-18 | 2016-06-22 | 深圳微步信息股份有限公司 | Dull and stereotyped three routes charging circuit |
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| CN107492934A (en) | 2017-12-19 |
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