CN106849336A - Switching circuit of the unicoil in wireless charging and the double applications of NFC - Google Patents
Switching circuit of the unicoil in wireless charging and the double applications of NFC Download PDFInfo
- Publication number
- CN106849336A CN106849336A CN201710161410.8A CN201710161410A CN106849336A CN 106849336 A CN106849336 A CN 106849336A CN 201710161410 A CN201710161410 A CN 201710161410A CN 106849336 A CN106849336 A CN 106849336A
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- Prior art keywords
- wireless charging
- nfc
- coupler
- photo
- switching circuit
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- 238000007600 charging Methods 0.000 title claims abstract description 97
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- 102100032533 ADP/ATP translocase 1 Human genes 0.000 claims description 6
- 101000768061 Escherichia phage P1 Antirepressor protein 1 Proteins 0.000 claims description 6
- 101000796932 Homo sapiens ADP/ATP translocase 1 Proteins 0.000 claims description 6
- 210000001699 lower leg Anatomy 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008713 feedback mechanism Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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- 230000009711 regulatory function Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- H02J7/025—
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to wireless charging technical field, specifically related to switching circuit of the unicoil in the double applications of wireless charging and NFC, it includes wireless charging module, microcontroller, NFC module, switching circuit and coil, the microcontroller, wireless charging module, NFC module and coil are electrically connected with switching circuit, the microcontroller sends a control signal to switching circuit, control switching circuit is switched between the first circuit path and second circuit passage, first circuit path connects NFC module and coil, the second circuit channel connection wireless charging module and coil.The present invention is used in wireless charging transmitting terminal system, easy to operate, stable performance, and wireless charging and NFC mutually switch, and do not interfere with each other, the efficient stable of common guarantee wireless charging process.
Description
Technical field
The present invention relates to wireless charging technical field, and in particular to unicoil cutting in wireless charging and the double applications of NFC
Change circuit.
Background technology
With the continuous progress of wireless charging skill technology, wireless charger with wireless charging function and equipment is electrically charged
Also make rapid progress.Existing wireless charger is charged generally by the way of electromagnetic induction to being electrically charged equipment, at some
In with scene, due to occurring in wireless charging energy electromagnetic during other loads, the wireless charger generally also can persistently be given
Energy is given, so as to cause to heat and damage equipment, or even potential safety hazard is produced.Furthermore, in order to ensure the ageing of wireless charging,
The charging transmitting terminal of usual wireless charger is constantly in opening, which results in energy consumption under no load
Waste.
The content of the invention
Therefore, the switching circuit the invention provides a kind of unicoil in wireless charging and the double applications of NFC, is used in nothing
Line charges in transmitting end system, and easy to operate, stable performance, wireless charging and NFC mutually switch, and do not interfere with each other, common guarantee
The efficient stable of wireless charging process.
To achieve the above object, the switching circuit the invention provides unicoil in wireless charging and the double applications of NFC, its
Including wireless charging module, microcontroller, NFC module, switching circuit and coil, the microcontroller, wireless charging module,
NFC module and coil are electrically connected with switching circuit, and the microcontroller sends a control signal to switching circuit, control switching
Circuit is switched between the first circuit path and second circuit passage, and first circuit path connects NFC module and line
Circle, the second circuit channel connection wireless charging module and coil.
Further, the switching circuit includes the first photo-coupler U1, the second photo-coupler U2, the 3rd photo-coupler U3
With the 4th photo-coupler U4, the microcontroller is the MCU of model nRF52832, and the wireless charging module is model
The WP of MAP7201,
Wherein the control end of the first photo-coupler U1 and the 4th photo-coupler U4 is connected, and the end is controlled by the first I/O port SW1 of MCU
System, first load end of the first photo-coupler U1 is connected to one end ANT1 of coil, and the of the first photo-coupler U1
Two load ends are connected to the WP_ANT1 pin of wireless charging module, and first load end of the 4th photo-coupler U4 is connected to nothing
The WP_ANT2 pin of line charging module, second load end of the 4th photo-coupler U4 is connected to the other end ANT2 of coil, and
Matching connection electric capacity C1, the second photo-coupler U2 and the 3rd between the WP_ANT1 pin and WP_ANT2 pin of wireless charging module
The control end of photo-coupler U3 is connected, and the end is controlled by the second I/O port SW2 of MCU, and the first of the second photo-coupler U2
The second load that load is connected to the first pin NFC_ANT1, the second photo-coupler U2 of NFC module is connected to the one of coil
First load of end ANT1, the 3rd photo-coupler U3 is connected to the other end ANT2, the 3rd photo-coupler U3 of coil
The second load be connected to the crus secunda NFC_ANT2 of NFC module, and NFC module the first pin NFC_ANT1 and crus secunda NFC_
Matching connection electric capacity C2 between ANT2.
Further, the switching circuit is constituted using relay and its peripheral circuit.
Further, the switching circuit is constituted using semiconductor switch and its peripheral circuit.
Prior art is different from, above-mentioned technical proposal has the advantages that：
1st, technical scheme connects microcontroller, nothing respectively by designing a switching circuit, switching circuit connection
Line charging module, NFC module and coil, and control switching circuit in the first circuit path by the control signal of microcontroller and
Switched between second circuit passage.The present invention is negative in the internal appearance of wireless charging energy electromagnetic by accurately controlling
When load, whole charging circuit automatically switches to second circuit passage from second circuit passage, it is to avoid energy persistently gives,
So as to avoid whole wireless charging system from being generated heat and damage or generation potential safety hazard in the course of the work due to constantly locating.
2nd, it is identified using switching circuit, intelligently can be carried out between the first circuit path and second circuit passage certainly
Dynamic switching, the transmitting terminal of wireless charging module is in opening without the moment, effectively saves power consumption.
3rd, the circuit in the present invention constantly can precisely feed back in charging process and be electrically charged equipment by NFC interfaces
Battery and the state such as temperature so that more reliable and safer regulation transmitting terminal.
4th, by feedback mechanism, the transmitting terminal of wireless charging module can dynamically adjust power, adapt to transmitting and
The a variety of wireless charging distances of receiving terminal, and reduce overload or temperature that the waste of power and receiving terminal are likely to occur
Hidden danger.
5th, the present invention switches the coil of circuit communication one by one, by switching circuit in the first circuit path and second circuit
Switching between passage, so that realize carrying out intelligent switching between wireless charging NFC, it is achieved thereby that using same coil certainly
Adapt to the switching of the high-power and NFC small-power passages of wireless charging.Without separately being protected to NFC coils and circuit, again can
The damage for avoiding NFC circuits from being likely to result under high-power wireless charging energy of electromagnetic field.Simultaneously by what high-power wireless
Rechargeable energy will be interfered to NFC communication, it is necessary to which the energy of pause wireless charging is launched when using NFC communication, therefore single
Coil shares switching and can be fully solved the various problems of the above.
6th, the present invention is applied in wireless charging transmitting terminal system, easy to operate, stable performance, wireless charging and NFC phases
Mutually switching, does not interfere with each other, the efficient stable of common guarantee wireless charging process.Using optical coupler in wireless charging in example of the present invention
Switched over to sharing single coil between circuit, and NFC circuit.Similarly, the optical coupler can be other Electronic Controls
Switching device, such as relay, or semiconductor switch etc..
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention 2.
Description of reference numerals：
1. wireless charging module, 2. microcontroller, 3.NFC modules, 4. switching circuit, 5. microcontroller.
Specific embodiment
To describe technology contents, structural feature, the objects and the effects of technical scheme in detail, below in conjunction with specific reality
Apply example and coordinate accompanying drawing to be explained in detail.
Embodiment 1：
Refer to shown in Fig. 1, the switching circuit of the unicoil of the present embodiment 1 in wireless charging and the double applications of NFC, it includes nothing
Line charging module 1, microcontroller 2, NFC module 3, switching circuit 4 and coil 5, the microcontroller 2, wireless charging module 1,
NFC module 3 and coil 4 are electrically connected with switching circuit 4, and the microcontroller 2 sends a control signal to switching circuit, control
Switching circuit 4 is switched between the first circuit path and second circuit passage, and first circuit path connects NFC module
And coil, the second circuit channel connection wireless charging module and coil.NFC module technology maturation price stabilization is cheap.
Embodiment 2：
With reference to shown in Fig. 1 and Fig. 2, in order to further illustrate invention, should in wireless charging and NFC pairs in the unicoil of embodiment 2
Switching circuit in, lists a detailed circuit theory to carry out the elaboration of the principle of the invention, in the present embodiment 2,
It is the more detailed expansion to embodiment 1, therefore all circuit structures in embodiment 1 is contained in the present embodiment 2, and
In the more detailed scheme of the present embodiment 2, the switching circuit includes the first photo-coupler U1, the second photo-coupler U2, the
Three photo-coupler U3 and the 4th photo-coupler U4, the microcontroller is the MCU of model nRF52832, the wireless charging mould
Block is the WP of model MAP7201, certainly in other embodiment, it would however also be possible to employ the microcontroller and nothing of other models
Line charging module.
Wherein the control end of the first photo-coupler U1 and the 4th photo-coupler U4 is connected, and the end is by first I/O port of MCU
SW1 is controlled, and first load end of the first photo-coupler U1 is connected to one end ANT1 of coil, the first photo-coupler U1
The second load end be connected to the WP_ANT1 pin of wireless charging module, the first load end connection of the 4th photo-coupler U4
To the WP_ANT2 pin of wireless charging module, second load end of the 4th photo-coupler U4 is connected to the other end of coil
Matching connection electric capacity C1 between ANT2, and the WP_ANT1 pin and WP_ANT2 pin of wireless charging module, second photo-coupler
The control end of U2 and the 3rd photo-coupler U3 is connected, and the end is controlled by the second I/O port SW2 of MCU, second photo-coupler
The second load that first load of U2 is connected to the first pin NFC_ANT1, the second photo-coupler U2 of NFC module is connected to
First load of one end ANT1 of coil, the 3rd photo-coupler U3 is connected to the other end ANT2 of coil, the 3rd light
Second load of coupler U3 is connected to the crus secunda NFC_ANT2 of NFC module, and the first pin NFC_ANT1 of NFC module and the
Matching connection electric capacity C2 between two pin NFC_ANT2.
In further embodiments, the switching circuit can also use other electronically controlled switching devices, such as relay
Device, or semiconductor switch etc..It is simply interior using the circuit of relay or other semiconductor switch as the circuit of the present embodiment
Portion's realization principle optocoupler is to control rear class to switch by light, and relay is to control rear class to switch with electromagnetism.Only needed on circuit
Change U1/U2/U3/U4 into corresponding devices.Faster it is suitable for high frequency compared to the switch motion with relay, optocoupler
The switching of signal.
Be incorporated into NFC function in wireless charging by the present embodiment, as the communication interface of wireless charging, it is ensured that wireless charging
Safety and stability；Acquiescence NFC mode of operations, have effectively saved energy consumption；The switching that unicoil passes through photo-coupler, connects respectively
To in two different application circuits, by adjusting respective matching capacitance, it is ensured that two circuits can effectively work.
The operation principle of the present embodiment：
Under default situations, for low, SW2 is height to the control mouth SW1 of MCU, and at this moment coil COIL passes through photo-coupler U2, U3 and NFC
Circuit is connected, and oscillating circuit is constituted with C2, and at this moment wireless charging base is in NFC mode of operations, is communicated with extraneous by NFC,
The equipment of having detected whether needs to charge.Such as having detected equipment needs to charge, then system automatically switches to wireless charging pattern, together
When switchback NFC patterns at regular intervals, confirm charging equipment whether also on wireless charging base；As do not detected charging
Equipment, then system be in NFC patterns all the time, at this moment system is in the low-power consumption stage, can effective energy-conservation.As SW1, for high, SW2 is
When low, coil is connected by photo-coupler U1, U4 with wireless charging circuit, and oscillating circuit is constituted with C1, and system is in wireless charging
Power mode, to the equipment charge being placed on wireless charging base.
The present embodiment applies to wireless charging base, and wireless charging base acquiescence is in into NFC mode of operations, detection
Whether having equipment needs to charge, and greatly reduces system power dissipation, energy saving.Need to charge when NFC module has detected equipment
When, the ID of identification equipment simultaneously records the information such as electricity while being switched to the pattern of wireless charging, so when there is many set wireless chargings
Equipment is charged simultaneously when, each transmitting terminal can accurately identify connected equipment, it is ensured that many complete equipments simultaneously charge without
Can influence each other.
Prior art is different from, the present embodiment has the advantages that：
1st, technical scheme connects microcontroller, nothing respectively by designing a switching circuit, switching circuit connection
Line charging module, NFC module and coil, and control switching circuit in the first circuit path by the control signal of microcontroller and
Switched between second circuit passage.The present invention is negative in the internal appearance of wireless charging energy electromagnetic by accurately controlling
When load, whole charging circuit automatically switches to second circuit passage from second circuit passage, it is to avoid energy persistently gives,
So as to avoid whole wireless charging system from being generated heat and damage or generation potential safety hazard in the course of the work due to constantly locating.
2nd, it is identified using switching circuit, intelligently can be carried out between the first circuit path and second circuit passage certainly
Dynamic switching, the transmitting terminal of wireless charging module is in opening without the moment, effectively saves power consumption.
3rd, the circuit in the present invention is by the way that NFC interfaces can constantly precisely feedback be electrically charged equipment in charging process
The state such as cell voltage and temperature, and then more reliable and safer regulation transmitting terminal.Regulatory function is the realization on software,
By taking single battery core lithium ion or lithium polymer battery as an example, when cell voltage is detected less than 3v or during more than 4.1v, now battery
In trickle or constant-voltage charge pattern, the power of transmitting terminal is reduced；When cell voltage is detected between 3v-4.1v, now
Battery is in constant current charging mode, improves the power of transmitting terminal.
4th, by feedback mechanism, the transmitting terminal of wireless charging module can dynamically adjust power, adapt to transmitting and
The a variety of wireless charging distances of receiving terminal, and reduce overload or temperature that the waste of power and receiving terminal are likely to occur
Hidden danger.For example when it is 3cm with the distance of transmitting terminal to detect receiving terminal, receiving terminal is met by transmission power can be reduced
Power demands；And when the distance of receiving terminal and transmitting terminal is 8cm, now need the power for improving transmitting terminal to meet reception
The power demands at end.
5th, the present invention switches the coil of circuit communication one by one, by switching circuit in the first circuit path and second circuit
Switching between passage, so that realize carrying out intelligent switching between wireless charging NFC, it is achieved thereby that using same coil certainly
Adapt to the switching of the high-power and NFC small-power passages of wireless charging.Without separately being protected to NFC coils and circuit, again can
The damage for avoiding NFC circuits from being likely to result under high-power wireless charging energy of electromagnetic field.Simultaneously by what high-power wireless
Rechargeable energy will be interfered to NFC communication, it is necessary to which the energy of pause wireless charging is launched when using NFC communication, therefore single
Coil shares switching and can be fully solved the various problems of the above.
6th, the present invention is applied in wireless charging transmitting terminal system, easy to operate, stable performance, wireless charging and NFC phases
Mutually switching, does not interfere with each other, the efficient stable of common guarantee wireless charging process.Using optical coupler in wireless charging in example of the present invention
Switched over to sharing single coil between circuit, and NFC circuit.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.And, term " including ", "comprising" or its any other variant be intended to
Nonexcludability is included, so that process, method, article or terminal device including a series of key elements not only include those
Key element, but also other key elements including being not expressly set out, or also include being this process, method, article or end
The intrinsic key element of end equipment.In the absence of more restrictions, limited by sentence " including ... " or " including ... "
Key element, it is not excluded that also there is other key element in the process including the key element, method, article or terminal device.This
Outward, herein, " it is more than ", " being less than ", " exceeding " etc. are interpreted as not including this number；" more than ", " below ", " within " etc. understand
It is to include this number.
Although being described to the various embodiments described above, those skilled in the art once know basic wound
The property made concept, then can make other change and modification to these embodiments, so embodiments of the invention are the foregoing is only,
Not thereby scope of patent protection of the invention, the equivalent structure that every utilization description of the invention and accompanying drawing content are made are limited
Or equivalent flow conversion, or other related technical fields are directly or indirectly used in, similarly it is included in patent of the invention
Within protection domain.
Claims (4)
1. switching circuit of the unicoil in the double applications of wireless charging and NFC, it is characterised in that including：It includes wireless charging
Module, microcontroller, NFC module, switching circuit and coil, the microcontroller, wireless charging module, NFC module and coil
It is electrically connected with switching circuit, the microcontroller sends a control signal to switching circuit, and control switching circuit is in the first electricity
Switched between paths and second circuit passage, first circuit path connects NFC module and coil, second electricity
Paths connect wireless charging module and coil.
2. switching circuit of the unicoil according to claim 1 in the double applications of wireless charging and NFC, it is characterised in that
The switching circuit includes the first photo-coupler U1, the second photo-coupler U2, the 3rd photo-coupler U3 and the 4th photo-coupler U4,
The microcontroller is the MCU of model nRF52832, and the wireless charging module is the WP of model MAP7201, wherein the
The control end of one photo-coupler U1 and the 4th photo-coupler U4 is connected, and the end is controlled by the first I/O port SW1 of MCU, and described the
First load end of one photo-coupler U1 is connected to one end ANT1 of coil, and second load end of the first photo-coupler U1 connects
The WP_ANT1 pin of wireless charging module are connected to, first load end of the 4th photo-coupler U4 is connected to wireless charging module
WP_ANT2 pin, second load end of the 4th photo-coupler U4 is connected to the other end ANT2 of coil, and wireless charging mould
Matching connection electric capacity C1, the second photo-coupler U2 and the 3rd photo-coupler U3 between the WP_ANT1 pin and WP_ANT2 pin of block
Control end be connected, and the end by MCU the second I/O port SW2 control, the second photo-coupler U2 first load be connected to
Second load of the first pin NFC_ANT1, the second photo-coupler U2 of NFC module is connected to one end ANT1 of coil, described
First load of the 3rd photo-coupler U3 is connected to the other end ANT2 of coil, and second load of the 3rd photo-coupler U3 connects
It is connected between the crus secunda NFC_ANT2 of NFC module, and the first pin NFC_ANT1 and crus secunda NFC_ANT2 of NFC module and connects
Matching capacitance C2.
3. switching circuit of the unicoil according to claim 1 in the double applications of wireless charging and NFC, it is characterised in that
The switching circuit is constituted using relay and its peripheral circuit.
4. switching circuit of the unicoil according to claim 1 in the double applications of wireless charging and NFC, it is characterised in that
The switching circuit is constituted using semiconductor switch and its peripheral circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161410.8A CN106849336B (en) | 2017-03-17 | 2017-03-17 | Switching circuit of the unicoil in wireless charging and the double applications of NFC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161410.8A CN106849336B (en) | 2017-03-17 | 2017-03-17 | Switching circuit of the unicoil in wireless charging and the double applications of NFC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106849336A true CN106849336A (en) | 2017-06-13 |
| CN106849336B CN106849336B (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710161410.8A Active CN106849336B (en) | 2017-03-17 | 2017-03-17 | Switching circuit of the unicoil in wireless charging and the double applications of NFC |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120149301A1 (en) * | 2010-12-13 | 2012-06-14 | Qualcomm Incorporated | Receiver for near field communication and wireless power functionalities |
| CN102780515A (en) * | 2012-07-26 | 2012-11-14 | 中兴通讯股份有限公司 | Method and apparatus for achieving compatibility of wireless charging and near field communication (NFC) |
| CN202565017U (en) * | 2011-12-13 | 2012-11-28 | 中国矿业大学(北京) | Automatic dual power supply conversion controller |
| CN103312362A (en) * | 2012-03-13 | 2013-09-18 | 宏碁股份有限公司 | Mobile device and control method thereof |
| CN206517166U (en) * | 2017-03-17 | 2017-09-22 | 简极科技有限公司 | Unicoil switching circuit |
-
2017
- 2017-03-17 CN CN201710161410.8A patent/CN106849336B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120149301A1 (en) * | 2010-12-13 | 2012-06-14 | Qualcomm Incorporated | Receiver for near field communication and wireless power functionalities |
| CN202565017U (en) * | 2011-12-13 | 2012-11-28 | 中国矿业大学(北京) | Automatic dual power supply conversion controller |
| CN103312362A (en) * | 2012-03-13 | 2013-09-18 | 宏碁股份有限公司 | Mobile device and control method thereof |
| CN102780515A (en) * | 2012-07-26 | 2012-11-14 | 中兴通讯股份有限公司 | Method and apparatus for achieving compatibility of wireless charging and near field communication (NFC) |
| CN206517166U (en) * | 2017-03-17 | 2017-09-22 | 简极科技有限公司 | Unicoil switching circuit |
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| Publication number | Publication date |
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| CN106849336B (en) | 2018-06-05 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Switching circuit of single coil in double applications of wireless charging and NFC Effective date of registration: 20190909 Granted publication date: 20180605 Pledgee: Lin Zhihong Pledgor: GENGEE TECHNOLOGY Co.,Ltd. Registration number: Y2019980000128 |
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