CN207939234U - A kind of low-power consumption QI wireless charging circuits - Google Patents
A kind of low-power consumption QI wireless charging circuits Download PDFInfo
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- CN207939234U CN207939234U CN201820314107.7U CN201820314107U CN207939234U CN 207939234 U CN207939234 U CN 207939234U CN 201820314107 U CN201820314107 U CN 201820314107U CN 207939234 U CN207939234 U CN 207939234U
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- 238000007600 charging Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 83
- 239000004065 semiconductor Substances 0.000 claims abstract description 38
- 230000010355 oscillation Effects 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000004913 activation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
Abstract
The utility model discloses a kind of low-power consumption QI wireless charging circuits, with sequentially connected controller, oscillation module, transmitting coil（L2）, and the load detecting module that is connected between transmitting coil and controller；The controller controls the break-make and break-make frequency of metal-oxide-semiconductor in oscillation module, oscillation module is made to enter charge mode or detection pattern；The oscillation module generates resonance with the transmitting coil, and transmitting coil emits charging wave and detection wave outward respectively under charge mode or detection pattern；The load detecting module feeds back detection voltage according to the voltage change on transmitting coil, and the controller enters charge mode when there is load according to detection voltage-controlled oscillating module, enters detection pattern when non-loaded；Compared with prior art, the utility model detection load is rapid and low in energy consumption, does not need button or shakes mobile power activation, use is very convenient, and customer experience sense is greatly improved.
Description
Technical field
The utility model is related to charging equipment more particularly to a kind of low-power consumption QI wireless charging circuits.
Background technology
The Portable movables charging equipment such as present mobile power, charger baby many all has QI wireless charging circuits, can
Wirelessly give the charging of the electronic products such as mobile phone, tablet.Existing QI wireless chargings technology mainly has：1, pass through button
QI wireless transmissions are activated, if detecting load, carry out QI wireless transmissions；Non-loaded or load, which removes to enter after a certain period of time, stops
It sleeps or output is closed, if necessary to carry out QI wireless transmissions again, it is necessary to push button exciting again.2, it shakes mobile power and activates QI
Wireless transmission, because there is Shaking switch in inside, therefore operation principle is similar with the first.3, QI wireless transmitter modules not suspend mode, one
Directly loaded in detection.
The first and second of technology, it is low in energy consumption, but want button every time, can not at any time in carry out wireless charging
Function, therefore client's use feeling is bad.The third customer perception is good, but power consumption is very big, and average current is to MA grades, mobile electricity
The electricity in source can be depleted quickly, influence the use of mobile power.
Utility model content
The utility model is the above problem of the prior art to be solved, and proposes a kind of low-power consumption QI wireless charging circuits.
In order to solve the above technical problems, the utility model proposes technical solution be a kind of low-power consumption QI wireless chargings of design
Circuit with sequentially connected controller, oscillation module, transmitting coil, and is connected between transmitting coil and controller
Load detecting module；The controller controls the break-make and break-make frequency of metal-oxide-semiconductor in oscillation module, oscillation module is made to enter
Charge mode or detection pattern；The oscillation module generates resonance with the transmitting coil, under charge mode or detection pattern
Transmitting coil emits charging wave and detection wave outward respectively；The load detecting module is anti-according to the voltage change on transmitting coil
Feeding out representative is unloaded, has load or have the detection voltage of foreign matter, and the controller is according to detection voltage-controlled oscillating module
Enter charge mode when there is load, enter detection pattern when non-loaded.
The oscillation module has the third metal-oxide-semiconductor controlled by the controller, the 4th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor, the 7th
Metal-oxide-semiconductor, wherein the third and fourth metal-oxide-semiconductor is serially connected between DC power supply and the 15th resistance, the 6th and the 7th metal-oxide-semiconductor is serially connected in
Between DC power supply and the 15th resistance, the other end of the 15th resistance is grounded, and the tie point of third and fourth metal-oxide-semiconductor connects
Connect one end of the transmitting coil, another termination resonant capacitance group and the load detecting module of transmitting coil, resonant capacitance
The other end of group connects the tie point of the 6th and the 7th MOS.
The third metal-oxide-semiconductor and the 6th metal-oxide-semiconductor use PMOS tube, the 4th metal-oxide-semiconductor and the 7th metal-oxide-semiconductor to use NMOS
Pipe.
The 13rd energy storage filter capacitor and the 17th energy storage filter capacitor are connected between the DC power supply and ground.
There is the load detecting module diode, the anode of diode to connect the transmitting coil by second resistance
The other end, the 5th capacitance in parallel, the 20th resistance, divider resistance group, the divider resistance between the cathode and ground of diode
Group is connected in series by the 5th resistance and the tenth resistance, and the tie point of the 5th and the tenth resistance sends the detection voltage to the control
Device processed.
The resonant capacitance group includes in parallel the 8th resonant capacitance, the 9th resonant capacitance, the tenth resonant capacitance, the 11st
Resonant capacitance.
It includes to emit the detection phase of the detection wave and do not send out that the detection pattern, which has detection cycle, a detection cycle,
Penetrate the standby phase of the detection wave.
The detection cycle between 500 to 1000 milliseconds, the detection phase between 400 to 500 microseconds, the detection
The frequency of wave is between 175 to 205 kHz.
The duty ratio of the detection cycle between 10% to 50%, it is described detection wave frequency 175 to 205 kHz it
Between.
For the DC power supply 3.0 between 6.0V, the detection voltage has floating voltage（V0）, have load voltage,
There is foreign matter voltage, there is load voltage to be less than floating voltage 10% to 20%, there is foreign matter voltage to be more than floating voltage 10% to 20%.
Compared with prior art, the utility model detection load is rapid and low in energy consumption, does not need button or shakes mobile electricity
Source is activated, and use is very convenient, and customer experience sense is greatly improved.
Description of the drawings
Fig. 1 is the functional block diagram of the utility model preferred embodiment；
Fig. 2 is the circuit diagram that module is swung in the utility model preferred embodiment；
Fig. 3 is the circuit diagram of the utility model preferred embodiment load detecting module；
Fig. 4 is the utility model preferred embodiment detection cycle schematic diagram；
Fig. 5 is that the utility model preferred embodiment detects phase and detection voltage-contrast figure.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is described in further detail the utility model.It should be appreciated that specific embodiment described herein is used only for explaining this
Utility model is not used to limit the utility model.
The utility model discloses a kind of low-power consumption QI wireless charging circuits, referring to the original of the preferred embodiment shown in Fig. 1
Block diagram is managed, with sequentially connected controller, oscillation module, transmitting coil L2, and is connected to transmitting coil and controller
Between load detecting module；The controller controls the break-make and break-make frequency of metal-oxide-semiconductor in oscillation module, makes oscillation module
Into charge mode or detection pattern；The oscillation module generates resonance with the transmitting coil, in charge mode or detection mould
Transmitting coil emits charging wave and detection wave outward respectively under formula；The load detecting module becomes according to the voltage on transmitting coil
Change, which feeds back representative, to be unloaded, has load or have the detection voltage of foreign matter（TEST）, the controller is according to detection voltage
Voltage value judgement is currently unloaded, has load still to have foreign matter, so control oscillation module enter when there is load charge mode,
Enter detection pattern when non-loaded.
Thereby structure, charging circuit just enter charge mode when having detected load, and detection load is rapid, and power consumption
It is low, it does not need button or shakes mobile power activation, use is very convenient, and customer experience sense is greatly improved
Referring to Fig. 2 shows preferred embodiment swing the circuit diagram of module, the oscillation module has by the controller control
Third metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the 6th metal-oxide-semiconductor Q6, the 7th metal-oxide-semiconductor Q7 of system, wherein the third and fourth metal-oxide-semiconductor is serially connected in
Between DC power supply VCC and the 15th resistance R15, the 6th and the 7th metal-oxide-semiconductor is serially connected between DC power supply and the 15th resistance,
The other end of 15th resistance is grounded, and the tie point of third and fourth metal-oxide-semiconductor connects one end of the transmitting coil L2, is sent out
The other end of another termination resonant capacitance group and the load detecting module of ray circle, resonant capacitance group connects the 6th He
The tie point of 7th MOS.
Third, the four, the six, the 7th metal-oxide-semiconductors constitute H bridge oscillating circuits in Fig. 2, are the power in QI wireless transmitting systems
Transmitting portion.L2 is transmitting coil, emits electromagnetic wave, i.e. wireless power transmission outward.It can both emit charging wave, and having can be with
Transmitting detection wave.The resonant capacitance group includes the 8th resonant capacitance C8 of parallel connection, the 9th resonant capacitance in the preferred embodiment
C9, the tenth resonant capacitance C10, the 11st resonant capacitance C11, they and L2 connect, and constitute oscillation emitting portion together.PWM1、
PWM2, PWM3, PWM4 are the 4 road PWM that controller is sent out, for controlling H bridges.In the preferred embodiment, the third metal-oxide-semiconductor
Q3 and the 6th metal-oxide-semiconductor Q6 uses PMOS tube, the 4th metal-oxide-semiconductor Q4 and the 7th metal-oxide-semiconductor Q7 to use NMOS tube.Pass through switch MOS
Pipe gives L2 charging and dischargings, generates electromagnetic wave.In the preferred embodiment, the 13rd energy storage is connected between the DC power supply and ground
Filter capacitor C13 and the 17th energy storage filter capacitor C17.C13, C17 are the energy storage filter capacitors of DC power supply.R12, R21 are
Pull down resistor, R15 are current sampling resistors.
The circuit diagram of the preferred embodiment load detecting module shown referring to Fig. 3, the load detecting module have two poles
Pipe D2, the anode of diode connects the other end of the transmitting coil by second resistance R2, between the cathode and ground of diode
The 5th capacitance C5 of parallel connection, the 20th resistance R20, divider resistance group, the divider resistance group is by the 5th resistance R5 and the tenth resistance
R10 is connected in series, and the tie point of the 5th and the tenth resistance sends the detection voltage TEST to the controller.Transmitting coil L2
Outward when transmitting detection wave, according to the difference for placing article on transmitting coil, the voltage fed back is different.R2 is
Current-limiting resistance, D2 are a diodes, because coil come out be AC signal, by diode shaping, at subsequent conditioning circuit
Reason.R5, R10, C5 are low-pass filters, filter high-frequency signal.It may be noted that in Fig. 3 C3 connection diodes cathode, can be with
It allows the signal of D2 to pass to subsequent detecting circuit by C3 to be handled, detecting circuit connects controller, and controller is according to detection
The signal of circuit carries out feedback control to PWM1, PWM2, PWM3, PWM4, to stablize the output of wireless charging.Detecting circuit processing
It is not the essential features of this patent, therefore does not discuss.5th resistance R5 and the tenth resistance R10 series connection partial pressures, detection is tied
Fruit gives controller, and controller controls oscillation module and enters charge mode when there is load, when non-loaded according to testing result
Into detection pattern.
The detection pattern is examined with detection cycle Tin referring to the preferred embodiment shown in Fig. 4, and a detection cycle includes
Emit detection phase Ts2 of the detection wave and does not emit the standby phase of the detection wave.The detection cycle Tin 500 to
1000 milliseconds（ms）Between, detection phase Ts2 is in 400 to 500 microseconds（us）Between, it is described detection wave frequency 175 to
205 kHz（kHz）Between.Transmitting coil L2 emits detection wave outward in detection phase Ts2, and transmission frequency is higher, and the time is longer,
So power consumption is higher.It is transferred to charge mode if detecting load；If not detecting load, waiting one is standby
Then phase sends the detection wave of Ts2 times again.Because detecting, wave tranmitting frequency is high and the time is short, therefore ensemble average power consumption
Small, ensemble average power consumption is in microampere order, therefore this patent can accomplish the automatic detection of low-power consumption load.
The duty ratio of the detection cycle Tin is between 10% to 50% in other embodiments, the frequency of the detection wave
Between 175 to 205 kHz.
3.0 between 6.0V, the detection voltage TEST has floating voltage V0, has load the DC power supply VCC
Voltage V1, there is foreign matter voltage V2, there is load voltage to be less than floating voltage 10% to 20%, there is foreign matter voltage to be more than floating voltage 10%
To 20%.In other words, it is foreign matter that detection voltage TEST is indicated above with respect to floating voltage V0 increases 10%, reduces 10% with upper table
Show it is load.Fig. 5 shows detection phase and detection voltage-contrast figure, when transmitting coil L2 emits detection wave outward, transmitting
500us can detect that burning voltage, V0 indicate do not have foreign matter or QI wireless receivings on transmitting coil in Fig. 2 at TEST
Voltage waveform when equipment, V1 are waveforms when placing the load of QI wireless receivings, and V2 is waveform when placing larger foreign matter.In this way
When detecting that TEST signal voltages are lower, then it represents that there is the load of QI wireless receivings to be placed on transmitting coil, it is wireless then to carry out QI
Charging；Otherwise it does not detect that TEST signal voltages are lower, is then directly entered suspend mode, suspend mode is for a period of time（Hundred Milliseconds）Afterwards certainly
It is dynamic to wake up, then detected next time, so recycle.
It thereby realizes within the very short time（Microsecond grade）It detects either with or without QI radio receivers, and in length
In time（Hundred Milliseconds）Into low-power consumption power down mode, therefore ensemble average power consumption is very low, realizes average power consumption microampere order
Automatic detection function.
Above example is by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications of progress or change, shall be included in the scope of claims of this application.
Claims (10)
1. a kind of low-power consumption QI wireless charging circuits, it is characterised in that：With sequentially connected controller, oscillation module, transmitting
Coil（L2）, and the load detecting module that is connected between transmitting coil and controller；
The break-make and break-make frequency of metal-oxide-semiconductor in controller control oscillation module, make oscillation module enter charge mode or
Detection pattern；
The oscillation module generates resonance with the transmitting coil, and transmitting coil difference is outside under charge mode or detection pattern
Transmitting charging wave and detection wave；
The load detecting module feeds back representative according to the voltage change on transmitting coil to be unloaded, has load or have foreign matter
Detection voltage（TEST）, the controller according to detection voltage-controlled oscillating module enter when there is load charge mode,
Enter detection pattern when non-loaded.
2. low-power consumption QI wireless charging circuits as described in claim 1, it is characterised in that：The oscillation module has by described
The third metal-oxide-semiconductor of controller control（Q3）, the 4th metal-oxide-semiconductor（Q4）, the 6th metal-oxide-semiconductor（Q6）, the 7th metal-oxide-semiconductor（Q7）, wherein third
It is serially connected in DC power supply with the 4th metal-oxide-semiconductor（VCC）With the 15th resistance（R15）Between, the 6th and the 7th metal-oxide-semiconductor is serially connected in direct current
Between power supply and the 15th resistance, the other end of the 15th resistance is grounded, and the tie point of third and fourth metal-oxide-semiconductor connects institute
State transmitting coil（L2）One end, another termination resonant capacitance group and the load detecting module of transmitting coil, resonant capacitance
The other end of group connects the tie point of the 6th and the 7th MOS.
3. low-power consumption QI wireless charging circuits as claimed in claim 2, it is characterised in that：The third metal-oxide-semiconductor（Q3）With
Six metal-oxide-semiconductors（Q6）Using PMOS tube, the 4th metal-oxide-semiconductor（Q4）With the 7th metal-oxide-semiconductor（Q7）Using NMOS tube.
4. low-power consumption QI wireless charging circuits as claimed in claim 3, it is characterised in that：Connect between the DC power supply and ground
Connect the 13rd energy storage filter capacitor（C13）With the 17th energy storage filter capacitor（C17）.
5. low-power consumption QI wireless charging circuits as claimed in claim 4, it is characterised in that：The load detecting module has two
Pole pipe（D2）, the anode of diode passes through second resistance（R2）Connect the other end of the transmitting coil, the cathode of diode with
5th capacitance in parallel between ground（C5）, the 20th resistance（R20）, divider resistance group, the divider resistance group is by the 5th resistance
（R5）With the tenth resistance（R10）It is connected in series, the tie point of the 5th and the tenth resistance sends the detection voltage（TEST）To institute
State controller.
6. low-power consumption QI wireless charging circuits as claimed in claim 5, it is characterised in that：The resonant capacitance group includes parallel connection
The 8th resonant capacitance（C8）, the 9th resonant capacitance（C9）, the tenth resonant capacitance（C10）, the 11st resonant capacitance（C11）.
7. such as claim 2 to 6 any one of them low-power consumption QI wireless charging circuits, it is characterised in that：The detection pattern
With detection cycle（Tin）, a detection cycle includes to emit the detection phase of the detection wave（Ts2）The detection is not emitted
The standby phase of wave.
8. low-power consumption QI wireless charging circuits as claimed in claim 7, it is characterised in that：The detection cycle（Tin）500
To between 1000 milliseconds, the detection phase（Ts2）Between 400 to 500 microseconds, the frequency of the detection wave is 175 to 205,000
Between hertz.
9. low-power consumption QI wireless charging circuits as claimed in claim 7, it is characterised in that：The detection cycle（Tin）Account for
Empty ratio is between 10% to 50%, and the frequency of the detection wave is between 175 to 205 kHz.
10. low-power consumption QI wireless charging circuits as claimed in claim 9, it is characterised in that：The DC power supply（VCC）
3.0 between 6.0V, the detection voltage（TEST）With floating voltage（V0）, have load voltage（V1）, have foreign matter voltage
（V2）, there is load voltage to be less than floating voltage 10% to 20%, there is foreign matter voltage to be more than floating voltage 10% to 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820314107.7U CN207939234U (en) | 2018-03-07 | 2018-03-07 | A kind of low-power consumption QI wireless charging circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820314107.7U CN207939234U (en) | 2018-03-07 | 2018-03-07 | A kind of low-power consumption QI wireless charging circuits |
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| Publication Number | Publication Date |
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| CN207939234U true CN207939234U (en) | 2018-10-02 |
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| CN201820314107.7U Expired - Fee Related CN207939234U (en) | 2018-03-07 | 2018-03-07 | A kind of low-power consumption QI wireless charging circuits |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211598A (en) * | 2020-02-12 | 2020-05-29 | 华为技术有限公司 | Wireless charging circuit, wireless charging method, wireless charging equipment and wireless charging system |
| CN111371192A (en) * | 2020-03-24 | 2020-07-03 | 山东大学 | Method and system for matching robot wireless charging power and protecting open circuit |
| CN114157050A (en) * | 2022-01-04 | 2022-03-08 | 深圳市力生美半导体股份有限公司 | Wireless charging circuit and method with low standby power consumption |
| WO2023040847A1 (en) * | 2021-09-17 | 2023-03-23 | 维沃移动通信有限公司 | Electronic device and control method |
-
2018
- 2018-03-07 CN CN201820314107.7U patent/CN207939234U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211598A (en) * | 2020-02-12 | 2020-05-29 | 华为技术有限公司 | Wireless charging circuit, wireless charging method, wireless charging equipment and wireless charging system |
| WO2021159764A1 (en) * | 2020-02-12 | 2021-08-19 | 华为技术有限公司 | Wireless charging circuit, wireless charging method, device, and system |
| CN111371192A (en) * | 2020-03-24 | 2020-07-03 | 山东大学 | Method and system for matching robot wireless charging power and protecting open circuit |
| CN111371192B (en) * | 2020-03-24 | 2022-06-10 | 山东大学 | Method and system for matching robot wireless charging power and protecting open circuit |
| WO2023040847A1 (en) * | 2021-09-17 | 2023-03-23 | 维沃移动通信有限公司 | Electronic device and control method |
| CN114157050A (en) * | 2022-01-04 | 2022-03-08 | 深圳市力生美半导体股份有限公司 | Wireless charging circuit and method with low standby power consumption |
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Granted publication date: 20181002 |