CN107482795A - A kind of 6.78Mhz resonance wireless charging receiving circuit - Google Patents
A kind of 6.78Mhz resonance wireless charging receiving circuit Download PDFInfo
- Publication number
- CN107482795A CN107482795A CN201710832256.2A CN201710832256A CN107482795A CN 107482795 A CN107482795 A CN 107482795A CN 201710832256 A CN201710832256 A CN 201710832256A CN 107482795 A CN107482795 A CN 107482795A
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- Prior art keywords
- circuit
- fet
- resistance
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- source electrode
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention discloses a kind of 6.78Mhz resonance wireless charging receiving circuit, including diode (D1, D2), FET (M1, M2, M3, M4), inductance Lout, electric capacity Cout, resistance (R1, R2), rectifier control circuit, low-dropout regulator, protection circuit, buffer (Vhpwm, Vlpwm), level shifting circuit, V/I sensor circuits, dead-time control circuit, comparator CMP, error amplifier EA, the double slope ADCs of 8 bit, I2C interface circuit, frequency-adjustable circuit, BLE modules, temperature sense circuit, biasing circuit and reference circuit.It integrates an AC DC converter and DC DC converters and protection circuit, protects power switch；System is operated in 6.78MHz and coupled using resonance, can use smaller inductance.Therefore compared with existing system, there is higher robustness and more preferable spatial degrees of freedom.
Description
Technical field
The present invention relates to wireless charging technical field, more particularly to a kind of 6.78Mhz resonance wireless charging receiving circuit.
Background technology
With the fast development of mobile phone market, the research for mobile phone wireless charging technique is widely paid close attention to.Wirelessly
The application of charging technique can simplify the charging process of mancarried electronic aid and improve the convenience of consumer.It is wireless in order to ensure
Charging technique is more widely used, and high efficiency and spatial degrees of freedom the two technical problems must be resolved.Wireless charging
Power technology at present mainly with two kinds of mode of operations：Inductive and resonance coupling.Inductive is by transmitting coil and receives line
The magnetic induction of circle is realized to be transmitted to the energy of remote electronics.The efficiency that generally inductive can be more than 90%, but need
More accurately to be aligned and shorter transmission range (several centimetres).By contrast, resonance coupling employs magnetic resonance coupling phenomenon, by
In loose coupling characteristic, there is more preferable spatial degrees of freedom.Due to longer transmission log, resonance coupling ratio inductive is more inhaled
Gravitation.
The content of the invention
The embodiment of the present invention provides a kind of 6.78Mhz resonance wireless charging receiving circuit, and it integrates an AC-DC converter
And dc-dc, it is prior including a protection circuit, power switch can be protected on startup；System is operated in
6.78MHz and coupled using resonance, system can use smaller inductance.Therefore compared with existing system, there is higher Shandong
Rod and more preferable spatial degrees of freedom.
A kind of 6.78Mhz resonance wireless charging receiving circuit, including diode D1, diode D2, FET M1, field effect
Should pipe M2, FET M3, FET M4, inductance Lout, electric capacity Cout, resistance R1, resistance R2, rectifier control circuit, low
Pressure difference voltage-stablizer, protection circuit, buffer Vhpwm, buffer Vlpwm, level shifting circuit, V/I sensor circuits, dead time
Control circuit, comparator CMP, error amplifier EA, 8-bit double slope ADC, I2C interface circuit, frequency-adjustable circuit, BLE moulds
Group, temperature sense circuit, biasing circuit and reference circuit, two voltage output ends of rectifier control circuit are respectively connecting to field effect
Should pipe M1 grid and FET M2 grid, FET M1 drain electrode is connected to FET M3's by diode D1
Source electrode, FET M2 drain electrode are connected to FET M3 source electrode, protection circuit connection scene effect by diode D2
Pipe M3 source electrode, FET M1 source electrode and FET M2 source grounding, one of dead-time control circuit are defeated
Go out end and be connected to FET M3 grid by level shifting circuit and buffer Vhpwm, dead-time control circuit it is another
One output end is connected to FET M4 grid by buffer Vlpwm, and FET M3 drain electrode is connected to field-effect
Pipe M4 drain electrode, FET M4 source ground, FET M4 drain electrode are grounded by inductance Lout and electric capacity Cout, electricity
In parallel with electric capacity Cout after resistance R1 and resistance R2 series connection, reference circuit, biasing circuit and temperature sense circuit are sequentially connected, temperature
The output end of sensor circuit is connected to BLE modules, and the data wire SDA and clock cable SCL of I2C interface circuit are connected to BLE
Module, FET M3 source electrode are connected to V/I sensor circuits, and V/I sensor circuits are connected to I2C by the double slope ADCs of 8-bit
Interface circuit, the output end of I2C interface circuit are connected to comparator CMP in-phase input end, error by frequency-adjustable circuit
Amplifier EA in-phase input end is connected to reference voltage, and error amplifier EA inverting input is connected to resistance R1 and resistance
Between R2, error amplifier EA output end is connected to comparator CMP inverting input, comparator CMP output end connection
To dead-time control circuit, effect pipe M3 source electrode is connected to low-dropout regulator.
Preferably, FET M1, FET M2, FET M3 and FET M4 are N-channel MOS FET.
Preferably, low-dropout regulator is powered for whole circuit.
The resonance wireless charging receiving circuit of the present invention integrates an AC-DC converter and dc-dc, prior
Including a protection circuit, power switch can be protected on startup；The alternating voltage received is converted into by AC-DC rectifiers
Fixed DC voltage, the DC voltage value are determined that the DC circuit passes through one again by the intensity of wireless energy transfer signal
Dc-dc is converted into the output voltage needed, and low pressure difference linear voltage regulator provides for system control module and communication module
Power supply, the power of receiving circuit by the double slope ADCs of 8-bit after the measurement of V/I sensor circuits by being converted into digital code, based on this
A little digital code information, BLE modules transfer information to transmitting terminal to control the power output of transmitting terminal；System is operated in
6.78MHz and coupled using resonance, system can use smaller inductance.Therefore compared with existing system, there is higher Shandong
Rod and more preferable spatial degrees of freedom.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of 6.78Mhz resonance wireless charging receiving circuit provided in an embodiment of the present invention；
Fig. 2 is the timing diagram of 6.78Mhz resonance wireless charging receiving circuit provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, a kind of 6.78Mhz resonance wireless charging receiving circuit, including diode D1, diode D2, field effect
Should pipe M1, FET M2, FET M3, FET M4, inductance Lout, electric capacity Cout, resistance R1, resistance R2, rectification
Control circuit, low-dropout regulator, protection circuit, buffer Vhpwm, buffer Vlpwm, level shifting circuit, V/I induced electricities
Road, dead-time control circuit, comparator CMP, the double slope ADCs of error amplifier EA, 8-bit, I2C interface circuit, frequency can
Adjust circuit, BLE modules, temperature sense circuit, biasing circuit and reference circuit, two voltage output ends point of rectifier control circuit
FET M1 grid and FET M2 grid are not connected to, and FET M1 drain electrode is connected to by diode D1
FET M3 source electrode, FET M2 drain electrode are connected to FET M3 source electrode, protection circuit by diode D2
It is connected to FET M3 source electrode, FET M1 source electrode and FET M2 source grounding, Power MOSFET
One output end of circuit is connected to FET M3 grid, dead time by level shifting circuit and buffer Vhpwm
Another output end of control circuit is connected to FET M4 grid, FET M3 drain electrode by buffer Vlpwm
FET M4 drain electrode, FET M4 source ground are connected to, FET M4 drain electrode passes through inductance Lout and electricity
Hold Cout ground connection, reference circuit, biasing circuit and temperature sense circuit in parallel with electric capacity Cout after resistance R1 and resistance R2 connect
It is sequentially connected, the output end of temperature sense circuit is connected to BLE modules, the data wire SDA and clock cable of I2C interface circuit
SCL is connected to BLE modules, and FET M3 source electrode is connected to V/I sensor circuits, and V/I sensor circuits pass through 8-bit diclinic rates
ADC is connected to I2C interface circuit, and the output end of I2C interface circuit is connected to comparator CMP same phase by frequency-adjustable circuit
Input, error amplifier EA in-phase input end are connected to reference voltage, and error amplifier EA inverting input is connected to
Between resistance R1 and resistance R2, error amplifier EA output end is connected to comparator CMP inverting input, comparator CMP
Output end be connected to dead-time control circuit, effect pipe M3 source electrode is connected to low-dropout regulator, wherein, FET
M1, FET M2, FET M3 and FET M4 are N-channel MOS FET, and low-dropout regulator supplies for whole circuit
Electricity.
As shown in Fig. 2 when 6.78MHz AC power is transferred to receiving terminal by resonant inductance, when the output end electricity of rectification
Appearance is electrically charged, and rectifier output voltage is gradually increasing.When operating voltage 7Vs, LDO of the rectifier output voltage VREC more than LDO start work
Make, control module and integrated I2C circuit power supply of the caused vdd voltage for internal system.For the safety of receiving circuit, directly
After to I2C electric circuit inspections to enable signal (even if control circuit is activated), dc-dc is started working.In one section of delay
After time, the enable signal of dc-dc is activated, and dc-dc starts slowly to export a stable direct current defeated
Go out voltage.
To sum up, the resonance wireless charging receiving circuit integrates an AC-DC converter and dc-dc, prior
Including a protection circuit, power switch can be protected on startup；The alternating voltage received is converted into by AC-DC rectifiers
Fixed DC voltage, the DC voltage value are determined that the DC circuit passes through one again by the intensity of wireless energy transfer signal
Dc-dc is converted into the output voltage needed, and low pressure difference linear voltage regulator provides for system control module and communication module
Power supply, the power of receiving circuit by the double slope ADCs of 8-bit after the measurement of V/I sensor circuits by being converted into digital code, based on this
A little digital code information, BLE modules transfer information to transmitting terminal to control the power output of transmitting terminal；System is operated in
6.78MHz and coupled using resonance, system can use smaller inductance.Therefore compared with existing system, there is higher Shandong
Rod and more preferable spatial degrees of freedom.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (3)
1. a kind of 6.78Mhz resonance wireless charging receiving circuit, it is characterised in that including diode D1, diode D2, field-effect
Pipe M1, FET M2, FET M3, FET M4, inductance Lout, electric capacity Cout, resistance R1, resistance R2, rectification control
Circuit processed, low-dropout regulator, protection circuit, buffer Vhpwm, buffer Vlpwm, level shifting circuit, V/I induced electricities
Road, dead-time control circuit, comparator CMP, the double slope ADCs of error amplifier EA, 8-bit, I2C interface circuit, frequency can
Adjust circuit, BLE modules, temperature sense circuit, biasing circuit and reference circuit, two voltage output ends point of rectifier control circuit
FET M1 grid and FET M2 grid are not connected to, and FET M1 drain electrode is connected to by diode D1
FET M3 source electrode, FET M2 drain electrode are connected to FET M3 source electrode, protection circuit by diode D2
It is connected to FET M3 source electrode, FET M1 source electrode and FET M2 source grounding, Power MOSFET
One output end of circuit is connected to FET M3 grid, dead time by level shifting circuit and buffer Vhpwm
Another output end of control circuit is connected to FET M4 grid, FET M3 drain electrode by buffer Vlpwm
FET M4 drain electrode, FET M4 source ground are connected to, FET M4 drain electrode passes through inductance Lout and electricity
Hold Cout ground connection, reference circuit, biasing circuit and temperature sense circuit in parallel with electric capacity Cout after resistance R1 and resistance R2 connect
It is sequentially connected, the output end of temperature sense circuit is connected to BLE modules, the data wire SDA and clock cable of I2C interface circuit
SCL is connected to BLE modules, and FET M3 source electrode is connected to V/I sensor circuits, and V/I sensor circuits pass through 8-bit diclinic rates
ADC is connected to I2C interface circuit, and the output end of I2C interface circuit is connected to comparator CMP same phase by frequency-adjustable circuit
Input, error amplifier EA in-phase input end are connected to reference voltage, and error amplifier EA inverting input is connected to
Between resistance R1 and resistance R2, error amplifier EA output end is connected to comparator CMP inverting input, comparator CMP
Output end be connected to dead-time control circuit, effect pipe M3 source electrode is connected to low-dropout regulator.
A kind of 2. 6.78Mhz resonance wireless charging receiving circuit as claimed in claim 1, it is characterised in that FET M1,
FET M2, FET M3 and FET M4 are N-channel MOS FET.
A kind of 3. 6.78Mhz resonance wireless charging receiving circuit as claimed in claim 1, it is characterised in that low voltage difference voltage stabilizing
Device is powered for whole circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710832256.2A CN107482795B (en) | 2017-09-15 | 2017-09-15 | 6.78Mhz resonance wireless charging receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710832256.2A CN107482795B (en) | 2017-09-15 | 2017-09-15 | 6.78Mhz resonance wireless charging receiving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107482795A true CN107482795A (en) | 2017-12-15 |
| CN107482795B CN107482795B (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710832256.2A Active CN107482795B (en) | 2017-09-15 | 2017-09-15 | 6.78Mhz resonance wireless charging receiving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302771A (en) * | 2018-10-23 | 2019-02-01 | 泉芯电子技术(深圳)有限公司 | LED constant current drive module |
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| CN106253410A (en) * | 2010-02-25 | 2016-12-21 | 高通股份有限公司 | Wireless power receptor |
| US20170187244A1 (en) * | 2015-12-23 | 2017-06-29 | Ningbo Weie Electronic Technology Co., Ltd. | Electrical energy receiving end capable of overvoltage protection and wireless electrical energy transmission device |
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2017
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Patent Citations (4)
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| CN106253410A (en) * | 2010-02-25 | 2016-12-21 | 高通股份有限公司 | Wireless power receptor |
| US20120286581A1 (en) * | 2011-05-12 | 2012-11-15 | Samsung Electronics Co., Ltd. | Apparatus and method for wireless power transmission |
| US20170187244A1 (en) * | 2015-12-23 | 2017-06-29 | Ningbo Weie Electronic Technology Co., Ltd. | Electrical energy receiving end capable of overvoltage protection and wireless electrical energy transmission device |
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Non-Patent Citations (2)
| Title |
|---|
| HYUNG-GU PARK ET AL: "A Design of a Wireless Power Receiving Unit With a High-Efficiency 6.78-MHz Active Rectifier Using Shared DLLs for Magnetic-Resonant A4 WP Applications", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302771A (en) * | 2018-10-23 | 2019-02-01 | 泉芯电子技术(深圳)有限公司 | LED constant current drive module |
| CN109302771B (en) * | 2018-10-23 | 2020-08-25 | 泉芯电子技术(深圳)有限公司 | LED constant current driving module |
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| Publication number | Publication date |
|---|---|
| CN107482795B (en) | 2020-04-07 |
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