CN208571660U - Wireless charging circuit - Google Patents
Wireless charging circuit Download PDFInfo
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- CN208571660U CN208571660U CN201821176654.XU CN201821176654U CN208571660U CN 208571660 U CN208571660 U CN 208571660U CN 201821176654 U CN201821176654 U CN 201821176654U CN 208571660 U CN208571660 U CN 208571660U
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Abstract
It include wireless charging module the utility model relates to a kind of wireless charging circuit, the wireless charging module includes transmitting terminal and receiving end, and the receiving end and transmitting terminal are coupled by magneticaction；It is characterized by also including same phase buck-boost circuit and with the battery with phase buck-boost circuit connection；The same phase buck-boost circuit is connect with receiving end.By being arranged in wireless charging circuit with phase buck-boost circuit, the same phase buck-boost circuit is connect the utility model with receiving end.Enable wireless charging circuit in the case where transmitting terminal and low receiving end degree of coupling, receiving end rectification side voltage can still charge the battery, that is, realize efficient wide-voltage range charging.
Description
Technical field
The utility model relates to wireless charging technical fields, and in particular to a kind of wireless charging circuit.
Background technique
Wireless charging is either based on electromagnetic induction or magnetic resonance, and general there are two types of power supply or input modes, first is that
Adapter exports direct current and via normal transmission line is supplied to wireless charging module, another be then adapter output direct current via
Wireless charging control circuit is converted into the AC signal for meeting target, drives transmitting coil by specific AC transmission line.
In recent years, wireless charging technology is widely used in consumer electronics product, electric vehicle, biomedical instrument etc.
Field.Present its superiority relative to traditional wire charging.In a typical electronic equipment lithium battery wireless charging electricity
Lu Zhong, other than prime transmitting coil (exchanges)-DC (direct current)-AC (direct current)-DC (direct current) with the AC of receiving coil, there are also one
The supply convertor of grade connection battery and receiving coil rectification side.Traditionally, this level-one is by LDO (low dropout
Regulator is a kind of low pressure difference linear voltage regulator) or Buck (Buck conversion circuit) circuit realize, and its input electricity
Pressure cannot be below lithium battery voltage.
LDO charges to lithium battery as wireless charging rear class, and low efficiency, fever is serious when high-power charging；Buck circuit
It can only be depressured, when transmitting coil and low receiving coil degree of coupling, too low rectification side voltage can not pass through Buck circuit pair
Lithium battery charging.Therefore, wireless charging circuit in the prior art can not achieve efficient wide-voltage range charging
Utility model content
To solve the problems, such as can not achieve efficient wide-voltage range charging, the purpose of this utility model is to provide one kind to fill
The high adapter of electrical efficiency and the wireless charging device comprising the adapter.
A kind of wireless charging circuit, including wireless charging module, the wireless charging module include transmitting terminal and receiving end,
The receiving end and transmitting terminal are coupled by magneticaction；Further include same phase buck-boost circuit and with this with phase buck-boost
The battery of circuit connection；The same phase buck-boost circuit is connect with receiving end.
Preferably；The same phase buck-boost circuit is the circuit for having the function of boosting and being depressured, this is the same as mutually decompression-
Booster circuit is the buck-boost circuit with synchronous rectification.
Preferably；The same phase buck-boost circuit is the circuit for having the function of boosting and being depressured, this is the same as mutually decompression-
Booster circuit is the buck-boost circuit without synchronous rectification.
Preferably；The same phase buck-boost circuit is applied to the rectification side of receiving end.
Preferably；The same phase buck-boost circuit is applied in battery converter.
Preferably；The same phase buck-boost circuit includes the first circuit, second circuit and inductance；First circuit
It is connect with second circuit；The inductance is all connected with the first circuit and second circuit.
Preferably；First circuit includes first diode, the second diode, the first metal-oxide-semiconductor and first capacitor；It is described
First metal-oxide-semiconductor and first diode compose in parallel the first parallel circuit；Second diode and the first parallel circuit in series group
At the first series circuit；The first capacitor is in parallel with the first series circuit；The inductance and the first parallel circuit and the two or two
Pole pipe is all connected with.
Preferably；First circuit further includes the second metal-oxide-semiconductor；Second metal-oxide-semiconductor and the second diodes in parallel.
Preferably；The second circuit includes third diode, the 4th diode, the 4th metal-oxide-semiconductor, the second capacitor and electricity
Resistance；4th diode and the 4th metal-oxide-semiconductor compose in parallel the second parallel circuit；The third diode is in parallel with described second
Circuit is composed in series the second series circuit；Second series circuit, the second capacitor and resistor coupled in parallel；The inductance and second is simultaneously
Connection circuit and third diode are all connected with.
Preferably；The second circuit further includes third metal-oxide-semiconductor；The third metal-oxide-semiconductor and third diodes in parallel.
The utility model has the beneficial effects that
Compared with prior art, the utility model in wireless charging circuit by being arranged with phase buck-boost circuit, institute
Same phase buck-boost circuit is stated to connect with receiving end.The same phase buck-boost circuit is to have the function of boosting and be depressured
Circuit, so it is in the case where transmitting terminal and low receiving end degree of coupling, so that the lower voltage of receiving end rectification side is still
It can charge the battery, that is, realize efficient wide-voltage range charging.
Detailed description of the invention
Fig. 1 is a kind of wireless charging circuit schematic diagram in the utility model；
Fig. 2 (a) and Fig. 2 (b) is respectively in the utility model with phase buck-boost circuit diagram；
Fig. 3 is a kind of preferred embodiment schematic diagram of wireless charging circuit in the utility model.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model:
Referring to Fig.1, Fig. 2 and Fig. 3 provides the utility model in the embodiments of the present invention and also provides a kind of wireless charging
Circuit, the wireless charging circuit include wireless charging module 1.The wireless charging module 1 include transmitting terminal 11, receiving end 12,
With phase buck-boost circuit 13 and with the battery 14 being connect with phase buck-boost circuit 13.The transmitting terminal 11 and receiving end
12 are coupled by magneticaction.The same phase buck-boost circuit 13 is connect with receiving end.The transmitting terminal 11 includes first whole
Current circuit 111 and the receiving coil 112 being connect with the first rectification circuit 111.First rectification circuit 111 can be whole for DC-AC
Current circuit.The receiving end 12 includes the second rectification circuit 121 and transmitting coil 122, and second rectification circuit 121 can be
DC-AC rectification circuit.The receiving coil 112 is coupled with transmitting coil 122 by magneticaction.The same phase buck-boost
Circuit 13 can be applied to the rectification side of receiving end 12, perhaps applied to being applied to connect in the converter of battery 14 or simultaneously
In the rectification side of receiving end and the converter of battery 14.
Preferably, the same phase buck-boost circuit 13 is the circuit for having the function of boosting and being depressured.Example
Such as, the same phase buck-boost circuit 13 can be for the same as phase Buck-Boost circuit.This with phase Buck-Boost be Buck topology and
The function of boosting and decompression can be achieved in the mixing of Boost topology.This is the same as the drop that phase buck-boost circuit 13 is without synchronous rectification
Pressure-booster circuit；Or this is the buck-boost circuit with synchronous rectification with phase buck-boost circuit 13；Or the same phase
Buck-boost circuit 13 simultaneously includes without the buck-boost circuit of synchronous rectification and the buck-boost with synchronous rectification is electric
Road, can be arranged switching switch between two different modes at this time or switching circuit is realized and switched accordingly according to different needs
The buck-boost circuit of mode.Specific scheme can design according to actual needs.
The same phase buck-boost circuit 13 includes the first circuit 131, second circuit 132 and inductance L.First electricity
Road 131 is connect with second circuit 132.The inductance L is all connected with the first circuit 131 and second circuit 132.First circuit
131 include first diode D1, the second diode D2, the first metal-oxide-semiconductor Q1 (Metal Oxide Semiconductor, metal-
Oxide-Semiconductor Field effect transistor) and first capacitor C1.The first diode D1 is composed in parallel with the first metal-oxide-semiconductor Q1
First parallel circuit.The second diode D2 and the first parallel circuit in series form the first series circuit.The first capacitor
C1 is in parallel with the first series circuit；The inductance L is all connected with the first parallel circuit and the second diode.The first capacitor C1
For smooth busbar voltage, such as the first capacitor can be bus decoupling capacitance.
The second circuit 132 include third diode D3, the 4th diode D4, the 4th metal-oxide-semiconductor Q4, the second capacitor C2 and
Resistance RL.The 4th diode D4 and the 4th metal-oxide-semiconductor Q4 composes in parallel the second parallel circuit.The third diode D3 and institute
It states the second parallel circuit in series and forms the second series circuit.Second series circuit, the second capacitor C2 and resistance RLIt is in parallel.Institute
Inductance L is stated to be all connected with the second parallel circuit and third diode D3.Same phase buck-boost circuit can also described in this implementation
To be applied to rear class DC-DC topological structure.Small with phase Buck-Boost switching device voltage stress, inductive current stress can pass through
Optimization in control, can also big degree reduction.
As another better embodiment, realize that transfer efficiency is optimal or delivering power is maximum；Reference Fig. 2 (b) and Fig. 3,
Based on embodiment of above, first circuit 131 can also include the second metal-oxide-semiconductor Q2.The second metal-oxide-semiconductor Q2 and the two or two
Pole pipe D2 is in parallel.The second circuit 132 can also include third metal-oxide-semiconductor Q3.The third metal-oxide-semiconductor Q3 and third diode D3
It is in parallel.Same phase buck-boost circuit described in this implementation can be there are two types of operating mode.The first is conventional operating mode,
Wireless universal charging circuit and work is independently run with phase Buck-Boost circuit.Second be optimum efficiency (most
It is high-power) tracing mode, i.e., charged by control with the input equivalent resistance and prime wireless universal of phase Buck-Boost circuit
Circuit parameter matches, and realizes that transfer efficiency is optimal or delivering power is maximum.DCDC equivalent inpnt resistance is widened to be able to achieve
Range realizes wide scope and optimum efficiency tracking.
As preferred embodiment, the diode of metal-oxide-semiconductor described in above each embodiment and its parallel connection can be metal-oxide-semiconductor
Included parasitic body diode.Such as: each diode and corresponding metal-oxide-semiconductor can be integrated into an element together.It is specific:
First metal-oxide-semiconductor Q1 and first diode D1 can be an integrated element, and the second metal-oxide-semiconductor Q2 and the second diode D2 can be one
Integrated element, third metal-oxide-semiconductor Q3 and third diode D3 can be an integrated element, the 4th metal-oxide-semiconductor Q4 and the four or two pole
Pipe D4 can be an integrated element.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims
Within the scope of.
It should be understood that embodiment described above is only the section Example of the utility model, rather than all
Embodiment.Embodiment and the "an" of singular used in the attached claims, " described " and "the" are also intended to
Including most forms, unless the context clearly indicates other meaning.
Claims (10)
1. a kind of wireless charging circuit, including wireless charging module, the wireless charging module includes transmitting terminal and receiving end, institute
Receiving end and transmitting terminal is stated to couple by magneticaction；It is characterized by also including same phase buck-boost circuit and with the same phase
The battery of buck-boost circuit connection；The same phase buck-boost circuit is connect with receiving end.
2. wireless charging circuit according to claim 1, it is characterised in that: the same phase buck-boost circuit be with
The circuit of the function of boosting and decompression, this is the buck-boost circuit with synchronous rectification with phase buck-boost circuit.
3. wireless charging circuit according to claim 1, it is characterised in that: the same phase buck-boost circuit be with
The circuit of the function of boosting and decompression, this is the same as the buck-boost circuit that phase buck-boost circuit is without synchronous rectification.
4. wireless charging circuit according to claim 1, it is characterised in that: the same phase buck-boost circuit is applied to
The rectification side of receiving end.
5. wireless charging circuit according to claim 1-4, it is characterised in that: the same phase buck-boost electricity
Road is applied in battery converter.
6. wireless charging circuit according to claim 5, it is characterised in that: the same phase buck-boost circuit includes the
One circuit, second circuit and inductance；First circuit is connect with second circuit；The inductance and the first circuit and second circuit
It is all connected with.
7. wireless charging circuit according to claim 6, it is characterised in that: first circuit include first diode,
Second diode, the first metal-oxide-semiconductor and first capacitor；First metal-oxide-semiconductor and first diode compose in parallel the first parallel circuit；
Second diode and the first parallel circuit in series form the first series circuit；The first capacitor and the first series circuit are simultaneously
Connection；The inductance is all connected with the first parallel circuit and the second diode.
8. wireless charging circuit according to claim 7, it is characterised in that: first circuit further includes the second metal-oxide-semiconductor；
Second metal-oxide-semiconductor and the second diodes in parallel.
9. wireless charging circuit according to claim 6, it is characterised in that: the second circuit include third diode,
4th diode, the 4th metal-oxide-semiconductor, the second capacitor and resistance；It is in parallel that 4th diode with the 4th metal-oxide-semiconductor composes in parallel second
Circuit；The third diode and second parallel circuit in series form the second series circuit；Second series circuit,
Two capacitors and resistor coupled in parallel；The inductance is all connected with the second parallel circuit and third diode.
10. wireless charging circuit according to claim 9, it is characterised in that: the second circuit further includes the 3rd MOS
Pipe；The third metal-oxide-semiconductor and third diodes in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821176654.XU CN208571660U (en) | 2018-07-24 | 2018-07-24 | Wireless charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821176654.XU CN208571660U (en) | 2018-07-24 | 2018-07-24 | Wireless charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208571660U true CN208571660U (en) | 2019-03-01 |
Family
ID=65447758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821176654.XU Active CN208571660U (en) | 2018-07-24 | 2018-07-24 | Wireless charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208571660U (en) |
-
2018
- 2018-07-24 CN CN201821176654.XU patent/CN208571660U/en active Active
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