CN207304171U - A kind of wireless charging circuit - Google Patents
A kind of wireless charging circuit Download PDFInfo
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- CN207304171U CN207304171U CN201720415498.7U CN201720415498U CN207304171U CN 207304171 U CN207304171 U CN 207304171U CN 201720415498 U CN201720415498 U CN 201720415498U CN 207304171 U CN207304171 U CN 207304171U
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Abstract
The utility model discloses a kind of wireless charging circuit, including power circuit, the power circuit is sequentially connected oscillating circuit, signal control circuit, signal amplification circuit, antiresonant circuit and charging receiving circuit, the signal control circuit includes the identical square-wave generator of two-way, the square-wave generator includes hysteresis loop comparator and RC charge-discharge circuit, and the hysteresis loop comparator includes operational amplifier, the 4th resistance R4, the 5th resistance R5, the 7th resistance R7 and the 4th zener diode Z4.Wireless charging circuit disclosed in the utility model, output frequency is relatively low, and easily by emc testing, circuit integrating degree is high, without debugging Key Circuit, greatly improves production efficiency.
Description
Technical field
Charging circuit field is the utility model is related to, more particularly to a kind of wireless charging circuit.
Background technology
Wireless charger starts to be applied to the charging of various low-power electrical appliances, but existing wireless charger requires charging
Equipment zero distance contacts, and charging current is smaller, while uses independent parts, and debugging is not easy, and wireless frequency is excessive,
Product is difficult to test by Electro Magnetic Compatibility (EMC).For above prior art defect, it is necessary to make improvements.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of wireless charging circuit, output frequency is relatively low, easily logical
Emc testing is crossed, circuit integrating degree is high, without debugging Key Circuit, greatly improves production efficiency.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：
A kind of wireless charging circuit, including power circuit, the power circuit are sequentially connected oscillating circuit, signal control electricity
Road, signal amplification circuit, antiresonant circuit and charging receiving circuit, the signal control circuit include the identical rectangle of two-way
Wave producer, the square-wave generator include hysteresis loop comparator and RC charge-discharge circuit, and the hysteresis loop comparator includes computing
Amplifier, the 4th resistance R4, the 5th resistance R5, the 7th resistance R7 and the 4th zener diode Z4, the operational amplifier it is same
Phase input terminal connects one end of the 4th resistance R4 and one end of the 5th resistance R5, the other end of the 4th resistance R4
Ground connection, the RC impulse electricities circuit include the 15th capacitance C15 and the 6th resistance R6 of one end ground connection, the 15th capacitance
The other end of C15 is connected with the inverting input of the operational amplifier and one end of the 6th resistance R6 respectively, the fortune
The output terminal for calculating amplifier is connected with one end of the 7th resistance R7, the other end of the 6th resistance R6 and the described 7th electricity
Hinder the other end connection of R7, the other end of the 5th resistance R5 respectively with the output terminal and the 4th zener diode Z4
One end connection, the other end ground connection of the 4th zener diode Z4, the 15th capacitance C15 and ground terminal form described
The input terminal of square-wave generator, the 4th zener diode Z4 form the output of the rectangle generator with the ground terminal
End, wherein the output terminal of the square-wave generator is connected with phase inverter all the way.
Preferably, the power circuit includes power interface, the output terminal of the power interface be connected with turn fuse,
First diode D1, the power circuit, the first capacitance C1 and the second capacitance C2, the first capacitance C1 and second capacitance
One end of C2 is all connected with the output terminal of the power interface, the other end is grounded.
Preferably, the signal amplification circuit includes signal amplification main control chip, and the signal amplification main control chip includes
Two paths of signals input terminal, signal output part, power input and ground terminal, the signal input part connect the rectangular wave and occur
The output terminal of device, the signal output part are parallel with the first filter capacitor group and the first winding, the first filter capacitor group bag
Include successively in parallel the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the 8th capacitance C8 and the 9th capacitance C9, described first
Winding parallel has the 13rd capacitance C13.
Preferably, the charging receiving circuit includes the second winding, the second filter circuit and power management in parallel successively
Chip, second filter circuit include the 14th capacitance C14, the 15th capacitance C15 and the 16th capacitance in parallel successively
C16。
Using above-mentioned technical proposal, circuit access 24V power supplys pass sequentially through power circuit, oscillating circuit, signal control
Circuit, by the two-way square-wave generator in signal control circuit, square-wave generator is by hysteresis loop comparator and RC discharge and recharges
Circuit forms, and 15th capacitance C15 is uncharged when initial, and the output terminal of hysteresis loop comparator is high level, as output voltage leads to
Cross the 6th resistance R6 to charge to the 15th capacitance C15, when the voltage at the 15th capacitance C15 both ends is more than the 4th resistance R4, the 5th
During the related magnitudes of voltage of resistance R5, the output terminal upset of hysteresis loop comparator, that is, export low level, low level maintains a period of time
Afterwards, the 15th capacitance C15 discharges, when the voltage at the 15th capacitance C15 both ends is related less than the 4th resistance R4, the 5th resistance R5
During value, the output terminal upset of hysteresis loop comparator, that is, export high level, wherein square-wave generator is connected with phase inverter all the way, it is defeated
Go out the frequency of 20.4K, the circuit of the frequency is integrated in same core easily by emc testing, two-way square-wave generator
In piece, circuit integrating degree is high, without debugging Key Circuit, greatly improves production efficiency.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of wireless charging circuit of the utility model；
Fig. 2 is a kind of signal control circuit figure of wireless charging circuit of the utility model.
In figure, 1- power circuits；2- oscillating circuits；3- signal control circuits；4- signal amplification circuits；5- parallel resonances electricity
Road；6- charging receiving circuits；7- square-wave generators；8- hysteresis loop comparators；9- the first filter capacitor groups；The second filtered electricals of 10-
Road.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.It should be noted that
It is used to help understand the utility model for the explanation of these embodiments, but does not form the restriction to the utility model.This
Outside, as long as technical characteristic involved in each embodiment of the utility model disclosed below does not form conflict each other
It can be mutually combined.
As shown in Figs. 1-2, a kind of wireless charging circuit disclosed in the utility model, including power circuit 1, power circuit 1
It is sequentially connected oscillating circuit 2, signal control circuit 3, signal amplification circuit 4, antiresonant circuit 5 and charging receiving circuit 6, letter
Number control circuit 3 includes the identical square-wave generator 7 of two-way, and square-wave generator 7 includes hysteresis loop comparator 8 and RC discharge and recharges
Circuit, hysteresis loop comparator 8 include operational amplifier U1, the 4th resistance R4, the 5th resistance R5, the 7th resistance R7 and the 4th voltage stabilizing two
The in-phase input end of pole pipe Z4, operational amplifier U1 connect one end of the 4th resistance R4 and one end of the 5th resistance R5, the 4th electricity
The other end ground connection of R4 is hindered, RC impulse electricities circuit includes the 15th capacitance C15 and the 6th resistance R6 of one end ground connection, the 15th electricity
The other end for holding C15 is connected with the inverting input of operational amplifier and one end of the 6th resistance R6 respectively, operational amplifier
Output terminal is connected with one end of the 7th resistance R7, and the other end of the 6th resistance R6 is connected with the other end of the 7th resistance R7, and the 5th
The one end of the other end of resistance R5 respectively with output terminal and the 4th zener diode Z4 is connected, and the 4th zener diode Z4's is another
End ground connection, the 15th capacitance C15 form the input terminal of square-wave generator, the 4th zener diode Z4 and ground terminal with ground terminal
The output terminal of rectangle generator is formed, wherein the output terminal of square-wave generator is connected with phase inverter U2 all the way.Circuit accesses 24V
Power supply passes sequentially through power circuit 1, oscillating circuit 2, signal control circuit 3, passes through the two-way rectangular wave in signal control circuit
Generator 7, square-wave generator 7 are made of hysteresis loop comparator 8 and RC charge-discharge circuit, and 15th capacitance C15 does not fill when initial
Electricity, the output terminal of hysteresis loop comparator 8 is high level, as output voltage is charged by the 6th resistance R6 to the 15th capacitance C15,
When the voltage at the 15th capacitance C15 both ends is more than the related magnitude of voltage of the 4th resistance R4, the 5th resistance R5, hysteresis loop comparator
Output terminal is overturn, that is, exports low level, after low level maintains a period of time, the 15th capacitance C15 electric discharges, when the 15th capacitance
When the voltage at C15 both ends is less than the 4th resistance R4, the 5th resistance R5 related value, the output terminal upset of hysteresis loop comparator is that is, defeated
Go out high level, wherein square-wave generator is connected with phase inverter all the way, export the frequency of 20.4K, the circuit of the frequency easily leads to
Emc testing is crossed, two-way square-wave generator is integrated in same chip, and circuit integrating degree is high, is closed without debugging
Key circuit, greatly improves production efficiency.
Specifically, power circuit 1 includes power interface CON1, and the output terminal of power interface CON1 is connected with fuse in turn
F1, the first diode D1, power circuit 1, one end of the first capacitance C1 and the second capacitance C2, the first capacitance C1 and the second capacitance C2
Output terminal, the other end for being all connected with the power interface CON1 are grounded.Being connected with the power interface CON1 of fuse F1 prevents
Electric current is excessive to burn out whole circuit.Signal amplification circuit 4 includes signal amplification main control chip U3, signal amplification main control chip U3 bags
Two paths of signals input terminal, signal output part, power input and ground terminal are included, signal input part connects the defeated of square-wave generator
Outlet, signal output part are parallel with the first filter capacitor group 9 and the first winding L1, and the first filter capacitor group 9 includes in parallel successively
The 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the 8th capacitance C8 and the 9th capacitance C9, first winding parallel has
13rd capacitance C13.The receiving circuit 6 that charges includes the second winding L2, the second filter circuit 10 and power management in parallel successively
Chip U4, the second filter circuit 10 include the 14th capacitance C14, the 15th capacitance C15 and the 16th capacitance in parallel successively
C16.Model TP4056 can be selected in power management chip U4, as a result of internal PMOSFET frameworks, plus anti-down charging
Road, so need not exterior isolating diode.Thermal feedback can automatically adjust charging current, so as in high-power operation or
Chip temperature is any limitation as under the conditions of high environment temperature.
The embodiment of the utility model is explained in detail above in association with attached drawing, but the utility model is not limited to be retouched
The embodiment stated.For a person skilled in the art, it is right in the case where not departing from the utility model principle and spirit
These embodiments carry out a variety of change, modification, replacement and modification, still fall within the scope of protection of the utility model.
Claims (4)
1. a kind of wireless charging circuit, including power circuit, it is characterised in that：The power circuit be sequentially connected oscillating circuit,
Signal control circuit, signal amplification circuit, antiresonant circuit and charging receiving circuit, the signal control circuit include two-way
Identical square-wave generator, the square-wave generator include hysteresis loop comparator and RC charge-discharge circuit, and the hysteresis compares
Device includes operational amplifier, the 4th resistance R4, the 5th resistance R5, the 7th resistance R7 and the 4th zener diode Z4, the computing
The in-phase input end of amplifier connects one end of the 4th resistance R4 and one end of the 5th resistance R5, the 4th resistance
The other end ground connection of R4, the RC impulse electricities circuit include the 15th capacitance C15 and the 6th resistance R6 of one end ground connection, and described the
The other end of 15 capacitance C15 connects with the inverting input of the operational amplifier and one end of the 6th resistance R6 respectively
Connect, the output terminal of the operational amplifier is connected with one end of the 7th resistance R7, the other end of the 6th resistance R6 with
The other end connection of the 7th resistance R7, the other end of the 5th resistance R5 respectively with the output terminal and described 4th steady
Press one end connection of diode Z4, the other end ground connection of the 4th zener diode Z4, the 15th capacitance C15 and ground connection
End forms the input terminal of the square-wave generator, and the 4th zener diode Z4 forms the rectangle with the ground terminal and sends out
The output terminal of raw device, wherein the output terminal of the square-wave generator is connected with phase inverter all the way.
2. wireless charging circuit according to claim 1, it is characterised in that：The power circuit includes power interface, institute
The output terminal for stating power interface is connected with fuse, the first diode D1, the power circuit, the first capacitance C1 and second in turn
One end of capacitance C2, the first capacitance C1 and the second capacitance C2 are all connected with the output terminal of the power interface, the other end
It is grounded.
3. wireless charging circuit according to claim 1, it is characterised in that：The signal amplification circuit amplifies including signal
Main control chip, the signal amplification main control chip include two paths of signals input terminal, signal output part, power input and ground connection
End, the signal input part connect the output terminal of the square-wave generator, and the signal output part is parallel with the first filtered electrical
Appearance group and the first winding, the first filter capacitor group include the 5th capacitance C5 in parallel successively, the 6th capacitance C6, the 7th capacitance
C7, the 8th capacitance C8 and the 9th capacitance C9, first winding parallel have the 13rd capacitance C13.
4. wireless charging circuit according to claim 1, it is characterised in that：The charging receiving circuit includes in parallel successively
The second winding, the second filter circuit and power management chip, second filter circuit includes the 14th electricity in parallel successively
Hold C14, the 15th capacitance C15 and the 16th capacitance C16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415498.7U CN207304171U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415498.7U CN207304171U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304171U true CN207304171U (en) | 2018-05-01 |
Family
ID=62271493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720415498.7U Expired - Fee Related CN207304171U (en) | 2017-04-19 | 2017-04-19 | A kind of wireless charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207304171U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
| CN114336903A (en) * | 2022-03-16 | 2022-04-12 | 安翰科技(武汉)股份有限公司 | Charging circuit, charging device and capsule endoscope charging system |
| CN114401029A (en) * | 2022-01-07 | 2022-04-26 | 青岛鼎信通讯股份有限公司 | High-power carrier signal transmitting circuit |
-
2017
- 2017-04-19 CN CN201720415498.7U patent/CN207304171U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114401029A (en) * | 2022-01-07 | 2022-04-26 | 青岛鼎信通讯股份有限公司 | High-power carrier signal transmitting circuit |
| CN114401029B (en) * | 2022-01-07 | 2024-03-19 | 青岛鼎信通讯股份有限公司 | High-power carrier signal transmitting circuit |
| CN114337211A (en) * | 2022-03-08 | 2022-04-12 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
| CN114337211B (en) * | 2022-03-08 | 2022-06-24 | 深圳英集芯科技股份有限公司 | Critical value oscillation control device, equipment and wireless earphone |
| CN114336903A (en) * | 2022-03-16 | 2022-04-12 | 安翰科技(武汉)股份有限公司 | Charging circuit, charging device and capsule endoscope charging system |
| CN114336903B (en) * | 2022-03-16 | 2022-06-21 | 安翰科技(武汉)股份有限公司 | Charging circuit, charging device and capsule endoscope charging system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20210419 |