CN209282940U - Wireless charging transmitting chip - Google Patents
Wireless charging transmitting chip Download PDFInfo
- Publication number
- CN209282940U CN209282940U CN201920265858.9U CN201920265858U CN209282940U CN 209282940 U CN209282940 U CN 209282940U CN 201920265858 U CN201920265858 U CN 201920265858U CN 209282940 U CN209282940 U CN 209282940U
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- Prior art keywords
- module
- oxide
- shaping filter
- wireless charging
- metal
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- 238000007493 shaping process Methods 0.000 claims abstract description 33
- 230000010355 oscillation Effects 0.000 claims abstract description 32
- 239000004065 semiconductor Substances 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of wireless charging transmitting chip, comprising: oscillation module, for generating oscillator signal；The shaping filter module connecting with the oscillation module, the oscillator signal shaping filter for generating the oscillation module are the waveform of single-frequency；The waveform of the pwm signal processing module connecting with the shaping filter module, the single-frequency for exporting the shaping filter module is converted into the identical square-wave signal of frequency；The metal-oxide-semiconductor module connecting with the pwm signal processing module, the metal-oxide-semiconductor module are also connect with an inductance coil, and the square-wave signal for being converted according to the pwm signal processing module controls the charge or discharge of the inductance coil.The utility model reduces the shaping circuit of MCU chip and chip periphery, considerably reduces the electronic device of peripheral circuit by integrated oscillation module and metal-oxide-semiconductor module, simplifies circuit design, reduces production cost.
Description
Technical field
The utility model relates to technical field of integrated circuits more particularly to a kind of wireless charging transmitting chips.
Background technique
With the fast development of science and technology and social economy, people more and more frequently use each class of electronic devices, such as
The portable electronic devices such as mobile phone, mp3 and tablet computer, bring great convenience to people's lives.And electronic equipment exists
When charging, require to connect charger progress wired charging by charging power cord, this charging modes are big by site influence, make
It is poor with experiencing；Therefore, the wireless charging device based on electromagnetic induction principle comes into being.
Currently, the wireless charging device overwhelming majority, along with peripheral plastic filter circuit, is made using MCU as main control chip
Coil generates AC signal, realizes the transmission of energy.But the miniaturized electronics other than mobile phone, such as electric toothbrush,
Because its is small in size, this requires the chip performance built in product is stable and the peripheral circuit simplification of chip connection.It is existing
For wireless charging scheme because needing skilled addressee to the exploitation of MCU chip using MCU as main control chip, development cost is higher, and
And MCU chip also needs to connect a series of peripheral circuit, will increase the area of PCB circuit board accordingly, further increases product
Production cost, production is at high cost.
Therefore, the prior art is defective, needs to improve.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of wireless charging transmitting chip.
The technical solution of the utility model is as follows: a kind of wireless charging transmitting chip, comprising: oscillation module, shaping filter
Module, pwm signal processing module and metal-oxide-semiconductor module；
The oscillation module includes oscillator and peripheral oscillating circuit, for generating oscillator signal；
The shaping filter module connects the oscillation module, the oscillator signal shaping for generating the oscillation module
It is filtered into the waveform of single-frequency；
The pwm signal processing module connects the shaping filter module, for export the shaping filter module
The waveform of single-frequency is converted into the identical square-wave signal of frequency；
The metal-oxide-semiconductor module connects the pwm signal processing module, and the metal-oxide-semiconductor module is also connected with an inductance coil, uses
The charge or discharge of the inductance coil are controlled in the square-wave signal converted according to the pwm signal processing module.
Further, the wireless charging transmitting chip further include:
Chip energization pins are connect with the oscillation module, for voltage needed for providing work to the oscillation module；
Reference pin is adjusted, is connect with offset signal adjustment circuit；
Charge and discharge control pin is connect, for controlling filling for inductance coil respectively with the metal-oxide-semiconductor module and inductance coil
Electricity or electric discharge.
Further, the shaping filter module includes schmidt shaping circuit.
Further, the pwm signal processing module includes that circuit occurs for PWM；It includes PWM hair that circuit, which occurs, for the PWM
Raw device.
Further, the metal-oxide-semiconductor module includes NMOS tube.
Using the above scheme, the utility model has the following beneficial effects:
1, the utility model in terms of existing technologies, is integrated with oscillation module and metal-oxide-semiconductor module, reduces MCU core
The shaping circuit of piece and chip periphery considerably reduces the electronic device of peripheral circuit, simplifies circuit design, reduces production
Cost.
2, frequency of the utility model only by adusting resistance and the i.e. changeable oscillator signal of capacitor in chip periphery circuit
The convenience of rate, the exploitation of wireless charging transmitting chip is high.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the schematic diagram of the utility model wireless charging transmitting chip；
Fig. 2 is the application circuit of the utility model wireless charging transmitting chip；
Fig. 3 is the structural block diagram of the utility model wireless charging transmitting chip.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Referring to figs. 1 to shown in Fig. 3, the utility model provides a kind of wireless charging transmitting chip.The utility model includes:
Oscillation module 1, shaping filter module 2, pwm signal processing module 3 and metal-oxide-semiconductor module 4；
The oscillation module 1 includes oscillator and peripheral oscillating circuit, for generating oscillator signal；
The shaping filter module 2 connects the oscillation module 1, the oscillator signal for generating the oscillation module 1
Shaping filter is the waveform of single-frequency；
The pwm signal processing module 3 connects the shaping filter module 2, for exporting the shaping filter module 2
The waveform of single-frequency be converted into the identical square-wave signal of frequency；
The metal-oxide-semiconductor module 4 connects the pwm signal processing module 3, and the metal-oxide-semiconductor module 4 is also connected with an inductance coil
5, the square-wave signal for being converted according to the pwm signal processing module 3 controls the charge or discharge of the inductance coil 5.
Wherein, the oscillation module 1 is capacitor charging in peripheral oscillating circuit by constant-current source, and capacitor charging or is put
Electricity has time-delay characteristics, and the capacitor charge and discharge in peripheral oscillating circuit generates oscillator signal, and oscillation letter is transferred to shaping filter
Wave module 2；The shaping filter module 2 is built-in with resistance and capacitor, and the oscillator signal that oscillation module 1 transmits passes through the shaping
The oscillator signal of single-frequency is exported after resistance and capacitor filtering built in filter module 2, and filtered oscillator signal is passed
It is defeated by pwm signal processing module 3；The single-frequency that the pwm signal processing module 3 exports the shaping filter module 2
It is VDD, the square-wave signal that duty ratio is 50% that oscillator signal, which is converted into amplitude,；Described in the grid connection of the metal-oxide-semiconductor module 4
The output end of pwm signal processing module 3, one end of the drain electrode connection inductance coil 5 of the metal-oxide-semiconductor module 4, the MOS
The conducting for square-wave signal control itself grid of metal-oxide-semiconductor module 4 that tube module 4 is exported according to the pwm signal processing module 3 is cut
Only, it realizes the charge and discharge control to inductance coil 5, and the oscillation of inductance coil 5 is caused to form AC signal, realize the biography of energy
It is defeated.
As one embodiment, the wireless charging transmitting chip further include:
Chip energization pins are connect with the oscillation module 1, for electricity needed for providing work to the oscillation module 1
Pressure；
Reference pin is adjusted, is connect with offset signal adjustment circuit；
Charge and discharge control pin is connect, for controlling inductance coil 5 respectively with the metal-oxide-semiconductor module 4 and inductance coil 5
Charge or discharge.
As one embodiment, the shaping filter module 2 includes schmidt shaping circuit.
As one embodiment, the pwm signal processing module 3 includes that circuit occurs for PWM；Circuit packet occurs for the PWM
Include PWM generator.
As one embodiment, the metal-oxide-semiconductor module 4 includes enhanced NMOS tube.
Utility model works principle:
As shown in Fig. 2, resistance R1 is as the resistance of adjustment offset signal, resistance R2 and capacitor C2 are delayed for doing
Resistance and capacitor, coil L1 are the inductance coils 5 for being used for transmission energy, and coil L1 is in parallel with capacitor C3, are generated for coil L1
Oscillator signal filtering.
After chip powers on, chip carries out charge and discharge to resistance R2 and capacitor C2, because of the time-delay characteristic of resistance R2 and capacitor C2
Property, oscillation module 1 generates stable oscillator signal, and portion by shaping filter module 2 is filtered into list to the oscillator signal in the chip
The oscillator signal of one frequency, then the square-wave signal that duty ratio is 50%, metal-oxide-semiconductor module 4 are converted to by pwm signal processing module 3
The on or off that itself grid is controlled according to the square-wave signal that pwm signal processing module 3 exports, when the grid of metal-oxide-semiconductor module 4
When conducting, coil L1 carries out discharge process, and when the cut-off of the grid of metal-oxide-semiconductor module 4, coil L1 carries out charging process, coil L1
Repeat charge and discharge, self-oscillation generates AC signal, realizes the transmission of energy；And by adjusting resistance R2's and capacitor C2
The adjustable different frequency of oscillation of capacitance resistance value selects resistance R2 and capacitor C2 to realize the stable output of coil according to coil
Oscillator signal achievees the purpose that stablize transmission energy.
Calculating according to resistance R2 and capacitor C2 adjustment frequency of oscillation is as follows: the voltage of chip pin IN2 is labeled as U1, core
The voltage of piece pin IN3 is labeled as U2, and the voltage at the both ends capacitor C2 is Uc, supply voltage Vdd, when input voltage is equal to power supply
Voltage 1/2 when, output level curve is transferred, and therefore, during the charging process, the voltage Uc at the both ends capacitor C2 is from -1/
2Vdd becomes 1/2Vdd, and during discharge, the voltage Uc at the both ends capacitor C2 becomes -1/2Vdd from 1/2Vdd.Due to charging
Process and discharge process are the same circuits, so charging time t1 is equal to discharge time t2.The electric current for flowing through capacitor C2 is labeled as
Ic then has:
Uc=1/C ∫ icdt
That is: R2C2dUc/dt+Uc=U1-U2
Therefore, Uc (t)=(U1-U2)+C*e-t/ R2C2 (C is constant)
During the charging process, the initial value of Uc (t) is -1/2Vdd, final value 1/2Vdd, by the initial value of Uc (t) and final value band
Enter Uc (t)=(U1-U2)+C*e-tIn/R2C2, t=t1=R2C2ln3 is obtained；Therefore, cycle T=t1+t2=2R2C2ln3
Therefore frequency of oscillation f=1/2R2C2ln3
Compared with prior art, the utility model has the following beneficial effects:
1, the utility model in terms of existing technologies, is integrated with oscillation module and metal-oxide-semiconductor module, reduces MCU core
The shaping circuit of piece and chip periphery considerably reduces the electronic device of peripheral circuit, simplifies circuit design, reduces production
Cost.
2, frequency of the utility model only by adusting resistance and the i.e. changeable oscillator signal of capacitor in chip periphery circuit
The convenience of rate, the exploitation of wireless charging transmitting chip is high.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.
Claims (5)
1. a kind of wireless charging transmitting chip characterized by comprising oscillation module, shaping filter module, pwm signal processing
Module and metal-oxide-semiconductor module；
The oscillation module includes oscillator and peripheral oscillating circuit, for generating oscillator signal；
The shaping filter module connects the oscillation module, the oscillator signal shaping filter for generating the oscillation module
For the waveform of single-frequency；
The pwm signal processing module connects the shaping filter module, single for exporting the shaping filter module
The waveform of frequency is converted into the identical square-wave signal of frequency；
The metal-oxide-semiconductor module connects the pwm signal processing module, and the metal-oxide-semiconductor module is also connected with an inductance coil, is used for root
The charge or discharge of the inductance coil are controlled according to the square-wave signal that the pwm signal processing module is converted.
2. wireless charging transmitting chip according to claim 1, which is characterized in that the wireless charging transmitting chip also wraps
It includes:
Chip energization pins are connect with the oscillation module, for voltage needed for providing work to the oscillation module；
Reference pin is adjusted, is connect with offset signal adjustment circuit, for acquiring the offset signal adjustment circuit；
Charge and discharge control pin is connect with the metal-oxide-semiconductor module and inductance coil respectively, for control inductance coil charging or
Electric discharge.
3. wireless charging transmitting chip according to claim 1, which is characterized in that the shaping filter module is close including applying
Special shaping circuit.
4. wireless charging transmitting chip according to claim 1, which is characterized in that the pwm signal processing module includes
Circuit occurs for PWM；It includes PWM generator that circuit, which occurs, for the PWM.
5. wireless charging transmitting chip according to claim 1, which is characterized in that the metal-oxide-semiconductor module includes NMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265858.9U CN209282940U (en) | 2019-03-01 | 2019-03-01 | Wireless charging transmitting chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265858.9U CN209282940U (en) | 2019-03-01 | 2019-03-01 | Wireless charging transmitting chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282940U true CN209282940U (en) | 2019-08-20 |
Family
ID=67606166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920265858.9U Expired - Fee Related CN209282940U (en) | 2019-03-01 | 2019-03-01 | Wireless charging transmitting chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209282940U (en) |
-
2019
- 2019-03-01 CN CN201920265858.9U patent/CN209282940U/en not_active Expired - Fee Related
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Legal Events
| 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: 20190820 |