CN205829205U - A kind of USB wireless charging device - Google Patents
A kind of USB wireless charging device Download PDFInfo
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- CN205829205U CN205829205U CN201620450766.4U CN201620450766U CN205829205U CN 205829205 U CN205829205 U CN 205829205U CN 201620450766 U CN201620450766 U CN 201620450766U CN 205829205 U CN205829205 U CN 205829205U
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- wireless charging
- main control
- circuit
- chip
- control chip
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Abstract
The utility model discloses a kind of USB wireless charging device, including USB plug, first on-off circuit, main control chip, wireless charging chip and voltage detecting circuit, the switch controlling signal outfan of main control chip is connected with the control end of described first on-off circuit, the power output end of described wireless charging chip is leaded up to described first on-off circuit and is connected with the power end of described USB plug, and an other road is connected with the power end of described main control chip；The input of described voltage detecting circuit is connected with power output end and first on-off circuit of described wireless charging chip, and outfan is connected with the A/D end of convert of described main control chip.USB wireless charging device of the present utility model, by detection wireless charging chip output voltage and control wireless charging chip by the power end of USB plug be electronic equipment charging, achieve and carry out wireless charging for the electronic equipment without wireless charging function, improve the utilization rate of wireless charging device so that the advantage of wireless charging widely benefits common electronic product.
Description
Technical field
This utility model relates to a kind of charging device, specifically, relates to a kind of USB wireless charging device.
Background technology
Along with the development of wireless charging technology, this technology is increasingly used in consumer electronics product, due to always
The electronic product of formula generally uses USB interface to be charged by power supply adaptor, simultaneously takes account of mobile phone volume and cost is wanted
Asking, the electronic product of a lot of new listing does not the most have wireless charging function, still uses usual USB interface to pass through power adaptation
Device is charged, and based on this, how on the premise of not changing common electronic product charging circuit, improves wireless charging Denso
The utilization rate put and increase wireless charging function for old-fashioned consumer electronics product so that the advantage of wireless charging widely favour
And common electronic product, it is that this utility model mainly solves the technical problem that.
Summary of the invention
This utility model cannot be carried out wireless charging to solve the existing electronic product arranging wireless charging circuit the most specially
The technical problem of electricity, it is proposed that a kind of USB wireless charging device, can carry out wireless charging to the electronic product with USB interface
Electricity.
In order to solve above-mentioned technical problem, this utility model is achieved by the following technical solutions:
A kind of USB wireless charging device, including USB plug, the first on-off circuit, main control chip, wireless charging chip, with
And voltage detecting circuit, the switch controlling signal outfan of described main control chip connects with the control end of described first on-off circuit
Connecing, the power output end of described wireless charging chip leads up to the power end of described first on-off circuit and described USB plug
Connecting, be used for exporting charging voltage, an other road is connected with the power end of described main control chip, for carrying for described main control chip
For running voltage；The input of described voltage detecting circuit power output end and first with described wireless charging chip respectively is opened
Pass circuit connects, and outfan is connected with the A/D end of convert of described main control chip, and described voltage detecting circuit is for by described wireless
During charging chip charging, the electric current of output is converted to voltage signal, and transmission to described main control chip detects, described master control
Chip generates switch controlling signal according to testing result and sends to described first on-off circuit, is used for controlling described first switch electricity
The conducting state on road.
Further, also include that second switch circuit, described second switch are electrically connected to described wireless charging chip
Between the power end of power output end and described main control chip.
Further, a described first on-off circuit two ends diode in parallel, the anode of described diode and described USB
The power end of plug connects, and negative electrode is connected through the power output end of overvoltage detection circuit with described wireless charging chip.
Further, also include that warning circuit, described warning circuit connect with the alarm signal output ends of described main control chip
Connect.
Further, described warning circuit includes a light emitting diode, the anode of described light emitting diode and described master control
The alarm signal output ends of chip connects, and negative electrode is connected to the ground end through current-limiting resistance.
Further, described first on-off circuit includes the first PMOS, the grid of described first PMOS and described master
The switch controlling signal outfan of control chip connects, and drain electrode is connected with the power end of described USB plug, source electrode and described wireless charging
The power output end of electrical chip connects.
Further, described voltage detecting circuit includes operational amplification circuit and the first resistance, described first resistant series
Between the power output end and the power end of described USB plug of described wireless charging chip, described operational amplification circuit collection
The voltage at described first resistance two ends is also amplified, and is inputted to main control chip by the A/D end of convert of described main control chip.
Further, described second switch circuit include the second PMOS, the grid of described second PMOS and source electrode with
The power output end of described wireless charging chip connects, and a drain electrode wherein road is connected, additionally with the power end of described main control chip
One tunnel is connected with the power end of described operational amplifier.
Further, the data transmit-receive end of described USB plug is connected with the first data transmit-receive end of described main control chip, institute
The data transmit-receive end of the second data transmit-receive end and described wireless charging chip of stating main control chip is connected.
Further, described USB plug is type A type plug, type Type B plug, type c-type plug, mini USB
One in plug or microUSB plug.
Compared with prior art, advantage of the present utility model and good effect are: USB wireless charging Denso of the present utility model
Put, by the detection output voltage of wireless charging chip and to control wireless charging chip by the power end of USB plug be electronics
Equipment charge, can be embodied as carrying out wireless charging without the electronic equipment of wireless charging function, improves making of wireless charging device
By rate so that the advantage of wireless charging widely benefits common electronic product.
After reading in conjunction with the accompanying the detailed description of this utility model embodiment, other features of the present utility model and advantage
Will become clearer from.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is a kind of embodiment functional-block diagram of the USB wireless charging device that this utility model is proposed；
Fig. 2 is a kind of embodiment circuit theory diagrams of the USB wireless charging device that this utility model is proposed.
Detailed description of the invention
The electronic equipments such as Android mobile phone in the market, panel computer, Baffle Box of Bluetooth, intelligent wearable product, generally
Using USB interface to be charged by power supply adaptor, along with the development of wireless charging technology, wireless charging technology is the most gradually
Apply in electronic equipment of various, but the electronics product for not having wireless charging function that most consumers has been bought
Product, owing to the replacement and obsoleteness frequency of this electronic product is the highest, therefore cannot enjoy wireless charging function, based on
This, this utility model is for the electronic equipment that USB interface can only be used to be charged by power supply adaptor, it is proposed that a kind of
USB wireless charging device, it is possible to carry out wireless charging for this class of electronic devices.
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Embodiment one, the present embodiment proposes a kind of USB wireless charging device, as it is shown in figure 1, include USB plug, first
On-off circuit, main control chip, wireless charging chip and voltage detecting circuit, the switch controlling signal outfan of main control chip
Being connected with the control end of the first on-off circuit, the power output end of wireless charging chip leads up to the first on-off circuit and voltage
Testing circuit is connected with the power end of described USB plug, is used for exporting the power end of charging voltage, an other road and main control chip
Connect, for providing running voltage for main control chip；The input of voltage detecting circuit and the first resistance two ends connect, outfan
Being connected with the A/D end of convert of main control chip, voltage detecting circuit is the electric current of output in time being charged by described wireless charging chip
Being converted to voltage signal, and send and detect to main control chip, main control chip generates switch controlling signal according to testing result
Send to described first on-off circuit, for controlling the conducting state of the first on-off circuit.The USB wireless charging Denso of the present embodiment
Putting, its USB plug is suitable with the USB interface of electronic equipment, when this USB wireless charging device is inserted into the USB of electronic equipment
During interface, if now the external world has wireless charging emission source, electromagnetic wave signal is entered by the power output end of wireless charging chip
Row conversion output voltage, during voltage detecting circuit detection charging, the electric current of charge circuit is in safety range, controls first and opens
Closing circuit turn-on, be that electronic equipment charges by USB plug, wireless charging chip is for electric for main control chip offer work simultaneously
Pressure, can be embodied as carrying out wireless charging without the electronic equipment of wireless charging function, improves the utilization rate of wireless charging device, makes
The advantage obtaining wireless charging widely benefits common electronic product.
The type of USB plug can be type A type plug, type Type B plug, type c-type plug, mini USB insert
One in head or microUSB plug.
As it is shown in figure 1, this USB wireless charging device also includes second switch circuit, second switch is electrically connected to described
Between power output end and the power end of described main control chip of wireless charging chip.Second switch circuit is for controlling master control
Chip and the power supply of operational amplifier.
The most in the present embodiment, as in figure 2 it is shown, the first on-off circuit includes the first PMOS D1, a described PMOS
The grid of pipe D1 is connected with the switch controlling signal outfan of described main control chip U1, drain electrode and the power supply of described USB plug U3
End connects, and source electrode is connected through the power output end of the first resistance with described wireless charging chip U2.When wireless charging chip U2's
During power output end output high level, illustrate that wireless charging chip U2 can carry out wireless charging, the electricity of wireless charging chip U2
Source output terminal one tunnel provides running voltage for main control chip U1, and main control chip U1 works, the switch controlling signal of main control chip U1
Outfan output low level, controls the first PMOS D1 conducting, and the power output end of wireless charging chip U2 passes through USB plug U3
Power end output charging voltage.
Charging voltage for preventing wireless charging chip U2 from exporting is higher, damages electronic equipment, described first on-off circuit
Two ends are parallel with diode D3, and the anode of diode D3 is connected with the power end of USB plug U3, negative electrode and wireless charging chip U2
Power output end connect.
First PMOS D1 and diode D3 constitute a voltage director switch, the source electrode of PMOS field effect transistor D1 and two poles
The negative electrode of pipe D3 is connected with the voltage output pin of radio charging chip 2, in the control of MCU1 by a low resistance resistor R1
The current detecting of charge circuit when can be charged under system.
When this USB wireless charging device is inserted into the USB interface of electronic equipment, if now the external world does not has wireless charging to send out
When penetrating source, wireless charging chip U2 not output supply voltage, if now the battery electric quantity of electronic equipment is more sufficient, then electronics
The cell voltage of equipment provides running voltage, main control chip U1 work through diode D3, second switch circuit for main control chip U1
Make, consume the battery electric quantity in electronic equipment, in order to prevent from the electric energy of electronic equipment is caused unnecessary waste, the most also wrap
Including warning circuit, described warning circuit is connected with the alarm signal output ends of described main control chip U1.When this kind of situation occurs,
Main control chip U1 output alarm signal, controls warning circuit and carries out alarm, and USB wireless charging device is set by user from electronics
Pull up on Bei, or open wireless charging emission source and can release warning.
As a preferred embodiment, in the present embodiment, warning circuit includes a light emitting diode D4 and a current-limiting resistance
R4, the anode of this light emitting diode D4 is connected with the alarm signal output ends of main control chip U1, and negative electrode connects through current-limiting resistance R4
Ground end, main control chip U1 exports high level by alarm signal output ends, and light emitting diode D4 lights and carries out alarm.
As in figure 2 it is shown, voltage detecting circuit includes operational amplification circuit and the first resistance R1, operation amplifier in the present embodiment
Circuit includes operational amplifier Q1 and the second resistance R2, the 3rd resistance R3, and the first resistance R1 is connected on wireless charging chip U2
Power output end and the power end of USB plug U3 between, operational amplifier Q1 gathers the voltage at the first resistance R1 two ends and goes forward side by side
Row amplification exports the A/D end of convert to main control chip U1, and operational amplifier Q1 constitutes voltage detecting circuit with resistance R1, R2, R3,
By detecting the voltage at the first resistance R1 two ends, owing to the resistance of the first resistance R1 is it is known that the electricity at therefore the first resistance R1 two ends
Pressure be directly proportional to electric current therethrough, main control chip U1 by detect the voltage actual monitored at the first resistance R1 two ends be through
The electric current of the first resistance R1, when the voltage at the first resistance R1 two ends exceedes pre-set limit, illustrates that wireless charging chip U2 exports
Electric current exceeded limit value, main control chip U1 by control first on-off circuit close protect electronic equipment, another aspect can
Burn the first resistance R1 and reach to protect the purpose of electronic equipment.
Owing to PMOS has low in energy consumption, the advantage of fast response time, second switch circuit includes second in the present embodiment
PMOS D2, grid and the source electrode of the second PMOS D2 are connected with the power output end of described wireless charging chip U2, drain it
In a road be connected with the power end of main control chip U1, an other road is connected with the power end of described operational amplifier, when second
During the conducting of PMOS D2, a wireless charging chip U2 wherein road provides running voltage for main control chip U1, and an other road is computing
Amplifier Q1 provides running voltage.When the source electrode of the second PMOS D2 has high level, this field effect transistor is opened, to main control chip
U1 and operational amplifier are powered, otherwise, close.
This USB wireless charging device has four kinds of states: device inserts low-voltage electronic equipment and is not charged, and device inserts
Low-voltage electronic product is charged, and device inserts non-low-voltage electronic product and is charged, and device inserts computer and carries out system
State in upgrading and parameter adjustment four, details are as follows respectively for operation principle:
Wireless charging emission source is not had near low-voltage electronic equipment, and this device when this USB wireless charging device inserts
Time, owing to wireless charging chip U2 does not receives radio wave, the source electrode of the first PMOS D1 and the cathode voltage of diode D3
For low, if now the cell voltage of electronic equipment can not be by second switch circuit after diode D3 and resistance R1 dividing potential drop
Conducting, then, at this USB wireless charging device and off position, whole apparatus system does not runs.
When this USB wireless charging device inserts low-voltage electronic equipment, and this device is when wireless charging emission source, nothing
The power supply output foot output high level of line charging chip U2, now the second PMOS D2 conducting, system starts power supply.Master control core
Sheet U1 controls to open the first PMOS D1, and owing to the voltage of diode D3 negative electrode is higher than the voltage of anode, diode D3 ends,
Charge path now be wireless charging chip U2 through Low ESR precision resister R1, the first PMOS D1 to USB plug U3
Power end, is charged electronic equipment.
When this USB wireless charging device insert non-low-voltage electronic equipment, when and this device near do not have wireless charging to send out
When penetrating source, owing to the anode voltage of diode D3 makes diode D3 turn on higher than cathode voltage, if now the second PMOS D2
The voltage of source electrode is less than the cut-in voltage of PMOS field effect transistor, and whole device does not has power supply to power, and now device does not runs.If this
Time the second PMOS D2 source electrode voltage higher than the cut-in voltage of PMOS field effect transistor, main control chip U1 is amplified by detection calculations
The voltage of device Q1 outfan, and reported to the police by light emitting diode D4.
The data transmit-receive end of USB plug U3 is connected with the first data transmit-receive end of described main control chip U1, described master control core
The second data transmit-receive end of sheet U1 is connected with the data transmit-receive end of described wireless charging chip U2.When radio rechargeable standard is carried out
During adjustment, by USB plug U3, this wireless charging device is inserted host computer, by USB plug U3, data to be upgraded are passed
Transport to main control chip U1, then be updated to wireless charging chip U2 by main control chip U1, i.e. can be with the upgrading of completion system and parameter
Adjust.
Certainly, described above is not to restriction of the present utility model, and this utility model is also not limited to the example above,
Change that those skilled in the art are made in essential scope of the present utility model, retrofit, add or replace,
Also protection domain of the present utility model should be belonged to.
Claims (10)
1. a USB wireless charging device, it is characterised in that: include USB plug, the first on-off circuit, main control chip, wireless charging
Electrical chip and voltage detecting circuit, the switch controlling signal outfan of described main control chip and described first on-off circuit
Controlling end to connect, the power output end of described wireless charging chip leads up to described first on-off circuit and described USB plug
Power end connect, be used for exporting charging voltage, an other road is connected with the power end of described main control chip, is used for as described master
Control chip provides running voltage；The power output end of the input of described voltage detecting circuit and described wireless charging chip and the
One on-off circuit connects, and outfan is connected with the A/D end of convert of described main control chip, and described voltage detecting circuit is for by described
During the charging of wireless charging chip, the electric current of output is converted to voltage signal, and the transmission of this voltage signal is entered to described main control chip
Row detection, described main control chip generates switch controlling signal according to testing result and sends to described first on-off circuit, is used for controlling
Make the conducting state of described first on-off circuit.
USB wireless charging device the most according to claim 1, it is characterised in that: also include second switch circuit, described
Two on-off circuits are connected between power output end and the power end of described main control chip of described wireless charging chip.
USB wireless charging device the most according to claim 1, it is characterised in that: described first on-off circuit two ends are in parallel
One diode, the anode of described diode is connected with the power end of described USB plug, negative electrode and described wireless charging chip
Power output end connects.
USB wireless charging device the most according to claim 1, it is characterised in that: also include warning circuit, described warning electricity
Road is connected with the alarm signal output ends of described main control chip.
USB wireless charging device the most according to claim 4, it is characterised in that: described warning circuit includes a luminescence two
Pole is managed, and the anode of described light emitting diode is connected with the alarm signal output ends of described main control chip, and negative electrode is through current-limiting resistance
It is connected to ground.
6. according to the USB wireless charging device described in any one of claim 1-5, it is characterised in that: described first on-off circuit
Including the first PMOS, the grid of described first PMOS is connected with the switch controlling signal outfan of described main control chip, leakage
Pole is connected with the power end of described USB plug, and source electrode is connected with the power output end of described wireless charging chip.
USB wireless charging device the most according to claim 2, it is characterised in that: described voltage detecting circuit includes computing
Amplifying circuit and the first resistance, described first resistant series is inserted with described USB at the power output end of described wireless charging chip
Between the power end of head, described operational amplification circuit gathers the voltage at described first resistance two ends and is amplified, by described
The A/D end of convert of main control chip inputs to main control chip.
USB wireless charging device the most according to claim 7, it is characterised in that: described second switch circuit includes second
PMOS, grid and the source electrode of described second PMOS are connected with the power output end of described wireless charging chip, drain wherein
One tunnel is connected with the power end of described main control chip, and an other road is connected with the power end of described operational amplification circuit.
9. according to the USB wireless charging device described in any one of claim 1-5, it is characterised in that: the data of described USB plug
Sending and receiving end is connected with the first data transmit-receive end of described main control chip, the second data transmit-receive end of described main control chip and described nothing
The data transmit-receive end of line charging chip connects.
10. according to the USB wireless charging device described in any one of claim 1-5, it is characterised in that: described USB plug is
One in type A type plug, type Type B plug, type c-type plug, mini USB plug or microUSB plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620450766.4U CN205829205U (en) | 2016-05-18 | 2016-05-18 | A kind of USB wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620450766.4U CN205829205U (en) | 2016-05-18 | 2016-05-18 | A kind of USB wireless charging device |
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| Publication Number | Publication Date |
|---|---|
| CN205829205U true CN205829205U (en) | 2016-12-21 |
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ID=57557704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620450766.4U Active CN205829205U (en) | 2016-05-18 | 2016-05-18 | A kind of USB wireless charging device |
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| Country | Link |
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| CN (1) | CN205829205U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871024A (en) * | 2016-05-18 | 2016-08-17 | 青岛歌尔声学科技有限公司 | USB wireless charging device |
| WO2021018208A1 (en) * | 2019-07-29 | 2021-02-04 | Oppo广东移动通信有限公司 | Firmware upgrade method and apparatus, electronic device, and storage medium |
-
2016
- 2016-05-18 CN CN201620450766.4U patent/CN205829205U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871024A (en) * | 2016-05-18 | 2016-08-17 | 青岛歌尔声学科技有限公司 | USB wireless charging device |
| WO2021018208A1 (en) * | 2019-07-29 | 2021-02-04 | Oppo广东移动通信有限公司 | Firmware upgrade method and apparatus, electronic device, and storage medium |
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