CN105337333A - Electromagnetic induction and USB dual-port charging control circuit and control flow - Google Patents
Electromagnetic induction and USB dual-port charging control circuit and control flow Download PDFInfo
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- CN105337333A CN105337333A CN201410402365.7A CN201410402365A CN105337333A CN 105337333 A CN105337333 A CN 105337333A CN 201410402365 A CN201410402365 A CN 201410402365A CN 105337333 A CN105337333 A CN 105337333A
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Abstract
The invention provides an electromagnetic induction and USB dual-port charging control circuit and control flow. A limited input power source (Adaptor) is utilized, based on that normal use of basic devices is guaranteed, the power source technology used by a superfluous available current supply appending device is calculated. The flow is characterized by comprising a charging sheet, a wireless charger body and an auxiliary device, the auxiliary device comprises a power source output controller and a USB interface, the charger can realize wireless charging, so the charger can be used without repeatedly plugging and unplugging a charging plug, so the charger is prevented from being damaged by frequent plugging and unplugging.
Description
Technical field
The present invention relates to a kind of charging control circuit, particularly a kind of electromagnetic induction and USB dual-port charging control circuit and control flow.
Background technology
Charger is now divided into two kinds, a kind of for not add Cable line, and its low-profile is easy to use, but a charger can only be a mobile phone; Another kind is added with Cable line, and profile is bigger than normal, but a charger can be two mobile phone chargings, but wired charging plays phone in charging, and office online, amusement and recreation have potential safety hazard again.In daily life, work, leisure, the power consumption of smart mobile phone is relatively large, needs to supplement electric power at any time, due to traditional wired charge mode in use, need plug charging plug repeatedly, easily cause interface to damage, cause charging.Modern society has two mobile phone personages and increases gradually, can only be the actual demand that pattern that a mobile phone carries out charging progressively cannot meet current user.Phone is played in charging, office online, amusement and recreation have potential safety hazard again, wireless charging becomes the direction of future development, in view of the deficiency that prior art exists, need to provide a kind of safe and convenient, a kind of of hommization is the wireless charger that two mobile phones charge with/without line simultaneously, therefore needs to design a kind of novel USB charging control circuit.
Summary of the invention
According to above technical problem, the invention provides a kind of electromagnetic induction and USB dual-port charging control circuit and control flow, utilize the input power (Adaptor) limited when ensureing that basic device normally uses, calculate the power technology that unnecessary available current supply supplementing device uses, it is characterized in that comprising charge sheet, wireless charger body, servicing unit, described servicing unit comprises power supply o controller, USB interface, described wireless charger body comprises operational amplifier, output voltage stabilizer, microprocessor, resistance, wireless charging system, wired charging system, described wireless charging system is connected with operational amplifier by resistance, described operational amplifier is connected with microprocessor, described microprocessor respectively and output voltage stabilizer, wired charging system connects, described wired charging system is connected with output voltage stabilizer, described wired charging system is connected with servicing unit, when mobile phone charges on wireless charging device, the size of current of wireless charging, corresponding voltage is converted to by resistance R, be input to (AZV831) in operational amplifier, changed by operation amplifier signal, size compares, the current sensing signal produced is transferred to the ISNS pin of microprocessor (IDTP9035A), the situation of change of ISNS pin voltage responded at ordinary times by microprocessor, the state calculating remaining electric current is distributed, the output of output voltage stabilizer (UP7534GMA5-15) is controlled by the GPIO4 pin output signal of microprocessor, stable voltage is provided to mobile phone, control signal is exported by the GPIO2 pin of microprocessor, be transferred to by the data wire of charge mobile phone USB interface, mobile phone determines charge mode according to the data-signal of USB interface.
A kind of induction type electric current USB charging control circuit control flow, it is characterized in that: first by detecting data wire (D+, the D-) voltage of USB interface, identify the charge mode of USB interface, when electric current USB2.0Mode exports 500mA, wired charging system can carry out low speed charging; When electric current does not carry out wireless charging, Full charging is carried out in wired charging; When electric current USB2.0Mode is less than 500mA, system cuts off wired charging automatically; Then present status is judged with whether state is the same before, when the pattern of sensing changes, for making servicing unit normal induction patterns of change, finally USB interface is exported and reset, electric current according to OP-AMP and low resistance (about 20mA) becomes voltage, the signal of Micro-processor MCV to its ISNS pin is monitored at ordinary times, within support electric current, after microprocessor calculates, unnecessary electric current is used in wired charging system.
Described available current computing formula is: and available current (residual current=Gong Ying electricity Liu – electric current).
Described detection method is: according to the resistance of operational amplifier OPAMP (IC12) and triode R24 (0.022ohm) current value carried out sensing and be sent to microprocessor, microprocessor at ordinary times induced voltage distributes residual current, and the microprocessor of induced current use amount utilizes GPIO2 and GPIO4 to control.
Described microprocessor utilizes GPIO2 and GPIO4 to control.
Described charge sheet is fixed on battery.
Beneficial effect of the present invention is: the present invention is a kind of electromagnetic induction and USB dual-port charging control circuit and control flow, the present invention be a kind of utilize the input power of restriction (Adaptor etc.) when ensure basic device normally use, calculate unnecessary available current supply supplementing device use power supply.The charge sheet of setting is fixed on the battery of required charging by the present invention, be connected with wireless charger body by electromagnetic wave induction principle during use, realize wireless charging, do not need plug charging plug repeatedly in use, avoiding charger because the plug frequently generation of the situation of infringement, also avoiding the situation damaging charge port because forgetting charging to cause pullling charging wire to occur simultaneously.The present invention is wireless charging, does not need to plug, and the scattered time can be utilized to charge, and when mobile phone can charge voluntarily close to time of the present invention, avoids mobile phone not have electricity.Safe and convenient when the present invention uses, can use wired, wireless is that two mobile phones charge simultaneously.The present invention utilizes the device of USB power source to detect the data wire (D+ of USB interface, D-) after voltage, when identification USBMode identification 2.0, maximum current uses and controls within 500mA, present status is judged with whether state is the same before, be the operation carrying out on after servicing unit normal induction Mode being changed USB interface is exported simultaneously off again when induction Mode change, major part use the device of USB power source only have in the early stage input power time Mode is confirmed.
accompanying drawing explanation
Fig. 1 is control circuit frame diagram of the present invention;
Fig. 2 is circuit diagram of the present invention;
Fig. 3 is that the present invention controls to use flow chart.
Embodiment
According to Fig. 1, Fig. 2, Fig. 3, the present invention is further described:
Embodiment 1
The utility model is a kind of electromagnetic induction and USB dual-port charging control circuit and control flow, utilize the input power (Adaptor) limited when ensureing that basic device normally uses, calculate the power technology that unnecessary available current supply supplementing device uses, it is characterized in that comprising charge sheet, wireless charger body, servicing unit, servicing unit comprises power supply o controller, USB interface, wireless charger body comprises operational amplifier, output voltage stabilizer, microprocessor, resistance, wireless charging system, wired charging system, wireless charging system is connected with operational amplifier by resistance, operational amplifier is connected with microprocessor, microprocessor respectively and output voltage stabilizer, wired charging system connects, wired charging system is connected with output voltage stabilizer, wired charging system is connected with servicing unit, when mobile phone charges on wireless charging device, the size of current of wireless charging, corresponding voltage is converted to by resistance R, be input to (AZV831) in operational amplifier, changed by operation amplifier signal, size compares, the current sensing signal produced is transferred to the ISNS pin of microprocessor (IDTP9035A), the situation of change of ISNS pin voltage responded at ordinary times by microprocessor, the state calculating remaining electric current is distributed, the output of output voltage stabilizer (UP7534GMA5-15) is controlled by the GPIO4 pin output signal of microprocessor, stable voltage is provided to mobile phone, control signal is exported by the GPIO2 pin of microprocessor, be transferred to by the data wire of charge mobile phone USB interface, mobile phone determines charge mode according to the data-signal of USB interface.
Embodiment 2
By detecting the data wire (D+ of USB interface during use, D-) voltage, identify the charge mode of USB interface, present status is judged with whether state is the same before, when the pattern of sensing changes, for making servicing unit normal induction patterns of change, USB interface is exported and resets, electric current according to OP-AMP and low resistance (about 20mA) becomes voltage, the signal of Micro-processor MCV to its ISNS pin is monitored at ordinary times, within support electric current, after microprocessor calculates, unnecessary electric current is used in wired charging system, when electric current USB2.0Mode exports 500mA, wired charging system can carry out low speed charging, when electric current does not carry out wireless charging, Full charging is carried out in wired charging, when electric current USB2.0Mode is less than 500mA, system cuts off wired charging automatically.
Embodiment 3
Charged by wireless charging device when there being mobile phone, charging current is when more than 1.3A, charging current is through R24(0.022ohm) and operational amplifier (AZV831) signal is changed and size compares, high level is exported from 1 pin of operational amplifier (AZV831), act on the base stage of Q1, Q1 is made to be in by state, therefore the ISNS pin of microprocessor is input as low level signal, microprocessor passes through internal calculation, make the GPIO4 pin output low level of microprocessor, be given to Enable Pin 4 pin exporting voltage stabilizing chip (UP7534GMA5-15), the Enable Pin of this chip is that high level is effective, therefore output 1 pin exporting voltage stabilizing chip (UP7534GMA5-15) does not export, cannot charge the phone.
When wireless charging electric current is at 0.25A---during 1.2A, charging current is changed through the signal of R24 and operational amplifier (AZV831), size compares, from the output 1 pin output low level of operational amplifier, act on the base stage of Q1, Q1 conducting, Q1 collector voltage is raw high, this high level signal is transferred to the ISNS pin of microprocessor, microprocessor passes through internal calculation, the GPIO4 pin of microprocessor is made to export high level, be given to Enable Pin 4 pin exporting voltage stabilizing chip (UP7534GMA5-15), the Enable Pin of this chip is that high level is effective, therefore export voltage stabilizing chip (UP7534GMA5-15) can normally work, output 1 pin of this chip has voltage to export, can charge the phone.Microprocessor passes through internal calculation simultaneously, the GPIO2 pin output low level of microprocessor, the grid of Q3 is added to by a resistance, make Q3 be in by state, power Vcc need through resistance R49, R47 and R48 dividing potential drop, to the data wire D+ of charge mobile phone USB port, D-voltage signal, charge mobile phone detects the data-signal of USB port, makes mobile phone charging current remain on 500mA.
When wireless charging electric current is at below 0.15A, charging current is changed through the signal of R24 and operational amplifier (AZV831), size compares, from the output 1 pin output low level of operational amplifier, act on the base stage of Q1, Q1 conducting, the signal that wireless charging electric current is converted by operational amplifier, be transferred to the ISNS pin of microprocessor, microprocessor passes through internal calculation, the GPIO4 pin of microprocessor is made to export high level, be given to Enable Pin 4 pin exporting voltage stabilizing chip (UP7534GMA5-15), the Enable Pin of this chip is that high level is effective, therefore export voltage stabilizing chip (UP7534GMA5-15) can normally work, output 1 pin of this chip has voltage to export, can charge the phone.Microprocessor passes through internal calculation simultaneously, the GPIO2 pin of microprocessor exports high level, be added to the grid of Q3 by a resistance, make Q3 be in conducting state, electric current is without resistance R47, power Vcc is only through resistance R49 and R48 dividing potential drop, be added to the data wire D+ of charge mobile phone USB port, D-, charge mobile phone detects the data-signal of USB port, how much can charge according to the battery electric quantity of mobile phone, make mobile phone charging current unrestricted.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (6)
1. an electromagnetic induction and USB dual-port charging control circuit and control flow, utilize the input power (Adaptor) limited when ensureing that basic device normally uses, calculate the power technology that unnecessary available current supply supplementing device uses, it is characterized in that comprising charge sheet, wireless charger body, servicing unit, described servicing unit comprises power supply o controller, USB interface, described wireless charger body comprises operational amplifier, output voltage stabilizer, microprocessor, resistance, wireless charging system, wired charging system, described wireless charging system is connected with operational amplifier by resistance, described operational amplifier is connected with microprocessor, described microprocessor respectively and output voltage stabilizer, wired charging system connects, described wired charging system is connected with output voltage stabilizer, described wired charging system is connected with servicing unit, when mobile phone charges on wireless charging device, the size of current of wireless charging, corresponding voltage is converted to by resistance R, be input to (AZV831) in operational amplifier, changed by operation amplifier signal, size compares, the current sensing signal produced is transferred to the ISNS pin of microprocessor (IDTP9035A), the situation of change of ISNS pin voltage responded at ordinary times by microprocessor, the state calculating remaining electric current is distributed, the output of output voltage stabilizer (UP7534GMA5-15) is controlled by the GPIO4 pin output signal of microprocessor, stable voltage is provided to mobile phone, control signal is exported by the GPIO2 pin of microprocessor, be transferred to by the data wire of charge mobile phone USB interface, mobile phone determines charge mode according to the data-signal of USB interface.
2. an electromagnetic induction and USB dual-port charging control circuit and control flow, it is characterized in that: first by detecting the data wire (D+ of USB interface, D-) voltage, identify the charge mode of USB interface, when electric current USB2.0Mode exports 500mA, wired charging system can carry out low speed charging; When electric current does not carry out wireless charging, Full charging is carried out in wired charging; When electric current USB2.0Mode is less than 500mA, system cuts off wired charging automatically; Then present status is judged with whether state is the same before, when the pattern of sensing changes, for making servicing unit normal induction patterns of change, finally USB interface is exported and reset, electric current according to OP-AMP and low resistance (about 20mA) becomes voltage, the signal of Micro-processor MCV to its ISNS pin is monitored at ordinary times, within support electric current, after microprocessor calculates, unnecessary electric current is used in wired charging system.
3., according to a kind of electromagnetic induction according to claim 1 and USB dual-port charging control circuit and control flow, it is characterized in that described available current computing formula is: available current (residual current=Gong Ying electricity Liu – electric current).
4. according to electromagnetic induction according to claim 1 and USB dual-port charging control circuit and control flow, it is characterized in that described amount detection method is: according to the resistance of operational amplifier OPAMP (IC12) and triode R24 (0.022ohm) current value carried out sensing and be sent to one chip microcomputer (microprocessor), one chip microcomputer (microprocessor) at ordinary times induced voltage distributes residual current, and the microprocessor of induced current use amount utilizes GPIO2 and GPIO4 to control.
5., according to a kind of electromagnetic induction according to claim 1 and USB dual-port charging control circuit and control flow, it is characterized in that the microprocessor of described induced current use amount utilizes GPIO2 and GPIO4 to control.
6., according to electromagnetic induction according to claim 1 and USB dual-port charging control circuit and control flow, it is characterized in that described charge sheet is fixed on battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402365.7A CN105337333A (en) | 2014-08-15 | 2014-08-15 | Electromagnetic induction and USB dual-port charging control circuit and control flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410402365.7A CN105337333A (en) | 2014-08-15 | 2014-08-15 | Electromagnetic induction and USB dual-port charging control circuit and control flow |
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| CN105337333A true CN105337333A (en) | 2016-02-17 |
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| CN201410402365.7A Pending CN105337333A (en) | 2014-08-15 | 2014-08-15 | Electromagnetic induction and USB dual-port charging control circuit and control flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107637927A (en) * | 2017-10-31 | 2018-01-30 | 捷开通讯(深圳)有限公司 | Intelligent worn device with built-in charging structure |
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| CN101944758A (en) * | 2010-09-24 | 2011-01-12 | 鸿富锦精密工业（深圳）有限公司 | Battery management system with function of dynamically assigning charging current and method thereof |
| CN102201681A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Power supply management system of portable computer |
| CN203589781U (en) * | 2013-11-11 | 2014-05-07 | 深圳市松果数码科技有限公司 | Mobile power supply |
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2014
- 2014-08-15 CN CN201410402365.7A patent/CN105337333A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201681A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Power supply management system of portable computer |
| CN101944758A (en) * | 2010-09-24 | 2011-01-12 | 鸿富锦精密工业（深圳）有限公司 | Battery management system with function of dynamically assigning charging current and method thereof |
| CN203589781U (en) * | 2013-11-11 | 2014-05-07 | 深圳市松果数码科技有限公司 | Mobile power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107637927A (en) * | 2017-10-31 | 2018-01-30 | 捷开通讯(深圳)有限公司 | Intelligent worn device with built-in charging structure |
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Application publication date: 20160217 |