CN104158257B - Induction type electric current and USB bimodulus charging control circuit and realize method - Google Patents
Induction type electric current and USB bimodulus charging control circuit and realize method Download PDFInfo
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Abstract
The present invention relates to a kind of induction type electric current USB bimodulus charging control circuit and realize method, main circuit is connected and composed by microprocessor, current-sensing circuit and USB control circuit, microprocessor adopts IDT_P9035A_DST, and current-sensing circuit is made up of operational amplifier A ZV831, transistor Q1 and Resistor-Capacitor Unit；USB control circuit is formed by exporting voltage stabilizing chip UP7534GMA5-15, IGCT Q3, USB interface and Resistor-Capacitor Unit, when wireless charger circuit is charged operation, when the voltage being carried between operational amplifier A ZV831 pin 3, pin 4 is not charged operation less than wireless charger circuit, the microprocessor IDT_P9035A_DST real-time change situation according to sensing ISNS pin voltage, calculate the state of remaining electric current, carry out power energy allocation；Utilize the power supply adaptor of limited output 1.8A electric current, when ensureing that wireless charging electric energy normally uses, calculate unnecessary available current, charged the phone by wired USB interface.
Description
Technical field
The present invention relates to a kind of charging control circuit, particularly to a kind of induction type electric current and USB bimodulus charging control circuit, be used for realizing two kinds of charge modes of wire/wireless is two mobile phone chargings simultaneously.
Background technology
The wired charge mode of traditional mobile phone is in use, it is necessary to plug charging plug repeatedly.Daily life, work, in leisure, the power consumption of smart mobile phone is relatively large, it is necessary to supplement electric power at any time.Taking phone in charging, office online, amusement and recreation have again potential safety hazard；
And mobile phone wireless charging becomes the direction of future development, the product of present wireless charging is a lot, its shortcoming is: owing to providing galvanic adapter to wireless charger, and its output electric current is limited (1.8A) so the time of its charging is longer, only uses when the time is well-to-do.
Increase gradually along with modern society has two mobile phone personages, be only the pattern that a mobile phone is charged and progressively cannot meet the actual demand of current user. in view of the deficiency that prior art exists.
The common drawback of conventional wired or wireless charger is that charger 1 can only fill 1 mobile phone.
Now, market demand provides one safe and convenient more, hommization, the wireless charger that can be simultaneously the charging of two mobile phones,
Owing to providing galvanic adapter to wireless charger, its output electric current is limited (1.8A), it is thus desirable to design a kind of novel USB charging control circuit, it utilizes the power supply adaptor of limited output electric current (1.8A), when ensureing that wireless charging electric energy normally uses, calculate unnecessary available current, the technology charged the phone by wired USB interface and charging control circuit.Domestic at present there is not yet this series products, also have no correlation technique bibliographical information.
Summary of the invention
The purpose of the present invention is exactly for overcoming the deficiencies in the prior art, a kind of induction type electric current and USB bimodulus charging control circuit design are provided, utilize limited input current (power supply adaptor supplying DC power source), when ensureing that the first wireless charging device normally uses, by calculating remaining available current, utilize remaining available current by USB interface to another mobile phone charging.
The present invention is realized by such technical scheme: induction type electric current and USB bimodulus charging control circuit, it is characterized in that, main circuit is connected and composed by microprocessor, current-sensing circuit and USB control circuit, perform signal processing by the program of microprocessor, and then control current-sensing circuit and USB control circuit realize the output of bimodulus charging current；With this main circuit for platform, it is achieved induction type electric current, USB charge control；
Described microprocessor adopts IDT_P9035A_DST；
Described current-sensing circuit is made up of operational amplifier A ZV831, transistor Q1 and Resistor-Capacitor Unit；
Described USB control circuit is formed by exporting voltage stabilizing chip UP7534GMA5-15, IGCT Q3, USB interface and Resistor-Capacitor Unit；
The operational amplifier A ZV831 in-phase input end pin 3 of current-sensing circuit connects one end of resistance R24 by resistance R26, and from then on end connects wireless charger circuit；
Operational amplifier A ZV831 inverting input pin 4 connects the other end of resistance R24 by resistance R25, and from then on end connects 5V positive source；
Operational amplifier A ZV831 outfan pin 1 connects transistor Q1 base stage by resistance R28, the colelctor electrode of transistor Q1 connects the ISNS pin of microprocessor IDT_P9035A_DST by resistance R30, by resistance R29 ground connection, the emitter stage concatenation operation amplifier AZV831 pin 4 of transistor Q1；
Bridging feedback capacity C27 between the pin 2 of operational amplifier A ZV831, pin 5, pin 5 connects 5V positive source, pin 2 ground connection；
It is connected across between 5V positive source and ground after filter capacitor C40, electric capacity C41 parallel connection；
5V positive source provides charge power supply by resistance R24 for wireless charger circuit；
When mobile phone charges on wireless charging device, 5V power supply flows through the wireless charging electric current of resistance R24 and produces pressure drop on resistance R24, this pressure drop is carried between operational amplifier A ZV831 pin 3, pin 4, voltage signal is compared by operational amplifier A ZV831, amplifies, changes the current signal produced, transistor Q1 base stage is sent into by operational amplifier A ZV831 outfan pin 1, current signal is amplified by transistor Q1, sends into the ISNS pin of microprocessor IDT_P9035A_DST through transistor Q1 colelctor electrode；
After induction type electric current and USB bimodulus charging control circuit switch on power, when 5V power supply provides charging current for wireless charger circuit, the voltage being carried between operational amplifier A ZV831 pin 3, pin 4 is carried in the voltage between operational amplifier A ZV831 pin 3, pin 4 when not being charged operation less than wireless charger circuit；The microprocessor IDT_P9035A_DST real-time change situation according to sensing ISNS pin voltage, calculates the state of remaining electric current, carries out power energy allocation；
The output state that signal controls the output voltage stabilizing chip UP7534GMA5-15 of described USB control circuit is exported by the GPIO4 pin of microprocessor IDT_P9035A_DST, stable voltage is provided for wired charger, control signal is exported by the GPIO2 pin of microprocessor IDT_P9035A_DST, control the data wire D+ of USB interface, D-voltage, mobile phone determines charge mode according to the data of data wire D+, the D-voltage of USB interface.
The invention has the beneficial effects as follows: utilize the power supply adaptor of limited output electric current (1.8A), when ensureing that wireless charging electric energy normally uses, calculate unnecessary available current, the technology charged the phone by wired USB interface and charging control circuit.
Accompanying drawing explanation
Fig. 1, induction type electric current USB bimodulus charging control circuit figure；
Fig. 2, power control flow figure.
Detailed description of the invention
Understand the present invention in order to clearer, the present invention be described in detail in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1, 2, induction type electric current USB bimodulus charging control circuit,
Induction type electric current and USB bimodulus charging control circuit, it is characterized in that, main circuit is connected and composed by microprocessor, current-sensing circuit and USB control circuit, perform signal processing by the program of microprocessor, and then control current-sensing circuit and USB control circuit realize the output of bimodulus charging current；With this main circuit for platform for platform, it is achieved induction type electric current, USB charge control；
Described microprocessor adopts IDT_P9035A_DST；
Described current-sensing circuit is made up of operational amplifier A ZV831, transistor Q1 and Resistor-Capacitor Unit；
Described USB control circuit is formed by exporting voltage stabilizing chip UP7534GMA5-15, IGCT Q3, USB interface and Resistor-Capacitor Unit；
Current-sensing circuit is made up of operational amplifier A ZV831, transistor Q1 and Resistor-Capacitor Unit；Operational amplifier A ZV831 in-phase input end pin 3 connects one end of resistance R26 by resistance R26, and from then on end connects wireless charger circuit；
Operational amplifier A ZV831 inverting input pin 4 connects the other end of resistance R26 by resistance R25, and from then on end connects 5V positive source；
Operational amplifier A ZV831 outfan pin 1 connects transistor Q1 base stage by resistance R28, the colelctor electrode of transistor Q1 connects the ISNS pin of microprocessor IDT_P9035A_DST by resistance R30, by resistance R29 ground connection, the emitter stage concatenation operation amplifier AZV831 pin 4 of transistor Q1；
Bridging feedback capacity C27 between the pin 2 of operational amplifier A ZV831, pin 5, pin 5 connects 5V positive source, pin 2 ground connection；
It is connected across between 5V positive source and ground after electric capacity C40, electric capacity C41 parallel connection；
5V positive source provides charge power supply by resistance R26 for wireless charger circuit；
Induction type electric current and USB bimodulus charging control circuit realize method, when there being mobile phone to be charged by wireless charging device, charging current is when more than 1.3A, charging current is through resistance R24(0.022 ohm) and operational amplifier A ZV831 signal is changed and size compares, high level is exported from the pin 1 of operational amplifier A ZV831, act on the base stage of transistor Q1, transistor Q1 is made to be in cut-off state, therefore the ISNS pin input of microprocessor IDT_P9035A_DST is low level signal, microprocessor IDT_P9035A_DST passes through internal calculation, make the GPIO4 pin output low level of microprocessor IDT_P9035A_DST, pass to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, the Enable Pin of this chip is that high level is effective, outfan 1 foot of output voltage stabilizing chip UP7534GMA5-15 does not export, cannot charge the phone；
When wireless charging electric current is when 0.25A 1.2A, charging current is through resistance R24, change through the signal of operational amplifier A ZV831, size compares, from the outfan 1 foot output low level of operational amplifier A ZV831, act on the base stage of transistor Q1, transistor Q1 turns on, transistor Q1 collector voltage raises, the high level signal of transistor Q1 colelctor electrode is transferred to the ISNS pin of microprocessor IDT_P9035A_DST, calculated by the internal processes of microprocessor IDT_P9035A_DST, process, the GPIO4 pin output high level of microprocessor IDT_P9035A_DST, pass to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, output voltage stabilizing chip UP7534GMA5-15 normal operation, outfan 1 foot of this chip has voltage to export, can charge the phone；
Microprocessor IDT_P9035A_DST is calculated by internal processes simultaneously, its GPIO2 pin output low level, the grid of Q3 it is added to by a resistance, making Q3 be in cut-off state, power Vcc need to through resistance R49, R47 and R48 dividing potential drop, to the data wire D+ of charge mobile phone USB interface, D-voltage signal, charge mobile phone detects the data signal of USB interface, makes mobile phone charging current be maintained at 500mA；
When wireless charging electric current is when below 0.15A, charging current is changed through the signal of R24 and operational amplifier A ZV831, size compares, from the outfan 1 foot output low level of operational amplifier A ZV831, act on the base stage of Q1, Q1 turns on, wireless charging electric current is by the operational amplifier A ZV831 signal converted, it is transferred to the ISNS pin of microprocessor IDT_P9035A_DST, microprocessor IDT_P9035A_DST passes through internal calculation, make the GPIO4 pin output high level of microprocessor IDT_P9035A_DST, it is given to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, the Enable Pin of this chip is that high level is effective, therefore output voltage stabilizing chip UP7534GMA5-15 energy normal operation, outfan 1 foot of this chip has voltage to export, can charge the phone, microprocessor IDT_P9035A_DST passes through internal calculation simultaneously, the GPIO2 pin output high level of microprocessor IDT_P9035A_DST, the grid of IGCT Q3 it is added to by a resistance, make IGCT Q3 in the conduction state, electric current is without resistance R47, power Vcc is only through resistance R49 and R48 dividing potential drop, it is added to the data wire D+ of charge mobile phone USB interface, D-, charge mobile phone detects the data signal of USB interface, how many battery electric quantities according to mobile phone charges, make mobile phone charging current unrestricted；
Utilizing the device that USB interface is charged is mobile phone to be charged, mobile phone to be charged is by detecting the data wire D+ of USB interface, D-voltage, identify the charge mode of USB interface, being judged whether current state and state before be the same by microprocessor IDT_P9035A_DS, when sensing that wireless charging electric current changes, the GPIO4 pin of microprocessor exports low-voltage and postpones 2 seconds, make output voltage stabilizing chip UP7534GMA5-15 restart, USB output is resetted；
By operational amplifier A ZV831 and low resistance resistance R24, electric current change is transferred to voltage, real monitoring when the signal of its ISNS pin is carried out by microprocessor IDT_P9035A_DST, according to the voltage data monitored, microprocessor IDT_P9035A_DST program is calculated, then, high level is exported by GPIO4 foot, control Enable Pin both pin 4 of output voltage stabilizing chip UP7534GMA5-15, now output voltage stabilizing chip UP7534GMA5-15 normal operation, outfan 1 foot of this chip has voltage to export, and unnecessary electric current is fed to USB interface；
Wired charging available current=power supply adaptor for induced current wireless charging device electric current；
When the electric current that the USB interface (USB2.0Mode) of described USB control circuit exports is only 500mA, wired charging is in low speed (low lotus) charge mode；
When described current-sensing circuit is not connected with wireless charger circuit, or when wireless charger circuit does not carry out the state of wireless charging, wired charging is in fullcharging (Full) charge mode；
When the electric current that the USB interface (USB2.0Mode) of described USB control circuit exports is less than 500mA, this time is detected current signal by microprocessor IDT_P9035A_DST according to ISNS pin, make its GPIO4 foot output low level, control Enable Pin and the pin 4 of output voltage stabilizing chip UP7534GMA5-15, output voltage stabilizing chip UP7534GMA5-15 is made to quit work, outfan and the pin 1 of this chip do not have voltage to export, and thus interrupt wired charging.
According to the above description, the solution of the present invention can be realized in conjunction with art technology.
Claims (2)
1. induction type electric current and USB bimodulus charging control circuit, it is characterized in that, main circuit is connected and composed by microprocessor, current-sensing circuit and USB control circuit, perform signal processing by the program of microprocessor, and then control current-sensing circuit and USB control circuit realize the output of bimodulus charging current；With this main circuit for platform, it is achieved induction type electric current, USB charge control；
Described microprocessor adopts IDT_P9035A_DST；
Described current-sensing circuit is made up of operational amplifier A ZV831, transistor Q1 and Resistor-Capacitor Unit；
Described USB control circuit is formed by exporting voltage stabilizing chip UP7534GMA5-15, IGCT Q3, USB interface and Resistor-Capacitor Unit；
The operational amplifier A ZV831 in-phase input end pin 3 of current-sensing circuit connects one end of resistance R24 by resistance R26, and from then on end connects wireless charger circuit；
Operational amplifier A ZV831 inverting input pin 4 connects the other end of resistance R24 by resistance R25, and from then on end connects 5V positive source；
Operational amplifier A ZV831 outfan pin 1 connects transistor Q1 base stage by resistance R28, the colelctor electrode of transistor Q1 connects the ISNS pin of microprocessor IDT_P9035A_DST by resistance R30, by resistance R29 ground connection, the emitter stage concatenation operation amplifier AZV831 pin 4 of transistor Q1；
Bridging feedback capacity C27 between the pin 2 of operational amplifier A ZV831, pin 5, pin 5 connects 5V positive source, pin 2 ground connection；
It is connected across between 5V positive source and ground after filter capacitor C40, electric capacity C41 parallel connection；
5V positive source provides charge power supply by resistance R24 for wireless charger circuit；
When mobile phone charges on wireless charging device, 5V power supply flows through the wireless charging electric current of resistance R24 and produces pressure drop on resistance R24, this pressure drop is carried between operational amplifier A ZV831 pin 3, pin 4, voltage signal is compared by operational amplifier A ZV831, amplifies, changes the current signal produced, transistor Q1 base stage is sent into by operational amplifier A ZV831 outfan pin 1, current signal is amplified by transistor Q1, sends into the ISNS pin of microprocessor IDT_P9035A_DST through transistor Q1 colelctor electrode；
After induction type electric current and USB bimodulus charging control circuit switch on power, when 5V power supply provides charging current for wireless charger circuit, the voltage being carried between operational amplifier A ZV831 pin 3, pin 4 is carried in the voltage between operational amplifier A ZV831 pin 3, pin 4 when not being charged operation less than wireless charger circuit；The microprocessor IDT_P9035A_DST real-time change situation according to sensing ISNS pin voltage, calculates the state of remaining electric current, carries out power energy allocation；
The output state that signal controls the output voltage stabilizing chip UP7534GMA5-15 of described USB control circuit is exported by the GPIO4 pin of microprocessor IDT_P9035A_DST, stable voltage is provided for wired charger, control signal is exported by the GPIO2 pin of microprocessor IDT_P9035A_DST, control the data wire D+ of USB interface, D-voltage, mobile phone determines charge mode according to the data of data wire D+, the D-voltage of USB interface.
2. induction type electric current as claimed in claim 1 and USB bimodulus charging control circuit realize method, it is characterized in that, when there being mobile phone to be charged by wireless charging device, charging current is when more than 1.3A, charging current is changed through resistance R24 and operational amplifier A ZV831 signal and is compared with size, high level is exported from the pin 1 of operational amplifier A ZV831, act on the base stage of transistor Q1, transistor Q1 is made to be in cut-off state, therefore the ISNS pin input of microprocessor IDT_P9035A_DST is low level signal, microprocessor IDT_P9035A_DST passes through internal calculation, make the GPIO4 pin output low level of microprocessor IDT_P9035A_DST, pass to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, the Enable Pin of this chip is that high level is effective, outfan 1 foot of output voltage stabilizing chip UP7534GMA5-15 does not export, cannot charge the phone；
When wireless charging electric current is when 0.25A 1.2A, charging current is through resistance R24, change through the signal of operational amplifier A ZV831, size compares, from the outfan 1 foot output low level of operational amplifier A ZV831, act on the base stage of transistor Q1, transistor Q1 turns on, transistor Q1 collector voltage raises, the high level signal of transistor Q1 colelctor electrode is transferred to the ISNS pin of microprocessor IDT_P9035A_DST, calculated by the internal processes of microprocessor IDT_P9035A_DST, process, the GPIO4 pin output high level of microprocessor IDT_P9035A_DST, pass to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, output voltage stabilizing chip UP7534GMA5-15 normal operation, outfan 1 foot of this chip has voltage to export, can charge the phone；
Microprocessor IDT_P9035A_DST is calculated by internal processes simultaneously, its GPIO2 pin output low level, the grid of Q3 it is added to by a resistance, making Q3 be in cut-off state, power Vcc need to through resistance R49, R47 and R48 dividing potential drop, to the data wire D+ of charge mobile phone USB interface, D-voltage signal, charge mobile phone detects the data signal of USB interface, makes mobile phone charging current be maintained at 500mA；
When wireless charging electric current is when below 0.15A, charging current is changed through the signal of R24 and operational amplifier A ZV831, size compares, from the outfan 1 foot output low level of operational amplifier A ZV831, act on the base stage of Q1, Q1 turns on, wireless charging electric current is by the operational amplifier A ZV831 signal converted, it is transferred to the ISNS pin of microprocessor IDT_P9035A_DST, microprocessor IDT_P9035A_DST passes through internal calculation, make the GPIO4 pin output high level of microprocessor IDT_P9035A_DST, it is given to Enable Pin 4 foot of output voltage stabilizing chip UP7534GMA5-15, the Enable Pin of this chip is that high level is effective, therefore output voltage stabilizing chip UP7534GMA5-15 energy normal operation, outfan 1 foot of this chip has voltage to export, can charge the phone, microprocessor IDT_P9035A_DST passes through internal calculation simultaneously, the GPIO2 pin output high level of microprocessor IDT_P9035A_DST, the grid of IGCT Q3 it is added to by a resistance, make IGCT Q3 in the conduction state, electric current is without resistance R47, power Vcc is only through resistance R49 and R48 dividing potential drop, it is added to the data wire D+ of charge mobile phone USB interface, D-, charge mobile phone detects the data signal of USB interface, how many battery electric quantities according to mobile phone charges, make mobile phone charging current unrestricted；
Utilizing the device that USB interface is charged is mobile phone to be charged, mobile phone to be charged is by detecting the data wire D+ of USB interface, D-voltage, identify the charge mode of USB interface, being judged whether current state and state before be the same by microprocessor IDT_P9035A_DST, when sensing that wireless charging electric current changes, the GPIO4 pin of microprocessor exports low-voltage and postpones 2 seconds, make output voltage stabilizing chip UP7534GMA5-15 restart, USB output is resetted；
By operational amplifier A ZV831 and low resistance resistance R24, electric current change is transferred to voltage, real monitoring when the signal of its ISNS pin is carried out by microprocessor IDT_P9035A_DST, according to the voltage data monitored, microprocessor IDT_P9035A_DST program is calculated, then, high level is exported by GPIO4 foot, control Enable Pin both pin 4 of output voltage stabilizing chip UP7534GMA5-15, now output voltage stabilizing chip UP7534GMA5-15 normal operation, outfan 1 foot of this chip has voltage to export, and unnecessary electric current is fed to USB interface；
Wired charging available current=power supply adaptor for induced current wireless charging device electric current；
When the electric current that the USB interface of described USB control circuit exports is only 500mA, wired charging is in low speed charge mode；
When described current-sensing circuit is not connected with wireless charger circuit, or when wireless charger circuit does not carry out the state of wireless charging, wired charging is in fullcharging charge mode；
When the electric current that the USB interface of described USB control circuit exports is less than 500mA, this time is detected current signal by microprocessor IDT_P9035A_DST according to ISNS pin, make its GPIO4 foot output low level, control Enable Pin and the pin 4 of output voltage stabilizing chip UP7534GMA5-15, output voltage stabilizing chip UP7534GMA5-15 is made to quit work, outfan and the pin 1 of this chip do not have voltage to export, and thus interrupt wired charging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2538105Y (en) * | 2002-04-19 | 2003-02-26 | 范仕良 | Wired and wireless two-in-one telephone set |
| CN103545880A (en) * | 2013-09-27 | 2014-01-29 | 深圳天珑无线科技有限公司 | Wireless charging position calibration method and electronic equipment |
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| KR101255904B1 (en) * | 2011-05-04 | 2013-04-17 | 삼성전기주식회사 | Power charging apparatus and charging method for both wireline and wireless |
| KR20130098521A (en) * | 2012-02-28 | 2013-09-05 | 삼성전자주식회사 | Wireless power providing device and method for controlling thereof |
| KR101404013B1 (en) * | 2012-10-26 | 2014-06-13 | 전자부품연구원 | Mobile apparatus including wireless power transmission apparatus and wireless charging system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2538105Y (en) * | 2002-04-19 | 2003-02-26 | 范仕良 | Wired and wireless two-in-one telephone set |
| CN103545880A (en) * | 2013-09-27 | 2014-01-29 | 深圳天珑无线科技有限公司 | Wireless charging position calibration method and electronic equipment |
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