CN205335883U - Dull and stereotyped three routes charging circuit - Google Patents
Dull and stereotyped three routes charging circuit Download PDFInfo
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- CN205335883U CN205335883U CN201521071405.0U CN201521071405U CN205335883U CN 205335883 U CN205335883 U CN 205335883U CN 201521071405 U CN201521071405 U CN 201521071405U CN 205335883 U CN205335883 U CN 205335883U
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Abstract
The utility model provides a dull and stereotyped three routes charging circuit, including DC interface battery charging unit, USB interface battery charging unit, docking interface battery charging unit and switch unit, DC interface battery charging unit includes the first signal of listening, the first signal of listening is used for detecting the DC interface and whether has DC interface power input, the USB interface unit includes that the second listens the signal, the second is listened the signal and is used for detecting the USB interface and whether has the USB interface power input, docking interface battery charging unit includes that the third listens the signal, the third is listened the signal and is used for detecting the docking interface and whether has docking interface power input, the switch unit is through judging the first signal of listening, the signal is listened to the second and the signal control DC interface is listened to the third, the priority of USB interface and docking interface, in order to realize the charging control to the flat board. The utility model discloses possess that the DC interface charges, the USB interface charges and docking interface mode, and control three kinds of charge mode's priority to avoid burning out the machine, reduce the machine trouble, in order to expand dull and stereotyped application scenario.
Description
Technical field
This utility model relates to circuit engineering field, particularly relates to a kind of flat board No. three charging circuit。
Background technology
Owing to current panel size is increasing, and flat board is also towards the application development of notebook aspect, and flat board is not only used for entertaining, it may also be used for office。Large scale flat board adds docking keyboard, it is possible to use as notes are original。Use additionally, docking keyboard is possible not only to work as keyboard, it is also possible to charge to flat board。Integrated power supply translation function inside docking keyboard, it is possible to the voltage after conversion is exported docking pin。Thus to consider that USB charges, three kinds of chargings that DCIN charges and docking charges, thus to consider the issue of priority of three kinds of charging modes, switching problem etc., deal with more complicated, it is easy to cause burning out equipment and causing mechanical disorder。
Therefore, it is badly in need of a kind of charging circuit that can coordinate three kinds of charging modes at present, thus the problem avoiding burning out machine and causing mechanical disorder。
Utility model content
The purpose of this utility model is in that to provide a kind of flat board No. three charging circuit, this flat board No. three charging circuit can have the charging of DC interface, USB interface charging and Docking interface mode, and control the priority of three kinds of charging modes, thus avoiding burning out machine, reduce mechanical disorder, to expand the application scenario of flat board。
For solving above-mentioned technical problem, utility model adopts technical scheme as described below。A kind of flat board No. three charging circuit, including DC interface charhing unit, USB interface charhing unit, Docking interface charhing unit and switch unit, described DC interface charhing unit includes the first detection signal, described first detection signal is used for detecting whether DC interface has DC interface power to input, described usb interface unit includes the second detection signal, described second detection signal is used for detecting whether USB interface has USB interface power supply to input, described Docking interface charhing unit includes the 3rd detection signal, described 3rd detection signal is used for detecting whether Docking interface has Docking interface power to input, described switch unit is by judging the first detection signal, second detection signal and the 3rd detection signal control DC interface charhing unit in the charging circuit of described flat board No. three, USB interface charhing unit, the priority relationship of Docking interface charhing unit, to realize the charging of flat board is controlled。
Preferably, described priority relationship is that Docking interface charhing unit is higher than described DC interface charhing unit, and described DC interface charhing unit is higher than USB interface charhing unit。
Preferably, described DC interface charhing unit includes the first detecting unit and DC interface power, first pin of described first detecting unit is used for connecting DC interface power, second pin ground connection, 3rd pin connects the first detection signal, and when the first pin of described first detecting unit connects DC interface power, described first detection signal is output as high level, when described first detecting unit is not connected with DC interface power, described first detection signal is output as low level。
Preferably, described DC interface charhing unit also includes voltage conversion unit, and described power conversion unit is used for connecting described DC interface power and described DC interface power being changed 5V voltage exporting, and 5V voltage connects described switch unit。
Preferably, described USB interface charhing unit includes the second detecting unit and USB interface power supply, first pin of described second detecting unit is used for connecting USB interface power supply, 5th pin ground connection, 4th pin connects the second detection signal, when the first pin of described second detecting unit connects USB interface power supply, and described second detection signal output high level, when described second detecting unit connects USB interface device, described second detection signal output low level。
Preferably, described Docking interface charhing unit includes the 3rd detecting unit and Docking interface power, the ground connection while that first pin of the 3rd detecting unit being to the 4th pin, 5th pin connects the 3rd detection signal, 8th pin connects the 4th detection signal, 9th pin is simultaneously connected with Docking interface power to the 12nd pin, when the 9th pin of the 3rd detecting unit connects Docking interface power to the 12nd pin, described 3rd detection signal output high level, described 4th detection signal output low level, when described 3rd detecting unit connects Docking interface equipment, described 3rd detection signal output low level, described 4th detection signal output high level。
11, preferably, described switch unit includes the first metal-oxide-semiconductor, and described 4th detection signal connects the grid of described first metal-oxide-semiconductor, the source ground of described first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor is simultaneously connected with the second metal-oxide-semiconductor, the source electrode of the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor connects described first detection signal, and the drain electrode of the second metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the first control unit, 4th pin, 3rd pin of the 8th pin and the second control unit, 4th pin, 8th pin, the grid of the 5th metal-oxide-semiconductor passes through the first resistance eutral grounding, and the drain electrode of the 5th metal-oxide-semiconductor connects the drain electrode of the second metal-oxide-semiconductor and the grid of the 6th metal-oxide-semiconductor, and the drain electrode of the 6th metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the 3rd control unit, 4th pin, 3rd pin of the 8th pin and the 4th control unit, 4th pin, 8th pin, the first pin of the 3rd control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, the first pin of the 4th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with USB interface power supply, the first pin of the first control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with 5V voltage, the first pin of the second control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, and the 3rd detection signal connects the grid of the 3rd metal-oxide-semiconductor, the source ground of the 3rd metal-oxide-semiconductor, and the drain electrode of the 3rd metal-oxide-semiconductor is simultaneously connected with the source electrode of the 4th metal-oxide-semiconductor and the 4th pin of the 5th control unit, 4th pin of the 8th pin and the 6th control unit, 8th pin, the grid of the 4th metal-oxide-semiconductor connects the drain electrode of the 7th metal-oxide-semiconductor, and the grid of the 7th metal-oxide-semiconductor connects the 4th detection signal, the source ground of the 7th metal-oxide-semiconductor, and the drain electrode of the 4th metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the 5th control unit, 3rd pin of the 6th control unit and one end of the second resistance, the other end of the second resistance is simultaneously connected with the 4th pin of the 5th control unit, 4th pin of the 8th pin and the 6th control unit, 8th pin, the first pin of the 5th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, the first pin of the 6th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with Docking interface power。
Preferably, the 4th pin of described first control unit, the 8th pin pass through the first capacity earth, and the 4th pin of the second control unit, the 8th pin pass through the second capacity earth。
Preferably, it is also connected with the 3rd resistance between grid and the 3rd detection signal of described 3rd metal-oxide-semiconductor, 3rd detection signal is also simultaneously connected with one end of the 4th resistance one end and the 5th resistance and one end ground connection of the 5th resistance, and one end of the 4th resistance connects Docking interface power。
Preferably, the grid of described first metal-oxide-semiconductor is simultaneously connected with one end of the 6th resistance, the 7th resistance and the 8th resistance, and the 7th other end ground connection of resistance, the other end of the 6th resistance connects the negative electrode of the first diode, the anode of the first diode connects DC interface power, the other end of the 8th resistance connects the negative electrode of the second diode, and the anode of the second diode connects USB interface power supply。
Advantageous Effects of the present utility model is in that: this flat board No. three charging circuit includes DC interface charhing unit, USB interface charhing unit, Docking interface charhing unit and switch unit, and first detection signal be used for detecting whether DC interface has DC source to access, second detection signal is used for detecting whether USB interface has USB interface power supply to input, 3rd detection signal is used for detecting whether Docking interface has Docking interface power to input, switch unit is according to the first detection signal, second detection signal and the 3rd detection signal control DC interface charhing unit, USB interface charhing unit, the priority relationship of Docking interface charhing unit, to realize the charging of flat board is controlled。This flat board No. three charging circuit has the charging of DC interface, USB interface charging and Docking interface mode and the priority of three kinds of charging modes of control, thus avoiding burning out machine, reduces mechanical disorder, to expand the application scenario of flat board。
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the DC interface charhing unit of preferred embodiment。
Fig. 2 is the circuit diagram of the USB interface charhing unit of preferred embodiment。
Fig. 3 is the circuit diagram of the Docking interface charhing unit of preferred embodiment。
Fig. 4 is the circuit diagram of the switch unit Part I of preferred embodiment。
Fig. 5 is the circuit diagram of the switch unit Part II of preferred embodiment。
Fig. 6 is the circuit diagram of the switch unit Part III of preferred embodiment。
Detailed description of the invention
For making those of ordinary skill in the art be more clearly understood from the purpose of utility model, technical scheme and advantage, below in conjunction with drawings and Examples, utility model is further elaborated。
A kind of flat board No. three charging circuit 1, including DC interface charhing unit 10, USB interface charhing unit 20, Docking interface charhing unit 30 and switch unit 40。DC interface charhing unit 10 includes the first detection signal DC-DET, first detection signal DC-DET is used for detecting whether DC interface has DC supply input, usb interface unit 20 includes the second detection signal USB-ID-CONN, second detection signal USB-ID-CONN is used for detecting whether USB interface has DC supply input, Docking interface charhing unit 30 includes the 3rd detection signal Docking-DET, 3rd detection signal Docking-DET is used for detecting whether Docking interface has Docking interface power to input, switch unit 40 is by judging the first detection signal DC-DET, second detection signal USB-ID-CONN and the 3rd detection signal Docking-DET controls DC interface charhing unit 10 in flat board No. three charging circuit 1, USB interface charhing unit 20, the priority relationship of Docking interface charhing unit 30, to realize the charging of flat board is controlled。
With reference to shown in Fig. 1, it is the circuit diagram of DC interface charhing unit of preferred embodiment。In the present embodiment, DC interface charhing unit 10 includes the first detecting unit 11 and DC interface power DCIN, first pin of the first detecting unit 11 is used for connecting DC interface power DCIN, second pin ground connection, 3rd pin connects the first detection signal DC-DET, when the first pin of the first detecting unit 11 connects DC interface power DCIN, first detection signal DC-DET is output as high level, when the first detecting unit 11 is not connected with DC interface power DCIN, the first detection signal DC-DET is output as low level。Preferably, in the present embodiment, the first fuse Fu1 between the first pin of DC interface power DCIN and the first detecting unit 11, it is also associated with, the safety that this first fuse Fu1 charges for protecting this DC interface。
Preferably, in certain embodiments, DC interface charhing unit 10 also includes voltage conversion unit 12, and power conversion unit 12 is used for connecting DC interface power DCIN and DC interface power DCIN being changed 5V voltage exporting, and this 5V voltage connection switching unit 40 is to meet flat board internal electric source needs。In the present embodiment, DC interface power DCIN can connect the DC source between 5V～19V, and realizes voltage conversion by voltage conversion unit 12。This voltage conversion unit 12 can be meet permutator power supply on the market。
With reference to shown in Fig. 2, it is advantageous to the circuit diagram of the USB interface charhing unit of embodiment。USB interface charhing unit 20 includes the second detecting unit 21 and USB interface power supply VUSB-CONN-FUSE, first pin of the second detecting unit 21 is used for connecting USB interface power supply VUSB-CONN-FUSE, 5th pin ground connection, 4th pin connects the second detection signal USB-ID-CONN, when the first pin of the second detecting unit 21 connects USB interface power supply VUSB-CONN-FUSE, second detection signal USB-ID-CONN exports high level, when the second detecting unit 21 connects USB interface power supply VUSB-CONN-FUSE, second detection signal USB-ID-CONN exports high level。In the present embodiment, first pin of the second detecting unit 21 connects USB interface device, during such as mouse, keyboard etc., second detection signal USB-ID-CONN is output as low level, setting by this second detection signal USB-ID-CONN can so that distinguishing the state that current USB interface connects, and being namely used for distinguishing this USB interface is connect USB interface power supply VUSB-CONN-FUSE or USB interface device。Preferably, in the present embodiment, the second fuse Fu2 between the first pin of USB interface power supply VUSB-CONN-FUSE and the second detecting unit 21, it is also associated with, the safety that this second fuse Fu2 charges for protecting this USB interface。
With reference to shown in Fig. 3, it is advantageous to the circuit diagram of the Docking interface charhing unit of embodiment。Docking interface charhing unit 30 includes the 3rd detecting unit 31 and Docking interface power DOCKING_CHG, the ground connection while that first pin of the 3rd detecting unit 31 being to the 4th pin, 5th pin connects the 3rd detection signal Docking-DET, 8th pin connects the 4th detection signal BKIN-DET, 9th pin is simultaneously connected with Docking interface power DOCKING_CHG to the 12nd pin, when the 9th pin of the 3rd detecting unit 31 connects Docking interface power DOCKING_CHG to the 12nd pin, 3rd detection signal Docking-DET exports high level, 4th detection signal BKIN-DET output low level, when the 3rd detecting unit 31 is not connected with Docking interface power DOCKING_CHG, 3rd detection signal Docking-DET output low level, 4th detection signal BKIN-DET exports high level。Setting by the 3rd detection signal Docking-DET, it is possible to distinguish Docking interface connection state, is used for judging to connect Docking interface power DOCKING_CHG or insert key disc apparatus。In the present embodiment, when Docking interface insert key disc apparatus, the 3rd detection signal Docking-DET output low level, the 4th detection signal BKIN-DET exports high level。
With reference to shown in Fig. 4 to Fig. 6, it is advantageous to the circuit diagram of the switch unit of embodiment。Switch unit 40 includes the first metal-oxide-semiconductor QA1, and the 4th detection signal BKIN-DET connects the grid of the first metal-oxide-semiconductor QA1, the source ground of the first metal-oxide-semiconductor QA1, and the drain electrode of the first metal-oxide-semiconductor QA1 is simultaneously connected with the second metal-oxide-semiconductor QA2, the source electrode of the 5th metal-oxide-semiconductor QA5 and the 6th metal-oxide-semiconductor QA6, the grid of the second metal-oxide-semiconductor QA2 connects the first detection signal DC-DET, and the drain electrode of the second metal-oxide-semiconductor QA2 is simultaneously connected with the 3rd of the first control unit U1, 4th, the 3rd of 8th pin and the second control unit U2, 4th, 8th pin, the grid of the 5th metal-oxide-semiconductor QA5 passes through the first resistance R1 ground connection, and the drain electrode of the 5th metal-oxide-semiconductor QA5 connects the drain electrode of the second metal-oxide-semiconductor QA2 and the grid of the 6th metal-oxide-semiconductor QA6, and the drain electrode of the 6th metal-oxide-semiconductor QA6 is simultaneously connected with the 3rd of the 3rd control unit U3, 4th, the 3rd of 8th pin and the 4th control unit U4, 4th, 8th pin, first pin of the 3rd control unit U3, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan OUT, first pin of the 4th control unit U4, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with USB interface power supply VUSB-CONN-FUSE, first pin of the first control unit U1, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with 5V voltage, first pin of the second control unit U2, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan OUT, 3rd detection signal Docking-DET connects the grid of the 3rd metal-oxide-semiconductor QA3, the source ground of the 3rd metal-oxide-semiconductor QA3, the drain electrode of the 3rd metal-oxide-semiconductor QA3 is simultaneously connected with the source electrode of the 4th metal-oxide-semiconductor QA4 and the 4th pin of the 5th control unit U5, 4th pin of the 8th pin and the 6th control unit U6, 8th pin, the grid of the 4th metal-oxide-semiconductor QA4 connects the drain electrode of the 7th metal-oxide-semiconductor QA7, the grid of the 7th metal-oxide-semiconductor QA7 connects the 4th detection signal BKIN-DET, the source ground of the 7th metal-oxide-semiconductor QA7, the drain electrode of the 4th metal-oxide-semiconductor QA4 is simultaneously connected with the 3rd pin of the 5th control unit U5 and one end of the 3rd pin of the 6th control unit U6 and the second resistance R2, and the other end of the second resistance R2 is simultaneously connected with the 4th pin of the 5th control unit U5, 4th pin of the 8th pin and the 6th control unit U6, 8th pin, first pin of the 5th control unit U5, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan OUT, first pin of the 6th control unit U6, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with Docking interface power DOCKING_CHG。Preferably, in the present embodiment, the 4th pin of the first control unit U1, the 8th pin are simultaneously by the first electric capacity C1 ground connection, and the 4th pin of the second control unit U2, the 8th pin pass through the second electric capacity C2 ground connection。
Preferably, in the present embodiment, it is also connected with the 3rd resistance R3 between grid and the 3rd detection signal DOCKING_DET of the 3rd metal-oxide-semiconductor QA3,3rd detection signal DOCKING_DET is also simultaneously connected with one end of the 4th resistance R4 one end and the 5th resistance R5, and the 5th one end ground connection of resistance R5, one end of the 4th resistance R4 connects Docking interface power DOCKING_CHG。By this set, under flat board off-mode, 3rd detection signal DOCKING_DET is connected by the 4th resistance R4 and Docking interface power DOCKING_CHG, even if in the power-offstate, 3rd detection signal DOCKING_DET still remains high level, realizes according to this to be charged by Docking interface at off-mode。
Preferably, in the present embodiment, the grid of the first metal-oxide-semiconductor QA1 is simultaneously connected with one end of the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, and the 7th other end ground connection of resistance R7, the other end of the 6th resistance R6 connects the negative electrode of the first diode D1, the anode of the first diode D1 connects 5V voltage, and the other end of the 8th resistance R8 connects the negative electrode of the second diode D2, and the anode of the second diode D2 connects USB interface power supply VUSB-CONN-FUSE。When Docking interface does not connect charging Docking interface power DOCKING_CHG, BKIN_DET is high level, namely the grid of the first metal-oxide-semiconductor QA1 is high level, the now drain electrode of the first metal-oxide-semiconductor QA1 and source conduction, source ground due to the first metal-oxide-semiconductor QA1, therefore flag bit DC_Disable is low level, therefore the source electrode of the second metal-oxide-semiconductor QA2, the 5th metal-oxide-semiconductor QA5 and the six metal-oxide-semiconductor QA6 is low level, and such USB interface power supply VUSB_CONN_FUSE and DC interface power can be charged。In addition, be connected to USB interface power supply VUSB-CONN-FUSE and the first diode D1 by the second diode D2, the 8th resistance R8, the 6th resistance R6, the 7th resistance R7 are connected to 5V voltage, to ensure that BKIN_DET is for high level, therefore in the power-offstate, without the charging having influence on USB interface power supply VUSB_CONN_FUSE and 5V voltage。
In the present embodiment, when Docking interface connects Docking interface power DOCKING_CHG, 4th detection signal BKIN_DET is low level, 3rd detection signal DOCKING_DET is high level, therefore the grid of the 7th metal-oxide-semiconductor QA7 is low level, the source electrode of the 7th metal-oxide-semiconductor QA7 and drain electrode cut-off, therefore the grid of the 4th metal-oxide-semiconductor QA4 is high level。Owing to the 3rd detection signal DOCKING_DET is high level, therefore the grid of the 3rd metal-oxide-semiconductor QA3 is high level, the drain electrode of the 3rd metal-oxide-semiconductor QA3 and source conduction。Owing to the grid of the 4th metal-oxide-semiconductor QA4 is high level, the therefore drain electrode of the 4th metal-oxide-semiconductor QA4 and source conduction。Source ground due to the 3rd metal-oxide-semiconductor QA3, and the 3rd metal-oxide-semiconductor QA3 and the four metal-oxide-semiconductor QA4 be both turned on, therefore the 4th pin of the 5th control unit U5 and the six control unit U6 and the 8th pin are low level simultaneously, therefore five control unit U5 and the six control unit U6 conductings, therefore Docking interface power DOCKING_CHG connects outfan OUT, realizes according to this being charged by Docking interface。Source electrode and drain electrode cut-off due to the first metal-oxide-semiconductor QA1, flag bit DC_Disable is high level, the source electrode of the 6th metal-oxide-semiconductor QA6 is high level, therefore the 3rd control unit U3 and the four control unit U4 all cannot turn on, therefore, USB interface power supply VUSB_CONN_FUSE can not be communicated to outfan OUT, and such USB interface cannot realize charging。Equally, owing to flag bit DC_Disable is high level, second metal-oxide-semiconductor QA2, the 5th metal-oxide-semiconductor QA5 source electrode be high level, such first control unit U1 and the second control unit U2 the three, the four, the 8th pin are high level, therefore, first control unit U1 and the second control unit U2 all cannot turn on, and therefore the 5V voltage of DC interface conversion output cannot be communicated to outfan OUT, and therefore DC interface cannot realize charging。Due to when Docking interface connection Docking interface power DOCKING_CHG is charged, USB interface power supply VUSB_CONN_FUSE and DC interface power DCIN all cannot be carried out charging, realizes the priority priority higher than USB interface and DC interface of Docking interface according to this。
Simultaneously, when Docking interface connects Docking interface keyboard, the grid of the 3rd metal-oxide-semiconductor QA3 is low level, the drain electrode of the 3rd metal-oxide-semiconductor QA3 and source electrode cut-off, the grid of the 4th metal-oxide-semiconductor QA4 is low level, drain electrode and source electrode cut-off, 4th pin and the 8th pin of such 5th control unit U5 and the six control unit U6 are high level simultaneously, 5th control unit U5 and the six control unit U6 can not turn on, therefore Docking interface power DOCKING_CHG does not turn on to outfan OUT, to prevent from pouring in down a chimney phenomenon。
When Docking interface is not connected with Docking interface power DOCKING_CHG, 4th detection signal BKIN_DET is high level, flag bit DC_Disable is low level, when DC interface power DCIN inserts, first detection signal DC-DET is high level, therefore, the grid of the first metal-oxide-semiconductor QA1 is high level, the source electrode of the first metal-oxide-semiconductor QA1 and drain electrode conducting, therefore at the 3rd of the first control unit U1 and the second control unit U2, 4th, 8th pin is low level, first control unit U1 and the second control unit U2 conducting, at this moment the 5V voltage realizing DC interface power DCIN conversion output is communicated to outfan OUT, to realize the charging of DC interface。Simultaneously, owing to BKIN_DET is high level, flag bit DC_Disable is low level, the source electrode of the 5th metal-oxide-semiconductor QA5 and drain electrode conducting, therefore the grid of the 6th metal-oxide-semiconductor QA6 is low level, the drain electrode of the 6th metal-oxide-semiconductor QA6 and source electrode cut-off, therefore the three, the four, the 8th pins of the 3rd control unit U3 and the four control unit are high level, 3rd control unit U3 and the four control unit U4 cannot turn on, such USB interface power supply VUSB_CONN_FUSE can not be communicated to outfan OUT, and such USB interface cannot realize charging。Therefore when Docking interface is not connected with Docking interface power DOCKING_CHG, the charging priority of the DC interface power DCIN charging priority higher than USB interface power supply VUSB_CONN_FUSE。
When DC interface and Docking interface are not all charged, and during USB interface connection USB interface power supply VUSB_CONN_FUSE, owing to the grid of the 6th metal-oxide-semiconductor QA6 connects USB interface power supply VUSB_CONN_FUSE by the 9th resistance R9, therefore the grid of the 6th metal-oxide-semiconductor QA6 is high level, the drain electrode of the 6th metal-oxide-semiconductor QA6 and source conduction, and the 3rd control unit U3 and the four control unit U4 the 3rd, 4th, 8th pin is low level, 3rd control unit U3 and the four control unit U4 conducting, therefore USB interface power supply VUSB_CONN_FUSE connects outfan OUT, namely the charging of USB interface is realized。
The charging of DC interface, USB interface charging and three kinds of charging modes of Docking interface are had by this flat board No. three charging circuit 1, and control the priority relationship between DC interface charhing unit 10, USB interface charhing unit 20, Docking interface charhing unit 30 by switch unit 40, namely Docking interface charhing unit 30 is higher than DC interface charhing unit 10, DC interface charhing unit 10 is higher than USB interface charhing unit 20, thus avoiding burning out machine, reduce mechanical disorder, to expand the application scenario of flat board。
The foregoing is only the preferred embodiment of utility model, but not utility model is done any pro forma restriction。Those skilled in the art can impose various equivalent change and improvement, all equivalent variations done in right or modification on the basis of above-described embodiment, all should fall within the protection domain of utility model。
Claims (10)
1. flat board No. three charging circuit, it is characterized in that: include DC interface charhing unit, USB interface charhing unit, Docking interface charhing unit and switch unit, described DC interface charhing unit includes the first detection signal, described first detection signal is used for detecting whether DC interface has DC interface power to input, described usb interface unit includes the second detection signal, described second detection signal is used for detecting whether USB interface has USB interface power supply to input, described Docking interface charhing unit includes the 3rd detection signal, described 3rd detection signal is used for detecting whether Docking interface has Docking interface power to input, described switch unit is by judging the first detection signal, second detection signal and the 3rd detection signal control DC interface charhing unit in the charging circuit of described flat board No. three, USB interface charhing unit, the priority relationship of Docking interface charhing unit, to realize the charging of flat board is controlled。
2. flat board No. three as claimed in claim 1 charging circuit, it is characterised in that: described priority relationship is that Docking interface charhing unit is higher than described DC interface charhing unit, and described DC interface charhing unit is higher than USB interface charhing unit。
3. flat board No. three as claimed in claim 2 charging circuit, it is characterized in that: described DC interface charhing unit includes the first detecting unit and DC interface power, first pin of described first detecting unit is used for connecting DC interface power, second pin ground connection, 3rd pin connects the first detection signal, when the first pin of described first detecting unit connects DC interface power, described first detection signal is output as high level, when described first detecting unit is not connected with DC interface power, described first detection signal is output as low level。
4. flat board No. three as claimed in claim 3 charging circuit, it is characterized in that: described DC interface charhing unit also includes voltage conversion unit, described power conversion unit is used for connecting described DC interface power and described DC interface power being changed 5V voltage exporting, and 5V voltage connects described switch unit。
5. flat board No. three as claimed in claim 2 charging circuit, it is characterized in that: described USB interface charhing unit includes the second detecting unit and USB interface power supply, first pin of described second detecting unit is used for connecting USB interface power supply, 5th pin ground connection, 4th pin connects the second detection signal, when the first pin of described second detecting unit connects USB interface power supply, described second detection signal output high level, when described second detecting unit connects USB interface device, described second detection signal output low level。
6. flat board No. three as claimed in claim 2 charging circuit, it is characterized in that: described Docking interface charhing unit includes the 3rd detecting unit and Docking interface power, the ground connection while that first pin of the 3rd detecting unit being to the 4th pin, 5th pin connects the 3rd detection signal, 8th pin connects the 4th detection signal, 9th pin is simultaneously connected with Docking interface power to the 12nd pin, when the 9th pin of the 3rd detecting unit connects Docking interface power to the 12nd pin, described 3rd detection signal output high level, described 4th detection signal output low level, when described 3rd detecting unit connects Docking interface equipment, described 3rd detection signal output low level, described 4th detection signal output high level。
7. flat board No. three as claimed in claim 6 charging circuit, it is characterized in that: described switch unit includes the first metal-oxide-semiconductor, described 4th detection signal connects the grid of described first metal-oxide-semiconductor, the source ground of described first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor is simultaneously connected with the second metal-oxide-semiconductor, the source electrode of the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor connects described first detection signal, and the drain electrode of the second metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the first control unit, 4th pin, 3rd pin of the 8th pin and the second control unit, 4th pin, 8th pin, the grid of the 5th metal-oxide-semiconductor passes through the first resistance eutral grounding, and the drain electrode of the 5th metal-oxide-semiconductor connects the drain electrode of the second metal-oxide-semiconductor and the grid of the 6th metal-oxide-semiconductor, and the drain electrode of the 6th metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the 3rd control unit, 4th pin, 3rd pin of the 8th pin and the 4th control unit, 4th pin, 8th pin, the first pin of the 3rd control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, the first pin of the 4th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with USB interface power supply, the first pin of the first control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with 5V voltage, the first pin of the second control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, and the 3rd detection signal connects the grid of the 3rd metal-oxide-semiconductor, the source ground of the 3rd metal-oxide-semiconductor, and the drain electrode of the 3rd metal-oxide-semiconductor is simultaneously connected with the source electrode of the 4th metal-oxide-semiconductor and the 4th pin of the 5th control unit, 4th pin of the 8th pin and the 6th control unit, 8th pin, the grid of the 4th metal-oxide-semiconductor connects the drain electrode of the 7th metal-oxide-semiconductor, and the grid of the 7th metal-oxide-semiconductor connects the 4th detection signal, the source ground of the 7th metal-oxide-semiconductor, and the drain electrode of the 4th metal-oxide-semiconductor is simultaneously connected with the 3rd pin of the 5th control unit, 3rd pin of the 6th control unit and one end of the second resistance, the other end of the second resistance is simultaneously connected with the 4th pin of the 5th control unit, 4th pin of the 8th pin and the 6th control unit, 8th pin, the first pin of the 5th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with outfan, the first pin of the 6th control unit, second pin, 5th pin, 6th pin and the 7th pin are simultaneously connected with Docking interface power。
8. flat board No. three as claimed in claim 7 charging circuit, it is characterised in that: the 4th pin of described first control unit, the 8th pin pass through the first capacity earth, and the 4th pin of the second control unit, the 8th pin pass through the second capacity earth。
9. flat board No. three as claimed in claim 7 charging circuit, it is characterized in that: between grid and the 3rd detection signal of described 3rd metal-oxide-semiconductor, be also connected with the 3rd resistance, 3rd detection signal is also simultaneously connected with one end of the 4th resistance one end and the 5th resistance, and the 5th one end ground connection of resistance, one end of the 4th resistance connects Docking interface power。
10. flat board No. three as claimed in claim 7 charging circuit, it is characterized in that: the grid of described first metal-oxide-semiconductor is simultaneously connected with one end of the 6th resistance, the 7th resistance and the 8th resistance, and the 7th other end ground connection of resistance, the other end of the 6th resistance connects the negative electrode of the first diode, the anode of the first diode connects DC interface power, the other end of the 8th resistance connects the negative electrode of the second diode, and the anode of the second diode connects USB interface power supply。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071405.0U CN205335883U (en) | 2015-12-18 | 2015-12-18 | Dull and stereotyped three routes charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521071405.0U CN205335883U (en) | 2015-12-18 | 2015-12-18 | Dull and stereotyped three routes charging circuit |
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| CN205335883U true CN205335883U (en) | 2016-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492934A (en) * | 2017-09-19 | 2017-12-19 | 上海丹焱信息科技有限公司 | A kind of electronic installation with power supply circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492934A (en) * | 2017-09-19 | 2017-12-19 | 上海丹焱信息科技有限公司 | A kind of electronic installation with power supply circuit |
| CN107492934B (en) * | 2017-09-19 | 2024-01-30 | 上海丹焱信息科技有限公司 | Electronic device with power supply circuit |
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