CN203859558U - Electronic equipment and external charging circuit thereof - Google Patents

Electronic equipment and external charging circuit thereof Download PDF

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Publication number
CN203859558U
CN203859558U CN201420209749.2U CN201420209749U CN203859558U CN 203859558 U CN203859558 U CN 203859558U CN 201420209749 U CN201420209749 U CN 201420209749U CN 203859558 U CN203859558 U CN 203859558U
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China
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module
switching tube
conduction terminal
output
input
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CN201420209749.2U
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Chinese (zh)
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蔡斌
余克球
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TCL Technology Electronics Huizhou Co Ltd
TCL Tongli Electronics Huizhou Co Ltd
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TCL Tongli Electronics Huizhou Co Ltd
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Abstract

The utility model discloses electronic equipment and an external charging circuit thereof. The external charging circuit comprises a DC voltage transformation module, a voltage stabilizing module, an external charging interface, a main control module, a first path module, a second path module and a detection module, wherein the main control module controls the on/off of the first path module by changing level signals at an on/off control end, so as to control the voltage stabilizing module to start or stop operating output; and when the external charging circuit is used for charging externally and the first path module is switched off, the second path module is switched on. When the external charging circuit thereof is charging externally under the starting-up state of the electronic equipment, the electronic equipment can be shut down, the circuit is switched to the second path module for conduction, and a battery is used for charging externally through the second path module. Therefore, the user can shut down the electronic equipment when the electronic equipment is not used in an external charging state, the battery electricity consumption of the internal system of the electronic equipment is cut off, and the electricity consumption of the battery is completely used for charging externally, so as to avoid the waste of battery electricity.

Description

Electronic equipment and external charging circuit thereof
Technical field
The utility model relates to charging technique field, particularly a kind of electronic equipment and external charging circuit thereof.
Background technology
Along with popularizing of portable set and smart mobile phone, increasing portable product all possesses external charge function.Current portable set is realized the external circuit charging as shown in Figure 1, mainly comprise direct current transformation module 300, Voltage stabilizing module 400, main control module 500 and two switching tubes (Q11 and Q10), main control module 500 is for controlling the open and close machine of portable set and the startup of this circuit and closing, and this circuit can be by battery 100 power supplies and adapter 200 power supplies.As can be seen from Figure 1, no matter be battery 100 power supplies or adapter 200 power supplies, electric current is all by after direct current transformation module 300, and the built-in system power supply of portable set is exported on a road through Voltage stabilizing module 400, and another road outputs to 600 pairs of outside equipment charges of external charging inlet; So current portable set, when externally charging, can keep open state; Even when external charging without using portable set, also to be kept start, when this just causes externally charging (adopting the electric weight of portable set self battery 100 externally to charge) under battery mode, in the electric weight that battery 100 consumes, a part is consumed by self system standby, the electric weight that battery 100 consumes, not all for external charging, causes the electric weight waste of battery 100.
Utility model content
Main purpose of the present utility model is for providing a kind of electronic equipment and external charging circuit thereof, is intended to solve that electronic equipment need keep start when external charging and the waste problem that causes battery electric quantity.
The utility model proposes a kind of external charging circuit of electronic equipment, comprise direct current transformation module, Voltage stabilizing module, external charging inlet, main control module, the first channel module, alternate path module and detection module, wherein:
Described the first channel module comprises first input end for connecting described electronic equipment internal power supply, for connecting second input in externally fed source, the first output being connected with the input of described direct current transformation module, the second output being connected with the Enable Pin of described Voltage stabilizing module, the break-make control end being connected with described main control module and the control output end being connected with described alternate path module;
Described alternate path module comprises the input for connecting described electronic equipment internal power supply, the output being connected with the input of described direct current transformation module, the first control input end being connected with the control output end of described the first channel module and the second control input end being connected with described detection module;
The output of described direct current transformation module connects the input of described Voltage stabilizing module, the built-in system power supply that described Voltage stabilizing module output output voltage is described main control module and described electronic equipment; The output that described external charging inlet connects described direct current transformation module forms external charging path; Described detection module is connected on described external charging path, detects Yes/No electric current on described external charging path, and when electric current being detected, exports Continuity signal to described alternate path module;
The level signal of described main control module by changing described break-make control end to be to control the conducting/disconnection of described the first channel module, thereby control described Voltage stabilizing module start/stop work output; When externally charging and described the first channel module disconnect, the conducting of described alternate path module.
Preferably, also comprise the current-limiting protection module being connected between described direct current transformation module output and described detection module.
Preferably, described the first channel module comprises the first switching tube, second switch pipe and the 3rd switching tube;
The first conduction terminal of described the first switching tube is the first input end of described the first channel module, the second conduction terminal of described the first switching tube is the control output end of described the first channel module, the second conduction terminal of described the first switching tube connects the first conduction terminal of described second switch pipe, the second conduction terminal of described second switch pipe is the second input of described the first channel module, and the second conduction terminal of described second switch pipe connects the first conduction terminal of described the 3rd switching tube; The first conduction terminal of described the first switching tube connects its trigger end through a resistance, and the first conduction terminal of described the 3rd switching tube connects its trigger end through a resistance;
The second conduction terminal of described the 3rd switching tube is the first output of described the first channel module, and the first conduction terminal of described the 3rd switching tube is the second output of described the first channel module; The trigger end of the trigger end of described the first switching tube and described three switching tubes is connected the break-make control end of described the first channel module, the trigger end of described second switch pipe is for being connected with described externally fed source, and the trigger end of described second switch pipe is through a grounding through resistance.
Preferably, described alternate path module comprises the 4th switching tube and the 5th switching tube, the first conduction terminal of described the 4th switching tube is the input of described alternate path module, the second conduction terminal of described the 4th switching tube connects the first conduction terminal of described the 5th switching tube, and the second conduction terminal of described the 5th switching tube is the output of described alternate path module; The trigger end of described the 4th switching tube is the second control input end of described alternate path module, and the first conduction terminal of described the 4th switching tube connects its trigger end through a resistance; The trigger end of described the 5th switching tube is the first control input end of described alternate path module, and the trigger end of described the 5th switching tube is through a grounding through resistance.
Preferably, described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and the 5th switching tube are PMOS pipe;
The first conduction terminal of described the first switching tube, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of described second switch pipe, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of described the 3rd switching tube, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of described the 4th switching tube, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of described the 5th switching tube, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid.
Preferably, described detection module comprises sample resistance, voltage comparator and the 6th switching tube, described external charging inlet connects the output of described direct current transformation module through described sample resistance, the first input end of described voltage comparator connects the output of described direct current transformation module, the second input of described voltage comparator connects described external charging inlet, the output of described voltage comparator connects described the 6th switching tube trigger end, the first conduction terminal of described the 6th switching tube connects the second control input end of described alternate path module, the second conduction terminal ground connection of described the 6th switching tube.
Preferably, the first input end of described voltage comparator is electrode input end, the second input of described voltage comparator is negative input, described the 6th switching tube is NPN type triode, and the first conduction terminal of described the 6th switching tube, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.
Preferably, the first input end of described voltage comparator is negative input, the second input of described voltage comparator is electrode input end, described the 6th switching tube is positive-negative-positive triode, and the first conduction terminal of described the 6th switching tube, the second conduction terminal and trigger end are respectively emitter, collector electrode and base stage.
Preferably, described main control module comprises MCU and on/off circuit, the power end of described MCU connects the output of described Voltage stabilizing module, described on/off circuit comprises the 7th switching tube, switch switch, the first diode and the second diode, the first conduction terminal of described the 7th switching tube connects described break-make control end, and successively through the positive pole of described the first diode, the negative pole of the first diode, switch switch is to ground, the second conduction terminal ground connection of described the 7th switching tube, the trigger end of described the 7th switching tube connects the GPIO mouth of described MCU, the switching on and shutting down control end of described MCU is successively through the positive pole of described the second diode, the negative pole of the second diode and switch switch are to ground, the switching on and shutting down control end of described MCU also connects the output of described Voltage stabilizing module through a resistance, the power end of described MCU connects the output of described Voltage stabilizing module,
Described the 7th switching tube is NPN type triode, and the first conduction terminal of described the 7th switching tube, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.
The utility model further proposes a kind of electronic equipment, comprises external charging circuit as above.
Electronic equipment of the present utility model and external charging circuit thereof, battery can externally charge by two paths, when electronic equipment is started shooting, the first channel module conducting, battery externally charges by the first channel module; While externally charging under electronic equipment open state, electronic equipment can be shut down, circuit is switched to alternate path conducting, and battery externally charges by alternate path module.While making user not use electronic equipment under external charged state, electronic equipment can be shut down, close the consumption of electronic equipment internal system to battery electric quantity, make the electric weight of battery consumption all for external charging, avoid the waste of battery electric quantity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of external charging circuit in existing portable set;
Fig. 2 is the module diagram of the utility model external charging circuit the first embodiment;
Fig. 3 is the circuit diagram of the first scheme in the utility model external charging circuit the second embodiment;
Fig. 4 is the circuit diagram of alternative plan in the utility model external charging circuit the second embodiment;
Fig. 5 is the circuit diagram of main control module in the utility model external charging circuit.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figures 2 to 5, Fig. 2 is the module diagram of the utility model external charging circuit the first embodiment, Fig. 3 is the circuit diagram of the first scheme in the utility model external charging circuit the second embodiment, Fig. 4 is the circuit diagram of alternative plan in the utility model external charging circuit the second embodiment, and Fig. 5 is the circuit diagram of main control module in the utility model external charging circuit.
With reference to Fig. 2, the external charging circuit of the electronic equipment that the present embodiment proposes, comprise direct current transformation module 10, Voltage stabilizing module 20, external charging inlet 30, main control module 40, the first channel module 50, alternate path module 60 and detection module 70, the voltage of 10 pairs of inputs of direct current transformation module boosts or is depressurized to specific voltage (specific voltage is determined by direct current transformation module 10 internal components parameters) and exports.The first channel module 50 comprises for connecting the first input end 51 of this electronic equipment internal power supply (the present embodiment take the battery 100 of electronic equipment be example), be used for connecting the second input 52 of externally fed source (the present embodiment be take adapter 200 as example), the first output 53 being connected with the input of direct current transformation module 10, the second output 54 being connected with the Enable Pin EN of Voltage stabilizing module 20, the break-make control end 55 being connected with main control module 40 and the control output end 56 being connected with alternate path module 60, alternate path module 60 comprises the input 61 for connecting battery 100, the output 62 being connected with the input of direct current transformation module 10, the first control input end 63 being connected with the control output end 56 of the first channel module 50 and the second control input end 64 being connected with detection module 70, the output of direct current transformation module 10 connects the input of Voltage stabilizing module 20, and Voltage stabilizing module 20 output output voltages are the built-in system power supply of main control module 40 and electronic equipment, the output that externally charging inlet 30 connects direct current transformation module 10 forms external charging path, detection module 70 is connected on external charging path, detects Yes/No electric current on the path that externally charges, and when electric current being detected, exports Continuity signal to alternate path module 60, the level signal of main control module 40 by changing break-make control end 55 to be to control the conducting/disconnection of the first channel module 50, thereby control Voltage stabilizing module 20 start/stop work outputs, when externally charging and described the first channel module 50 disconnect, described alternate path module 60 conductings.
The operation principle of the present embodiment external charging circuit is as follows:
The control output end 56 of the first channel module 50 connects the first control input end 63 of alternate path module 60, and when the first channel module 50 conducting, Continuity signal is not exported in the control output end 56 of the first channel module 50 remains open alternate path module 60; When the first channel module 50 disconnects, the control output end 56 output Continuity signals of the first channel module 50 are to alternate path module 60.While externally charging, detection module 70 has detected electric current, and output Continuity signal is to alternate path module 60; While externally not charging, detection module 70 does not detect electric current, not output signal.Only at external charging circuit when external charging and the first channel module 50 disconnect, when the first channel module 50 and detection module 70 are exported Continuity signal to alternate path module 60 simultaneously, the 60 just conductings of alternate path module.
Electronic equipment is when open state externally charges, and main control module 40 work output Continuity signals make the first channel module 50 conductings, and the first channel module 50 is not exported Continuity signal to alternate path module 60, and alternate path module 60 is remained open.The second output 54 of the first channel module 50 is high level, and the Enable Pin EN of Voltage stabilizing module 20 is high level, Voltage stabilizing module 20 startup work.Battery 100 (when battery 100 power supply) or adapter 200 (when Payload attach fitting 200 power supply) through the first output 53 output voltages of the first channel module 50 to direct current transformation module 10, after direct current transformation module 10 transformations, respectively through Voltage stabilizing module 20 for electronic equipment internal system power supply and after testing module 70 to external charging inlet 30 to charge to being connected to the external equipment of external charging inlet 30.Detection module 70 detects has electric current to flow through always, continues output Continuity signal to alternate path module 60.
When electronic equipment externally charges under adapter 200 power supply states, electronic equipment is in open state, and main control module 40 work output Continuity signals are given the first channel module 50, the first channel module 50 conductings, and alternate path module 60 disconnects.
Electronic equipment is when open state externally charges by battery 100, electronic equipment is shut down, main control module 40 is not worked, main control module 40 is exported to the first channel module 50 without Continuity signal, the first channel module 50 disconnects, the first channel module 50 output Continuity signals are to alternate path module 60, alternate path module 60 receives the Continuity signal of the first channel module 50 outputs and the Continuity signal that detection module 70 sends simultaneously, 60 conductings of alternate path module, battery 100 is by second channel module 60, direct current transformation module 10, detection module 70 and externally charging inlet 30 are to charge to being connected to the external equipment of external charging inlet 30.
The external charging circuit of the present embodiment, battery 100 can externally charge by two paths, when electronic equipment is started shooting, the first channel module 50 conductings, battery 100 externally charges by the first channel module 50; While externally charging under electronic equipment open state, electronic equipment can be shut down, circuit is switched to alternate path conducting, and battery 100 externally charges by alternate path module 60.While making user not use electronic equipment under external charged state, electronic equipment can be shut down, close the consumption of electronic equipment internal system to battery 100 electric weight, make the electric weight of battery 100 consumption all for external charging, avoid the waste of battery 100 electric weight.
Further, in order to prevent the 10 externally chargings of overcurrent output of direct current transformation module, the external charging circuit of the present embodiment is connected with current-limiting protection module (not shown) between direct current transformation module 10 outputs and detection module 70.
Concrete, with reference to Fig. 3 and Fig. 4, in figure, the port of same numeral is what be connected.In the external charging circuit of the present embodiment, the first channel module 50 comprises the first switching tube Q1, second switch pipe Q2 and the 3rd switching tube Q3; The first conduction terminal of the first switching tube Q1 is the first input end 51 of the first channel module 50, the second conduction terminal of the first switching tube Q1 is the control output end 56 of the first channel module 50, the second conduction terminal of the first switching tube Q1 connects the first conduction terminal of second switch pipe Q2, the second conduction terminal of second switch pipe Q2 is the second input 52 of the first channel module 50, and the second conduction terminal of second switch pipe Q2 connects the first conduction terminal of the 3rd switching tube Q3; The first conduction terminal of the first switching tube Q1 connects its trigger end through a resistance R 1, and the first conduction terminal of the 3rd switching tube Q3 connects its trigger end through a resistance R 3; The second conduction terminal of the 3rd switching tube Q3 is that the first conduction terminal of the first output 53, the three switching tube Q3 of the first channel module 50 is the second output 54 of the first channel module 50; The trigger end of the trigger end of the first switching tube Q1 and the 3rd switching tube Q3 is connected the break-make control end 55 (also i.e. figure in ON/OFF) of the first channel module 50, the trigger end of second switch pipe Q2 is for being connected with adapter 200, and the trigger end of second switch pipe Q2 is through resistance R 2 ground connection.
Alternate path module 60 comprises the 4th switching tube Q4 and the 5th switching tube Q5, the first conduction terminal of the 4th switching tube Q4 is the input 61 of alternate path module 60, the second conduction terminal of the 4th switching tube Q4 connects the first conduction terminal of the 5th switching tube Q5, and the second conduction terminal of the 5th switching tube Q5 is the output 62 of alternate path module 60; The trigger end of the 4th switching tube Q4 is that the first conduction terminal of the second control input end 64, the four switching tube Q4 of alternate path module 60 connects its trigger end through a resistance R 4; The trigger end of the 5th switching tube Q5 is that the trigger end of the first control input end 63, the five switching tube Q5 of alternate path module 60 is through resistance R 5 ground connection.
The present embodiment be take the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4 and the 5th switching tube Q5 as PMOS pipe is preference, and the external charging circuit of the present embodiment is described.Certainly, above-mentioned switching tube can also have for other switching tube or the device of same function.The first conduction terminal of the first switching tube Q1, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of second switch pipe Q2, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of the 3rd switching tube Q3, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of the 4th switching tube Q4, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of the 5th switching tube Q5, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid.
First channel module 50 of the present embodiment and the operation principle of alternate path module 60 are as follows:
When 1, adapter 200 power supply (being Payload attach fitting 200) patterns are externally charged, the grid of second switch pipe Q2 is high level, second switch pipe Q2 cut-off.Main control module 40 output low levels are to break-make control end 55, the first switching tube Q1 conducting, the second conduction terminal of the first switching tube Q1 (being control output end 56) is high level, the trigger end of the 5th switching tube Q5 is high level, the 5th switching tube Q5 cut-off, thus alternate path module 60 is in off-state; Simultaneously, the 3rd switching tube Q3 conducting, the first conduction terminal of the 3rd switching tube Q3 (i.e. the second output 54) high level, the Enable Pin EN of Voltage stabilizing module 20 is high level, Voltage stabilizing module 20 starts, and the electric current of adapter 200 outputs exports direct current transformation module 10 to through the first output 53 of the first channel module 50, direct current transformation module 10 output currents are exported to electronic equipment internal system and main control module 40 power supplies through Voltage stabilizing module 20, and direct current transformation module 10 output currents are module 70 and external 30 pairs of outside equipment charges of charging inlet after testing.
When 2, battery 100 power supply (Payload attach fitting 200) patterns are externally charged:
Electronic equipment is when start situation, main control module 40 output low levels are to break-make control end 55, the first switching tube Q1 and the 3rd switching tube Q3 conducting, and the trigger end of while second switch pipe Q2 is Payload attach fitting 200 not, the trigger end of second switch pipe Q2 is low level, also conducting of second switch pipe Q2.Battery 100 externally charges through the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, direct current transformation module 10 and detection module 70, detection module 70 has detected electric current, output low level makes the 4th switching tube Q4 conducting, but now the first conduction terminal of the first switching tube Q1 is high level, so the 5th switching tube Q5 cut-off, alternate path module 60 is failed conducting.Battery 100, through built-in system and main control module 40 power supplies of the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, direct current transformation module 10 and 20 pairs of electronic equipments of Voltage stabilizing module, keeps electronic equipment start simultaneously.
Electronic equipment is when open state externally charges by battery 100, electronic equipment is shut down, main control module 40 is not worked, main control module 40 not output low level to break-make control end 55, the first switching tube Q1 and the 3rd switching tube Q3 disconnect, the first channel module 50 disconnects, the Enable Pin EN of Voltage stabilizing module 20 is low level, Voltage stabilizing module 20 disconnects does not work, electronic equipment shutdown, the built-in system of electronic equipment and main control module 40 be no power all, main control module 40 is without low level output, the first channel module 50 remains open, the control output end 56 of the first channel module 50 is without high level output, the trigger end of the 5th switching tube Q5 is low level, now the 4th switching tube Q4 is in conducting state, the first conduction terminal of the 5th switching tube Q5 is high level, so the 5th switching tube Q5 conducting, 60 conductings of alternate path module, battery 100 is through the 4th switching tube Q4, the 5th switching tube Q5, direct current transformation module 10 and detection module 70 are externally to charge.
Further, in the present embodiment, detection module 70 comprises sample resistance Rs, voltage comparator U and the 6th switching tube Q6, externally charging inlet 30 connects the output of direct current transformation module 10 through sample resistance Rs, the first input end of voltage comparator U connects the output of direct current transformation module 10, the second input of voltage comparator U connects external charging inlet 30, the output of voltage comparator U connects the 6th switching tube Q6 trigger end, the first conduction terminal of the 6th switching tube Q6 connects the second control input end 64 of alternate path module 60, the second conduction terminal ground connection of the 6th switching tube Q6.
The operation principle of detection module 70 is: while externally charging, there is electric current to flow through sample resistance Rs, there is voltage difference in sample resistance Rs two ends, be that the voltage of first input end of voltage comparator U is higher than the voltage of its second input, voltage comparator U output makes the level signal of the 6th switching tube Q6 conducting, the 6th switching tube Q6 conducting, the trigger end of the 4th switching tube Q4 is low level, the 4th switching tube Q4 conducting.While externally not charging, the upper no current of sample resistance Rs, sample resistance Rs both end voltage is identical, and voltage comparator U outputs level signals makes the 6th not conducting of switching tube Q6, and the first conduction terminal of the 4th switching tube Q4 is identical with trigger end voltage, the 4th switching tube Q4 cut-off.
In the present embodiment, between the trigger end of the first switching tube Q1 and its first conduction terminal, be also provided with the capacitor C in parallel with resistance R 11, between the trigger end that is also provided with the capacitor C in parallel with resistance R 32, the four switching tube Q4 between the trigger end of the 3rd switching tube Q3 and its first conduction terminal and its first conduction terminal, be also provided with the capacitor C in parallel with resistance R 43.Capacitor C 1, C2 and C3 play cushioning effect, prevent that the first switching tube Q1, the 3rd switching tube Q3 and the 4th switching tube Q4 from damaging.
Concrete, with reference to Fig. 3, the first scheme of detection module 70: the first input end of voltage comparator U is electrode input end, the second input of voltage comparator U is negative input, the 6th switching tube Q6 is NPN type triode, and the first conduction terminal of the 6th switching tube Q6, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.While externally charging, the voltage of the electrode input end of voltage comparator U is higher than the voltage of its negative input, and voltage comparator U exports high level, makes the 6th switching tube Q6 (NPN type triode) conducting, the trigger end of the 4th switching tube Q4 is low level, thus the 4th switching tube Q4 conducting.
Concrete, with reference to Fig. 4, the alternative plan of detection module 70: the first input end of voltage comparator U is negative input, the second input of voltage comparator U is electrode input end, the 6th switching tube Q6 is positive-negative-positive triode, and the first conduction terminal of the 6th switching tube Q6, the second conduction terminal and trigger end are respectively emitter, collector electrode and base stage.While externally charging, the voltage of the negative input of voltage comparator U is higher than the voltage of its electrode input end, and voltage comparator U output low level, makes the 6th switching tube Q6 (positive-negative-positive triode) conducting, the trigger end of the 4th switching tube Q4 is low level, thus the 4th switching tube Q4 conducting.
Further, with reference to Fig. 2 to 5, in figure, the port of same numeral is what be connected.In above-mentioned arbitrary embodiment, main control module 40 comprises MCU41 and on/off circuit 42, the power end Vcc of MCU41 connects the output VOUT of Voltage stabilizing module 20, on/off circuit 42 comprises the 7th switching tube Q7, switch switch K, the first diode D1 and the second diode D2, the first conduction terminal of the 7th switching tube Q7 connects break-make control end 55, and successively through the positive pole of the first diode D1, the negative pole of the first diode D1, switch switch K is to ground, the second conduction terminal ground connection of the 7th switching tube Q7, the trigger end of the 7th switching tube Q7 connects the GPIO mouth (universal input/output interface) of MCU41, the switching on and shutting down control end S of MCU41 is successively through the positive pole of the second diode D2, the negative pole of the second diode D2 and switch switch K are to ground, the switching on and shutting down control end S of MCU41 also connects the output VOUT of Voltage stabilizing module 20 through a resistance R 7, the power end Vcc of MCU41 connects the output VOUT of Voltage stabilizing module 20.In the present embodiment, to take NPN type triode be example to the 7th switching tube Q7, and the first conduction terminal of the 7th switching tube Q7, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.
The operation principle of main control module 40 is:
Electronic equipment is when open state, the GPIO mouth output high level of MCU41, the 7th switching tube Q7 conducting, thereby battery 100 through resistance R 1 and resistance R 6 to form current circuit, the first conduction terminal voltage of the first switching tube Q1 is higher than the voltage of its trigger end, the first switching tube Q1 conducting, and the trigger end of the 5th switching tube Q5 is high level, the 5th switching tube Q5 cut-off, alternate path module 60 disconnects.If be now battery 100 power supplies, second switch pipe Q2 trigger end is low level, second switch pipe Q2 conducting, the first conduction terminal of the 3rd switching tube Q3 is higher than the voltage of its trigger end, the 3rd also conducting of switching tube Q3, thus battery 100 is through the first switching tube Q1, second switch pipe Q2 and the 3rd switching tube Q3 output voltage; If be now adapter 200 power supplies, second switch pipe Q2 trigger end is high level, second switch pipe Q2 cut-off, and the first conduction terminal voltage of the 3rd switching tube Q3 is higher than the voltage of its trigger end, the 3rd switching tube Q3 conducting, adapter 200 is through the 3rd switching tube Q3 output voltage.
By electronic equipment, when shutting down, MCU41 shutdown is not worked, and the GPIO mouth of MCU41 is without high level output, and the 7th switching tube Q7 ends, the first switching tube Q1 and the 3rd switching tube Q3 cut-off, and the first channel module 50 disconnects.The trigger end of the 5th switching tube Q5 is low level, the 5th switching tube Q5 conducting; If before electronic equipment shutdown be external charging, detection module 70 output low levels, the 4th switching tube Q4 conducting, alternate path module 60 conductings, battery 100 externally charges by alternate path module 60 output voltages.When the external equipment that externally charging inlet 30 connects disconnects (completing external charging) with external charging inlet 30, detection module 70 does not detect electric current, the 4th switching tube Q4 cut-off, and alternate path module 60 also disconnects.
By switch switch K, control the open and close machine of MCU41.1, at electronic equipment during in off-mode, by pressing switch switch K, make break-make control end 55 through resistance R 6 and the first diode D1 ground connection, the first switching tube Q1, second switch pipe Q2 and the 3rd switching tube Q3 conducting, the first channel module 50 conductings, battery 100 is given built-in system and the MCU41 power supply of electronic equipment through the first channel module 50, direct voltage module and Voltage stabilizing module 20, electronic equipment is started shooting completely.Meanwhile, also make the switching on and shutting down control end S of MCU41 through the second diode D2 ground connection, the switching on and shutting down control end S of MCU41 detects low level signal, the MCU41 work of starting shooting, its GPIO mouth output high level, the first channel module 50 conductings.2, at electronic equipment during in open state, by pressing switch switch K, make the switching on and shutting down control end S of MCU41 through the second diode D2 ground connection, the switching on and shutting down control end S of MCU41 detects low level signal, MCU41 shutdown quits work, its GPIO mouth is not exported high level, the first channel module 50 is disconnected, electronic equipment shutdown.If be now in external charged state, alternate path module 60 conductings, battery 100 continues externally charging by alternate path module 60 output voltages.Electronic equipment can also arrange automatic shutdown, the built-in system that electronic equipment detected by the timer in MCU41 in Preset Time when using operation, automatically MCU41 is shut down, thereby the GPIO mouth of MCU41 is not exported high level, the first channel module 50 disconnects.
The utility model further proposes a kind of electronic equipment, comprises external charging circuit, and this external charging circuit can comprise the technical scheme described in above-mentioned arbitrary embodiment, and its concrete structure can be with reference to Fig. 2 to Fig. 5, and therefore not to repeat here.Owing to adopting the scheme of above-mentioned external charging circuit, the utility model electronic equipment is compared to existing electronic equipment, while externally charging under electronic equipment open state, electronic equipment can be shut down, circuit is switched to alternate path conducting, battery 100 externally charges by alternate path module 60, while making user not use electronic equipment under external charged state, electronic equipment can be shut down, close the consumption of electronic equipment internal system to battery 100 electric weight, make the electric weight of battery 100 consumption all for external charging, avoid the waste of battery 100 electric weight.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (10)

1. an external charging circuit for electronic equipment, is characterized in that, comprises direct current transformation module, Voltage stabilizing module, external charging inlet, main control module, the first channel module, alternate path module and detection module, wherein:
Described the first channel module comprises first input end for connecting described electronic equipment internal power supply, for connecting the second input of external power source, the first output being connected with the input of described direct current transformation module, the second output being connected with the Enable Pin of described Voltage stabilizing module, the break-make control end being connected with described main control module and the control output end being connected with described alternate path module;
Described alternate path module comprises the input for connecting described electronic equipment internal power supply, the output being connected with the input of described direct current transformation module, the first control input end being connected with the control output end of described the first channel module and the second control input end being connected with described detection module;
The output of described direct current transformation module connects the input of described Voltage stabilizing module, the built-in system power supply that described Voltage stabilizing module output output voltage is described main control module and described electronic equipment; The output that described external charging inlet connects described direct current transformation module forms external charging path; Described detection module is connected on described external charging path, detects Yes/No electric current on described external charging path, and when electric current being detected, exports Continuity signal to described alternate path module;
The level signal of described main control module by changing described break-make control end to be to control the conducting/disconnection of described the first channel module, thereby control described Voltage stabilizing module start/stop work output; When externally charging and described the first channel module disconnect, the conducting of described alternate path module.
2. external charging circuit according to claim 1, is characterized in that, also comprises the current-limiting protection module being connected between described direct current transformation module output and described detection module.
3. external charging circuit according to claim 1, is characterized in that, described the first channel module comprises the first switching tube, second switch pipe and the 3rd switching tube;
The first conduction terminal of described the first switching tube is the first input end of described the first channel module, the second conduction terminal of described the first switching tube is the control output end of described the first channel module, the second conduction terminal of described the first switching tube connects the first conduction terminal of described second switch pipe, the second conduction terminal of described second switch pipe is the second input of described the first channel module, and the second conduction terminal of described second switch pipe connects the first conduction terminal of described the 3rd switching tube; The first conduction terminal of described the first switching tube connects its trigger end through a resistance, and the first conduction terminal of described the 3rd switching tube connects its trigger end through a resistance;
The second conduction terminal of described the 3rd switching tube is the first output of described the first channel module, and the first conduction terminal of described the 3rd switching tube is the second output of described the first channel module; The trigger end of the trigger end of described the first switching tube and described three switching tubes is connected the break-make control end of described the first channel module, the trigger end of described second switch pipe is for being connected with described externally fed source, and the trigger end of described second switch pipe is through a grounding through resistance.
4. external charging circuit according to claim 3, it is characterized in that, described alternate path module comprises the 4th switching tube and the 5th switching tube, the first conduction terminal of described the 4th switching tube is the input of described alternate path module, the second conduction terminal of described the 4th switching tube connects the first conduction terminal of described the 5th switching tube, and the second conduction terminal of described the 5th switching tube is the output of described alternate path module; The trigger end of described the 4th switching tube is the second control input end of described alternate path module, and the first conduction terminal of described the 4th switching tube connects its trigger end through a resistance; The trigger end of described the 5th switching tube is the first control input end of described alternate path module, and the trigger end of described the 5th switching tube is through a grounding through resistance.
5. external charging circuit according to claim 4, is characterized in that, described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and the 5th switching tube are PMOS pipe;
The first conduction terminal of described the first switching tube, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of described second switch pipe, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of described the 3rd switching tube, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid; The first conduction terminal of described the 4th switching tube, the second conduction terminal and trigger end are respectively source electrode, drain and gate; The first conduction terminal of described the 5th switching tube, the second conduction terminal and trigger end are respectively drain electrode, source electrode and grid.
6. external charging circuit according to claim 1, it is characterized in that, described detection module comprises sample resistance, voltage comparator and the 6th switching tube, described external charging inlet connects the output of described direct current transformation module through described sample resistance, the first input end of described voltage comparator connects the output of described direct current transformation module, the second input of described voltage comparator connects described external charging inlet, the output of described voltage comparator connects described the 6th switching tube trigger end, the first conduction terminal of described the 6th switching tube connects the second control input end of described alternate path module, the second conduction terminal ground connection of described the 6th switching tube.
7. external charging circuit according to claim 6, it is characterized in that, the first input end of described voltage comparator is electrode input end, the second input of described voltage comparator is negative input, described the 6th switching tube is NPN type triode, and the first conduction terminal of described the 6th switching tube, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.
8. external charging circuit according to claim 6, it is characterized in that, the first input end of described voltage comparator is negative input, the second input of described voltage comparator is electrode input end, described the 6th switching tube is positive-negative-positive triode, and the first conduction terminal of described the 6th switching tube, the second conduction terminal and trigger end are respectively emitter, collector electrode and base stage.
9. according to the external charging circuit described in any one in claim 1-8, it is characterized in that, described main control module comprises MCU and on/off circuit, the power end of described MCU connects the output of described Voltage stabilizing module, described on/off circuit comprises the 7th switching tube, switch switch, the first diode and the second diode, the first conduction terminal of described the 7th switching tube connects described break-make control end, and successively through the positive pole of described the first diode, the negative pole of the first diode, switch switch is to ground, the second conduction terminal ground connection of described the 7th switching tube, the trigger end of described the 7th switching tube connects the GPIO mouth of described MCU, the switching on and shutting down control end of described MCU is successively through the positive pole of described the second diode, the negative pole of the second diode and switch switch are to ground, the switching on and shutting down control end of described MCU also connects the output of described Voltage stabilizing module through a resistance, the power end of described MCU connects the output of described Voltage stabilizing module,
Described the 7th switching tube is NPN type triode, and the first conduction terminal of described the 7th switching tube, the second conduction terminal and trigger end are respectively collector electrode, emitter and base stage.
10. an electronic equipment, is characterized in that, comprises external charging circuit as claimed in any one of claims 1-9 wherein.
CN201420209749.2U 2014-04-25 2014-04-25 Electronic equipment and external charging circuit thereof Expired - Fee Related CN203859558U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107465227A (en) * 2015-06-12 2017-12-12 联想(北京)有限公司 A kind of electronic equipment and its control method
CN107948798A (en) * 2017-12-19 2018-04-20 歌尔股份有限公司 Charging box, wireless device and wireless headset
WO2018209615A1 (en) * 2017-05-17 2018-11-22 深圳市大疆创新科技有限公司 Communication control method, communication master device and communication system
CN110912213A (en) * 2018-09-17 2020-03-24 Oppo广东移动通信有限公司 Electronic equipment, power supply method of electronic equipment and storage medium
CN112631357A (en) * 2020-12-22 2021-04-09 博科能源系统(深圳)有限公司 DC voltage-stabilized power supply circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107465227A (en) * 2015-06-12 2017-12-12 联想(北京)有限公司 A kind of electronic equipment and its control method
WO2018209615A1 (en) * 2017-05-17 2018-11-22 深圳市大疆创新科技有限公司 Communication control method, communication master device and communication system
CN107948798A (en) * 2017-12-19 2018-04-20 歌尔股份有限公司 Charging box, wireless device and wireless headset
CN107948798B (en) * 2017-12-19 2020-02-14 歌尔股份有限公司 Charging box, wireless device and wireless earphone
CN110912213A (en) * 2018-09-17 2020-03-24 Oppo广东移动通信有限公司 Electronic equipment, power supply method of electronic equipment and storage medium
CN112631357A (en) * 2020-12-22 2021-04-09 博科能源系统(深圳)有限公司 DC voltage-stabilized power supply circuit

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