Utility model content
The purpose of this utility model is to provide a kind of charging circuit and electronic equipment, to improve above mentioned problem.
What the utility model was realized in：
A kind of charging circuit, applied to electronic equipment, electronic equipment includes using electric loading, and charging circuit includes charging chipAnd battery, charging chip is used for and power electric connection, and is electricity consumption load supplying and is that battery is powered, and charging circuit is also wrappedInclude：Sample circuit, single-way switch circuit and main control chip, charging chip, sample circuit, single-way switch circuit and battery are electric successivelyConnect, and sample circuit, single-way switch circuit and battery are electrically connected with main control chip, sample circuit with electric loading with being electrically connectedConnect；Sample circuit is used to sample to obtain sample rate current to the input current of battery, and sample rate current is fed back into master control corePiece；Single-way switch circuit is used to control the electrical connection on or off between charging chip and battery；Main control chip is used for basisThe current control single-way switch circuit of sample circuit ends the electrical connection between charging chip and battery, and according to battery electricityVoltage-controlled single-way switch circuit processed turns on the electrical connection between charging chip and battery.
Further, the sample circuit includes the first sampling resistor and the second sampling resistor, the charging chip and instituteState the first end electrical connection of the first sampling resistor, the second end of first sampling resistor respectively with the use electric loading and describedThe first end electrical connection of second sampling resistor, the second end of second sampling resistor is electrically connected with the single-way switch circuit.
Further, the single-way switch circuit is power switch, the first contact of the power switch and described secondThe second end electrical connection of sampling resistor, the second contact of the power switch is electrically connected with the battery, and the power switchControl end electrically connected with the main control chip.
Further, the power switch is metal-oxide-semiconductor, the source electrode of the metal-oxide-semiconductor and the second of second sampling resistorEnd electrical connection, the grid of the metal-oxide-semiconductor is electrically connected with the main control chip, and the drain electrode of the metal-oxide-semiconductor is electrically connected with the battery.
Further, the power switch also include the first parasitic diode, the anode of first parasitic diode withThe drain electrode electrical connection of the metal-oxide-semiconductor, the negative electrode of first parasitic diode is electrically connected with the source electrode of the metal-oxide-semiconductor.
Further, the charging circuit also includes booster circuit, and the power switch is metal-oxide-semiconductor, the leakage of the metal-oxide-semiconductorPole is electrically connected with the second end of second sampling resistor, and the grid of the main control chip, booster circuit and the metal-oxide-semiconductor is successivelyElectrical connection, the source electrode of the metal-oxide-semiconductor is electrically connected with the battery.
Further, the power switch also include the second parasitic diode, the anode of second parasitic diode withThe source electrode electrical connection of the metal-oxide-semiconductor, the negative electrode of second parasitic diode is electrically connected with the drain electrode of the metal-oxide-semiconductor.
Further, the main control chip is configured as detecting the electric current or battery electricity of second sampling resistorPressure, when the electric current for detecting second sampling resistor is less than or equal to rated value, controls the single-way switch circuit by instituteState the electrical connection cut-off between charging chip and the battery；When detecting the cell voltage less than or equal to limits value,The single-way switch circuit is controlled to turn on the electrical connection between the charging chip and the battery.
A kind of electronic equipment, including with electric loading and above-mentioned charging circuit, the charging circuit includes charging chipAnd battery, charging chip is used for and power electric connection, and is electricity consumption load supplying and is that battery is powered, and charging circuit is also wrappedInclude：Sample circuit, single-way switch circuit and main control chip, charging chip, sample circuit, single-way switch circuit and battery are electric successivelyConnect, and sample circuit, single-way switch circuit and battery are electrically connected with main control chip, sample circuit with electric loading with being electrically connectedConnect；Sample circuit is used to sample to obtain sample rate current to the input current of battery, and sample rate current is fed back into master control corePiece；Single-way switch circuit is used to control the electrical connection on or off between charging chip and battery；Main control chip is used for basisThe current control single-way switch circuit of sample circuit ends the electrical connection between charging chip and battery, and according to battery electricityVoltage-controlled single-way switch circuit processed turns on the electrical connection between charging chip and battery, described to be electrically connected with electric loading with main control chipConnect.
Further, the electronic equipment is unmanned plane or moving camera.
Compared with the prior art, the utility model has the advantages that：The utility model provide a kind of charging circuit andElectronic equipment, single-way switch circuit is turned off, now charging chip is continuously under the control of main control chip when battery is fully chargedElectricity consumption load supplying；When power supply is removed, battery is electricity consumption load supplying；When the not enough power supply of battery, main control chip control is singleTurned on again to on-off circuit.A kind of charging circuit that the utility model is provided, can be prevented effectively from the frequent discharge and recharge of battery,While ensureing the normal work of electronic equipment, the overall working life of electronic equipment is improved.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, andCoordinate appended accompanying drawing, be described in detail below.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clearChu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realitiesApply example.The component for the utility model embodiment being generally described and illustrated herein in the accompanying drawings can be come with a variety of configurationsArrangement and design.Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limitClaimed scope of the present utility model, but it is merely representative of selected embodiment of the present utility model.Based on the utility modelEmbodiment, the every other embodiment that those skilled in the art are obtained on the premise of creative work is not made, allBelong to the scope of the utility model protection.
In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term is " evenConnect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；It can be machineTool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two membersConnection inside part.For the ordinary skill in the art, it can understand that above-mentioned term is new in this practicality with concrete conditionConcrete meaning in type.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang YiIt is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
Below in conjunction with the accompanying drawings, some embodiments of the present utility model are elaborated.In the case where not conflicting, underFeature in the embodiment and embodiment stated can be mutually combined.
First embodiment
The electronic equipment 100 provided incorporated by reference to reference picture 1, the utility model first embodiment, it includes charging circuit 110With with electric loading 150.Charging circuit 110 includes charging chip 111, sample circuit 113, main control chip 115, single-way switch circuit117 and battery 118, charging chip 111, sample circuit 113, single-way switch circuit 117 and battery 118 are sequentially connected electrically, and are adoptedSample circuit 113, single-way switch circuit 117 and battery 118 are electrically connected with main control chip 115, with electric loading 150 and sample circuit113 electrical connections.Charging chip 111 is electrically connected with power supply 130, as a preferred embodiment, implementing in the utility modelIn example, power supply 130 is dc source of the outside offer such as 220V AC powers or external charging treasured etc..
Charging chip 111 is used to outside 220V AC powers being converted to direct current, or external charging treasured etc. is providedDc source carry out voltage stabilizing, be that battery 118 charges and is to be powered with electric loading 150, charging chip 111 is additionally operable in batteryThe temperature of battery 118 is detected in 118 charging processes, if the temperature of battery 118 is too high, the positive and negative of battery 118 is particularly likely thatShort circuit is there occurs between pole, now charging chip 111 opens short-circuit protection function, prevent main control chip 115 or with electric loading 150Burn.
Charging chip 111 is additionally operable to, in 118 charging complete of battery, be continuously and powered with electric loading 150, be effectively retained orSave the electricity of battery 118, it is to avoid the frequent discharge and recharge of battery 118.
Sample circuit 113 is used to sample to the output current of charging chip 111, and sample rate current is fed back into chargingChip 111, charging chip 111 is according to the size of the big minor adjustment output current of feedback current, it is ensured that normal with electric loading 150Work.
Sample circuit 113 is additionally operable to sample to the input current of battery 118, and sample rate current is fed back into master control corePiece 115, main control chip 115 controls single-way switch circuit 117 by charging chip 111 and battery 118 according to the size of feedback currentBetween electrical connection cut-off.
Refer to Fig. 2, sample circuit 113 includes the first sampling resistor R1 and the second sampling resistor R2, charging chip 111 withFirst sampling resistor R1 first end a1 electrical connections, the first sampling resistor R1 the second end b1 respectively with electric loading 150 and theTwo sampling resistor R2 first end a2 electrical connections, the second sampling resistor R2 the second end b2 is electrically connected with single-way switch circuit 117.
In the present embodiment, the first sampling resistor R1 is used to sample to the output current of charging chip 111, and will adoptSample current feedback is to charging chip 111, and charging chip 111 is according to the big output current of minor adjustment charging chip 111 of feedback currentSize, it is ensured that with the normal work of electric loading 150.
In the present embodiment, the second sampling resistor R2 is used to sample to the input current of battery 118, and will sampling electricityStream feeds back to main control chip 115, and main control chip 115 controls single-way switch circuit 117 to charge core according to the size of feedback currentElectrical connection cut-off between piece 111 and battery 118.
Main control chip 115 is used for the sample rate current for detecting the second sampling resistor R2, when the second sampling resistor R2 sampling electricityWhen stream is less than or equal to charging current rated value, represent that battery 118 fills with electricity, now main control chip 115, which is turned off, unidirectionally opensPowered-down road 117, it is to avoid the overcharge of battery 118.
In the present embodiment, charging current rated value refers to setting the 1/10 of charging current, be less than when charging current orDuring equal to set charging current 1/10, the battery core saturation of battery 118 is, it is necessary to stop charging.
Main control chip 115 is additionally operable to detect the voltage of battery 118, when the voltage of battery 118 is limited less than or equal to voltageDuring value, the not enough power supply of battery 118 is represented, the now control of main control chip 115 opens single-way switch circuit 117 by charging chip 111Electrical connection conducting between battery 118, it is to avoid the overdischarge of battery 118.
In the present embodiment, voltage limit is 3V, and when the voltage of battery 118 is less than or equal to 3V, battery 118 is completeElectric discharge when the voltage that main control chip 115 detects battery 118 increases suddenly, is judged as battery, it is necessary to carry out restorative charging118 are charged normal.
It should be understood that because the main control chip 115 can detect the sample rate current of the second sampling resistor R2, alsoThe voltage of battery 118 can be detected, therefore, a kind of embodiment of the application, it is determined that the second sampling resistor R2 sample rate current is smallControl disconnects the single-way switch circuit in the case of charging current rated value and the cell voltage reach saturation value117, disconnect the electrical connection between charging chip 111 and battery 118, it is to avoid the overcharge of battery 118.
Single-way switch circuit 117 is used under the control of main control chip 115, on or off charging chip 111 and electricityElectrical connection between pond 118, in the present embodiment, single-way switch circuit 117 are power switch 1171, the of power switch 1171One contact s1 is electrically connected with the second sampling resistor R2 the second end b2, the second contact s2 and the electricity of battery 118 of power switch 1171Connection, the control end c of power switch 1171 is electrically connected with main control chip 115.
Fig. 3 is refer to, in the present embodiment, power switch 1171 is preferably metal-oxide-semiconductor Q1 and the first parasitic diode D1,Metal-oxide-semiconductor Q1 drain D is electrically connected as the second contact s2 of power switch 1171 with battery 118, metal-oxide-semiconductor Q1 source S conductThe the first contact s1 and the second sampling resistor R2 of power switch 1171 the second end b2 are electrically connected, and metal-oxide-semiconductor Q1 grid G is used as work(The control end of rate switch 1171 is electrically connected with main control chip 115, the first parasitic diode D1 anode and metal-oxide-semiconductor Q1 drain DElectrical connection, the first parasitic diode D1 negative electrode is electrically connected with metal-oxide-semiconductor Q1 source S.Metal-oxide-semiconductor Q1 is used in main control chip 115Control under, turn off, turned on again when the not enough power supply of battery 118, it is to avoid the mistake of battery 118 when battery 118 is fully chargedFill or cross and put.
In the present embodiment, the first parasitic diode D1 is used to work as has instantaneous large-current, and charging core with electric loading 150When the output current of piece 111 is less than this instantaneous large-current, the electricity of battery 118 is supplemented to electric loading 150, so that electricity consumptionLoad 150 normal works.
When battery 118 is used for the input of no external power source, to be powered with electric loading 150.
The operation principle for the electronic equipment 100 that the utility model first embodiment is provided is：Charging chip 111 is by power supply130 carry out voltage stabilizing, are to be powered with electric loading 150 through the first sampling resistor R1, and sampled circuit 113 and power switch 1171Charged for battery 118；
Charging chip 111 is according to the big output current of minor adjustment charging chip 111 of the first sampling resistor R1 feedback currentSize, it is ensured that with the normal work of electric loading 150；
Main control chip 115 detects the second sampling resistor R2 sample rate current, when the second sampling resistor R2 sample rate current is smallWhen charging current rated value, the switch-off power of main control chip 115 switch 1171, charging chip 111 stops being battery 118Charging, but be continuously and powered with electric loading 150；
When having instantaneous large-current with electric loading 150, the first parasitic diode D1 supplements the electricity of battery 118 to useElectric loading 150；
When power supply 130 is removed, charging chip 111 stops being powered with electric loading 150, is to use electric loading 150 by battery 118Power supply, the detection voltage of battery 118 of main control chip 115, when the voltage of battery 118 is less than or equal to voltage limit, battery 118 stopsIt is only to be powered with electric loading 150；
When power supply 130 is electrically connected again, conducting power switch 1171 again of main control chip 115, charging chip 111 is againBattery 118 charges.
Second embodiment
It refer to Fig. 4, the electronic equipment 200 that the utility model second embodiment is provided, it includes charging circuit 210 and usedElectric loading 150.Charging circuit 210 include charging chip 111, sample circuit 113, main control chip 115, single-way switch circuit 117,Battery 118 and booster circuit 119.Charging chip 111, sample circuit 113, single-way switch circuit 117 and battery 118 are electrically connected successivelyConnect, and sample circuit 113, battery 118 and booster circuit 119 are electrically connected with main control chip 115, single-way switch circuit 117 withBooster circuit 119 is electrically connected, and is electrically connected with electric loading 150 with sample circuit 113, and charging chip 111 is electrically connected with power supply 130.The electronic equipment 200 that the present embodiment is provided, except the power switch 1171 of charging circuit 210 is preferably that metal-oxide-semiconductor Q2 and second is postedRaw diode D2, and add beyond booster circuit 119, the electronic equipment that other circuit connections are provided with first embodiment100 is identical.
In the present embodiment, power switch 1171 is preferably metal-oxide-semiconductor Q2 and the second parasitic diode D2, metal-oxide-semiconductor Q2 leakagePole D is electrically connected as the first contact s1 and the second sampling resistor R2 of power switch 1171 the second end b2, metal-oxide-semiconductor Q2 source electrodeS is electrically connected as the second contact s2 of power switch 1171 with battery 118, and metal-oxide-semiconductor Q2 grid G is used as power switch 1171Control end, and the grid G of main control chip 115, booster circuit 119 and metal-oxide-semiconductor Q2 is sequentially connected electrically, the second parasitic diode D2'sAnode is electrically connected with metal-oxide-semiconductor Q2 source S, and the second parasitic diode D2 negative electrode is electrically connected with metal-oxide-semiconductor Q2 drain D.Metal-oxide-semiconductorQ2 is used under the control of main control chip 115, when the second sampling resistor R2 sample rate current is specified less than or equal to charging currentTurned off during value, when battery 118 voltage be less than or equal to voltage limit when turn on again, it is to avoid battery 118 overcharge orCross and put.
In the present embodiment, booster circuit 119 is used to be boosted the input voltage of metal-oxide-semiconductor Q2 grid G, so as to protectCard metal-oxide-semiconductor Q2 can be turned under the control of main control chip 115.
The operation principle for the electronic equipment 200 that the utility model second embodiment is provided is：Charging chip 111 is by power supply130 carry out voltage stabilizing, to be powered with electric loading 150, and are charged for battery 118；Control of the power switch 1171 in main control chip 115Under system, turned off when battery 118 is fully charged, now charging chip 111 is continuously is powered with electric loading 150, when with electric loading 150During with instantaneous large-current, the second parasitic diode D2 supplements the electricity of battery 118 to electric loading 150；Power supply 130 is removedWhen, battery 118 is to be powered with electric loading 150；When the not enough power supply of battery 118, the control power switch 1171 of main control chip 115Again turn on, thus avoid overcharging or putting excessively for battery 118.
3rd embodiment
It refer to Fig. 5, the utility model 3rd embodiment provides a kind of electronic equipment 300, it includes the utility model theThe charging circuit 110 that one embodiment is provided, and also include using electric loading 150, it is electrically connected with electric loading 150 with charging circuit 110Connect, the correlation function for realizing electronic equipment 300.Electrically connected with electric loading 150 with the first sampling resistor R1 the second end b1,And electrically connected with main control chip 115.
In the present embodiment, included with electric loading 150 any in camera 151, display device 153 and communication equipment 155One or more, camera 151, display device 153 and communication equipment 155 are sequentially connected electrically, and camera 151 and first is sampledResistance R1 the second end b1 electrical connections, and electrically connected with main control chip 115.Camera 151 is used to gather the institute of electronic equipment 300External environmental information, display device 153 is used to show the collection result of camera 151, and communication equipment 155 is set for electronicsStandby 300 and other equipment（Such as PC, mobile phone, tablet personal computer）Communication, for example can be by the collection of camera 151As a result transmit to PC, mobile phone, tablet personal computer etc..
In the present embodiment, electronic equipment 300 can be but not limited to unmanned plane, moving camera etc..
The operation principle for the electronic equipment 300 that the present embodiment is provided is：When power supply 130 is that electronic equipment 300 is powered, warpCharging chip 111 charges to be powered with electric loading 150, and for battery 118, control of the power switch 1171 in main control chip 115Under system, turned off when battery 118 is fully charged, now charging chip 111 is continuously is powered with electric loading 150, when with electric loading 150During with instantaneous large-current, the first parasitic diode D1 supplements the electricity of battery 118 to electric loading 150, and power supply 130 is removedWhen, battery 118 is powers with electric loading 150, when the not enough power supply of battery 118, the control power switch 1171 of main control chip 115Again turn on, be always ensured that the shooting, display and communication function of electronic equipment 300.
In summary, a kind of charging circuit that the utility model is provided, applied to electronic equipment, electronic equipment includes electricity consumptionLoad, charging circuit electrically connects with electric loading, charging circuit including charging chip, sample circuit, main control chip, metal-oxide-semiconductor andBattery, power supply is electrically connected with charging chip, and it is electricity consumption load supplying that charged chip, which carries out voltage stabilizing, and is battery charging；Metal-oxide-semiconductor is turned off under the control of main control chip when battery is fully charged, and now charging chip is continuously electricity consumption load supplying；WhenWhen there is instantaneous large-current with electric loading, parasitic diode of the electricity of battery through metal-oxide-semiconductor is supplemented to using electric loading；Power supply is movedExcept when, battery be electricity consumption load supplying；When the not enough power supply of battery, main control chip control power switch is turned on again.This realityWith a kind of charging circuit of new offer, the frequent discharge and recharge of battery can be prevented effectively from, so as to improve the overall work of electronic equipmentMake the life-span.
It should be noted that herein, such as first and second or the like relational terms are used merely to a realityBody or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operatingIn any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended toNonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including thoseElement, but also other key elements including being not expressly set out, or also include being this process, method, article or equipmentIntrinsic key element.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for thisFor the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principleWithin, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.