CN202153645U - Electric device based on OTG interface charging - Google Patents

Electric device based on OTG interface charging Download PDF

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Publication number
CN202153645U
CN202153645U CN2011202225336U CN201120222533U CN202153645U CN 202153645 U CN202153645 U CN 202153645U CN 2011202225336 U CN2011202225336 U CN 2011202225336U CN 201120222533 U CN201120222533 U CN 201120222533U CN 202153645 U CN202153645 U CN 202153645U
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China
Prior art keywords
module
current
signal
power supply
otg interface
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Expired - Fee Related
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CN2011202225336U
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Chinese (zh)
Inventor
徐炳林
屈闯
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BYD Co Ltd
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BYD Co Ltd
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Abstract

The utility model provides an electric device based on OTG interface charging, comprising an OTG interface module, a current comparison module, a switch module, a control module, a power supply processing module, a battery, and a charging module, wherein the charging module is electrically connected with the battery, the switch module, and the current comparison module respectively; the control module is electrically connected with the signal end of the OTG interface module, the current comparison module, the switch module, and the power supply processing module respectively; the power supply end of the OTG interface module is electrically connected with the current comparison module, the switch module, and the power supply processing module respectively; and the power supply processing module is electrically connected with the battery. The electric device based on OTG interface charging will not experience the situation that the battery discharges itself for self-charging.

Description

A kind of electronic equipment based on the charging of OTG interface
Technical field
The utility model relates to electronic equipment, relates in particular to a kind of electronic equipment based on the charging of OTG interface.
Background technology
Along with the development of electronic equipment, the user is also more and more to the requirement of electronic equipment.Have the electronic equipment of OTG (On The Go) interface at present, make electronic equipment both can be used as main frame, also can be used as the peripheral hardware operation.The USB otg standard has increased power management function on the basis of complete compatible USB2.0 standard, feasible electronic equipment through the OTG interface both can carry out communication, can charge again.
As shown in Figure 1; Said electronic equipment comprises that the OTG interface module is mAB socket, metal-oxide-semiconductor, control circuit 20, control unit 30, over-current protecting unit 40, power supply unit 50, battery 60 and charhing unit 70; Said charhing unit 70 is electrically connected with metal-oxide-semiconductor with said battery 60 respectively, and said control circuit 20 is electrically connected with the signal end ID and the metal-oxide-semiconductor of mAB socket respectively, and control unit 30 is electrically connected with signal end ID, over-current protecting unit 40 and the power supply unit 50 of mAB socket respectively; Said battery 60 is electrically connected with said power supply unit 50; Confirm the function of electronic equipment through the signal end ID of mAB socket, the ID pin ground connection in the mA plug, the ID pin in the mB plug is floating empty; Such as when the mAB socket is connected with the mA plug; Be that mAB socket signal end ID receives low level signal, then expression is given this electronic equipment charging or is represented that this electronic equipment is a main frame, when the mAB socket is connected with the mB plug; Be mAB socket signal end ID when receiving high level signal, represent that then this electronic equipment is a slave unit.When carrying out electronic equipment charged; When if charging inlet is selected the mA interface for use; The signal end ID output low level signal of mAB socket, control circuit 20 need the conducting of control metal-oxide-semiconductor, and control unit 30 needs control over-current protecting unit 40, power supply unit 50 and charhing unit 70 work simultaneously; Make to form the loop between metal-oxide-semiconductor, over-current protecting unit 40, power supply unit 50, charhing unit 70 and the battery 60, battery oneself discharge occurs and give oneself situation of charging.
Summary of the invention
Battery oneself discharge provides a kind of electronic equipment based on the charging of OTG interface to the technical problem of oneself charging to the utility model in the prior art in order to solve, and battery oneself discharge can not occur and give the situation of oneself charging.
The utility model provides a kind of electronic equipment based on the charging of OTG interface; Said electronic equipment comprises OTG interface module, current comparing module, switch module, control module, power supply processing module, battery and charging module; Said charging module is electrically connected with said battery, switch module and current comparing module respectively; Said control module is electrically connected with signal end, current comparing module, switch module and the power supply processing module of OTG interface module respectively; The power end of said OTG interface module is electrically connected with current comparing module, switch module and power supply processing module respectively, and said power supply processing module is electrically connected with battery;
The power supply processing module is used for the OTG interface module is supplied power;
Current comparing module is used to detect the power end of OTG interface module, when the size of output current that detects said power end and output current reaches preset value, exports first comparison signal, otherwise exports second comparison signal;
Control module; Be used for output signal according to OTG interface module signal end, the conducting of control switch module or disconnection, and when the switch module conducting and when receiving second comparison signal of current comparing module; The work of control power supply processing module, otherwise control power supply processing module quits work;
Charging module; Be used for when first comparison signal that receives current comparing module and when receiving the output current of said power end; Begin battery is charged; When second comparison signal that receives current comparing module or when not receiving the output current of said power end, stop battery being charged.
Further, said switch module is specially metal-oxide-semiconductor or IGBT pipe.
Further, the output signal of said OTG interface module signal end is high level signal and low level signal.
Further; Said control module comprises first control unit and second control unit; Said first control unit is electrically connected with the signal end of switch module and OTG interface module respectively, and said second control unit is electrically connected with signal end, current comparing module and the power supply processing module of OTG interface module respectively;
First control unit also is used for when the output signal of OTG interface module signal end is high level, the conducting of control switch module, and when the output signal of OTG interface module signal end is low level, the disconnection of control switch module;
Second control unit is used for when the output signal of OTG interface module signal end is high level and second comparison signal that receives current comparing module, the work of control power supply processing module, otherwise control power supply processing module quits work.
Further; Said control module comprises first control unit and second control unit; Said first control unit is electrically connected with the signal end of switch module and OTG interface module respectively, and said second control unit is electrically connected with signal end, current comparing module and the power supply processing module of OTG interface module respectively;
First control unit is used for when the output signal of OTG interface module signal end is low level, the conducting of control switch module, and when the output signal of OTG interface module signal end is high level, the disconnection of control switch module;
Second control unit is used for when the output signal of OTG interface module signal end is low level and second comparison signal that receives current comparing module, the work of control power supply processing module, otherwise control power supply processing module quits work.
Further; Said power supply processing module comprises over-current protecting unit and power supply unit; Said power supply unit is electrically connected with said over-current protecting unit, second control unit and battery respectively, and said over-current protecting unit is electrically connected with the power end and second control unit of OTG interface module respectively.
Further; Said current comparing module comprises current detecting unit, operational amplifier and comparator; The positive pole of said operational amplifier is electrically connected with the input of said current detecting unit; The negative pole of said operational amplifier is electrically connected with the output of said current detecting unit, and the output of said operational amplifier is connected with the positive electrical of said comparator, the output of said comparator be electrically connected with second control unit and charging module respectively;
Current detecting unit is used to detect the size of current of OTG interface module power end;
Operational amplifier is used for the sense of current according to OTG interface module power end, and the detected current value of current detecting unit is amplified and exports;
Comparator, the output current that is used for operational amplifier on the occasion of and output current value when reaching preset value, export first comparison signal, otherwise export second comparison signal.
Further, said current detecting unit is specially sampling resistor.
The electronic equipment that the utility model provides compared with prior art; When first comparison signal that receives current comparing module and when receiving the output current of said power end; Charging module begins battery is charged, and the processing module of supplying power this moment does not receive second comparison signal of current comparing module, and the power supply processing module quits work; Therefore can not form the loop between charging module, power supply processing module and the switch module, not give oneself situation of charging thereby battery oneself discharge can not occur.
Description of drawings
Fig. 1 is the structural representation of prior art electronic equipment.
Fig. 2 is the structured flowchart of a kind of embodiment of the utility model electronic equipment.
Fig. 3 is the structural representation of a kind of embodiment of the utility model electronic equipment.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model provides the electronic equipment based on the charging of OTG interface of a kind of embodiment; As shown in Figure 2; Said electronic equipment comprises OTG interface module 1, current comparing module 2, switch module 3, control module 4, power supply processing module 5, battery 6 and charging module 7; Said charging module 7 is electrically connected with said battery 6, switch module 3 and current comparing module 2 respectively; Said control module 4 is electrically connected with signal end 1a, current comparing module 2, switch module 3 and the power supply processing module 5 of OTG interface module respectively; The power end 1b of said OTG interface module is electrically connected with current comparing module 2, switch module 3 and power supply processing module 5 respectively, and said power supply processing module 5 is electrically connected with battery 6;
Power supply processing module 5 is used for OTG interface module 1 is supplied power;
Current comparing module 2 is used to detect the power end 1b of OTG interface module, when the size of output current that detects said power end and output current reaches preset value, exports first comparison signal, otherwise exports second comparison signal;
Control module 4; Be used for output signal according to OTG interface module signal end 1a; The conducting of control switch module 3 or disconnection; And when switch module 3 conductings and when receiving second comparison signal of current comparing module 2,5 work of control power supply processing module, otherwise control power supply processing module 5 quits work;
Charging module 7; Be used for when first comparison signal that receives current comparing module 2 and when receiving the output current of said power end 1b; Begin battery is charged; When second comparison signal that receives current comparing module 2 or when not receiving the output current of said power end, stop battery 6 is charged.
Can find out from such scheme; When first comparison signal that receives current comparing module 2 and when receiving the output current of said power end; Charging module 7 begins battery is charged, and the processing module 5 of supplying power this moment does not receive second comparison signal of current comparing module, and power supply processing module 5 quits work; Therefore can not form the loop between charging module 7, power supply processing module 5 and the switch module 3, thereby the situation that battery 6 oneself discharges and charges for oneself can not occur
In practical implementation, said OTG interface module 1 is specially mAB socket as shown in Figure 3, and said mAB socket comprises power end VBUS and signal end ID.
In practical implementation, said switch module 3 is specially metal-oxide-semiconductor or IGBT pipe, and as shown in Figure 3, said switch module 3 is a metal-oxide-semiconductor.
In practical implementation, the output signal of said OTG interface module signal end 1a is high level signal and low level signal.Said control module 4 comprises first control unit 41 and second control unit 42; Said first control unit 41 is electrically connected with the signal end 1a of switch module 3 and OTG interface module respectively, and said second control unit 42 is electrically connected with signal end 1a, current comparing module 2 and the power supply processing module 5 of OTG interface module respectively;
First control unit 41 also is used for when the output signal of OTG interface module signal end 1a is high level, the conducting of control switch module 3, and when the output signal of OTG interface module signal end 1a is low level, the disconnection of control switch module 3;
Second control unit 42 is used for when the output signal of OTG interface module signal end 1a is high level and second comparison signal that receives current comparing module 2,5 work of control power supply processing module, otherwise control power supply processing module 5 quits work.In the present embodiment; When the output signal of OTG interface module signal end 1a is low level; The conducting of first control unit, 41 control switch modules 3; When the output signal of OTG interface module signal end 1a was high level, the disconnection of first control unit, 41 control switch modules 3 was when the output signal of OTG interface module signal end 1a is low level and second comparison signal that receives current comparing module 2; 5 work of second control unit, 42 control power supply processing modules, otherwise control power supply processing module 5 quits work.
In practical implementation; Said power supply processing module 5 comprises over-current protecting unit 51 and power supply unit 52; Said power supply unit 52 is electrically connected with said over-current protecting unit 51, second control unit 42 and battery 6 respectively, and said over-current protecting unit 51 is electrically connected with the power end 1b and second control unit 42 of OTG interface module respectively.
In practical implementation; Said current comparing module 2 comprises current detecting unit 21, operational amplifier and comparator; The positive pole of said operational amplifier is electrically connected with the input of said current detecting unit 21; The negative pole of said operational amplifier is electrically connected with the output of said current detecting unit 21, and the output of said operational amplifier is connected with the positive electrical of said comparator, and the output of said comparator is electrically connected with second control unit and charging module respectively;
Current detecting unit 21 is used to detect the size of current of OTG interface module power end 1b;
Operational amplifier is used for the sense of current according to OTG interface module power end 1b, and current detecting unit 21 detected current values are amplified and export;
Comparator, the output current that is used for operational amplifier on the occasion of and output current value when reaching preset value, export first comparison signal, otherwise export second comparison signal.
In practical implementation, said current detecting unit 21 is specially sampling resistor, just can detect the flow direction of electric current and the size of electric current through sampling resistor.
In the present embodiment; As shown in Figure 3; Said electronic equipment comprises the mAB socket; The power end VBUS of mAB socket is connected with an end of current detecting unit 21, the positive pole of operational amplifier and the output of over-current protecting unit 51 respectively, and the other end of current detecting unit 21 is connected with the source S of MOS and the negative electricity of operational amplifier respectively, and the output of operational amplifier is connected with the positive pole of comparator; The negative pole of comparator and predeterminated voltage Vref are electrically connected; The output of comparator is electrically connected with the first input end g1 of second control unit 42 and the control end of charging module 7 respectively, and the input of charging module 7 is electrically connected with the drain D of MOS, and the output of charging module 7 is electrically connected with battery 6; The base stage G of said MOS is electrically connected with the output of first control unit 41; The signal end ID of mAB socket is electrically connected with the second input g2 of second control unit 42, the input of first control unit 41 respectively, and the first output g3 of second control unit 42 is electrically connected with the Enable Pin of over-current protecting unit 51, and the second output g4 of second control unit 42 is electrically connected with the Enable Pin of power supply unit 52; The input of said power supply unit 52 is electrically connected with battery 6, and the output of said power supply unit 52 is electrically connected with the input of over-current protecting unit 51.
When charging inlet selects for use the mA interface to be electrically connected with the mAB socket, the signal end ID output low level signal of mAB socket, first control unit 41 is according to the low level signal that receives; The conducting of control metal-oxide-semiconductor; Current detecting unit 21 detects the power end VBUS output current of mAB socket, and from Fig. 3, the flow direction of electric current is for from left to right; When the current value of output current through after the processing of operational amplifier during greater than predeterminated voltage Vref; Comparator is exported first comparison signal, and first comparison signal can be high level or low level, in the present embodiment; First comparison signal is that high level signal is a comparator output high level signal; When the output signal that receives OTG interface module signal end when second control unit 42 was low level and first comparison signal that receives comparator, control over-current protecting unit 51 quit work with power supply unit 52, and charging module 7 receives first control signals and when receiving output current; Begin battery 6 is charged; So be to form the loop between metal-oxide-semiconductor and the charging module 7, and not forming the loop between metal-oxide-semiconductor, charging module 7, over-current protecting unit 51 and the power supply unit 52, therefore the situation that battery 6 oneself discharges and charges for oneself can not appear.
When through the mA interface when being electrically connected with the mAB socket, promptly this electronic equipment during as main frame, the signal end ID output low level signal of mAB socket; First control unit 41 is according to the low level signal that receives, the conducting of control metal-oxide-semiconductor, this moment current detecting unit 21 to detect the electric current of the power end VBUS of mAB socket be zero or do not detect the output current of the power end VBUS of mAB socket; From Fig. 3; The flow direction of electric current is for from right to left, and this moment, comparator was exported second comparison signal, i.e. low level signal; When charging module 7 receives second comparison signal, stop battery 6 is charged.But when second control unit 42 receives the low level signal of mAB socket and receives comparator when exporting second comparison signal; Second control unit 42 control over-current protecting units 51 are started working with power supply unit 52, thereby realize giving the mAB socket to supply power and do the function of current protection.
When through the mB interface when being electrically connected with the mAB socket, promptly this electronic equipment during as slave unit, the signal end ID of mAB socket exports high level signal; First control unit 41 is according to the high level signal that receives, and the control metal-oxide-semiconductor breaks off, this moment current detecting unit 21 to detect the electric current of the power end VBUS of mAB socket be zero; This moment, comparator was exported second comparison signal; Be low level signal, when charging module 7 receives second comparison signal, stop battery 6 is charged.And second control unit 42 receives the high level signal that comparator is exported second comparison signal and received the mAB socket; Control over-current protecting unit 51 quits work with power supply unit 52; When therefore this electronic equipment is as slave unit; Can output current, thus can not impact being connected HPI with it.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims (8)

1. electronic equipment based on OTG interface charging; It is characterized in that: said electronic equipment comprises OTG interface module, current comparing module, switch module, control module, power supply processing module, battery and charging module; Said charging module is electrically connected with said battery, switch module and current comparing module respectively; Said control module is electrically connected with signal end, current comparing module, switch module and the power supply processing module of OTG interface module respectively; The power end of said OTG interface module is electrically connected with current comparing module, switch module and power supply processing module respectively, and said power supply processing module is electrically connected with battery;
The power supply processing module is used for the OTG interface module is supplied power;
Current comparing module is used to detect the power end of OTG interface module, when the size of output current that detects said power end and output current reaches preset value, exports first comparison signal, otherwise exports second comparison signal;
Control module; Be used for output signal according to OTG interface module signal end, the conducting of control switch module or disconnection, and when the switch module conducting and when receiving second comparison signal of current comparing module; The work of control power supply processing module, otherwise control power supply processing module quits work;
Charging module; Be used for when first comparison signal that receives current comparing module and when receiving the output current of said power end; Begin battery is charged; When second comparison signal that receives current comparing module or when not receiving the output current of said power end, stop battery being charged.
2. electronic equipment as claimed in claim 1 is characterized in that: said switch module is specially metal-oxide-semiconductor or IGBT pipe.
3. electronic equipment as claimed in claim 1 is characterized in that: the output signal of said OTG interface module signal end is high level signal and low level signal.
4. electronic equipment as claimed in claim 3; It is characterized in that: said control module comprises first control unit and second control unit; Said first control unit is electrically connected with the signal end of switch module and OTG interface module respectively, and said second control unit is electrically connected with signal end, current comparing module and the power supply processing module of OTG interface module respectively;
First control unit also is used for when the output signal of OTG interface module signal end is high level, the conducting of control switch module, and when the output signal of OTG interface module signal end is low level, the disconnection of control switch module;
Second control unit is used for when the output signal of OTG interface module signal end is high level and second comparison signal that receives current comparing module, the work of control power supply processing module, otherwise control power supply processing module quits work.
5. electronic equipment as claimed in claim 3; It is characterized in that: said control module comprises first control unit and second control unit; Said first control unit is electrically connected with the signal end of switch module and OTG interface module respectively, and said second control unit is electrically connected with signal end, current comparing module and the power supply processing module of OTG interface module respectively;
First control unit is used for when the output signal of OTG interface module signal end is low level, the conducting of control switch module, and when the output signal of OTG interface module signal end is high level, the disconnection of control switch module;
Second control unit is used for when the output signal of OTG interface module signal end is low level and second comparison signal that receives current comparing module, the work of control power supply processing module, otherwise control power supply processing module quits work.
6. electronic equipment as claimed in claim 5; It is characterized in that: said power supply processing module comprises over-current protecting unit and power supply unit; Said power supply unit is electrically connected with said over-current protecting unit, second control unit and battery respectively, and said over-current protecting unit is electrically connected with the power end and second control unit of OTG interface module respectively.
7. electronic equipment as claimed in claim 5; It is characterized in that: said current comparing module comprises current detecting unit, operational amplifier and comparator; The positive pole of said operational amplifier is electrically connected with the input of said current detecting unit; The negative pole of said operational amplifier is electrically connected with the output of said current detecting unit; The output of said operational amplifier is connected with the positive electrical of said comparator, the output of said comparator be electrically connected with second control unit and charging module respectively;
Current detecting unit is used to detect the size of current of OTG interface module power end;
Operational amplifier is used for the sense of current according to OTG interface module power end, and the detected current value of current detecting unit is amplified and exports;
Comparator, the output current that is used for operational amplifier on the occasion of and output current value when reaching preset value, export first comparison signal, otherwise export second comparison signal.
8. electronic equipment as claimed in claim 7 is characterized in that: said current detecting unit is specially sampling resistor.
CN2011202225336U 2011-06-28 2011-06-28 Electric device based on OTG interface charging Expired - Fee Related CN202153645U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102629772A (en) * 2012-04-05 2012-08-08 福兴达科技实业(深圳)有限公司 Mobile terminal and charging method of mobile terminal
WO2013178033A1 (en) * 2012-05-28 2013-12-05 华为终端有限公司 Current switch control device and electronic device
CN104320115A (en) * 2014-11-06 2015-01-28 贸联电子(昆山)有限公司 USB OTG module
CN105896662A (en) * 2016-05-11 2016-08-24 深圳市高拓新能科技有限公司 Single-port mobile power control circuit and control method thereof
JP2022068168A (en) * 2018-07-17 2022-05-09 ペキン シャオミ モバイル ソフトウェア カンパニー, リミテッド Reverse direction charging device, and reverse direction charging current adjustment method and device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102629772A (en) * 2012-04-05 2012-08-08 福兴达科技实业(深圳)有限公司 Mobile terminal and charging method of mobile terminal
WO2013178033A1 (en) * 2012-05-28 2013-12-05 华为终端有限公司 Current switch control device and electronic device
CN103457458A (en) * 2012-05-28 2013-12-18 华为终端有限公司 Current switching control device and electronic device
CN103457458B (en) * 2012-05-28 2016-03-30 华为终端有限公司 Current switching control appliance and electronic equipment
US9727111B2 (en) 2012-05-28 2017-08-08 Huawei Device Co., Ltd. Control device for current switching and electronic device
CN104320115A (en) * 2014-11-06 2015-01-28 贸联电子(昆山)有限公司 USB OTG module
CN105896662A (en) * 2016-05-11 2016-08-24 深圳市高拓新能科技有限公司 Single-port mobile power control circuit and control method thereof
JP2022068168A (en) * 2018-07-17 2022-05-09 ペキン シャオミ モバイル ソフトウェア カンパニー, リミテッド Reverse direction charging device, and reverse direction charging current adjustment method and device
JP7121865B2 (en) 2018-07-17 2022-08-18 ペキン シャオミ モバイル ソフトウェア カンパニー, リミテッド Reverse charging device, method and device for adjusting reverse charging current

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