CN205319793U - A power automatic switch -over circuit for in smart card equipment - Google Patents
A power automatic switch -over circuit for in smart card equipment Download PDFInfo
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- CN205319793U CN205319793U CN201620027962.0U CN201620027962U CN205319793U CN 205319793 U CN205319793 U CN 205319793U CN 201620027962 U CN201620027962 U CN 201620027962U CN 205319793 U CN205319793 U CN 205319793U
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- module
- power supply
- voltage reduction
- voltage
- smart card
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Abstract
The utility model relates to a power control technical field, concretely relates to a power automatic switch -over circuit for in smart card equipment, the utility model discloses a: the mainboard is equipped with on this mainboard: power input module, it is used for carrying on the power input, the last relatively module of a voltage reducing module, the 2nd voltage reducing module and voltage monitoring that has connect respectively of power input module has met energy -storage capacitor and boost module respectively on the 2nd voltage reducing module, energy -storage capacitor's output meets with this boost module's input, stand -by power supply control switch has been met between a boost module and the voltage reducing module, a voltage reducing module is to the power of the importing laggard line output that steps down, the magnitude of voltage that voltage monitoring comparison module will be inputed most likely carries out the comparison with the default, exports corresponding control signal, this stand -by power supply control switch is according to its control signal, controls this boost module and a voltage reducing module's connection status. The utility model discloses its stable in structure, the reliability is high, has reduced whole volume and manufacturing cost.
Description
Technical field
The utility model relates to Energy control technical field, is specifically related to a kind of for the power supply automatic switchover circuit in smart card device.
Background technology
In the smart card devices such as electronic card reader and hair fastener machine, it all requires after main power source falls electricity, utilizes stand-by power supply that the card in equipment is return user and is maybe reclaimed by card. This just requires to be provided with stand-by power supply on equipment, after device looses power, utilizes stand-by power supply to provide energy to return or card in recovery equipment. In existing smart card device, it is connected to stand-by power supply socket, and is connected to outside battery by this stand-by power supply socket; The connection of stand-by power supply socket is also insecure, and its reliability is lower, and increases overall volume, and cost is higher.
Summary of the invention
For overcoming above-mentioned defect, namely the purpose of this utility model is to provide a kind of for the power supply automatic switchover circuit in smart card device.
The purpose of this utility model is achieved through the following technical solutions:
The utility model is a kind of for the power supply automatic switchover circuit in smart card device, and it is arranged in smart card device, comprising: mainboard, and described mainboard is provided with:
Power supply input module, described power supply input module connects with outside circuit, for carrying out power supply input; Described power supply input module is connected to the first voltage reduction module and the 2nd voltage reduction module respectively, the power supply inputted is after carrying out step-down through described 2nd voltage reduction module, enter energy storage electric capacity and boosting module respectively, electric energy after the 2nd voltage reduction module is stored by described energy storage electric capacity, and its output connects with the input of described boosting module; The output of described boosting module is connected to stand-by power supply control switch, and the output of described stand-by power supply control switch connects with the input of described first voltage reduction module; Described first voltage reduction module outputs in the card control device of smart card device after the power supply inputted is carried out step-down;
Described power supply input module is also connected to voltage monitoring comparison module, described voltage monitoring comparison module is for obtaining the voltage value of institute's input power in this power supply input module, and this voltage value and preset value are compared, and according to comparing result, control switch to described stand-by power supply and export corresponding control signal; Described stand-by power supply control switch, according to its control signal, controls the connection status of described boosting module and the first voltage reduction module.
Further, described 2nd voltage reduction module being connected to: soft-start module, described soft-start module is for being limited to the electric current value being input to described 2nd voltage reduction module in predetermined scope.
Further, between described power supply input module and described first voltage reduction module, between described power supply input module and described 2nd voltage reduction module, between described stand-by power supply control switch and described first voltage reduction module, it is equipped with electric current direction controlling device.
Further, described electric current direction controlling device is diode.
Further, described energy storage electric capacity is made up of the farad capacitor of three 2.7V.
Energy storage electric capacity is fixed on mainboard by the utility model, its Stability Analysis of Structures, and reliability height reduces overall volume and production cost.
Accompanying drawing explanation
For ease of illustrating, the utility model is described in detail by following better embodiment and accompanying drawing.
Fig. 1 is the utility model electrical block diagram.
Specific embodiment party formula
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further described. It is to be understood that specific embodiment described herein is only in order to explain the utility model, and it is not used in restriction the utility model.
Referring to Fig. 1, the utility model is a kind of for the power supply automatic switchover circuit in smart card device, and it is arranged in smart card device, comprising: mainboard, and described mainboard is provided with:
Power supply input module 1, described power supply input module 1 connects with outside circuit, for carrying out power supply input; Described power supply input module 1 is connected to the first voltage reduction module 2 and the 2nd voltage reduction module 3 respectively, the power supply inputted is after carrying out step-down through described 2nd voltage reduction module 3, enter energy storage electric capacity 4 and boosting module 5 respectively, electric energy after the 2nd voltage reduction module 3 is stored by described energy storage electric capacity 4, and its output connects with the input of described boosting module 5; Voltage from the 2nd voltage reduction module 3 and energy storage electric capacity 4 is elevated to the nominal value of direct current generator normal operation by boosting module 5; The output of described boosting module 5 is connected to stand-by power supply control switch 6, and the output of described stand-by power supply control switch 6 connects with the input of described first voltage reduction module 2; Described first voltage reduction module 2 outputs in the card control device of smart card device after the power supply inputted is carried out step-down;
Described power supply input module 1 is also connected to voltage monitoring comparison module 7, described voltage monitoring comparison module 7 is for obtaining the voltage value of institute's input power in this power supply input module 1, and this voltage value and preset value are compared, and according to comparing result, control switch 6 to described stand-by power supply and export corresponding control signal; Namely, under normal electric power thus supplied, it exports high-level control signal and controls switch 6 to stand-by power supply, disconnects the connection of boosting module 5 and the first voltage reduction module 2, to cut off stand-by power supply circuit; When the input voltage of power supply is less than the pre-threshold value set, exporting low level control signal and control switch 6 to stand-by power supply, boosting module 5 is connected with the first voltage reduction module 2, makes stand-by power supply access master control circuit; Described stand-by power supply control switch 6, according to its control signal, controls the connection status of described boosting module 5 and the first voltage reduction module 2.
The mode of the utility model by boosting again after first reducing pressure, it is achieved that the advantage of Width funtion input, it is ensured that 12V and 24V power supply all can use. Meanwhile, ensure that the voltage exported is not by the impact of input supply voltage fluctuation. Power supply input module 1 under the control of each front stage circuits, starts to be charged by energy storage electric capacity 4 after being energized. After equipment enters steady operation, energy storage electric capacity 4 powers to together with the 2nd voltage reduction module 3 boosting module 5; It effectively improves power stage;
Further, described 2nd voltage reduction module 3 being connected to: soft-start module 8, described soft-start module 8 is for being limited in predetermined scope by the electric current value being input to described 2nd voltage reduction module 3; It is to energy storage electric capacity 4, it is achieved that Current Control during charging, prevents from being impacted by power supply.
Further, between described power supply input module 1 and described first voltage reduction module 2, between described power supply input module 1 and described 2nd voltage reduction module 3, being equipped with electric current direction controlling device between described stand-by power supply control switch 6 and described first voltage reduction module 2, described electric current direction controlling device is diode; Three diodes are respectively first, second, third diode 9,10,11; Carry out circuit isolation by diode, prevent from forming loop consumed energy.
Further, described energy storage electric capacity 4 is made up of the farad capacitor of three 2.7V, in the utility model, after stand-by power supply is mainly used for device looses power, making equipment can carry out moving back card, therefore its power supply is less demanding, the utility model adopts the farad capacitor of three 2.7V to carry out storage of electrical energy, while meeting work requirements, it reduces the volume of energy storage component significantly.
The foregoing is only better embodiment of the present utility model; not in order to limit the utility model; all any amendment, equivalent replacement and improvement etc. done within spirit of the present utility model and principle, all should be included within protection domain of the present utility model.
Claims (5)
1., for the power supply automatic switchover circuit in smart card device, it is arranged in smart card device, it is characterised in that, comprising: mainboard, described mainboard is provided with:
Power supply input module, described power supply input module connects with outside circuit, for carrying out power supply input; Described power supply input module is connected to the first voltage reduction module and the 2nd voltage reduction module respectively, the power supply inputted is after carrying out step-down through described 2nd voltage reduction module, enter energy storage electric capacity and boosting module respectively, electric energy after the 2nd voltage reduction module is stored by described energy storage electric capacity, and its output connects with the input of described boosting module; The output of described boosting module is connected to stand-by power supply control switch, and the output of described stand-by power supply control switch connects with the input of described first voltage reduction module; Described first voltage reduction module outputs in the card control device of smart card device after the power supply inputted is carried out step-down;
Described power supply input module is also connected to voltage monitoring comparison module, described voltage monitoring comparison module is for obtaining the voltage value of institute's input power in this power supply input module, and this voltage value and preset value are compared, and according to comparing result, control switch to described stand-by power supply and export corresponding control signal; Described stand-by power supply control switch, according to its control signal, controls the connection status of described boosting module and the first voltage reduction module.
2. according to claim 1 for the power supply automatic switchover circuit in smart card device, it is characterized in that, being connected on described 2nd voltage reduction module: soft-start module, described soft-start module is for being limited to the electric current value being input to described 2nd voltage reduction module in predetermined scope.
3. according to claim 2 for the power supply automatic switchover circuit in smart card device, it is characterized in that, between described power supply input module and described first voltage reduction module, between described power supply input module and described 2nd voltage reduction module, between described stand-by power supply control switch and described first voltage reduction module, it is equipped with electric current direction controlling device.
4. according to claim 3 for the power supply automatic switchover circuit in smart card device, it is characterised in that, described electric current direction controlling device is diode.
5. according to claim 4 for the power supply automatic switchover circuit in smart card device, it is characterised in that, described energy storage electric capacity is made up of the farad capacitor of three 2.7V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620027962.0U CN205319793U (en) | 2016-01-12 | 2016-01-12 | A power automatic switch -over circuit for in smart card equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620027962.0U CN205319793U (en) | 2016-01-12 | 2016-01-12 | A power automatic switch -over circuit for in smart card equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205319793U true CN205319793U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620027962.0U Withdrawn - After Issue CN205319793U (en) | 2016-01-12 | 2016-01-12 | A power automatic switch -over circuit for in smart card equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205319793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471090A (en) * | 2016-01-12 | 2016-04-06 | 深圳市天毅科技有限公司 | Power supply automatic switching circuit used in intelligent card device |
-
2016
- 2016-01-12 CN CN201620027962.0U patent/CN205319793U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471090A (en) * | 2016-01-12 | 2016-04-06 | 深圳市天毅科技有限公司 | Power supply automatic switching circuit used in intelligent card device |
| CN105471090B (en) * | 2016-01-12 | 2017-12-22 | 深圳市天毅科技有限公司 | A kind of power supply automatic switchover circuit being used in smart card device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160615 Effective date of abandoning: 20171222 |