CN204517446U - A kind of POS power circuit - Google Patents
A kind of POS power circuit Download PDFInfo
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- CN204517446U CN204517446U CN201520176680.2U CN201520176680U CN204517446U CN 204517446 U CN204517446 U CN 204517446U CN 201520176680 U CN201520176680 U CN 201520176680U CN 204517446 U CN204517446 U CN 204517446U
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Abstract
The utility model provides a kind of POS power circuit, belong to the technical scheme in POS field, the charging circuit that it comprises battery, charge to battery and the battery protecting circuit be connected with battery two ends, and comprise: the USB interface be connected with charging circuit input; Be connected with battery output, for the overvoltage crowbar preventing cell output voltage too high; Be connected with battery output, overvoltage crowbar output, for the switching circuit of powering to POS.Such scheme makes POS can apply USB interface to charge, and substantially increases the convenience of POS charging, thus ensure that POS can keep sufficient circuit to carry out work at any time.
Description
Technical field
The utility model relates to a kind of power circuit, particularly a kind of POS power circuit.
Background technology
The variation of the existing means of payment, using POS to carry out consumption and payment has become a kind of quite universal mode; And existing POS all adopts DC-DC interface to charge, namely charging be unable to do without DC-DC socket, but also not all place also possesses DC-DC socket, or DC-DC socket is away from the use location of POS, thus causes charging inconvenience.If POS cannot be charged because power supply is not enough, will a large amount of transaction be caused to carry out, for businessman, client bring great puzzlement.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of POS power circuit, and this power circuit can solve the problem of existing POS charging inconvenience.
For solving the problem, the technical scheme that the utility model adopts is as follows:
A kind of POS power circuit, the charging circuit comprise battery, battery being charged and the battery protecting circuit be connected with battery two ends, and comprise:
The USB interface be connected with charging circuit input;
Be connected with battery output, for the overvoltage crowbar preventing cell output voltage too high;
Be connected with battery output, overvoltage crowbar output, for the switching circuit of powering to POS.
Preferably, described overvoltage crowbar comprises the first triode, the first resistance, the second resistance and diode; The base stage of this first triode is connected with the anode of diode by the first resistance, its collector electrode is connected with the negative electrode of diode by the second resistance, its grounded emitter, and the negative electrode of diode is connected with battery protecting circuit.
Preferably, described switching circuit comprises the second triode, field effect transistor, the 3rd resistance and the 4th resistance; The base stage of this second triode is connected with the collector electrode of the first triode, its collector electrode is connected with the grid of field effect transistor, its grounded emitter is also connected with the collector electrode of the first triode by the 3rd resistance; 4th resistance two ends are connected with the collector electrode of the second triode, the source electrode of field effect transistor respectively; The source electrode of this field effect transistor is connected with battery protecting circuit, drain extraction power output end.
Preferably, described battery protecting circuit comprises the 5th resistance, the 6th resistance, the 7th resistance and double diode; The input of this double diode is connected with the output of battery by the 5th resistance, by the 6th grounding through resistance, its output is connected with the base stage of the second triode by the 7th resistance.
Preferably, the earth terminal of described battery is connected with for judging the decision circuitry whether battery accesses.
Preferably, described decision circuitry comprises the 8th resistance and the 9th resistance; The earth terminal of described battery is connected with charging circuit by the 8th resistance, draw the battery detecting end for exporting battery access signal by the 9th resistance.
Preferably, described battery is connected with the testing circuit for detecting battery electric quantity.
Preferably, described testing circuit comprises the tenth resistance, the 11 resistance, the first electric capacity and the second electric capacity; The output of described battery is connected with the tenth resistance, the first electric capacity and the second electric capacity; Tenth resistance is connected with the 11 resistance, and draws the electric power detection end for exporting battery electric quantity signal; 11 grounding through resistance.
Preferably, described battery is lithium battery.
Compared to existing technology, the beneficial effects of the utility model are:
1. power consumption entirety reduces, and complete machine cost reduces;
2. charging requirement reduces, and can charge, also can charge to POS with mobile phone charging adapter, make the use of POS more convenient with common portable power source or charger baby to POS, universal;
3. whether this circuit can access normally by monitoring battery at any time, avoids POS normally to work;
4. voltage protection circuit can judge the battery of access, if the access of conventional P OS battery, and meeting power themselves down, facility self-protecting.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, POS power circuit described in the utility model comprises: battery; To the charging circuit that battery BATTERY charges; The battery protecting circuit be connected with battery BATTERY two ends; The USB interface be connected with charging circuit input; Be connected with battery BATTERY output, for the overvoltage crowbar preventing cell output voltage too high; Be connected with battery BATTERY output, overvoltage crowbar output, for the switching circuit of powering to POS; Be connected with battery BATTERY earth terminal, for judging the decision circuitry whether battery accesses; Be connected with battery BATTERY output, for detecting the testing circuit of battery electric quantity.Wherein, described battery BATTERY can be preferably lithium battery.
Wherein, described overvoltage crowbar comprises the first triode Q29, the first resistance R273, the second resistance R274 and diode D27; The base stage of this first triode Q29 is connected with the anode of diode D27 by the first resistance R273, its collector electrode Q29 is connected with the negative electrode of diode D27 by the second resistance R274, its grounded emitter, and the negative electrode of diode D27 is connected with battery protecting circuit.
Described switching circuit comprises the second triode Q27, field effect transistor Q28, the 3rd resistance R271 and the 4th resistance R268; This second triode Q27 base stage is connected with the collector electrode of the first triode Q29, its collector electrode is connected with the grid of field effect transistor Q28, its grounded emitter being connected with the collector electrode of the first triode Q29 by the 3rd resistance R271; 4th resistance R268 two ends are connected with the collector electrode of the second triode Q27, the source electrode of field effect transistor Q28 respectively; The source electrode of this field effect transistor Q28 is connected with battery protecting circuit, drain extraction power output end.
Described battery protecting circuit comprises the 5th resistance R102, the 6th resistance R103, the 7th resistance R272 and double diode D6; The input of this double diode D6 is connected with the output of battery BATTERY by the 5th resistance R102, by the 6th resistance R103 ground connection, its output is connected with the base stage of the second triode Q27 by the 7th resistance R272.
Described decision circuitry comprises the 8th resistance R22 and the 9th resistance R109; The earth terminal of described battery BATTERY is connected with charging circuit by the 8th resistance R22, draw the battery detecting end for exporting battery access signal by the 9th resistance R109.
Described testing circuit comprises the tenth resistance R16, the 11 resistance R17, the first electric capacity C76 and the second electric capacity C13; The output of described battery is connected with the tenth resistance R16, the first electric capacity C76 and the second electric capacity C113; Tenth resistance R16 is connected with the 11 resistance R17, and draws the electric power detection end for exporting battery electric quantity signal; 11 resistance R17 ground connection.
When 5V power supply inputs from USB interface, through charging circuit to battery.After decision circuitry and testing circuit detect, out-put supply is to overvoltage crowbar, if the battery of access is correct, then diode D27 ends, field effect transistor Q28 conducting; Otherwise diode hits D27 and wears, field effect transistor Q28 disconnects.Hold output one road signal from battery BATTERY in addition, judged whether that battery accesses, system thus determine operating state.
Circuit advantage after improvement:
1. power consumption entirety reduces, and complete machine cost reduces;
2. charging requirement reduces, and can charge, also can charge to POS with mobile phone charging adapter, make the use of POS more convenient with common portable power source or charger baby to POS, universal;
3. whether this circuit can access normally by monitoring battery at any time, avoids POS normally to work;
4. voltage protection circuit can judge the battery of access, if the access of conventional P OS battery, and meeting power themselves down, facility self-protecting.
Above-mentioned execution mode is only preferred implementation of the present utility model; can not limit the scope of the utility model protection with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present utility model all belong to the utility model scope required for protection.
Claims (9)
1. a POS power circuit, the charging circuit comprise battery, charging to battery and the battery protecting circuit be connected with battery two ends, characterized by further comprising:
The USB interface be connected with charging circuit input;
Be connected with battery output, for the overvoltage crowbar preventing cell output voltage too high;
Be connected with battery output, overvoltage crowbar output, for the switching circuit of powering to POS.
2. POS power circuit according to claim 1, is characterized in that: described overvoltage crowbar comprises the first triode, the first resistance, the second resistance and diode; The base stage of this first triode is connected with the anode of diode by the first resistance, its collector electrode is connected with the negative electrode of diode by the second resistance, its grounded emitter, and the negative electrode of diode is connected with battery protecting circuit.
3. POS power circuit according to claim 2, is characterized in that: described switching circuit comprises the second triode, field effect transistor, the 3rd resistance and the 4th resistance; The base stage of this second triode is connected with the collector electrode of the first triode, its collector electrode is connected with the grid of field effect transistor, its grounded emitter is also connected with the collector electrode of the first triode by the 3rd resistance; 4th resistance two ends are connected with the collector electrode of the second triode, the source electrode of field effect transistor respectively; The source electrode of this field effect transistor is connected with battery protecting circuit, drain extraction power output end.
4. POS power circuit according to claim 3, is characterized in that: described battery protecting circuit comprises the 5th resistance, the 6th resistance, the 7th resistance and double diode; The input of this double diode is connected with the output of battery by the 5th resistance, by the 6th grounding through resistance, its output is connected with the base stage of the second triode by the 7th resistance.
5. POS power circuit according to claim 1, is characterized in that: the earth terminal of described battery is connected with for judging the decision circuitry whether battery accesses.
6. POS power circuit according to claim 5, is characterized in that: described decision circuitry comprises the 8th resistance and the 9th resistance; The earth terminal of described battery is connected with charging circuit by the 8th resistance, draw the battery detecting end for exporting battery access signal by the 9th resistance.
7. POS power circuit according to claim 1, is characterized in that: described battery is connected with the testing circuit for detecting battery electric quantity.
8. POS power circuit according to claim 7, is characterized in that: described testing circuit comprises the tenth resistance, the 11 resistance, the first electric capacity and the second electric capacity; The output of described battery is connected with the tenth resistance, the first electric capacity and the second electric capacity; Tenth resistance is connected with the 11 resistance, and draws the electric power detection end for exporting battery electric quantity signal; 11 grounding through resistance.
9. the POS power circuit according to any one of claim 1 to 8, is characterized in that: described battery is lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520176680.2U CN204517446U (en) | 2015-03-26 | 2015-03-26 | A kind of POS power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520176680.2U CN204517446U (en) | 2015-03-26 | 2015-03-26 | A kind of POS power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204517446U true CN204517446U (en) | 2015-07-29 |
Family
ID=53715382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520176680.2U Expired - Fee Related CN204517446U (en) | 2015-03-26 | 2015-03-26 | A kind of POS power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204517446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462227A (en) * | 2018-03-07 | 2018-08-28 | 深圳市亿道数码技术有限公司 | Realize the control system of the bis- chargings of DC and Micro USB |
-
2015
- 2015-03-26 CN CN201520176680.2U patent/CN204517446U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462227A (en) * | 2018-03-07 | 2018-08-28 | 深圳市亿道数码技术有限公司 | Realize the control system of the bis- chargings of DC and Micro USB |
| CN108462227B (en) * | 2018-03-07 | 2023-11-21 | 深圳市亿道数码技术有限公司 | Control system for realizing DC and Micro USB double charging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20190326 |