CN204391819U - Protective circuit and have this protective circuit power brick, charging combination, power consumption equipment - Google Patents
Protective circuit and have this protective circuit power brick, charging combination, power consumption equipment Download PDFInfo
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- CN204391819U CN204391819U CN201520062285.1U CN201520062285U CN204391819U CN 204391819 U CN204391819 U CN 204391819U CN 201520062285 U CN201520062285 U CN 201520062285U CN 204391819 U CN204391819 U CN 204391819U
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Abstract
The utility model discloses a kind of protective circuit, comprising: first input end, the second input, the first output and the second output; Protective circuit also comprises: the first resistance, is connected between first input end and the second input; Second resistance, is connected between first input end and the second input; First field effect transistor, its drain electrode is connected with first input end, and source electrode is connected with the first output, and grid is connected with the second end; Second field effect transistor, its drain electrode is connected with first input end, and source electrode is connected with the second output, and grid is connected with the 4th end; 3rd field effect transistor, its drain electrode is connected with the second input, and source electrode is connected with the first output, and grid is connected with first end; 4th field effect transistor, its drain electrode is connected with the second input, and source electrode is connected with the second output, grid and three-terminal link.Protective circuit of the present utility model can make the relative charger of power brick just connect or reversal connection all can realize charging.
Description
Technical field
The utility model relates to a kind of protective circuit, be specifically related to a kind of protective circuit and have this protective circuit power brick, charging combination, power consumption equipment.
Background technology
The shell of power brick is provided with two power brick terminals for contacting with the positive charging terminal of charger, negative charging terminal.Under normal circumstances, two power brick terminals in existing power brick have positive and negative dividing, so just the positive battery bag terminal of power brick must be contacted with the positive charging terminal of charger, the negative battery bag terminal of power brick contacts with the negative charging terminal of charger and could realize charging, and could realize power brick and be filled with electricity when that is to say and only have the relative charger of power brick just to connect.And when reversal connection, that is to say that the negative battery bag terminal of power brick contacts with the positive charging terminal of charger, when the positive battery bag terminal of power brick contacts with the negative charging terminal of charger, then can not realize charger and charge to power brick, even may damage power brick or charger.
Summary of the invention
For solving the deficiencies in the prior art, the purpose of this utility model is that providing a kind of can make the relative charger of power brick just connect or the equal protective circuit that can realize charging of reversal connection.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
A kind of protective circuit, comprising: first input end, the second input, the first output and the second output;
Protective circuit also comprises:
First resistance, comprises and makes it be connected to first end between first input end and the second input and the second end;
Second resistance, comprises and makes it be connected to the 3rd end between first input end and the second input and the 4th end;
First field effect transistor, comprises the first source electrode first draining, be connected with the first output and the first grid be connected with the second end of the first resistance that are connected with first input end;
Second field effect transistor, comprises the second source electrode second draining, be connected with the second output and the second grid be connected with the 4th end of the second resistance that are connected with first input end;
3rd field effect transistor, comprises the 3rd source electrode the 3rd draining, be connected with the first output and the 3rd grid be connected with the first end of the first resistance that are connected with the second input;
4th field effect transistor, comprises the 4th grid of the 4th source electrode the 4th draining, be connected with the second output that is connected with the second input and the three-terminal link with the second resistance.
Wherein, first end is connected with first input end, and the second end is connected with the second input, and the 3rd end is connected with first input end, and the 4th end is connected with the second input.
Further, the first field effect transistor and the 3rd field effect transistor are N channel-type, and the second field effect transistor and the 4th field effect transistor are P channel-type.
Further, the first field effect transistor and the 3rd field effect transistor are P channel-type, and the second field effect transistor and the 4th field effect transistor are N channel-type.
Further; protective circuit also comprises: four the 3rd resistance, and four the 3rd resistance are series between first input end and the first resistance, between first input end and the second resistance, between the second input and the first resistance and between the second input and the second resistance respectively.
Further, the ratio of the resistance value of the first resistance and the 3rd resistance is more than or equal to 10; The ratio of the resistance value of the second resistance and the 3rd resistance is more than or equal to 10.
Further; protective circuit also comprises: four voltage stabilizing didoes, and four voltage stabilizing didoes are parallel between the first source electrode of the first field effect transistor and first grid respectively, between the second source electrode of the second field effect transistor and second grid, between the 3rd source electrode of the 3rd field effect transistor and the 3rd grid and between the 4th source electrode of the 4th field effect transistor and the 4th grid.
Further, the burning voltage of voltage stabilizing didoe is less than or equal to 10V.
The utility model also proposes a kind of power brick, comprising: battery core module, and also comprise above protective circuit, battery core module comprises positive pole and negative pole, and the first output in protective circuit is connected with positive pole, and the second output in institute's protective circuit is connected with negative pole; Power brick also comprises: the first power brick terminal and the second power brick terminal, and the first power brick terminal is connected with first input end, and the second power brick terminal is connected with the second input.
The utility model also proposes a kind of charging combination, comprise charger and power brick, power brick comprises: battery core module, power brick also comprises above-described protective circuit, battery core module comprises positive pole and negative pole, the first output in protective circuit is connected with positive pole, and the second output in protective circuit is connected with negative pole; Power brick also comprises: the first power brick terminal and the second power brick terminal, and the first power brick terminal is connected with first input end, and the second power brick terminal is connected with the second input; Charger comprises: the first charging terminal and the second charging terminal, first charging terminal is connected with any one in the first power brick terminal and the second power brick terminal, and the second charging terminal is connected with the another one in the first power brick terminal and the second power brick terminal.
The utility model also proposes a kind of power consumption equipment, comprise: equipment body and battery core module, also comprise above-described protective circuit, and battery core module comprises positive pole and negative pole, the first output in protective circuit is connected with positive pole, and the second output in protective circuit is connected with negative pole; Power consumption equipment also comprises: the first arrangement terminal and the second arrangement terminal, and the first arrangement terminal is connected with first input end, and the second arrangement terminal is connected with the second input.
Usefulness of the present utility model is; protective circuit can make power brick relative charger just connecing or reversal connection time; all can realizing charger to charge to power brick, that is to say that power brick can consider the corresponding relation of the terminal of its terminal and charger when charging.
Accompanying drawing explanation
Figure 1 shows that the structural representation of charging combination of the present utility model;
Figure 2 shows that the structural representation of the power brick in Fig. 1;
Figure 3 shows that the electric circuit diagram of the protective circuit in power brick.
Embodiment
Shown in Fig. 3; charging combination 1 comprises charger 10 and power brick 20; charger 10 comprises the first charging terminal 11 and the second charging terminal 12, and power brick 20 comprises: the first power brick terminal 21, second power brick terminal 22, battery core module (not shown) and protective circuit 23.
First charging terminal 11 and the second charging terminal 12 are arranged on the charging shell of charger 10, first power brick terminal 21 and the second power brick terminal 22 are arranged on the battery case of power brick 20, realized charger 10 charged to power brick 20 by contacting of the first charging terminal 11 and the second charging terminal 12 and the first power brick terminal 21 and the second power brick terminal 22.
Battery core module comprises positive pole and negative pole, and protective circuit 23 comprises first input end I1, the second input I2, the first output O1, the second output O2.First input end I1 wherein in protective circuit 23 is connected with the first power brick terminal 21, and the second input I2 is connected with the second power brick terminal 22, and the first output O1 is connected with the positive pole of battery core module, and the second output O2 is connected with the negative pole of battery core module.
Protective circuit 23 also comprises: the first resistance R1, second resistance R2 and four field effect transistor.
Wherein, the first resistance R1 comprises the first end 231 and the second end 232 that are positioned at its two ends, and first end 231 and the second end 232 are for being connected to the first resistance R1 between first input end I1 and the second input I2.First end 231 and the second end 232 that is to say two of a resistance outside terminals, for being connected with external circuit.Further, first end 231 is connected with first input end I1, and the second end 232 is connected with the second input I2.
Second resistance R2 comprise be positioned at its two ends the 3rd end 233 and the 4th end the 234, three end 233 and the 4th end 234 for the second resistance R2 is connected between first input end I1 and the second input I2.3rd end 233 and the 4th end 234 are also the outside terminals of two an of resistance, for being connected with external circuit.Further, the 3rd end 233 is connected with first input end I1, and the 4th end 234 is connected with the second input I2.
Four field effect transistor comprise respectively: the first field effect transistor Q1, the second field effect transistor Q2, the 3rd field effect transistor Q3 and the 4th field effect transistor Q4.
First field effect transistor Q1 comprises: the first drain D 1, first source S 1 and first grid G1.Wherein, the first drain D 1 is connected with first input end I1, and the first source S 1 is connected with the first output O1, and first grid G1 is connected with second end 232 of the first resistance R1.
Second field effect transistor Q2 comprises: the second drain D 2, second source S 2 and second grid G2.Wherein, the second drain D 2 is connected with first input end I1, and the second source S 2 is connected with the second output O2, and second grid G2 is connected with the 4th end 234 of the second resistance R2.
3rd field effect transistor Q3 comprises: the 3rd drain D 3, the 3rd source S 3 and the 3rd grid G 3.Wherein, the 3rd drain D 3 is connected with the second input I2, and the 3rd source S 3 is connected with the first output O1, and the 3rd grid G 3 is connected with the first end 231 of the first resistance R1.
4th field effect transistor Q4 comprises: the 4th drain D 4, the 4th source S 4 and the 4th grid G 4.Wherein, the 4th drain D 4 is connected with the second input I2, and the 4th source S 4 is connected with the second output O2, and the 4th grid G 4 is connected with the 3rd end 233 of the second resistance R2.
Like this, we with the first charging terminal 11 of charger 10 for high-voltage output end, the second charging terminal 12 for low-voltage output be operation principle and the effect that example is described this protective circuit 23:
When the first power brick terminal 21 be connected with the first charging terminal 11, the second power brick terminal 22 be connected with the second charging terminal 12 time; the first input end I1 of the protective circuit 23 be connected with the first power brick terminal 21 receives high-voltage signal, and the second input I2 be connected with the second power brick terminal 22 receives low-voltage signal.At this moment, the first grid G1 be connected with second end 232 of the first resistance R1 of the first field effect transistor Q1 receives low-voltage signal, first source S 1 of the positive signal for receiving battery core module of the first field effect transistor Q1 receives high-voltage signal, thus makes to produce the voltage difference that makes the first field effect transistor Q1 conducting between first grid G1 and the first source S 1; Same, the second grid G2 be connected with the 4th end 234 of the second resistance R2 of the second field effect transistor Q2 receives low-voltage signal, second source S 2 of the negative signal for receiving battery core module of the second field effect transistor Q2 receives low-voltage signal, thus makes the voltage difference produced between second grid G2 and the second source S 2 make the second field effect transistor Q2 be in off-state.Same principle, make now the 3rd field effect transistor Q3 be in off-state, and the 4th field effect transistor Q4 is in conducting state.Therefore, in that case, first input end I1 is connected with the first output O1, second input I2 is connected with the second output O2, and the first charging terminal 11(high-voltage output end of the first power brick terminal 21 be connected with first input end I1 and charger 10) be connected, second charging terminal 12(low-voltage output of the second power brick terminal 22 be connected with the second input I2 and charger 10) be connected, first output O1 is connected with the positive pole of battery core module, second output O2 is connected with the negative pole of battery core module, thus this protective circuit 23 is passed through, first charging terminal 11(high-voltage output end of charger 10) be electrically connected with the positive pole of battery core module, second charging terminal 12(low-voltage output of charger 10) be connected with the negative electricity of battery core module, thus charger 10 can be realized to the battery core module polarity charging in power brick 20.
When the second power brick terminal 22 be connected with the first charging terminal 11, the first power brick terminal 21 be connected with the second charging terminal 12 time; the first input end I1 of the protective circuit 23 be connected with the first power brick terminal 21 receives low-voltage signal, and the second input I2 be connected with the second power brick terminal 22 receives high-voltage signal.At this moment, the 3rd grid G 3 be connected with the first end 231 of the first resistance R1 of the 3rd field effect transistor Q3 receives low-voltage signal, 3rd source S 3 of the positive signal for receiving battery core module of the 3rd field effect transistor Q3 receives high-voltage signal, thus makes to produce the voltage difference that makes the 3rd field effect transistor Q3 conducting between the 3rd grid G 3 and the 3rd source S 3; Same, the 3rd grid G 3 be connected with the 3rd end 233 of the second resistance R2 of the 4th field effect transistor Q4 receives low-voltage signal, second source S 2 of the negative signal for receiving battery core module of the 3rd field effect transistor Q3 receives low-voltage signal, thus makes the voltage difference produced between the 3rd grid G 3 and the 3rd source S 3 make the 3rd field effect transistor Q3 be in off-state.Same principle, now the first field effect transistor Q1 is in off-state, and the second field effect transistor Q2 is in conducting state.Therefore, in that case, first input end I1 is connected with the second output O2, second input I2 is connected with the first output O1, and the second charging terminal 12(low-voltage output of the first power brick terminal 21 be connected with first input end I1 and charger 10) be connected, first charging terminal 11(high-voltage output end of the second power brick terminal 22 be connected with the second input I2 and charger 10) be connected, first output O1 is connected with the positive pole of battery core module, second output O2 is connected with the negative pole of battery core module, thus this protective circuit 23 is passed through, still can make the first charging terminal 11(high-voltage output end of charger 10) be electrically connected with the positive pole of battery core module, second charging terminal 12(low-voltage output of charger 10) be connected with the negative electricity of battery core module, thus charger 10 can be realized to the battery core module polarity charging in power brick 20.
Therefore, through this protective circuit 23, first power brick terminal 21 of power brick 20 is connected with the first charging terminal 11 in charger 10 and any one in the second charging terminal 12, second power brick terminal 22 is connected with the first charging terminal 11 of charger 10 and the another one of the second charging terminal 12, all can realize charger 10 to charge to this power brick 20, in other words the first power brick terminal 21 of this power brick 20 and the second power brick terminal 22 have nothing to do with the high-voltage output end of charger 10 and the order of connection of low-voltage output, that is to say the connection not order of two terminals of power brick 20 and two terminals of charger 10, no matter just to connect or reversal connection only can realize power brick 20 and filled with electricity, avoid power brick 20 when needs charge, relative charger 10 terminal order connects the anti-problem can not filling electricity or damage power brick 20 or charger 10 with caused.
In order to realize the first field effect transistor Q1 when conducting, the second field effect transistor Q2 disconnects, and the 3rd field effect transistor Q3 disconnects and the 4th field effect transistor Q4 conducting simultaneously; And when realizing the 3rd field effect transistor Q3 conducting, 4th field effect transistor Q4 disconnects, first field effect transistor Q1 disconnects and the second field effect transistor Q2 conducting simultaneously, first field effect transistor Q1 is identical with the channel type of the 3rd field effect transistor Q3, and the second field effect transistor Q2 is identical with the type of the 4th field effect transistor Q4 and be different from the first field effect transistor Q1 and the 3rd field effect transistor Q3.Such as, the first field effect transistor Q1 and the 3rd field effect transistor Q3 is all N channel-type, and the second field effect transistor Q2 and the 4th field effect transistor Q4 is all P channel-type; Or the first field effect transistor Q1 and the 3rd field effect transistor Q3 is all P channel-type, the second field effect transistor Q2 and the 4th field effect transistor Q4 is all N channel-type.
Preferably, four the 3rd resistance R3 are also comprised in protective circuit 23, first in four the 3rd resistance R3 is connected between the first end 231 of first input end I1 and the first resistance R1, second in four the 3rd resistance R3 is connected between first input end I1 and the 3rd end 233 of the second resistance R2, the 3rd in four the 3rd resistance R3 is connected between the second input I2 and second end 232 of the first resistance R1, the 4th in four the 3rd resistance R3 is connected between the second input I2 and the 4th end 234 of the second resistance R2, and wherein the ratio of the resistance value of the first resistance R1 and the 3rd resistance R3 is more than or equal to 10, the ratio of the resistance value of the second resistance R2 and the 3rd resistance R3 is also more than or equal to 10.Like this; corresponding being connected to the circuit between the first resistance R1 and the 3rd resistance R3 or being connected on the circuit between the second resistance R2 and the 3rd resistance R3 of the grid of four field effect transistor can be made, thus the effect of dividing potential drop and protection field effect transistor can be played.
Preferably; protective circuit 23 also comprises: four voltage stabilizing didoe Z1, and four voltage stabilizing didoe Z1 are parallel between first source S 1 of the first field effect transistor Q1 and first grid G1 respectively, between second source S 2 of the second field effect transistor Q2 and second grid G2, between the 3rd source S 3 of the 3rd field effect transistor Q3 and the 3rd grid G 3 and between the 4th source S 4 of the 4th field effect transistor Q4 and the 4th grid G 4.Preferred, the burning voltage of voltage stabilizing didoe Z1 is less than or equal to 10V.By the pressure stabilization function of voltage stabilizing didoe Z1, voltage difference between the first grid G1 of the first field effect transistor Q1 and the first source S 1 is limited within the specific limits, avoid the voltage difference between first grid G1 and the first source S 1 excessive and damage the first field effect transistor Q1, same, the damage of the second field effect transistor Q2, the 3rd field effect transistor Q3 and the 4th field effect transistor Q4 is it also avoid by corresponding voltage stabilizing didoe Z1.
Above protective circuit 23 is arranged in power brick 20, certainly this protective circuit 23 also can be arranged on and be built-in with in the power consumption equipment (not shown) of battery core module, this power consumption equipment comprises equipment body and battery core module, battery core module comprises positive pole and negative pole, the first output O1 in protective circuit 23 is connected with positive pole, and the second output O2 in protective circuit 23 is connected with negative pole; Power consumption equipment also comprises: the first arrangement terminal and the second arrangement terminal, and the first arrangement terminal is connected with first input end I1, and the second arrangement terminal is connected with the second input I2.
More than show and describe general principle of the present utility model, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the utility model in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection range of the present utility model.
Claims (10)
1. a protective circuit, comprising: first input end, the second input, the first output and the second output; It is characterized in that:
Described protective circuit also comprises:
First resistance, comprises and makes it be connected to first end between described first input end and described second input and the second end;
Second resistance, comprises and makes it be connected to the 3rd end between described first input end and described second input and the 4th end;
First field effect transistor, comprises the first source electrode first draining, be connected with described first output and the first grid be connected with described second end of described first resistance that are connected with described first input end;
Second field effect transistor, comprises the second source electrode second draining, be connected with described second output and the second grid be connected with described 4th end of described second resistance that are connected with described first input end;
3rd field effect transistor, comprises the 3rd source electrode the 3rd draining, be connected with described first output and the 3rd grid be connected with the described first end of described first resistance that are connected with described second input;
4th field effect transistor, comprises the 4th grid of the 4th source electrode the 4th draining, be connected with described second output that is connected with described second input and the described three-terminal link with described second resistance;
Wherein, described first end is connected with described first input end, and described second end is connected with described second input, and described 3rd end is connected with described first input end, and described 4th end is connected with described second input.
2. protective circuit according to claim 1, is characterized in that, described first field effect transistor and described 3rd field effect transistor are N channel-type, and described second field effect transistor and described 4th field effect transistor are P channel-type.
3. protective circuit according to claim 1, is characterized in that, described first field effect transistor and described 3rd field effect transistor are P channel-type, and described second field effect transistor and described 4th field effect transistor are N channel-type.
4. protective circuit according to claim 1; it is characterized in that; described protective circuit also comprises: four the 3rd resistance, and four described 3rd resistance are series between described first input end and described first resistance, between described first input end and described second resistance, between described second input and described first resistance and between described second input and described second resistance respectively.
5. protective circuit according to claim 4, is characterized in that, the ratio of the resistance value of described first resistance and described 3rd resistance is more than or equal to 10; The ratio of the resistance value of described second resistance and described 3rd resistance is more than or equal to 10.
6. protective circuit according to claim 1; it is characterized in that; described protective circuit also comprises: four voltage stabilizing didoes, and four described voltage stabilizing didoes are parallel between described first source electrode of described first field effect transistor and described first grid respectively, between described second source electrode of described second field effect transistor and described second grid, between described 3rd source electrode of described 3rd field effect transistor and described 3rd grid and between described 4th source electrode of described 4th field effect transistor and described 4th grid.
7. protective circuit according to claim 6, is characterized in that, the burning voltage of described voltage stabilizing didoe is less than or equal to 10V.
8. a power brick, comprise: battery core module, it is characterized in that, also comprise the protective circuit as described in claim 1 to 7 any one, described battery core module comprises positive pole and negative pole, described first output in described protective circuit is connected with described positive pole, and the second output in described protective circuit is connected with described negative pole; Described power brick also comprises: the first power brick terminal and the second power brick terminal, and described first power brick terminal is connected with described first input end, and described second power brick terminal is connected with described second input.
9. a charging combination, comprise charger and power brick, described power brick comprises: battery core module, it is characterized in that, described power brick also comprises the protective circuit as described in claim 1 to 7 any one, described battery core module comprises positive pole and negative pole, and described first output in described protective circuit is connected with described positive pole, and described second output in described protective circuit is connected with described negative pole; Described power brick also comprises: the first power brick terminal and the second power brick terminal, and described first power brick terminal is connected with described first input end, and described second power brick terminal is connected with described second input; Described charger comprises: the first charging terminal and the second charging terminal, described first charging terminal is connected with any one in described first power brick terminal and described second power brick terminal, and described second charging terminal is connected with the another one in described first power brick terminal and described second power brick terminal.
10. a power consumption equipment, comprise: equipment body and battery core module, it is characterized in that, also comprise the protective circuit as described in claim 1 to 7 any one, described battery core module comprises positive pole and negative pole, described first output in described protective circuit is connected with described positive pole, and described second output in described protective circuit is connected with described negative pole; Described power consumption equipment also comprises: the first arrangement terminal and the second arrangement terminal, and described first arrangement terminal is connected with described first input end, and described second arrangement terminal is connected with described second input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062285.1U CN204391819U (en) | 2015-01-28 | 2015-01-28 | Protective circuit and have this protective circuit power brick, charging combination, power consumption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062285.1U CN204391819U (en) | 2015-01-28 | 2015-01-28 | Protective circuit and have this protective circuit power brick, charging combination, power consumption equipment |
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| Publication Number | Publication Date |
|---|---|
| CN204391819U true CN204391819U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520062285.1U Active CN204391819U (en) | 2015-01-28 | 2015-01-28 | Protective circuit and have this protective circuit power brick, charging combination, power consumption equipment |
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| Country | Link |
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| CN (1) | CN204391819U (en) |
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2015
- 2015-01-28 CN CN201520062285.1U patent/CN204391819U/en active Active
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Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Patentee after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee before: NANJING CHERVON INDUSTRY Co.,Ltd. |
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| CP03 | Change of name, title or address |