CN203352136U - Overvoltage/undervoltage protection circuit, protection socket and terminal - Google Patents
Overvoltage/undervoltage protection circuit, protection socket and terminal Download PDFInfo
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- CN203352136U CN203352136U CN 201320463447 CN201320463447U CN203352136U CN 203352136 U CN203352136 U CN 203352136U CN 201320463447 CN201320463447 CN 201320463447 CN 201320463447 U CN201320463447 U CN 201320463447U CN 203352136 U CN203352136 U CN 203352136U
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Abstract
The embodiment of the utility model discloses an overvoltage/undervoltage protection circuit, a protection socket and a terminal, wherein the overvoltage/undervoltage protection circuit includes a voltage stabilizing circuit, a sampling circuit, a judging circuit and an indicating switching circuit, wherein the voltage stabilizing circuit is connected with the sampling circuit, the sampling circuit is connected with the judging circuit, and the judging circuit is connected with the indicating switching circuit. With the overvoltage/undervoltage protection circuit, the protection socket and the terminal of the utility model adopted, overvoltage/undervoltage protection can be realized with low cost.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of over-and under-voltage protective circuit, protection socket and terminal.
Background technology
Household electricity of today adopts the electric main of 220V substantially, but 220V power supply sometimes can certain floating occur because of a variety of causes, such as being less than 180V or being greater than the phenomenon of 240V, at this moment may damage the electrical equipment of being powered by common socket.Especially in places such as rural areas, the line voltage instability problem is more outstanding, when supply voltage is too high or too low, just may cause electrical appliance work undesired, even damage.
In the prior art, can pass through the method for the built-in microcontroller of socket with protection overvoltage or under-voltage situation, but add microcontroller, can make the cost of socket improve, be unfavorable for promoting.
The utility model content
The utility model embodiment provides a kind of over-and under-voltage protective circuit, protection socket and terminal, can realize the over-and under-voltage protection by single relay simultaneously, and with low cost.
The utility model embodiment provides a kind of over-and under-voltage protective circuit, comprising:
Voltage stabilizing circuit, sample circuit, decision circuitry and indication commutation circuit;
Described voltage stabilizing circuit is connected with described sample circuit, and described sample circuit is connected with described decision circuitry, described decision circuitry and described indication commutation circuit;
Described indication commutation circuit comprises: inverter, the first diode, the second diode, the 3rd diode, the first resistance, the second resistance, the first electric capacity and relay;
The first pin of described inverter and the anodic bonding of described the second diode, the negative electrode of described the first diode is connected to the anode of described the second diode by the first resistance, the second pin of described inverter is connected with described decision circuitry respectively with the anode of described the first diode, the negative electrode of described the second diode is connected with an end of described the second resistance and an end of described the first electric capacity respectively, the other end of described the second resistance connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the other end of described the first electric capacity connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the second pin of the anode of described the 3rd diode and described relay is connected to voltage stabilizing circuit in the lump, one end of the switch of described relay connects zero line, the other end of the switch of described relay is connected in an end of power supply, the other end of power supply is connected with live wire,
Described decision circuitry judges whether in overvoltage or under-voltage condition according to the magnitude of voltage of described sample circuit collection, and judged result is sent to described indication commutation circuit;
Described indication commutation circuit is controlled deenergization according to the judged result of described decision circuitry.
Correspondingly, the utility model embodiment also provides a kind of protection socket, comprises the over-and under-voltage protective circuit, and described over-and under-voltage protective circuit comprises:
Voltage stabilizing circuit, sample circuit, decision circuitry and indication commutation circuit;
Described voltage stabilizing circuit is connected with described sample circuit, and described sample circuit is connected with described decision circuitry, described decision circuitry and described indication commutation circuit;
Described indication commutation circuit comprises: inverter, the first diode, the second diode, the 3rd diode, the first resistance, the second resistance, the first electric capacity and relay;
The first pin of described inverter and the anodic bonding of described the second diode, the negative electrode of described the first diode is connected to the anode of described the second diode by the first resistance, the second pin of described inverter is connected with described decision circuitry respectively with the anode of described the first diode, the negative electrode of described the second diode is connected with an end of described the second resistance and an end of described the first electric capacity respectively, the other end of described the second resistance connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the other end of described the first electric capacity connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the second pin of the anode of described the 3rd diode and described relay is connected to voltage stabilizing circuit in the lump, one end of the switch of described relay connects zero line, the other end of the switch of described relay is connected in an end of power supply, the other end of power supply is connected with live wire,
Described decision circuitry judges whether in overvoltage or under-voltage condition according to the magnitude of voltage of described sample circuit collection, and judged result is sent to described indication commutation circuit;
Described indication commutation circuit is controlled deenergization according to the judged result of described decision circuitry.
Correspondingly, the utility model embodiment also provides a kind of terminal, comprises above-mentioned over-and under-voltage protective circuit and charging circuit, wherein:
Described over-and under-voltage protective circuit is connected with described charging circuit.
The utility model embodiment can judge this circuit in overvoltage condition or under-voltage condition by decision circuitry; the indication commutation circuit can be controlled deenergization according to the judged result of decision circuitry; and the over-and under-voltage protective circuit that the utility model embodiment provides is to utilize single relay to realize the circuit of realizing of overvoltage and under-voltage protection simultaneously; make circuit structure simple, with low cost; can be widely used in socket, to play the over-and under-voltage protection.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of over-and under-voltage protective circuit of providing of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of a kind of over-and under-voltage protective circuit of providing of the utility model embodiment;
Fig. 3 is a kind of terminal that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Referring to Fig. 1, is the structural representation of a kind of over-and under-voltage protective circuit of providing of the utility model embodiment, and described over-and under-voltage protective circuit can comprise: voltage stabilizing circuit 1, sample circuit 2, decision circuitry 3 and indication commutation circuit 4;
Described voltage stabilizing circuit 1 is connected with described sample circuit 2, and described sample circuit 2 is connected with described decision circuitry 3, described decision circuitry 3 and described indication commutation circuit 4.
Concrete, can carry out step-down to supply voltage by described voltage stabilizing circuit 1, and stable output voltage so that being provided, reference voltage is also given described indication commutation circuit 4 power supplies simultaneously.The magnitude of voltage that described decision circuitry 3 can gather according to described sample circuit 2 judges whether in overvoltage or under-voltage condition; and judged result is sent to described indication commutation circuit 4; control deenergization by described indication commutation circuit 4 according to the judged result of described decision circuitry 3 again, to reach the effect of over-and under-voltage protection.
Further, refer to again Fig. 2, be the circuit theory diagrams of a kind of over-and under-voltage protective circuit of providing of the utility model embodiment, the described indication commutation circuit 4 in described over-and under-voltage protective circuit specifically comprises: inverter U1, the first diode D7, the second diode D8, the 3rd diode D9, the first resistance R 6, the second resistance R 7, the first capacitor C 4 and relay K;
Wherein, described the first diode D7 and the second diode D8 can be all light-emitting diode.
The first pin 41 of described inverter U1 and the anodic bonding of described the second diode D8, the negative electrode of described the first diode D7 is connected to the anode of described the second diode D8 by the first resistance R 6, the second pin 42 of described inverter U1 and the anode of described the first diode D7 are connected with described decision circuitry 3 respectively, the negative electrode of described the second diode D8 is connected with an end of described the first capacitor C 4 with an end of described the second resistance R 7 respectively, the other end of described the second resistance R 7 connects respectively the negative electrode of described the 3rd diode D9 and the first pin 31 of described relay K, the other end of described the first capacitor C 4 connects respectively the negative electrode of described the 3rd diode D9 and the first pin 31 of described relay K, the second pin 32 of the anode of described the 3rd diode D9 and described relay K is connected to voltage stabilizing circuit 1 in the lump, one end of the K switch of described relay K-1 connects zero line 44, the other end of the K switch of described relay K-1 is connected in an end of power supply, the other end of power supply is connected with live wire 43.
Wherein, the described voltage stabilizing circuit 1 in described over-and under-voltage protective circuit specifically comprises: the second capacitor C 1, the 3rd capacitor C 2, rectifier bridge D1 and the 4th diode D3; Wherein, described the 4th diode D3 can be voltage stabilizing didoe;
One end of power supply is connected to the second pin 12 of rectifier bridge D1 by described the second capacitor C 1;
The negative electrode of described the 4th diode D3 is connected with the first pin 11 of described rectifier bridge D1, and the anode of described the 4th diode D3 is connected with the 4th pin 14 of described rectifier bridge D1;
The 3rd pin 13 of described rectifier bridge D1 connects respectively the K switch-1 of relay K and the other end of power supply;
One end of described the 3rd capacitor C 2 is connected with described decision circuitry 3 with the first pin 11 of described rectifier bridge D1 respectively, and the other end of described the 3rd capacitor C 2 connects respectively anode and the described sample circuit 2 of described the 4th diode D3.
Wherein, the described sample circuit 2 in described over-and under-voltage protective circuit specifically comprises: the 5th diode D2, the 3rd resistance R 1, the 4th resistance R 2, the 5th resistance R 3 and the 4th capacitor C 3;
Wherein, described the 4th resistance R 2 and the 5th resistance R 3 can be all adjustable resistance;
The anodic bonding of described the 5th diode D2 is in an end of described power supply, the negative electrode of described the 5th diode D2 is connected with an end of the 4th capacitor C 3 by the 3rd resistance R 1, and the other end of described the 4th capacitor C 3 is connected to the 4th pin 14 of the described rectifier bridge D1 of described voltage stabilizing circuit 1;
One end of described the 4th resistance R 2 is connected in an end of the 4th capacitor C 3, and the other end of described the 4th resistance R 2 is connected in an end of the 5th resistance R 3, and the another end of described the 4th resistance R 2 is connected with described decision circuitry 3;
The other end of described the 5th resistance R 3 is connected to the 4th pin 14 of the described rectifier bridge D1 of described voltage stabilizing circuit 1, and the another end of described the 5th resistance R 3 is connected with described decision circuitry 3.
Wherein, the described decision circuitry 3 in described over-and under-voltage protective circuit specifically comprises: the 6th diode D4, the 7th diode D5, the 8th diode D6, triode Q1, the 6th resistance R 4, the 7th resistance R 5 and the 8th resistance R 8;
Wherein, described the 6th diode D4 can be voltage-stabiliser tube;
The negative electrode of described the 6th diode D4 is connected in the 4th resistance R 2 in described sample circuit 2, the anode of described the 6th diode D4 is connected to the base stage of triode Q1 by the 6th resistance R 4, the emitter of described triode Q1 is connected with the 4th pin 14 of the described rectifier bridge D1 of described voltage stabilizing circuit 1;
The negative electrode of described the 7th diode D5 is connected in the 5th resistance R 3 in described sample circuit 2, and the anode of described the 7th diode D5 is connected to the anode of described the 8th diode D6 and the inverter U1 of described indication commutation circuit 4;
The negative electrode of described the 8th diode D6 is the collector electrode of connecting triode Q1 and an end of the 7th resistance R 5 respectively, and the other end of described the 7th resistance R 5 connects respectively the first pin 11 of the described rectifier bridge D1 of the anode of described the first diode D7 of described indication commutation circuit 4 and described voltage stabilizing circuit 1;
One end of described the 8th resistance R 8 and the anodic bonding of described the 8th diode D6, the anodic bonding of the described first diode D7 of the other end of described the 8th resistance R 8 and described indication commutation circuit 4.
Concrete, described voltage stabilizing circuit 1 plays the effect of capacitance decompression, bridge rectifier and voltage stabilizing, and wherein, described voltage stabilizing circuit 1 can provide reference voltage, and gives the power supply of the inverter U1 in described indication commutation circuit 4 simultaneously.
When power supply is electric main, and when described electric main is normal range (NR), for example electric main is more than or equal to 180V and is less than or equal to the situation of 240V, and now the 4th resistance R 2 sampling values are lower, make the 6th diode D4 cut-off, so triode Q1 and the 8th diode D6 all end.Simultaneously, the sampled voltage of the 5th resistance R 3, higher than the second pin 42 voltages of described inverter U1, makes the 7th diode D5 cut-off.Because the second pin 42 of described inverter U1 now is high level, so the first pin 41 of described inverter U1 is low level output, make described the first diode D7 lamp bright, described the second diode D8 lamp goes out.Now the first pin 31 of relay K is low level, makes the K switch-1 of relay K keep normally off, circuit normal power supply.Wherein, described the first diode D7 and described the second diode D8 are indicator light, the bright electrical appliance normal power supply that represents of described the first diode D7, and described the second diode D8 is bright represents that electrical appliance is in guard mode.Wherein, described the 4th resistance R 2 is the overvoltage sampling resistor, and described the 5th resistance R 3 is under-voltage sampling resistor.In the debug phase, can, by described the 4th resistance R 2 lower positions of furnishing dividing potential drop, make the 6th not conducting of diode D4 in the time of in the normal range (NR) of electric main; In the mode stage, described the 5th resistance R 3 can be transferred to a suitable position equally, while making electric main in normal range (NR), the sampled voltage of described the 5th resistance R 3 is higher than the second pin 42 voltages of described inverter U1.
When electric main, during higher than 240V, in overvoltage condition, now the 4th resistance R 2 sampled voltage values are higher, and the 6th diode D4 is breakdown, makes triode Q1 conducting.The 8th diode D6 conducting simultaneously, the 7th diode D5 cut-off, the second pin 42 that makes described inverter U1 is low level, the first pin 41 output high level of so described inverter U1, make described the first diode D7 lamp go out, described the second diode D8 lamp is bright.The first pin 31 of described relay K is high level simultaneously, makes the K switch-1 of described relay K disconnect, and circuit, by automatic disconnection, starts overvoltage protection.
When electric main, during lower than 180V, in under-voltage condition, now described the 4th resistance R 2 samplings are too low, the 6th diode D4 cut-off.Described the 5th resistance R 3 sampled voltages descend, described the 7th diode D5 conducting, making the second pin 42 of described inverter U1 is low level, the first pin 41 of described inverter U1 is high level, thereby make described the first diode D7 lamp go out, described the second diode D8 lamp is bright.The first pin 31 of described relay K is high level simultaneously, makes the K switch-1 of described relay K disconnect, and circuit, by automatic disconnection, starts under-voltage protection.
Wherein, described the first capacitor C 4 and the second resistance R 7 are in order to reduce the power consumption of described relay K, and described the first capacitor C 4 provides large electric weight to carry out the adhesive action to described relay K, after adhesive, described the second resistance R 7 offers the attract current that described relay K is less, to maintain adhesive.On the other hand; the over-and under-voltage protective circuit that the utility model embodiment provides has the rear telegram in reply delay protection function that has a power failure; the charging of described the 3rd capacitor C 2 is faster than described the 4th capacitor C 3; while sending a telegram in reply after outage; described the 3rd capacitor C 2 is full of electricity very soon, and described the 4th capacitor C 3 charging voltage risings, until after described the 4th capacitor C 3 is charged to normal voltage; the K switch of described relay K-1 is just closed, to play, avoids the impact of line surge on electrical appliance.
The over-and under-voltage protective circuit that the utility model embodiment provides is simple in structure, cost is low; can be widely used in socket; to play the over-and under-voltage protection; simultaneously by increasing light-emitting diode; the effect of status indicator lamp that made circuit possess; and after grid cut-off, can play the effect of Delayed conducting, effectively prevent the impact on electrical appliance of the surge brought in the electrical network.
The utility model embodiment also provides a kind of protection socket; described protection socket can comprise in above-mentioned Fig. 1 or Fig. 2 the over-and under-voltage protective circuit that arbitrary embodiment is corresponding; the specific implementation of over-and under-voltage protective circuit can, referring to above-described embodiment, repeat no more here.
The over-and under-voltage protective circuit that the utility model embodiment provides is simple in structure, cost is low, can be widely used in socket, and to play over-and under-voltage protection, simultaneously by increasing light-emitting diode, the effect of status indicator lamp that made circuit possess.
The over-and under-voltage protective circuit that the utility model embodiment provides is not only used in socket; can also be used in electrical appliance; now without using voltage stabilizing circuit 1; directly, by the direct current supply of electrical appliance inside, sample circuit 2, decision circuitry 3 and indication commutation circuit 4 can be worked.
Concrete, then refer to Fig. 3, and be a kind of terminal that the utility model embodiment provides, described terminal can comprise over-and under-voltage protective circuit 100 and charging circuit 200, wherein, described over-and under-voltage protective circuit 100 is connected with described charging circuit 200.Described over-and under-voltage protective circuit 100 can be the over-and under-voltage protective circuit that in above-mentioned Fig. 1 or Fig. 2, arbitrary embodiment is corresponding; wherein; described over-and under-voltage protective circuit 100 specifically can comprise voltage stabilizing circuit 1, sample circuit 2, decision circuitry 3 and indication commutation circuit 4 as shown in Figure 1; the specific implementation of described voltage stabilizing circuit 1, sample circuit 2, decision circuitry 3 and indication commutation circuit 4 can, referring to above-described embodiment, repeat no more here.Described over-and under-voltage protective circuit 100 can be controlled external power source and is connected or disconnects with described charging circuit 200, when described over-and under-voltage protective circuit 100 detects outer power voltage when too high or too low, can control being connected of disconnecting external power supply and described charging circuit 200; The outer power voltage detected when described over-and under-voltage protective circuit 100 is during in normal value; control external power source and normally be connected with described charging circuit 200, thereby make described over-and under-voltage protective circuit 100 can guarantee to input to the voltage stabilization of charging circuit 200 in specific interval range.
The over-and under-voltage protective circuit 100 that the utility model embodiment provides is simple in structure, cost is low; can be applied in terminal; terminal is played to over-and under-voltage protection, and can be stabilized in specific interval range by the voltage that described over-and under-voltage protective circuit 100 has guaranteed to input to the charging circuit 200 in terminal.This terminal can be the electronic equipments such as computer, mobile phone.
The module of the utility model embodiment or unit, can pass through universal integrated circuit, CPU(Central Processing Unit for example, central processing unit), or realize by ASIC (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)).
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise the flow process as the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only the utility model preferred embodiment, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belong to the scope that the utility model is contained.
Claims (9)
1. an over-and under-voltage protective circuit, is characterized in that, comprising:
Voltage stabilizing circuit, sample circuit, decision circuitry and indication commutation circuit;
Described voltage stabilizing circuit is connected with described sample circuit, and described sample circuit is connected with described decision circuitry, described decision circuitry and described indication commutation circuit;
Described indication commutation circuit comprises: inverter, the first diode, the second diode, the 3rd diode, the first resistance, the second resistance, the first electric capacity and relay;
The first pin of described inverter and the anodic bonding of described the second diode, the negative electrode of described the first diode is connected to the anode of described the second diode by the first resistance, the second pin of described inverter is connected with described decision circuitry respectively with the anode of described the first diode, the negative electrode of described the second diode is connected with an end of described the second resistance and an end of described the first electric capacity respectively, the other end of described the second resistance connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the other end of described the first electric capacity connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the second pin of the anode of described the 3rd diode and described relay is connected to voltage stabilizing circuit in the lump, one end of the switch of described relay connects zero line, the other end of the switch of described relay is connected in an end of power supply, the other end of power supply is connected with live wire,
Described decision circuitry judges whether in overvoltage or under-voltage condition according to the magnitude of voltage of described sample circuit collection, and judged result is sent to described indication commutation circuit;
Described indication commutation circuit is controlled deenergization according to the judged result of described decision circuitry.
2. circuit as claimed in claim 1, is characterized in that, described voltage stabilizing circuit comprises: the second electric capacity, the 3rd electric capacity, rectifier bridge and the 4th diode;
One end of power supply is connected to the second pin of rectifier bridge by described the second electric capacity;
The negative electrode of described the 4th diode is connected with the first pin of described rectifier bridge, and the anode of described the 4th diode is connected with the 4th pin of described rectifier bridge;
The 3rd pin of described rectifier bridge connects respectively the switch of relay and the other end of power supply;
One end of described the 3rd electric capacity is connected with described decision circuitry with the first pin of described rectifier bridge respectively, and the other end of described the 3rd electric capacity connects respectively anode and the described sample circuit of described the 4th diode.
3. circuit as claimed in claim 1, is characterized in that, described sample circuit comprises: the 5th diode, the 3rd resistance, the 4th resistance, the 5th resistance and the 4th electric capacity;
The anodic bonding of described the 5th diode is in an end of described power supply, and the negative electrode of described the 5th diode is connected with an end of the 4th electric capacity by the 3rd resistance, and the other end of described the 4th electric capacity is connected to the 4th pin of the described rectifier bridge of described voltage stabilizing circuit;
One end of described the 4th resistance is connected in an end of the 4th electric capacity, and the other end of described the 4th resistance is connected in an end of the 5th resistance, and the another end of described the 4th resistance is connected with described decision circuitry;
The other end of described the 5th resistance is connected to the 4th pin of the described rectifier bridge of described voltage stabilizing circuit, and the another end of described the 5th resistance is connected with described decision circuitry.
4. circuit as claimed in claim 1, is characterized in that, described decision circuitry comprises: the 6th diode, the 7th diode, the 8th diode, triode, the 6th resistance, the 7th resistance and the 8th resistance;
The negative electrode of described the 6th diode is connected in the 4th resistance in described sample circuit, the anode of described the 6th diode is connected to the base stage of triode by the 6th resistance, the emitter of described triode is connected with the 4th pin of the described rectifier bridge of described voltage stabilizing circuit;
The negative electrode of described the 7th diode is connected in the 5th resistance in described sample circuit, and the anode of described the 7th diode is connected to the anode of described the 8th diode and the inverter of described indication commutation circuit;
The negative electrode of described the 8th diode is the collector electrode of connecting triode and an end of the 7th resistance respectively, and the other end of described the 7th resistance connects respectively the first pin of the described rectifier bridge of the anode of described the first diode of described indication commutation circuit and described voltage stabilizing circuit;
One end of described the 8th resistance and the anodic bonding of described the 8th diode, the anodic bonding of described first diode of the other end of described the 8th resistance and described indication commutation circuit.
5. a protection socket, is characterized in that, comprise the over-and under-voltage protective circuit, described over-and under-voltage protective circuit comprises:
Voltage stabilizing circuit, sample circuit, decision circuitry and indication commutation circuit;
Described voltage stabilizing circuit is connected with described sample circuit, and described sample circuit is connected with described decision circuitry, described decision circuitry and described indication commutation circuit;
Described indication commutation circuit comprises: inverter, the first diode, the second diode, the 3rd diode, the first resistance, the second resistance, the first electric capacity and relay;
The first pin of described inverter and the anodic bonding of described the second diode, the negative electrode of described the first diode is connected to the anode of described the second diode by the first resistance, the second pin of described inverter is connected with described decision circuitry respectively with the anode of described the first diode, the negative electrode of described the second diode is connected with an end of described the second resistance and an end of described the first electric capacity respectively, the other end of described the second resistance connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the other end of described the first electric capacity connects respectively the negative electrode of described the 3rd diode and the first pin of described relay, the second pin of the anode of described the 3rd diode and described relay is connected to voltage stabilizing circuit in the lump, one end of the switch of described relay connects zero line, the other end of the switch of described relay is connected in an end of power supply, the other end of power supply is connected with live wire,
Described decision circuitry judges whether in overvoltage or under-voltage condition according to the magnitude of voltage of described sample circuit collection, and judged result is sent to described indication commutation circuit;
Described indication commutation circuit is controlled deenergization according to the judged result of described decision circuitry.
6. protection socket as claimed in claim 5, is characterized in that, described voltage stabilizing circuit comprises: the second electric capacity, the 3rd electric capacity, rectifier bridge and the 4th diode;
One end of power supply is connected to the second pin of rectifier bridge by described the second electric capacity;
The negative electrode of described the 4th diode is connected with the first pin of described rectifier bridge, and the anode of described the 4th diode is connected with the 4th pin of described rectifier bridge;
The 3rd pin of described rectifier bridge connects respectively the switch of relay and the other end of power supply;
One end of described the 3rd electric capacity is connected with described decision circuitry with the first pin of described rectifier bridge respectively, and the other end of described the 3rd electric capacity connects respectively anode and the described sample circuit of described the 4th diode.
7. protection socket as claimed in claim 5, is characterized in that, described sample circuit comprises: the 5th diode, the 3rd resistance, the 4th resistance, the 5th resistance and the 4th electric capacity;
The anodic bonding of described the 5th diode is in an end of described power supply, and the negative electrode of described the 5th diode is connected with an end of the 4th electric capacity by the 3rd resistance, and the other end of described the 4th electric capacity is connected to the 4th pin of the described rectifier bridge of described voltage stabilizing circuit;
One end of described the 4th resistance is connected in an end of the 4th electric capacity, and the other end of described the 4th resistance is connected in an end of the 5th resistance, and the another end of described the 4th resistance is connected with described decision circuitry;
The other end of described the 5th resistance is connected to the 4th pin of the described rectifier bridge of described voltage stabilizing circuit, and the another end of described the 5th resistance is connected with described decision circuitry.
8. protection socket as claimed in claim 5, is characterized in that, described decision circuitry comprises: the 6th diode, the 7th diode, the 8th diode, triode, the 6th resistance, the 7th resistance and the 8th resistance;
The negative electrode of described the 6th diode is connected in the 4th resistance in described sample circuit, the anode of described the 6th diode is connected to the base stage of triode by the 6th resistance, the emitter of described triode is connected with the 4th pin of the described rectifier bridge of described voltage stabilizing circuit;
The negative electrode of described the 7th diode is connected in the 5th resistance in described sample circuit, and the anode of described the 7th diode is connected to the anode of described the 8th diode and the inverter of described indication commutation circuit;
The negative electrode of described the 8th diode is the collector electrode of connecting triode and an end of the 7th resistance respectively, and the other end of described the 7th resistance connects respectively the first pin of the described rectifier bridge of the anode of described the first diode of described indication commutation circuit and described voltage stabilizing circuit;
One end of described the 8th resistance and the anodic bonding of described the 8th diode, the anodic bonding of described first diode of the other end of described the 8th resistance and described indication commutation circuit.
9. a terminal, is characterized in that, comprises over-and under-voltage protective circuit as described as claim 1-4 any one and charging circuit, wherein:
Described over-and under-voltage protective circuit is connected with described charging circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320463447 CN203352136U (en) | 2013-07-31 | 2013-07-31 | Overvoltage/undervoltage protection circuit, protection socket and terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320463447 CN203352136U (en) | 2013-07-31 | 2013-07-31 | Overvoltage/undervoltage protection circuit, protection socket and terminal |
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| CN203352136U true CN203352136U (en) | 2013-12-18 |
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| CN 201320463447 Expired - Fee Related CN203352136U (en) | 2013-07-31 | 2013-07-31 | Overvoltage/undervoltage protection circuit, protection socket and terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401215A (en) * | 2013-07-31 | 2013-11-20 | 深圳市金立通信设备有限公司 | Over-voltage and under-voltage protection circuit, protection socket and terminal |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401215A (en) * | 2013-07-31 | 2013-11-20 | 深圳市金立通信设备有限公司 | Over-voltage and under-voltage protection circuit, protection socket and terminal |
| CN103401215B (en) * | 2013-07-31 | 2017-04-05 | 深圳市金立通信设备有限公司 | A kind of over-and under-voltage protection circuit, protection socket and terminal |
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Effective date of registration: 20160311 Address after: Lake Industrial Park in Guangdong province Dongguan City Dalingshan Town 523811 Patentee after: DONGGUAN JINMING ELECTRONIC CO., LTD. Address before: Futian District Shenzhen City, Guangdong province 518040 Shennan Road No. 7028 East Times Technology Building, 21 floor Patentee before: Shenzhen Jinli Communication Equipment Co., Ltd. |
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