CN203522557U - Voltage reducing circuit and electronic device - Google Patents
Voltage reducing circuit and electronic device Download PDFInfo
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- CN203522557U CN203522557U CN201320594526.8U CN201320594526U CN203522557U CN 203522557 U CN203522557 U CN 203522557U CN 201320594526 U CN201320594526 U CN 201320594526U CN 203522557 U CN203522557 U CN 203522557U
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Abstract
The utility model discloses a voltage reducing circuit and an electronic device. The voltage reducing circuit includes a first AC input terminal, a second AC input terminal, a transformer, a first rectifying and filtering module, a relay, a second rectifying and filtering module, a switch control module, a first DC output terminal and a second DC output terminal. A secondary output terminal is added at a secondary side of the transformer, an alternating current can be converted into a plurality of alternating currents to be output, an alternating current outputted from a secondary output terminal of the transformer is converted into a direct current by the second rectifying and filtering module, the switch control module controls the relay according to the direct current to gate a secondary output terminal of the transformer, thereby, the transformer can output the same alternating current to the first rectifying and filtering module to be rectified and filtered when different alternating currents are inputted, the same alternating current then is converted into the same direct current to supply power, to achieve that the voltage reducing circuit can automatically adjust voltage output for different alternating currents, and the electronic device can be ensured to work normally in places using different alternating currents.
Description
Technical field
The utility model relates to power technique fields, relates in particular to a kind of reduction voltage circuit and electronic equipment.
Background technology
In electronic equipment, required low-voltage DC in the time of conventionally need to designing reduction voltage circuit and convert civil power (as 220V or 110V) to electronic equipment internal loaded work piece.For example, in stereo set, in order to reach better audio, conventionally in stereo set, use the reduction voltage circuit that contains toroidal transformer civil power (as 220V or 110V) to be converted to the power supply (as 12V direct current) of stereo set sound intermediate frequency discharge circuit needs.Be illustrated in figure 1 the electrical block diagram of reduction voltage circuit in prior art, in Fig. 1, if access 220V civil power, 220V civil power is exported the alternating current of 24V after toroidal transformer T0 step-down, and 24V alternating current becomes the output of 24V direct current after output rectification filter module 100 is carried out rectifying and wave-filtering processing; If access 110V civil power, 110V civil power is exported the alternating current of 12V after toroidal transformer T0 step-down, and 12V alternating current becomes the output of 12V direct current after output rectification filter module 100 is carried out rectifying and wave-filtering processing.
Yet, for the reduction voltage circuit shown in Fig. 1, if stereo set is applicable to use the occasion (being that stereo set needs 24V powered by direct current) of 220V mains-supplied, when the occasion of using 110V mains-supplied is used stereo set, the audio frequency discharge circuit in stereo set will be due to supply power voltage deficiency cisco unity malfunction; On the contrary, if stereo set is applicable to use the occasion (being that stereo set needs 12V powered by direct current) of 110V mains-supplied,, when the occasion of using 220V mains-supplied is used stereo set, will there is the danger being burned in stereo set because supply power voltage is excessive.Therefore there is limitation in the reduction voltage circuit shown in Fig. 1 in application, and the electronic equipment having assembled, is only applicable to a kind of civil power of voltage, and can not be for the civil power of other kind.
Utility model content
Main purpose of the present utility model is to propose a kind of reduction voltage circuit and electronic equipment, is intended to realize the civil power input for different, and reduction voltage circuit can both be exported by automatic regulating voltage, guarantees that electronic equipment is using the occasion of different civil powers all normally to work.
In order to achieve the above object, the utility model proposes a kind of reduction voltage circuit, this reduction voltage circuit comprises transformer, the first rectification filtering module, the first alternating current input and the second alternating current input that are connected with the first primary input terminal, second primary input terminal of described transformer respectively, and respectively with the first output of described the first rectification filtering module, the first DC output end and the second DC output end that the second output is connected; Described transformer comprises at least four secondary output ends, described reduction voltage circuit also comprises relay, for the alternating current of a secondary output end output of described transformer is converted to galvanic the second rectification filtering module, and for control the switch control module of the secondary output end of transformer described in described relay gating according to the direct current size of described the second rectification filtering module output;
The first input end of described the first rectification filtering module, the second input are connected by the switch of described relay and the secondary output end of described transformer respectively; The input of described the second rectification filtering module is connected with a secondary output end of described transformer, and output is connected with the input of described switch control module, and the output of described switch control module is connected with the coil of described relay.
Preferably, described transformer comprises the first secondary output end, second subprime output, level output and the 4th secondary output end for the third time; Described second subprime output is connected with the switch of described relay respectively with the described output of level for the third time, or described the first secondary output end is connected with the switch of described relay respectively with described the 4th secondary output end.
Preferably, the switch of described relay comprises the first normally opened contact, the second normally opened contact, the first normally-closed contact, the second normally-closed contact, the first common and the second common;
Described the first normally opened contact is connected with described the first secondary output end, described the first normally-closed contact is connected with described second subprime output, described the second normally opened contact is connected with described the 4th secondary output end, described the second normally-closed contact is connected with the described output of level for the third time, described the first common is connected with the first input end of described the first rectification filtering module, and described the second common is connected with the second input of described the first rectification filtering module.
Preferably, described the first rectification filtering module comprises rectifier bridge, the first filter capacitor and the second filter capacitor;
The positive input terminal of described rectifier bridge is connected with described the first common, and the negative input end of described rectifier bridge is connected with described the second common; The positive pole of described the first filter capacitor is connected with the positive output end of described rectifier bridge, and is connected the minus earth of described the first filter capacitor with described the first DC output end; The plus earth of described the second filter capacitor, the negative pole of described the second filter capacitor is connected with the negative output terminal of described rectifier bridge, and is connected with described the second DC output end.
Preferably, described the second rectification filtering module comprises diode and the 3rd filter capacitor;
The anode of described diode is connected with described second subprime output, and the negative electrode of described diode is connected with the positive pole of described the 3rd filter capacitor, and is connected the minus earth of described the 3rd filter capacitor with the input of described switch control module.
Preferably, described switch control module comprises voltage-stabiliser tube, triode and the first resistance, and the coil of described relay comprises Enable Pin and earth terminal;
The negative electrode of described voltage-stabiliser tube is connected with the negative electrode of described diode, and the anode of described voltage-stabiliser tube is connected with the base stage of described triode, and the collector electrode of described triode is connected with described Enable Pin, the grounded emitter of described triode;
One end of described the first resistance is connected with the negative electrode of described diode, and the other end of described the first resistance is connected with described Enable Pin, described earth terminal ground connection.
Preferably, described switch control module also comprises the second resistance; One end of described the second resistance is connected with the negative electrode of described diode, and the negative electrode of voltage-stabiliser tube connects described in the other end of described the second resistance.
The utility model also proposes a kind of electronic equipment, this electronic equipment comprises reduction voltage circuit, this reduction voltage circuit comprises transformer, the first rectification filtering module, the first alternating current input and the second alternating current input that are connected with the first primary input terminal, second primary input terminal of described transformer respectively, and respectively with the first output of described the first rectification filtering module, the first DC output end and the second DC output end that the second output is connected; Described transformer comprises at least four secondary output ends, described reduction voltage circuit also comprises relay, for the alternating current of a secondary output end output of described transformer is converted to galvanic the second rectification filtering module, and for control the switch control module of the secondary output end of transformer described in described relay gating according to the direct current size of described the second rectification filtering module output;
The first input end of described the first rectification filtering module, the second input are connected by the switch of described relay and the secondary output end of described transformer respectively; The input of described the second rectification filtering module is connected with a secondary output end of described transformer, and output is connected with the input of described switch control module, and the output of described switch control module is connected with the coil of described relay.
The reduction voltage circuit the utility model proposes, by the primary side at transformer, set up secondary output end, civil power is converted to multiple low-voltage AC output, the second rectification filtering module is converted to direct current by the alternating current of a secondary output end output of transformer, and export switch control module to, switch control module is according to the direct current size of the second rectification filtering module output, the secondary output end of control relay gating transformer, while inputting with the civil power different, the secondary output end output voltage of relay automatic switchover transformer, making transformer export same alternating current to the first rectification filtering module carries out after rectifying and wave-filtering processing, converting same direct current to powers.Reduction voltage circuit of the present utility model, when different civil power inputs, transformer can both be exported same alternating current, and through the first rectification filtering module, convert same direct current to and power, thereby realize for different civil power inputs, reduction voltage circuit can both be exported by automatic regulating voltage, guarantees that the electronic equipment with this reduction voltage circuit is using the occasion of different civil powers all normally to work.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of reduction voltage circuit in prior art;
Fig. 2 is the electrical block diagram of the utility model reduction voltage circuit preferred embodiment.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate the technical solution of the utility model.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model proposes a kind of reduction voltage circuit.
With reference to Fig. 2, Fig. 2 is the electrical block diagram of the utility model reduction voltage circuit preferred embodiment.
In the utility model preferred embodiment, reduction voltage circuit comprises the first alternating current input AC_IN1, the second alternating current input AC_IN2, transformer T1, the first rectification filtering module 10, relay U1, the second rectification filtering module 20, switch control module 30, the first DC output end DC_OUT1 and the second DC output end DC_OUT2.The present embodiment can be at least four secondary output ends of transformer T1 primary side setting, according to the civil power of different occasion inputs, in the primary side of transformer T1, set up adaptively the number of secondary output end, correspondingly to export the low-voltage AC of different amplitudes, for example, the primary side of transformer T1 arranges four secondary output ends (setting up again two secondary output ends on the basis of original two secondary output ends of primary side of transformer T1), when access 220V civil power, the alternating current of exportable 24V and 12V after transformer T1 step-down; When access 110V civil power, the alternating current of exportable 12V and 6V after transformer T1 step-down.The transformer T1 of the present embodiment is preferably toroidal transformer, and the utility model reduction voltage circuit can be applicable to have the electronic equipment of toroidal transformer, as blue light video disc player.
In the present embodiment, the second rectification filtering module 20 is for the alternating current of a secondary output end output of transformer T1 is converted to direct current, and switch control module 30 is for according to the secondary output end of the direct current size control relay U1 gating transformer T1 of the second rectification filtering module 20 outputs.The first primary input terminal a1 of transformer T1 is connected with the first alternating current input AC_IN1, and the second primary input terminal a2 of transformer T1 is connected with the second alternating current input AC_IN2; The first input end of the first rectification filtering module 10, the second input are connected with the secondary output end of transformer T1 by the switch of relay U1 respectively, the first output of the first rectification filtering module 10 is connected with the first DC output end DC_OUT1, and the second output of the first rectification filtering module 10 is connected with the second DC output end DC_OUT2; The input of the second rectification filtering module 20 is connected with a secondary output end of transformer T1, and the output of the second rectification filtering module 20 is connected with the input of switch control module 30, and the output of switch control module 30 is connected with the coil of relay U1.
The present embodiment is set up secondary output end on the basis of original two secondary output ends of primary side of transformer T1 again, transformer T1 is converted to multiple low-voltage AC output by the civil power from the first alternating current input AC_IN1 and the second alternating current input AC_IN2 input, the second rectification filtering module 20 is converted to direct current by the alternating current of a secondary output end output of transformer T1, and export switch control module 30 to, switch control module 30 is according to the direct current size of the second rectification filtering module 20 outputs, the secondary output end of control relay U1 gating transformer T1, while inputting with the civil power different, the secondary output end output voltage of relay U1 automatic switchover transformer T1, make transformer T1 export same alternating current to the first rectification filtering module 10, the first rectification filtering module 10 carries out the alternating current receiving after rectifying and wave-filtering processing, convert this alternating current to direct current, thereby, by the state of switch control module 30 control relay U1 switches, the secondary output end output voltage of relay U1 automatic switchover transformer T1, when different civil power inputs, transformer T1 exports and converts same direct current to after same alternating current to the first rectification filtering module 10 and power.
With respect to prior art, reduction voltage circuit of the present utility model, when different civil power inputs, transformer T1 can both export same alternating current, and through the first rectification filtering module 10, convert same direct current to and power, thereby realize for different civil power inputs, reduction voltage circuit can both be exported by automatic regulating voltage, guarantee that the electronic equipment with this reduction voltage circuit is using the occasion of different civil powers all normally to work.
As shown in Figure 2, the present embodiment preferably arranges four secondary output ends in transformer T1 primary side, transformer T1 comprises the first secondary output end b1, second subprime output b2, level output b3 and the 4th secondary output end b4 for the third time, the turn ratio of transformer T1 primary side output winding is 1:2, between the first secondary output end b1, the 4th secondary output end b4 and second subprime output b2, the turn ratio Nb1b2:Nb2b3=1:2 of winding between level output b3 for the third time; Second subprime output b2 is connected with the switch of relay U1 respectively with a level output b3 for the third time, or the first secondary output end b1 is connected with the switch of relay U1 respectively with the 4th secondary output end b4, the present embodiment, when initial condition, arranges second subprime output b2 and is connected with the switch of relay U1 respectively with a level output b3 for the third time.
Particularly, the number that secondary output end is set with transformer T1 primary side is corresponding, the present embodiment is preferably selected the relay U1 with double-point double-throw switch, and the switch of relay U1 comprises the first normally opened contact NO1, the second normally opened contact NO2, the first normally-closed contact NC1, the second normally-closed contact NC2, the first common COM1 and the second common COM2.The present embodiment is in the idle situation of relay U1, and the first common COM1 and the first normally-closed contact NC1 connect, and the second common COM2 and the second normally-closed contact NC2 connect, and the first normally opened contact NO1, the second normally opened contact NO2 are in off-state.
The first normally opened contact NO1 is connected with the first secondary output end b1, the first normally-closed contact NC1 is connected with second subprime output b2, the second normally opened contact NO2 is connected with the 4th secondary output end b4, the second normally-closed contact NC2 is connected with a level output b3 for the third time, the first common COM1 is connected with the first input end of the first rectification filtering module 10, and the second common COM2 is connected with the second input of the first rectification filtering module 10.
Particularly, the first rectification filtering module 10 comprises rectifier bridge BD1, the first filter capacitor CE1 and the second filter capacitor CE2.The positive input terminal AC+ of rectifier bridge BD1 is connected with the first common COM1, and the negative input end AC-of rectifier bridge BD1 is connected with the second common COM2; The positive pole of the first filter capacitor CE1 is connected with the positive output end DC+ of rectifier bridge BD1, and is connected the minus earth of the first filter capacitor CE1 with the first DC output end DC_OUT1; The plus earth of the second filter capacitor CE2, the negative pole of the second filter capacitor CE2 is connected with the negative output terminal DC-of rectifier bridge BD1, and is connected with the second DC output end DC_OUT2.
Particularly, the second rectification filtering module 20 comprises diode D1 and the 3rd filter capacitor CE3.The anode of diode D1 is connected with second subprime output b2, and the negative electrode of diode D1 is connected with the positive pole of the 3rd filter capacitor CE3, and is connected the minus earth of the 3rd filter capacitor CE3 with the input of switch control module 30.
Particularly, switch control module 30 comprises voltage-stabiliser tube ZD1, triode Q1 and the first resistance R 1, and the coil of relay U1 comprises Enable Pin A and earth terminal B, and in the present embodiment, triode Q1 is NPN triode; When the present embodiment is inputted according to different civil powers, the direct current size of the second rectification filtering module 20 outputs, selects suitable voltage-stabiliser tube ZD1 adaptively, and to control triode Q1 conducting or cut-off, it is the voltage-stabiliser tube ZD1 of 5V that the present embodiment is preferably selected voltage stabilizing value.
The negative electrode of voltage-stabiliser tube ZD1 is connected with the negative electrode of diode D1, and the anode of voltage-stabiliser tube ZD1 is connected with the base stage of triode Q1, and the collector electrode of triode Q1 is connected with Enable Pin A, the grounded emitter of triode Q1; One end of the first resistance R 1 is connected with the negative electrode of diode D1, and the other end of the first resistance R 1 is connected with Enable Pin A, earth terminal B ground connection.
Switch control module 30 also comprises the second resistance R 2; One end of the second resistance R 2 is connected with the negative electrode of diode D1, and the negative electrode of the other end voltage-stabiliser tube ZD1 of the second resistance R 2 connects.
The operation principle of the utility model reduction voltage circuit specifically describes as follows:
As shown in Figure 2, take the line voltage of the first alternating current input AC_IN1 and the second alternating current input AC_IN2 access describes as 110V or 220V as example.If while being 110V from the civil power of the first alternating current input AC_IN1 and the second alternating current input AC_IN2 input, the voltage of the first secondary output end b1 of transformer T1 and the 4th secondary output end b4 output is 12V alternating current, and the voltage of the second subprime output b2 of transformer T1 and level output b3 output is for the third time 6V alternating current; If while being 220V from the civil power of the first alternating current input AC_IN1 and the second alternating current input AC_IN2 input, the voltage of the first secondary output end b1 of transformer T1 and the 4th secondary output end b4 output is 24V alternating current, and the voltage of the second subprime output b2 of transformer T1 and level output b3 output is for the third time 12V alternating current.
In the situation that 110V civil power is inputted, the 6V alternating current of the second subprime output b2 output of transformer T1 carries out rectification through diode D1, owing to only having diode D1 herein, therefore diode D1 carries out halfwave rectifier to the 6V alternating current of the second subprime output b2 output of transformer T1, thereby diode D1 is converted to 3V direct current by 6V alternating current, after the ripple in the 3rd this 3V direct current of filter capacitor CE3 filtering, export.Because the voltage stabilizing value of voltage-stabiliser tube ZD1 is 5V, now voltage-stabiliser tube ZD1 cut-off, triode Q1 also ends, thereby diode D1, the 3V direct current of exporting after the 3rd filter capacitor CE3 rectifying and wave-filtering exports the Enable Pin A of the coil of relay U1 to via the first resistance R 1, Enable Pin A is high level, the coil electricity of relay U1 now, relay U1 work, the first common COM1 of the switch of relay U1 and the first normally opened contact NO1 connect, the second common COM2 and the second normally opened contact NO2 connect, the 12V alternating current (+12V alternating current) of the first secondary output end b1 output of transformer T1 exports the positive input terminal AC+ of rectifier bridge BD1 to, the 12V alternating current (12V alternating current) of the 4th secondary output end b4 output of transformer T1 exports the negative input end AC-of rectifier bridge BD1 to, after rectifier bridge BD1 carries out full-wave rectification, positive output end DC+ output 12V direct current (+12V direct current) from rectifier bridge BD1, negative output terminal DC-output 12V direct current (12V direct current) from rectifier bridge BD1, thereby the direct current of exporting positive and negative 12V from the first DC output end DC_OUT1 and the second DC output end DC_OUT2 is respectively powered.
In the situation that 220V civil power is inputted, the 12V alternating current of the second subprime output b2 of transformer T1 output, after diode D1 carries out rectification, is converted to 6V direct current, and exports after the ripple in the 3rd this 6V direct current of filter capacitor CE3 filtering.Now voltage-stabiliser tube ZD1 conducting, the base stage of triode Q1 is high level, also conducting of triode Q1, after triode Q1 conducting, the Enable Pin A of the coil of relay U1 is dragged down, Enable Pin A is low level, now the coil of relay U1 is still in off-position, relay U1 keeps off position, the the first common COM1 and the first normally-closed contact NC1 that are the switch of relay U1 still connect, the second common COM2 and the second normally-closed contact NC2 still connect, the 12V alternating current (+12V alternating current) of the second subprime output b2 output of transformer T1 exports the positive input terminal AC+ of rectifier bridge BD1 to, the 12V alternating current (12V alternating current) of the output of the level for the third time b3 output of transformer T1 exports the negative input end AC-of rectifier bridge BD1 to, after rectifier bridge BD1 carries out full-wave rectification, positive output end DC+ output 12V direct current (+12V direct current) from rectifier bridge BD1, negative output terminal DC-output 12V direct current (12V direct current) from rectifier bridge BD1, thereby the direct current of exporting positive and negative 12V from the first DC output end DC_OUT1 and the second DC output end DC_OUT2 is respectively powered.
Hence one can see that, no matter be the input of 110V civil power or the input of 220V civil power, all the automatically switch secondary output end output voltage of transformer T1 of relay U1 (is the first secondary output end b1 of relay U1 gating transformer T1, the 4th secondary output end b4 output 12V alternating current to the first rectification filtering module 10, or the second subprime output b2 of gating transformer T1, the 12V of level output b3 output for the third time alternating current to the first rectification filtering module 10), transformer T1 exports 12V alternating current to the first rectification filtering module 10, carry out after rectifying and wave-filtering processing, from the direct current of the first DC output end DC_OUT1 and the second DC output end DC_OUT2 output, be all 12V, therefore no matter be to use 110V civil power or the occasion of 220V civil power, the electronic equipment with the utility model reduction voltage circuit can both normally be worked, solved the in the situation that of different civil power input, electronic equipment is cisco unity malfunction due to supply power voltage deficiency, or because supply power voltage is excessive, there is the dangerous problem being burned, guarantee that electronic equipment is using the occasion of different civil powers normally to work.
The utility model also proposes a kind of electronic equipment, and this electronic equipment comprises reduction voltage circuit, and the structure of this reduction voltage circuit, operation principle and the beneficial effect that brings, all with reference to above-described embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a reduction voltage circuit, comprise transformer, the first rectification filtering module, the first alternating current input and the second alternating current input that are connected with the first primary input terminal, second primary input terminal of described transformer respectively, and respectively with the first output of described the first rectification filtering module, the first DC output end and the second DC output end that the second output is connected; It is characterized in that,
Described transformer comprises at least four secondary output ends, described reduction voltage circuit also comprises relay, for the alternating current of a secondary output end output of described transformer is converted to galvanic the second rectification filtering module, and for control the switch control module of the secondary output end of transformer described in described relay gating according to the direct current size of described the second rectification filtering module output;
The first input end of described the first rectification filtering module, the second input are connected by the switch of described relay and the secondary output end of described transformer respectively; The input of described the second rectification filtering module is connected with a secondary output end of described transformer, and output is connected with the input of described switch control module, and the output of described switch control module is connected with the coil of described relay.
2. reduction voltage circuit as claimed in claim 1, is characterized in that, described transformer comprises the first secondary output end, second subprime output, level output and the 4th secondary output end for the third time; Described second subprime output is connected with the switch of described relay respectively with the described output of level for the third time, or described the first secondary output end is connected with the switch of described relay respectively with described the 4th secondary output end.
3. reduction voltage circuit as claimed in claim 2, is characterized in that, the switch of described relay comprises the first normally opened contact, the second normally opened contact, the first normally-closed contact, the second normally-closed contact, the first common and the second common;
Described the first normally opened contact is connected with described the first secondary output end, described the first normally-closed contact is connected with described second subprime output, described the second normally opened contact is connected with described the 4th secondary output end, described the second normally-closed contact is connected with the described output of level for the third time, described the first common is connected with the first input end of described the first rectification filtering module, and described the second common is connected with the second input of described the first rectification filtering module.
4. reduction voltage circuit as claimed in claim 3, is characterized in that, described the first rectification filtering module comprises rectifier bridge, the first filter capacitor and the second filter capacitor;
The positive input terminal of described rectifier bridge is connected with described the first common, and the negative input end of described rectifier bridge is connected with described the second common; The positive pole of described the first filter capacitor is connected with the positive output end of described rectifier bridge, and is connected the minus earth of described the first filter capacitor with described the first DC output end; The plus earth of described the second filter capacitor, the negative pole of described the second filter capacitor is connected with the negative output terminal of described rectifier bridge, and is connected with described the second DC output end.
5. the reduction voltage circuit as described in any one in claim 2 to 4, is characterized in that, described the second rectification filtering module comprises diode and the 3rd filter capacitor;
The anode of described diode is connected with described second subprime output, and the negative electrode of described diode is connected with the positive pole of described the 3rd filter capacitor, and is connected the minus earth of described the 3rd filter capacitor with the input of described switch control module.
6. reduction voltage circuit as claimed in claim 5, is characterized in that, described switch control module comprises voltage-stabiliser tube, triode and the first resistance, and the coil of described relay comprises Enable Pin and earth terminal;
The negative electrode of described voltage-stabiliser tube is connected with the negative electrode of described diode, and the anode of described voltage-stabiliser tube is connected with the base stage of described triode, and the collector electrode of described triode is connected with described Enable Pin, the grounded emitter of described triode;
One end of described the first resistance is connected with the negative electrode of described diode, and the other end of described the first resistance is connected with described Enable Pin, described earth terminal ground connection.
7. reduction voltage circuit as claimed in claim 6, is characterized in that, described switch control module also comprises the second resistance; One end of described the second resistance is connected with the negative electrode of described diode, and the negative electrode of voltage-stabiliser tube connects described in the other end of described the second resistance.
8. an electronic equipment, is characterized in that, comprises the reduction voltage circuit described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320594526.8U CN203522557U (en) | 2013-09-25 | 2013-09-25 | Voltage reducing circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320594526.8U CN203522557U (en) | 2013-09-25 | 2013-09-25 | Voltage reducing circuit and electronic device |
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| Publication Number | Publication Date |
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| CN203522557U true CN203522557U (en) | 2014-04-02 |
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| CN201320594526.8U Expired - Fee Related CN203522557U (en) | 2013-09-25 | 2013-09-25 | Voltage reducing circuit and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115534708A (en) * | 2022-10-21 | 2022-12-30 | 深圳市量子新能科技有限公司 | Control circuit of ground AC charging pile and AC charging pile |
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2013
- 2013-09-25 CN CN201320594526.8U patent/CN203522557U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115534708A (en) * | 2022-10-21 | 2022-12-30 | 深圳市量子新能科技有限公司 | Control circuit of ground AC charging pile and AC charging pile |
| CN115534708B (en) * | 2022-10-21 | 2023-06-23 | 深圳市量子新能科技有限公司 | Control circuit of ground alternating-current charging pile and alternating-current charging pile |
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