CN102843030B - Topological circuit and electronic equipment - Google Patents
Topological circuit and electronic equipment Download PDFInfo
- Publication number
- CN102843030B CN102843030B CN201210358175.0A CN201210358175A CN102843030B CN 102843030 B CN102843030 B CN 102843030B CN 201210358175 A CN201210358175 A CN 201210358175A CN 102843030 B CN102843030 B CN 102843030B
- Authority
- CN
- China
- Prior art keywords
- electrical switch
- power supply
- electric capacity
- electronic circuit
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses a kind of topological circuit and have the electronic equipment of this topological circuit, topological circuit includes power supply input electronic circuit, just boosts electronic circuit and negative boosting electronic circuit；Wherein power supply input electronic circuit includes Unidirectional direct-current power supply, inductance and the first electrical switch, and inductance includes the first end and the second end, and its first end is connected with the positive pole of Unidirectional direct-current power supply, and the second end is connected with the negative pole of Unidirectional direct-current power supply by the first electrical switch；The electronic circuit that just boosting includes the second electrical switch that the second end with inductance is connected；Negative boosting electronic circuit includes the 3rd electrical switch, the 4th electrical switch and for storing the first electric capacity of electric energy, one end of this first electric capacity is connected with the second end of inductance, the other end is connected with the negative pole of Unidirectional direct-current power supply by the 3rd electrical switch, and is connected with the 4th electrical switch；The duty of the first electrical switch and the 4th electrical switch is consistent, and contrary with the duty of the second electrical switch and the 3rd electrical switch。<!--1-->
Description
Technical field
The present invention relates to electronic technology field, particularly to a kind of topological circuit and electronic equipment。
Background technology
It is known that electronic equipment needs multiple supply voltage, the voltage such as flat panel TV interior power supply circuit includes 24V, 12V, 5V, 3.3V, 2.2V and 8V etc.。Being usually provided with operational amplifier in flat panel TV, this operational amplifier needs to provide Symmetrical power supply。In prior art, positive and negative voltage sources generally adopts two changers to obtain, and one of them changer is by the voltage increase of input, and the voltage reversal of input is promoted by another changer, and these two changers are switchmode converter。In addition for ensureing that generating positive and negative voltage is symmetrical, generating positive and negative voltage need to be set and follow the tracks of circuit, also need to arrange to protect circuit accordingly simultaneously。Therefore its circuit structure is complex, causes that the production cost of electronic equipment is higher。
Summary of the invention
Present invention is primarily targeted at a kind of topological circuit of offer, it is intended to reduce the production cost of electronic equipment。
To achieve these goals, the present invention provides a kind of topological circuit, and this topological circuit includes power supply input electronic circuit, just boosts electronic circuit and negative boosting electronic circuit；Wherein power supply input electronic circuit includes Unidirectional direct-current power supply, inductance and the first electrical switch, and inductance includes the first end and the second end, and its first end is connected with the positive pole of Unidirectional direct-current power supply, and the second end is connected with the negative pole of Unidirectional direct-current power supply by the first electrical switch；The electronic circuit that just boosting includes the second electrical switch that the second end with described inductance is connected；Negative boosting electronic circuit includes the 3rd electrical switch, the 4th electrical switch and for storing the first electric capacity of electric energy, first end of this first electric capacity is connected with the second end of described inductance, second end is connected with the negative pole of Unidirectional direct-current power supply by the 3rd electrical switch, and is connected with described 4th electrical switch；The duty of described first electrical switch and the 4th electrical switch is consistent, and contrary with the duty of the second electrical switch and the 3rd electrical switch。
Preferably, the described electronic circuit that just boosting also includes the second electric capacity, and one end of described second electrical switch is connected with the second end of inductance, and the positive pole of the other end and the second electric capacity connects, and the negative pole of this second electric capacity is connected with the negative pole of described Unidirectional direct-current power supply。
Preferably, described negative boosting electronic circuit also includes the 3rd electric capacity, and one end of described 4th electrical switch is connected with the first electric capacity, and the negative pole of the other end and the 3rd electric capacity connects, and the positive pole of the 3rd electric capacity is connected with the negative pole of described Unidirectional direct-current power supply。
Preferably, described topological circuit also includes control chip, and this control chip is connected with described first electrical switch, modulates signal with output pulse width and controls the duty of the first electrical switch。
Preferably, described second electrical switch is diode, and the anode of this diode is connected with the second end of described inductance, and negative electrode is the positive output end of electronic circuit of just boosting；
3rd electrical switch is the first audion, this first audion is NPN audion, base stage is connected with the second end of described inductance by the first resistance, emitter stage is connected with the negative pole of described Unidirectional direct-current power supply, colelctor electrode is connected with the second end of described first electric capacity, and the first end of this first electric capacity is connected with the second end of described inductance；
4th electrical switch is the second audion, and this second audion is NPN audion, and base stage is connected with the negative pole of described Unidirectional direct-current power supply by the second resistance, and the colelctor electrode of emitter stage and the first audion connects, the negative output terminal of the extremely negative boosting electronic circuit of current collection。
This invention also provides for a kind of electronic equipment, and this electronic equipment includes topological circuit, and this topological circuit includes power supply input electronic circuit, just boosts electronic circuit and negative boosting electronic circuit；Wherein power supply input electronic circuit includes Unidirectional direct-current power supply, inductance and the first electrical switch, and inductance includes the first end and the second end, and its first end is connected with the positive pole of Unidirectional direct-current power supply, and the second end is connected with the negative pole of Unidirectional direct-current power supply by the first electrical switch；The electronic circuit that just boosting includes the second electrical switch that the second end with described inductance is connected；Negative boosting electronic circuit includes the 3rd electrical switch, the 4th electrical switch and for storing the first electric capacity of electric energy, one end of this first electric capacity is connected with the second end of described inductance, the other end is connected with the negative pole of Unidirectional direct-current power supply by the 3rd electrical switch, and is connected with described 4th electrical switch；The duty of described first electrical switch and the 4th electrical switch is consistent, and contrary with the duty of the second electrical switch and the 3rd electrical switch。
The present invention disconnects by controlling the first electrical switch and the 4th electrical switch, and the second electrical switch and the 3rd electrical switch close, so that the voltage superposition of the induced voltage of inductance generation and Unidirectional direct-current power supply provides positive voltage for load, and the first electric capacity are charged；When the first electrical switch and the 4th electrical switch close, the second electrical switch and the 3rd electrical switch disconnect, so that inductance stores energy, and provide negative voltage by the first capacitor releases electric energy for load。Therefore topological circuit components and parts provided by the invention are less, and circuit structure is simple, can effectively reduce the cost of circuit, and then reduce the production cost of electronic equipment。In addition when exporting positive voltage short circuit, then the first electric capacity cannot be charged so that the negative voltage of negative boosting electronic circuit output is zero, therefore can effectively follow the tracks of and protect load, thus extending the service life of load。
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of topological circuit first embodiment of the present invention；
Fig. 2 is the electrical block diagram of topological circuit the second embodiment of the present invention。
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing。
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention。
With reference to the electrical block diagram that Fig. 1, Fig. 1 are topological circuit first embodiment of the present invention。The topological circuit that the present embodiment provides includes power supply input electronic circuit 10, just boosts electronic circuit 20 and negative boosting electronic circuit 30；Wherein power supply input electronic circuit 10 includes Unidirectional direct-current power supply Vi, inductance L and the first electrical switch K1, inductance L includes the first end and the second end, its first end is connected with the positive pole of Unidirectional direct-current power supply Vi, and the second end is connected by the negative pole of the first electrical switch K1 and Unidirectional direct-current power supply Vi；The electronic circuit 20 that just boosting includes the second electrical switch K2 that the second end with inductance L is connected；Negative boosting electronic circuit 30 includes the 3rd electrical switch K3, the 4th electrical switch K4 and for storing the first electric capacity C1 of electric energy, first end of this first electric capacity C1 is connected with second end of inductance L, second end is connected by the negative pole of the 3rd electrical switch K3 and Unidirectional direct-current power supply Vi, and is connected with the 4th electrical switch K4；The duty of the first electrical switch K1 and the four electrical switch K4 is consistent, and contrary with the duty of the second electrical switch K2 and the 3rd electrical switch K3。
In the present embodiment, the duty of above-mentioned first electrical switch K1 and the four electrical switch K4 is consistent and synchronizes, and the duty of the second electrical switch K2 and the three electrical switch K3 is consistent and synchronizes。When the first electrical switch K1 and the four electrical switch K4 is in closure state, the second electrical switch K2 and the three electrical switch K3 is off；When the first electrical switch K1 and the four electrical switch K4 is off, the second electrical switch K2 and the three electrical switch K3 is in closure state。
Specifically, a control chip can be set and the first electrical switch K1 connects, modulate signal with output pulse width and control the duty of the first electrical switch K1。Such as when control chip exports high level, the first electrical switch K1 Guan Bi, during output low level, the first electrical switch K1 disconnects。
During work, first by control chip output pulse width modulation signal to the first electrical switch K1, to control the duty of the first electrical switch K1, when the first electrical switch K1 is in closure state, negative boosting electronic circuit 30 exports negative voltage, and the electronic circuit 20 that just boosting when the first electrical switch K1 is off exports positive voltage。Specifically, below the production process of positive voltage and negative voltage is made detailed description:
When the first electrical switch K1 is in closure state, Unidirectional direct-current power supply Vi will be loaded into inductance L two ends, flow through the electric current linear rise of inductance L, and inductance L stores electric energy；When the first electrical switch K1 is off, the 4th electrical switch K4 disconnects, the second electrical switch K2 and the three electrical switch K3 Guan Bi。Now, positive voltage is exported by the second electrical switch K2 after the induced voltage of inductance L generation and the voltage superposition of Unidirectional direct-current power supply Vi。
When the first electrical switch K1 is off, owing to the second electrical switch K2 closes, it is therefore the first electric capacity C1 charging after the induced voltage of inductance L generation and the voltage superposition of Unidirectional direct-current power supply Vi。When the first electrical switch K1 Guan Bi, the second electrical switch K2 and the three electrical switch K3 disconnects, the 4th electrical switch K4 Guan Bi, and now the first electric capacity C1 charging back discharge, exports negative voltage thereby through the 4th electrical switch K4。
The present invention disconnects by controlling the first electrical switch K1 and the four electrical switch K4, second electrical switch K2 and the three electrical switch K3 Guan Bi, so that the voltage superposition of the induced voltage of inductance L generation and Unidirectional direct-current power supply Vi provides positive voltage for load, and the first electric capacity C1 is charged；When the first electrical switch K1 and the four electrical switch K4 closes, the second electrical switch K2 and the three electrical switch K3 disconnects, so that inductance L stores energy, and provides negative voltage by the first electric capacity C1 release electric energy for load。Therefore topological circuit components and parts provided by the invention are less, and circuit structure is simple, can effectively reduce the cost of circuit, and then reduce the production cost of electronic equipment。In addition when exporting positive voltage short circuit, then the first electric capacity C1 cannot be charged so that the negative voltage of negative boosting electronic circuit 30 output is zero, therefore can effectively follow the tracks of and protect load, thus extending the service life of load。
Further, the above-mentioned electronic circuit 20 that just boosting also includes the second electric capacity C2, and one end of this second electrical switch K2 is connected with second end of inductance L, and the positive pole of the other end and the second electric capacity C2 connects, and the negative pole of this second electric capacity C2 is connected with the negative pole of Unidirectional direct-current power supply Vi。Above-mentioned negative boosting electronic circuit 30 also includes the 3rd electric capacity C3, and one end of the 4th electrical switch K4 is connected with the first electric capacity C1, and the negative pole of the other end and the 3rd electric capacity C3 connects, and the positive pole of the 3rd electric capacity C3 is connected with the negative pole of Unidirectional direct-current power supply Vi。
In the present embodiment, by arranging the second electric capacity C2 and the three electric capacity C3, the smoothness of just boosting electronic circuit 20 and negative boosting electronic circuit 30 output voltage can be effectively improved, be therefore more suitable for people and use。
With reference to the electrical block diagram that Fig. 2, Fig. 2 are topological circuit the second embodiment of the present invention。Based on above-described embodiment, in the present embodiment, above-mentioned second electrical switch K2 is diode D1, and the anode of this diode D1 is connected with second end of inductance L, and negative electrode is the positive output end of electronic circuit 20 of just boosting；3rd electrical switch K3 is the first audion Q1, this first audion Q1 is NPN audion, base stage is connected by second end of the first resistance R1 and inductance L, emitter stage is connected with the negative pole of Unidirectional direct-current power supply Vi, second end of colelctor electrode and the first electric capacity C1 connects, and first end of this first electric capacity C1 is connected with second end of inductance L；4th electrical switch K4 is the second audion Q2, this second audion Q2 is NPN audion, base stage is connected by the negative pole of the second resistance R2 and Unidirectional direct-current power supply Vi, and the colelctor electrode of emitter stage and the first audion Q1 connects, the negative output terminal of the extremely negative boosting electronic circuit 30 of current collection。
In the present embodiment, when above-mentioned first electrical switch K1 Guan Bi, inductance L is charged by Unidirectional direct-current power supply Vi, first electric capacity C1 electric discharge, so that diode D1 cut-off, first audion Q1 cut-off, the second audion Q2 conducting, the colelctor electrode output negative voltage thereby through the second audion Q2 is load supplying。When above-mentioned first electrical switch K1 disconnects, one end of the anode to diode D1 and the first electric capacity C1 is exported after the induced voltage of inductance L generation and the voltage superposition of Unidirectional direct-current power supply Vi, diode D1 is turned on, positive voltage is provided for load, make the first audion Q1 conducting simultaneously, second audion Q2 cut-off, is charged the first electric capacity C1。
It should be noted that, the voltage on the first electric capacity C1 is equal to the positive voltage of electronic circuit 20 output of just boosting herein, when the first electric capacity C1 electric discharge, owing to the second audion Q2 turns on, the current collection extremely load thereby through the second audion Q2 provides negative voltage。It is understood that in the present embodiment, can according to the pulse-width signal dutycycle of control chip output, it is thus achieved that the positive voltage of the step-up ratio of different multiples and negative voltage。Therefore, topological circuit provided by the invention, Unidirectional direct-current voltage can be converted to the high voltage of Symmetrical。
The present invention is a kind of electronic equipment also, and this electronic equipment includes topological circuit, and the circuit structure of this topological circuit and principle can refer to aforementioned, do not repeat them here。Owing to have employed afore-mentioned topology circuit, therefore simplify circuit structure, reduce the production cost of electronic equipment, be more suitable for commercial production。
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention。
Claims (5)
1. a topological circuit, it is characterised in that include power supply input electronic circuit, just boost electronic circuit and negative boosting electronic circuit；Wherein power supply input electronic circuit includes Unidirectional direct-current power supply, inductance and the first electrical switch, and inductance includes the first end and the second end, and its first end is connected with the positive pole of Unidirectional direct-current power supply, and the second end is connected with the negative pole of Unidirectional direct-current power supply by the first electrical switch；The electronic circuit that just boosting includes the second electrical switch that the second end with described inductance is connected；Negative boosting electronic circuit includes the 3rd electrical switch, the 4th electrical switch and for storing the first electric capacity of electric energy, first end of this first electric capacity is connected with the second end of described inductance, second end is connected with the negative pole of Unidirectional direct-current power supply by the 3rd electrical switch, and is connected with described 4th electrical switch；The duty of described first electrical switch and the 4th electrical switch is consistent, and contrary with the duty of the second electrical switch and the 3rd electrical switch；
Described second electrical switch is diode, and the anode of this diode is connected with the second end of described inductance, and negative electrode is the positive output end of electronic circuit of just boosting；
3rd electrical switch is the first audion, this first audion is NPN audion, base stage is connected with the second end of described inductance by the first resistance, emitter stage is connected with the negative pole of described Unidirectional direct-current power supply, colelctor electrode is connected with the second end of described first electric capacity, and the first end of this first electric capacity is connected with the second end of described inductance；
4th electrical switch is the second audion, and this second audion is NPN audion, and base stage is connected with the negative pole of described Unidirectional direct-current power supply by the second resistance, and the colelctor electrode of emitter stage and the first audion connects, the negative output terminal of the extremely negative boosting electronic circuit of current collection。
2. topological circuit as claimed in claim 1, it is characterized in that, the described electronic circuit that just boosting also includes the second electric capacity, one end of described second electrical switch is connected with the second end of inductance, the positive pole of the other end and the second electric capacity connects, and the negative pole of this second electric capacity is connected with the negative pole of described Unidirectional direct-current power supply。
3. topological circuit as claimed in claim 1, it is characterized in that, described negative boosting electronic circuit also includes the 3rd electric capacity, and one end of described 4th electrical switch is connected with the first electric capacity, the negative pole of the other end and the 3rd electric capacity connects, and the positive pole of the 3rd electric capacity is connected with the negative pole of described Unidirectional direct-current power supply。
4. topological circuit as claimed in claim 1, it is characterised in that also including control chip, this control chip is connected with described first electrical switch, modulates signal with output pulse width and controls the duty of the first electrical switch。
5. an electronic equipment, it is characterised in that include topological circuit as according to any one of Claims 1-4。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358175.0A CN102843030B (en) | 2012-09-24 | 2012-09-24 | Topological circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358175.0A CN102843030B (en) | 2012-09-24 | 2012-09-24 | Topological circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102843030A CN102843030A (en) | 2012-12-26 |
| CN102843030B true CN102843030B (en) | 2016-06-22 |
Family
ID=47370150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210358175.0A Expired - Fee Related CN102843030B (en) | 2012-09-24 | 2012-09-24 | Topological circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843030B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9178422B2 (en) * | 2013-02-21 | 2015-11-03 | Texas Instruments Incorporated | Resonance-based single inductor output-driven DC-DC converter and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201220658A (en) * | 2010-11-05 | 2012-05-16 | Univ Nat Taipei Technology | for boosting the voltages at the positive and negative output terminals |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05219738A (en) * | 1992-02-07 | 1993-08-27 | Matsushita Electric Ind Co Ltd | Multi-output switching regulator |
| JP4094487B2 (en) * | 2003-05-21 | 2008-06-04 | ローム株式会社 | Power supply for positive / negative output voltage |
-
2012
- 2012-09-24 CN CN201210358175.0A patent/CN102843030B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201220658A (en) * | 2010-11-05 | 2012-05-16 | Univ Nat Taipei Technology | for boosting the voltages at the positive and negative output terminals |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102843030A (en) | 2012-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203895095U (en) | Backlight power supply circuit of display screen | |
| CN105939107B (en) | A kind of quasi- boost switching DC-DC converter of mixed type | |
| CN104185333A (en) | Constant-current constant-voltage circuit and illuminating device | |
| CN103094975B (en) | A kind of battery charging circuit and LED lamp | |
| CN205847090U (en) | A kind of mixed type quasi-boost switching DC DC changer | |
| CN205847091U (en) | A kind of switched inductors type quasi-boost switching DC DC changer | |
| CN102843030B (en) | Topological circuit and electronic equipment | |
| CN103001498B (en) | Backlight-driven direct-current booster topology circuit | |
| CN203722473U (en) | Embedded single-switch Buck-Boost converter | |
| CN201422074Y (en) | Switch power supply | |
| CN203225658U (en) | Self-conduction boost switch power supply | |
| CN202737505U (en) | Boost charging circuit of storage battery | |
| CN102612195B (en) | LED (light emitting diode) constant current driving circuit and LED lamp using same | |
| CN212305143U (en) | Distributed cascade high-voltage power supply | |
| CN103762841B (en) | A kind of embedded single switch Buck-Boost converter | |
| TW201509093A (en) | DC-DC power converter with high step-down ratio | |
| CN102891624B (en) | Pulse power stable output device | |
| CN203788137U (en) | Overshoot protection circuit of output terminals of flyback power supply and flyback power supply | |
| CN208675108U (en) | It is a kind of to be depressured the direct-current switch power supply conversion circuit that boosted | |
| CN206992680U (en) | A kind of under-voltage protecting circuit | |
| CN206004528U (en) | A kind of high power booster circuit | |
| CN205847087U (en) | A kind of high-gain quasi-boost switching DC DC changer | |
| CN204721024U (en) | A kind of DC-DC converter and comprise its portable power source | |
| CN103633833A (en) | Single-switching-tube converter Boost-Buck-Boost converter | |
| CN202759380U (en) | Power supply circuit, LED backlight driving power supply and television set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20210924 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |