CN204669227U - A kind of LED display voltage stabilizing rectification circuit - Google Patents
A kind of LED display voltage stabilizing rectification circuit Download PDFInfo
- Publication number
- CN204669227U CN204669227U CN201520160962.3U CN201520160962U CN204669227U CN 204669227 U CN204669227 U CN 204669227U CN 201520160962 U CN201520160962 U CN 201520160962U CN 204669227 U CN204669227 U CN 204669227U
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- voltage stabilizing
- triode
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- inductance
- electric capacity
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Abstract
The utility model discloses a kind of LED display voltage stabilizing rectification circuit, comprise VIN port, inductance T1, triode Q1, voltage stabilizing didoe D3 and VOUT port; Wherein, one end of VIN positive port contact resistance R1 and the collector electrode of triode Q1, the other end of resistance R1 is the base stage of connecting triode Q1, the negative pole of voltage stabilizing didoe D3 and one end of electric capacity C1 simultaneously, and the other end of electric capacity C1 connects the terminals 2 of the positive pole of voltage stabilizing didoe D3, VIN negative terminal mouth and inductance T1 simultaneously, and the emitter of triode Q1 connects the terminals 1 of inductance T1; Described electric capacity C1 is tantalum electric capacity, and triode Q1 is NPN type; The terminals 3 of described inductance T1 connect the positive pole of diode D1, and the negative pole of diode D1 connects the positive port of VOUT; The utility model plays filtering, eliminates the effect of the coupling by power supply, and voltage is become more steady, result of use is good, and obtains direct voltage through rectification circuit, and the alternating current of input is carried out to the rectification of high-quality, rectification effect is good, use safety.
Description
Technical field
The utility model relates to LED display circuit, specifically a kind of LED display voltage stabilizing rectification circuit.
Background technology
Can be used for driving corresponding load just electric main all needs to become suitable direct current through the multistep treatment such as over commutation, filtering in use, in order to obtain more stable VD, before direct current exports, carry out voltage stabilizing to it is necessary.Market has the voltage stabilizing IC of integrated circuit of specialty, can protect output short-circuit, but price is higher and will change different voltage stabilizing IC as exported different magnitudes of voltage.Adopt triode to build voltage stabilizing circuit advantage of lower cost, but during as occurred output short-circuit, triode and outlet line can be burnt, there is security risk.
Utility model content
It is effective that the purpose of this utility model is to provide a kind of filter rectification, voltage stabilization, and the LED display voltage stabilizing rectification circuit of use safety, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of LED display voltage stabilizing rectification circuit, comprises VIN port, inductance T1, triode Q1, voltage stabilizing didoe D3 and VOUT port; Wherein, one end of VIN positive port contact resistance R1 and the collector electrode of triode Q1, the other end of resistance R1 is the base stage of connecting triode Q1, the negative pole of voltage stabilizing didoe D3 and one end of electric capacity C1 simultaneously, and the other end of electric capacity C1 connects the terminals 2 of the positive pole of voltage stabilizing didoe D3, VIN negative terminal mouth and inductance T1 simultaneously, and the emitter of triode Q1 connects the terminals 1 of inductance T1; Described electric capacity C1 is tantalum electric capacity, and triode Q1 is NPN type; The terminals 3 of described inductance T1 connect the positive pole of diode D1, and the negative pole of diode D1 connects the positive port of VOUT; The terminals 4 of described inductance T1 connect positive pole and the VOUT negative terminal mouth of diode D2 simultaneously, and the negative pole of diode D2 connects the positive port of VOUT.
Further, described triode Q1, voltage stabilizing didoe D3, resistance R1 and electric capacity C1 form voltage stabilizing circuit.
Further, the voltage between the terminals 1 of described inductance T1 and terminals 2 is Ui, and the voltage between terminals 3 and terminals 4 is U1, and the voltage between the positive port of VOUT and VOUT negative terminal mouth is U0.
Compared with prior art, the utility model plays filtering, eliminates the effect of the coupling by power supply, and voltage is become more steady, result of use is good, and obtains direct voltage through rectification circuit, the alternating current of input is carried out to the rectification of high-quality, rectification effect is good, use safety.
Accompanying drawing explanation
Fig. 1 is the structural representation of LED display voltage stabilizing rectification circuit in the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of LED display voltage stabilizing rectification circuit, comprises VIN port, inductance T1, triode Q1, voltage stabilizing didoe D3 and VOUT port; Wherein, one end of VIN positive port contact resistance R1 and the collector electrode of triode Q1, the other end of resistance R1 is the base stage of connecting triode Q1, the negative pole of voltage stabilizing didoe D3 and one end of electric capacity C1 simultaneously, and the other end of electric capacity C1 connects the terminals 2 of the positive pole of voltage stabilizing didoe D3, VIN negative terminal mouth and inductance T1 simultaneously, and the emitter of triode Q1 connects the terminals 1 of inductance T1; Described electric capacity C1 is tantalum electric capacity, and triode Q1 is NPN type; Described triode Q1, voltage stabilizing didoe D3, resistance R1 and electric capacity C1 form voltage stabilizing circuit, and electric capacity C1 plays filtering, eliminates the effect of the coupling by power supply, and voltage is become more steady; The terminals 3 of described inductance T1 connect the positive pole of diode D1, and the negative pole of diode D1 connects the positive port of VOUT; The terminals 4 of described inductance T1 connect positive pole and the VOUT negative terminal mouth of diode D2 simultaneously, and the negative pole of diode D2 connects the positive port of VOUT; Voltage between the terminals 1 of described inductance T1 and terminals 2 is Ui, and the voltage between terminals 3 and terminals 4 is U1, and the voltage between the positive port of VOUT and VOUT negative terminal mouth is U0; In work, at the positive half cycle of Ui, when namely going up just lower bearing, diode D1 conducting by forward voltage, diode D2 ends by reverse voltage, if ignore the decline of the forward voltage of rectifier diode, then output voltage Uo=U1; If Ui negative half period in circuit, i.e. negative lower timing, diode D1 ends by reverse voltage, diode D2 conducting by forward voltage, if ignore the decline of the forward voltage of rectifier diode, output voltage Uo=-U1, as can be seen here, in the positive-negative half-cycle of alternating current, flow through the oppositely consistent of load current, therefore the polarity of output voltage is constant, protects, use safety to circuit and load; Due to 2 times that current waveform in full-wave rectifier is halfwave rectifier, therefore, direct voltage is also 2 times of halfwave rectifier, i.e. Uo=0.9U1, and be the half of load current through the electric current of diode in full-wave rectifying circuit, the reverse voltage that rectifier diode bears is
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a LED display voltage stabilizing rectification circuit, is characterized in that, comprises VIN port, inductance T1, triode Q1, voltage stabilizing didoe D3 and VOUT port; Wherein, one end of VIN positive port contact resistance R1 and the collector electrode of triode Q1, the other end of resistance R1 is the base stage of connecting triode Q1, the negative pole of voltage stabilizing didoe D3 and one end of electric capacity C1 simultaneously, and the other end of electric capacity C1 connects the terminals 2 of the positive pole of voltage stabilizing didoe D3, VIN negative terminal mouth and inductance T1 simultaneously, and the emitter of triode Q1 connects the terminals 1 of inductance T1; Described electric capacity C1 is tantalum electric capacity, and triode Q1 is NPN type; The terminals 3 of described inductance T1 connect the positive pole of diode D1, and the negative pole of diode D1 connects the positive port of VOUT; The terminals 4 of described inductance T1 connect positive pole and the VOUT negative terminal mouth of diode D2 simultaneously, and the negative pole of diode D2 connects the positive port of VOUT.
2. LED display voltage stabilizing rectification circuit according to claim 1, is characterized in that, described triode Q1, voltage stabilizing didoe D3, resistance R1 and electric capacity C1 form voltage stabilizing circuit.
3. LED display voltage stabilizing rectification circuit according to claim 1, it is characterized in that, voltage between the terminals 1 of described inductance T1 and terminals 2 is Ui, and the voltage between terminals 3 and terminals 4 is U1, and the voltage between the positive port of VOUT and VOUT negative terminal mouth is U0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160962.3U CN204669227U (en) | 2015-03-21 | 2015-03-21 | A kind of LED display voltage stabilizing rectification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160962.3U CN204669227U (en) | 2015-03-21 | 2015-03-21 | A kind of LED display voltage stabilizing rectification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204669227U true CN204669227U (en) | 2015-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160962.3U Expired - Fee Related CN204669227U (en) | 2015-03-21 | 2015-03-21 | A kind of LED display voltage stabilizing rectification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204669227U (en) |
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2015
- 2015-03-21 CN CN201520160962.3U patent/CN204669227U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |