CN203522538U - Adjustable DC voltage-stabilizing power circuit - Google Patents
Adjustable DC voltage-stabilizing power circuit Download PDFInfo
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- CN203522538U CN203522538U CN201320562959.5U CN201320562959U CN203522538U CN 203522538 U CN203522538 U CN 203522538U CN 201320562959 U CN201320562959 U CN 201320562959U CN 203522538 U CN203522538 U CN 203522538U
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Abstract
The utility model discloses an adjustable DC voltage-stabilizing power circuit including an input circuit and a voltage-stabilizing output circuit. The input circuit is composed of a power switch S1, a power transformer T, a rectifier bridge unit RR and a filtering capacitor C1. The voltage-stabilizing output circuit is composed of a current-limiting resistor R, a capacitor C2, a capacitor C3, a light emitting diode VL, a voltage-stabilizing diode VS1, a voltage-stabilizing diode VS2, a voltage-stabilizing diode VS3, a voltage-stabilizing diode VS4, a voltage-stabilizing diode VS5, an output voltage selecting switch S2, a transistor V1 and a transistor V2. The adjustable DC voltage-stabilizing power circuit provided by the utility model consists of discrete elements and is stable in working, high in circuit efficiency and comparatively low in cost.
Description
Technical field
The utility model relates to supply unit, particularly a kind of adjustable D. C regulated circuit.
Background technology
D.C. regulated power supply is widely used, and very convenient, power supply is provided to some electronic equipments, instrument and meter and small household appliances.Current D.C. regulated power supply, its structure is to export low voltage voltage by transformer, the very large direct current of output ripple after bridge rectifier filtering.This D.C. regulated power supply is job insecurity not only, and circuit efficiency is low, volume large, cost is higher.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of adjustable D. C regulated circuit is provided.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of adjustable D. C regulated circuit, comprise input circuit and voltage-stabilizing output circuit, described input circuit is comprised of mains switch S1, power transformer T, rectifier bridge stack UR and filtering capacitor C1, and described voltage-stabilizing output circuit is comprised of current-limiting resistor R, capacitor C2, capacitor C3, light-emitting diode VL, voltage stabilizing didoe VS1～VS5, output voltage selector switch S2 and transistor V1, transistor V2.
It is the aluminium electrolytic capacitor of 25V that described capacitor C1 selects withstand voltage, and it is the aluminium electrolytic capacitor of 16V that described capacitor C2 and capacitor C3 all select withstand voltage, and it is the light-emitting diode of 2.3V, Φ 5mm that described light-emitting diode VL selects forward step-down; Described voltage stabilizing didoe VS1 selects 2CW11 type silicon voltage regulator diode, voltage stabilizing didoe VS2 selects 2CW12 type silicon voltage regulator diode, voltage stabilizing didoe VS3 selects 2CW14 type silicon voltage regulator diode, voltage stabilizing didoe VS4 selects 2CW17 type silicon voltage regulator diode, and voltage stabilizing didoe VS5 selects 2CW19 type silicon voltage regulator diode; Described rectifier bridge stack UR selects 1A, 50V type rectifier bridge stack, and transistor V1 selects 3DG6 type silicon NPN transistor, and transistor V2 selects 3DA92A type silicon NPN transistor.
The utlity model has following beneficial effect:
Adjustable D. C regulated circuit of the present utility model, adopts discrete component to be made, working stability, and also circuit efficiency is high, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
With reference to figure 1, a kind of adjustable D. C regulated circuit, comprise input circuit and voltage-stabilizing output circuit, described input circuit is comprised of mains switch S1, power transformer T, rectifier bridge stack UR and filtering capacitor C1, and described voltage-stabilizing output circuit is comprised of current-limiting resistor R, capacitor C2, capacitor C3, light-emitting diode VL, voltage stabilizing didoe VS1～VS5, output voltage selector switch S2 and transistor V1, transistor V2.
It is the aluminium electrolytic capacitor of 25V that described capacitor C1 selects withstand voltage, and it is the aluminium electrolytic capacitor of 16V that described capacitor C2 and capacitor C3 all select withstand voltage, and it is the light-emitting diode of 2.3V, Φ 5mm that described light-emitting diode VL selects forward step-down; Described voltage stabilizing didoe VS1 selects 2CW11 type silicon voltage regulator diode, voltage stabilizing didoe VS2 selects 2CW12 type silicon voltage regulator diode, voltage stabilizing didoe VS3 selects 2CW14 type silicon voltage regulator diode, voltage stabilizing didoe VS4 selects 2CW17 type silicon voltage regulator diode, and voltage stabilizing didoe VS5 selects 2CW19 type silicon voltage regulator diode; Described rectifier bridge stack UR selects 1A, 50V type rectifier bridge stack, and transistor V1 selects 3DG6 type silicon NPN transistor, and transistor V2 selects 3DA92A type silicon NPN transistor.
The operation principle of a kind of adjustable D. C regulated circuit of the present utility model: alternating current 220V voltage is after power transformer T step-down, rectifier bridge stack UR rectification and filtering capacitor C1 filtering, produce the direct voltage of 15V left and right, this voltage one tunnel directly adds to the collector electrode of transistor V1, another road adds to the base stage of transistor V1 after current-limiting resistor R current limliting, output after transistor V1, transistor V2 and light-emitting diode VL, voltage stabilizing didoe VS1～VS5 voltage stabilizing are adjusted.By stirring selector switch S2, change the base voltage of transistor V2, output voltage is changed thereupon.
Finally, it is also to be noted that, what more than enumerate is only specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model, all should think protection range of the present utility model.
Claims (2)
1. an adjustable D. C regulated circuit, comprise input circuit and voltage-stabilizing output circuit, it is characterized in that: described input circuit is comprised of mains switch S1, power transformer T, rectifier bridge stack UR and filtering capacitor C1, described voltage-stabilizing output circuit is comprised of current-limiting resistor R, capacitor C2, capacitor C3, light-emitting diode VL, voltage stabilizing didoe VS1～VS5, output voltage selector switch S2 and transistor V1, transistor V2.
2. a kind of adjustable D. C regulated circuit as claimed in claim 1, it is characterized in that: it is the aluminium electrolytic capacitor of 25V that described capacitor C1 selects withstand voltage, it is the aluminium electrolytic capacitor of 16V that described capacitor C2 and capacitor C3 all select withstand voltage, and it is the light-emitting diode of 2.3V, Φ 5mm that described light-emitting diode VL selects forward step-down; Described voltage stabilizing didoe VS1 selects 2CW11 type silicon voltage regulator diode, voltage stabilizing didoe VS2 selects 2CW12 type silicon voltage regulator diode, voltage stabilizing didoe VS3 selects 2CW14 type silicon voltage regulator diode, voltage stabilizing didoe VS4 selects 2CW17 type silicon voltage regulator diode, and voltage stabilizing didoe VS5 selects 2CW19 type silicon voltage regulator diode; Described rectifier bridge stack UR selects 1A, 50V type rectifier bridge stack, and transistor V1 selects 3DG6 type silicon NPN transistor, and transistor V2 selects 3DA92A type silicon NPN transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320562959.5U CN203522538U (en) | 2013-09-04 | 2013-09-04 | Adjustable DC voltage-stabilizing power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320562959.5U CN203522538U (en) | 2013-09-04 | 2013-09-04 | Adjustable DC voltage-stabilizing power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522538U true CN203522538U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320562959.5U Expired - Fee Related CN203522538U (en) | 2013-09-04 | 2013-09-04 | Adjustable DC voltage-stabilizing power circuit |
Country Status (1)
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| CN (1) | CN203522538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106372707A (en) * | 2016-08-26 | 2017-02-01 | 无锡卓信信息科技股份有限公司 | RFID wristband used for prison personnel locating |
-
2013
- 2013-09-04 CN CN201320562959.5U patent/CN203522538U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106372707A (en) * | 2016-08-26 | 2017-02-01 | 无锡卓信信息科技股份有限公司 | RFID wristband used for prison personnel locating |
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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: 20140402 Termination date: 20140904 |
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| EXPY | Termination of patent right or utility model |