CN102681585A - Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals - Google Patents
Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals Download PDFInfo
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- CN102681585A CN102681585A CN2012101896506A CN201210189650A CN102681585A CN 102681585 A CN102681585 A CN 102681585A CN 2012101896506 A CN2012101896506 A CN 2012101896506A CN 201210189650 A CN201210189650 A CN 201210189650A CN 102681585 A CN102681585 A CN 102681585A
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Abstract
The invention belongs to the technical fields of electronics and power supplies and relates to a current expansion circuit for a low-power integrated voltage stabilizer with three adjustable terminals. The current expansion circuit comprises a direct current power supply, a voltage stabilizing circuit, an isolating circuit, and a sample-amplification and voltage-stabilization output circuit. As the stabilized voltage currents output from the low-power voltage stabilizers with three terminals are not large, the requirement of actual power is difficult to meet; and although the special-purpose high-power voltage stabilization modules with excellent performance in the market can be selected, the special-purpose high-power voltage stabilization modules have the detect of high selling price, and the common non-special-purpose voltage stabilization modules are difficult to accept. By use of the current expansion circuit for the low-power integrated voltage stabilizer with three adjustable terminals, the defects can be overcome; and the current expansion circuit has the advantages of being concise in circuit structure, stable in working performance, low in manufacturing cost, and the like..
Description
Technical field
The invention belongs to electronic technology and power technique fields, is to expand current circuit about a kind of miniwatt three end adjustable voltage-regulating ic devices.
Background technology
Electric current of voltage regulation for some low power three terminal regulator himself is exported is little; For example: three terminal regulator self electric current of voltage regulation load capacity is 0.5A; Flow to 10A as if its load capacity is expanded, the output current of available 0.5A drives the large power triode expansion stream that many enlargement factors are big and parameter is consistent and solves.
Though the high-power Voltage stabilizing module of professional use, function admirable can be selected for use on the market, their ubiquity prices are high, general amateur purposes be difficult to defective such as acceptance.Expand current circuit with miniwatt three end adjustable voltage-regulating ic devices and can remedy and overcome these problems.The present invention has advantages such as circuit structure is succinct, stable work in work, low preparation cost.
Below specify miniwatt three end adjustable voltage-regulating ic devices of the present invention and expand current circuit related relevant technologies content in implementation process.
Summary of the invention
Goal of the invention and beneficial effect: the electric current of voltage regulation for some low power three terminal regulator himself is exported is little; Be difficult to satisfy the real power needs; Though the powerful Voltage stabilizing module of professional use, function admirable can be selected for use on the market, their ubiquity prices are high, general amateur purposes be difficult to defective such as acceptance.Expand current circuit with miniwatt three end adjustable voltage-regulating ic devices and can remedy and overcome these problems, the present invention has advantages such as circuit structure is succinct, stable work in work, low preparation cost.
The circuit working principle: it is when solving load current greater than three end adjustable voltage-regulating ic device nominal current values that miniwatt three end adjustable voltage-regulating ic devices of the present invention expand current circuit, solves the voltage stabilizing problem of big electric current with the way that enlarges electric current.When circuit enlarges electric current and does not still reach requiring of big electric current with 1 NPN large power triode; Optional two or many large power triode parallel connection uses; As: the electric current that three end adjustable voltage-regulating ic device IC1 (LM317) can only provide is 1.5A; Present embodiment can be extended to 20A with output current after in the voltage stabilizing output loop, inserting 2 NPN type superpower triodes (3DDl70); When 2 silicon rectifier diode D1～D2 in the circuit played buffer action, it can be with the parallel output end of pressure-stabilizing of delivering to of the output current of three end adjustable voltage-regulating ic device IC1 itself.Resistance R 2～R3 is respectively the power-balance resistance of NPN type superpower triode VT1～VT2.
Technical scheme: miniwatt three end adjustable voltage-regulating ic devices expand current circuit, and it is made up of direct supply, mu balanced circuit and buffer circuit, sampling amplification and voltage-stabilizing output circuit, and its characteristic comprises:
Mu balanced circuit and buffer circuit: form by three end adjustable voltage-regulating ic device IC1, linear potentiometer RP, resistance R 1 and silicon rectifier diode D1～D2; The input end (the 3rd pin) of three end adjustable voltage-regulating ic device IC1 meets the anodal VCC of direct supply; The adjustment end of three end adjustable voltage-regulating ic device IC1 (the 1st pin ADJ) links to each other with the end of linear potentiometer RP and an end of resistance R 1; The other end of linear potentiometer RP and lever arm connection circuit ground GND thereof; The other end of output terminal (the 2nd pin) the connecting resistance R1 of three end adjustable voltage-regulating ic device IC1 and the positive pole of silicon rectifier diode D1; It is anodal that the negative pole of silicon rectifier diode D1 meets silicon rectifier diode D2, and silicon rectifier diode D2 negative pole connects the burning voltage output terminal Vout;
Sampling is amplified and voltage-stabilizing output circuit: be made up of NPN type superpower triode VT1～VT2, power-balance resistance R 2～R3; The output terminal (the 2nd pin) of three end adjustable voltage-regulating ic device IC1 connects the base stage of NPN type superpower triode VT1 and the base stage of NPN type superpower triode VT2; The collector of the collector of NPN type superpower triode VT1 and NPN type superpower triode VT2 meets the anodal VCC of direct supply; Connect the burning voltage output terminal Vout after the emitter serial connection power-balance resistance R 2 of NPN type superpower triode VT1, connect the burning voltage output terminal Vout after the collector series connection power-balance resistance R 3 of NPN type superpower triode VT2;
The negative pole of direct supply links to each other with circuit ground GND.
Description of drawings
Embodiment
Expand the fundamental diagram and the description of drawings of current circuit according to the three end adjustable voltage-regulating ic devices of miniwatt shown in the accompanying drawing 1; And according to the annexation between the components and parts in the said circuit of summary of the invention, and the components and parts technical parameter described in the embodiment requires to implement to realize the present invention.
The selection of components and parts and technical parameter thereof
The component parameter of following embodiment is an example with voltage stabilizing output current 20A:
IC1 is three end adjustable voltage-regulating ic devices, and the model of selecting for use is LM317;
VT1, VT2 are NPN type superpower triode, require IC (A) >=20A, Pcm200; β >=90, packing forms is the TO-3P II, the model of selecting for use is 3DDl70; Require the technical parameter of VT1, VT2 consistent as far as possible, and require VT1, VT2 must add heating radiator in use;
D1, D2 are silicon rectifier diode, and the model of selecting for use is 1N4001;
Resistance is all selected metalfilmresistor for use, and the resistance of resistance R 1 is 240 Ω, and power is 1/4W; Resistance R 2～R3 is the power-balance resistance of NPN type superpower triode, and its resistance is 0.02～0.04 Ω, and power is 2W;
The resistance of linear potentiometer RP is 7.8K Ω, and the model of selecting for use is WH9-K1.
Circuit production main points and circuit debugging method
The electronic devices and components performance of selecting for use in the requirement miniwatt three end adjustable voltage-regulating ic devices expansion current circuit is intact; And the annexation of components and parts is welded in the accompanying drawing 1 to specifications; After physical connection line and welding quality process scrutiny were errorless, circuit need not debugged basically and get final product operate as normal;
When using NPN type superpower triode 3DDl70 and three end adjustable voltage-regulating ic device LM317, be necessary for the heating radiator that they install sufficient size additional;
Because expanding current circuit, miniwatt three end adjustable voltage-regulating ic devices belong to serial regulating circuit, thus require the input voltage value of direct supply and the pressure reduction between the voltage stabilizing output voltage values to exceed more than the 3.5V, otherwise will influence the voltage stabilizing output effect; Change the resistance of circuit neutral line potentiometer RP, can adjust the output valve of burning voltage;
More consistent when the technical parameter of NPN type superpower triode, the value of power-balance resistance R 2～R3 just can be more little, helps reducing the power attenuation of direct supply like this; Otherwise the technical parameter of NPN type superpower triode is discrete more, and the value of power-balance resistance R 2～R3 should be bigger than normal.
Claims (1)
1. miniwatt three end adjustable voltage-regulating ic devices expand current circuit, and it is made up of direct supply, mu balanced circuit and buffer circuit, sampling amplification and voltage-stabilizing output circuit, and its characteristic comprises:
Mu balanced circuit and buffer circuit are made up of three end adjustable voltage-regulating ic device IC1, linear potentiometer RP, resistance R 1 and silicon rectifier diode D1～D2; The input end (the 3rd pin) of three end adjustable voltage-regulating ic device IC1 meets the anodal VCC of direct supply; The adjustment end of three end adjustable voltage-regulating ic device IC1 (the 1st pin ADJ) links to each other with the end of linear potentiometer RP and an end of resistance R 1; The other end of linear potentiometer RP and lever arm connection circuit ground GND thereof; The other end of output terminal (the 2nd pin) the connecting resistance R1 of three end adjustable voltage-regulating ic device IC1 and the positive pole of silicon rectifier diode D1; The negative pole of silicon rectifier diode D1 connects the positive pole of silicon rectifier diode D2, and the negative pole of silicon rectifier diode D2 connects the burning voltage output terminal Vout;
Sampling is amplified and voltage-stabilizing output circuit is made up of NPN type superpower triode VT1～VT2, power-balance resistance R 2～R3; The output terminal (the 2nd pin) of three end adjustable voltage-regulating ic device IC1 connects the base stage of NPN type superpower triode VT1 and the base stage of NPN type superpower triode VT2; The collector of the collector of NPN type superpower triode VT1 and NPN type superpower triode VT2 meets the anodal VCC of direct supply; Connect the burning voltage output terminal Vout after the emitter serial connection power-balance resistance R 2 of NPN type superpower triode VT1, connect the burning voltage output terminal Vout after the collector series connection power-balance resistance R 3 of NPN type superpower triode VT2;
The negative pole of direct supply links to each other with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101896506A CN102681585A (en) | 2012-06-08 | 2012-06-08 | Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101896506A CN102681585A (en) | 2012-06-08 | 2012-06-08 | Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals |
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| CN102681585A true CN102681585A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101896506A Pending CN102681585A (en) | 2012-06-08 | 2012-06-08 | Current expansion circuit for low-power integrated voltage stabilizer with three adjustable terminals |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102657471A (en) * | 2012-03-19 | 2012-09-12 | 福州高奇智芯电源科技有限公司 | Electric cooker capable of cooking according to menu data |
| CN103825456A (en) * | 2014-02-12 | 2014-05-28 | 中国航天时代电子公司 | Positive-negative power supply current expanding apparatus in H bridge control circuit |
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| CN2106389U (en) * | 1991-11-30 | 1992-06-03 | 贾佐鑫 | Voltage-stabilizing protector of communication equipment for ship |
| US20060097709A1 (en) * | 2004-11-06 | 2006-05-11 | Hon Hai Precision Industry Co., Ltd. | Linear voltage regulator |
| CN201477462U (en) * | 2009-08-27 | 2010-05-19 | 青岛海信电器股份有限公司 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
| CN101873120A (en) * | 2009-04-27 | 2010-10-27 | 武汉市创佳源电子有限公司 | Application of electronic potentiometer module in direct current stabilized voltage power supply |
| CN201789414U (en) * | 2010-07-30 | 2011-04-06 | 安徽华东光电技术研究所 | Current boosting circuit of three terminal regulator |
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2012
- 2012-06-08 CN CN2012101896506A patent/CN102681585A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106389U (en) * | 1991-11-30 | 1992-06-03 | 贾佐鑫 | Voltage-stabilizing protector of communication equipment for ship |
| US20060097709A1 (en) * | 2004-11-06 | 2006-05-11 | Hon Hai Precision Industry Co., Ltd. | Linear voltage regulator |
| CN101873120A (en) * | 2009-04-27 | 2010-10-27 | 武汉市创佳源电子有限公司 | Application of electronic potentiometer module in direct current stabilized voltage power supply |
| CN201477462U (en) * | 2009-08-27 | 2010-05-19 | 青岛海信电器股份有限公司 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
| CN201789414U (en) * | 2010-07-30 | 2011-04-06 | 安徽华东光电技术研究所 | Current boosting circuit of three terminal regulator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102657471A (en) * | 2012-03-19 | 2012-09-12 | 福州高奇智芯电源科技有限公司 | Electric cooker capable of cooking according to menu data |
| CN103825456A (en) * | 2014-02-12 | 2014-05-28 | 中国航天时代电子公司 | Positive-negative power supply current expanding apparatus in H bridge control circuit |
| CN103825456B (en) * | 2014-02-12 | 2017-03-22 | 中国航天时代电子公司 | Positive-negative power supply current expanding apparatus in H bridge control circuit |
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Application publication date: 20120919 |