CN2881755Y - Digital adjustable voltage-stabilizing power supply circuit - Google Patents
Digital adjustable voltage-stabilizing power supply circuit Download PDFInfo
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- CN2881755Y CN2881755Y CN 200620069824 CN200620069824U CN2881755Y CN 2881755 Y CN2881755 Y CN 2881755Y CN 200620069824 CN200620069824 CN 200620069824 CN 200620069824 U CN200620069824 U CN 200620069824U CN 2881755 Y CN2881755 Y CN 2881755Y
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Abstract
The utility model relates to a digital adjustable voltage-stabilizing power supply circuit, which comprises an integrated voltage-stabilizing chip has an input end electrically connected to a positive pole of an external power supply, and an output end electrically connected to a negative pole of the external power supply. A resistor is series connected between an adjusting end and the output end of the integrated voltage-stabilizing chip. The adjusting end of the integrated voltage-stabilizing chip is electrically connected to an output end of a digital potential device. The digital potential device has a control end electrically connected to a control system. The control system is either an SCM system or a microcomputer system. The resistance value of the digital potential device is adjusted by the SCM system or the microcomputer system so as to adjust the output voltage of the voltage-stabilizing power supply circuit.
Description
[technical field]
The utility model relates to the D.C. regulated power supply technology, particularly a kind of digital adjustable voltage-stabilized power supply circuit that utilizes Single Chip Microcomputer (SCM) system or microsystem to control.
[background technology]
At present, fast development along with science and technology, many high-precision electronic devices have been developed, the speed of these electronic device operations is more and more faster, the efficient of operation is more and more higher, the field of using is also more and more wider, and guarantees that the pacing items of these electronic device operate as normal is to have stable working power to provide stable operating voltage for it, and it is D.C. regulated power supply that a lot of electronic devices all require its working power.
In D.C. regulated power supply, integrated stabilized voltage supply chip has obtained using widely with its superior voltage regulation performance, perfect defencive function and easy using method.In the D.C. regulated power supply of Adjustable Output Voltage, especially commonly used with floated scalable integrated regulator, LM317 is wherein modal representational a kind of circuit of three-terminal voltage-stabilizing integrated.Fig. 1 is existing stabilized voltage supply commonly used, this stabilized voltage supply adopts fixedly output voltage, the range of application of this stabilized voltage supply reduces to some extent, it is formed structure and mainly comprises: external power source 10, integrated voltage stabilizing chip 20, load 30, wherein, the input end of integrated voltage stabilizing chip 20 and 10 anodal connections of external power source, the output terminal of integrated voltage stabilizing chip 20 is connected with load 30.Introduce another kind of stabilized voltage supply commonly used below, what this stabilized voltage supply adopted is to regulate output voltage by the knob potentiometer, its typical application circuit as shown in Figure 2, this mu balanced circuit mainly comprises: external power source 10, integrated voltage stabilizing chip 20, load 30, resistance R 1, knob potentiometer R2, be connected a resistance R 1 between the output terminal of wherein integrated voltage stabilizing chip 20 and the adjustable side, and the end of knob potentiometer R2 is connected with the adjustable side of integrated voltage stabilizing chip 20, and other end ground connection, there is not direct earth terminal on the integrated voltage stabilizing chip of this class, chip itself does not bear whole input voltages, under the working condition of high input and output voltage, have only knob potentiometer R2 to bear high voltage, integrated voltage stabilizing chip 20 is in suspended state over the ground, only bear the poor of input and output voltage, thereby its operating voltage is not subjected to the withstand voltage restriction of integrated circuit, but this adhesive integrated circuit all is to regulate output voltage to regulate variable knob potentiometer R2, be difficult to be used with digital circuitry such as Single Chip Microcomputer (SCM) system or microsystem, sometimes can see a kind of pressure regulation scheme is the resistance of arranging a plurality of different resistances on the position of knob potentiometer R2, utilize electronic switch to switch these resistance and regulate output voltage, to constitute digitized stabilized voltage supply, but this kind digitizing stabilized voltage supply can't utilize existing digital technology to regulate the output voltage of traditional three terminal regulator flexibly.
In view of this, in fact be necessary to propose a kind ofly can make full use of existing digitizing technique, give full play to the circuit arrangement of integrated voltage stabilizing chip performance.
[summary of the invention]
The purpose of this utility model is exactly the adjustable voltage-stabilized power supply circuit of a kind of numeral that proposes in order to solve existing issue, and it utilizes Single Chip Microcomputer (SCM) system or microsystem that the output voltage of the adjustable direct current regulation circuit of this numeral is controlled.
The utility model proposes the adjustable voltage-stabilized power supply circuit of a kind of numeral, comprise an integrated voltage stabilizing chip, the input end of this integrated voltage stabilizing chip is connected with the positive pole of external power source, and the output terminal of this integrated voltage stabilizing chip is connected with load, be connected in series a resistance between the adjustable side of this integrated voltage stabilizing chip and the output terminal, the adjustable side of this integrated voltage stabilizing chip is connected with the output terminal of digital regulation resistance, and the control end of this digital regulation resistance is connected with control system, this control system can be Single Chip Microcomputer (SCM) system or microsystem, so utilize Single Chip Microcomputer (SCM) system or microsystem that the output resistance of this digital regulation resistance is regulated, thereby regulate the output voltage of this voltage-stabilized power supply circuit.
Compared with prior art, the number of elements that the adjustable voltage-stabilized power supply circuit of the utility model numeral uses is few, the integrated level height of the product that makes, and stability is good; And the degree of regulation height, good reliability.
[description of drawings]
The existing fixedly voltage-stabilized power supply circuit structural representation of output voltage of Fig. 1.
The voltage-stabilized power supply circuit structural representation of the existing knob potentiometer adjustable output voltage of Fig. 2.
The structural representation of the adjustable voltage-stabilized power supply circuit of Fig. 3 the utility model numeral.
The circuit diagram of the adjustable voltage-stabilized power supply circuit of Fig. 4 the utility model numeral.
Fig. 5 the utility model adjustable voltage-stabilized power supply circuit of numeral circuit diagram in an embodiment.
[embodiment]
Below in conjunction with accompanying drawing the adjustable voltage-stabilized power supply circuit of the utility model numeral is described in detail.
See also Fig. 3, Fig. 4, Fig. 5, Fig. 3 is the structural representation of the adjustable stabilized voltage supply of the utility model numeral, Fig. 4 is the circuit diagram of the adjustable voltage-stabilized power supply circuit of the utility model numeral, and Fig. 5 is the utility model adjustable voltage-stabilized power supply circuit of numeral circuit diagram in an embodiment.
The adjustable voltage-stabilized power supply circuit of the utility model numeral comprises an integrated voltage stabilizing chip 20, the integrated voltage stabilizing chip 20 that uses in the present embodiment is three terminal regulator LM317, the input end of this integrated voltage stabilizing chip 20 (in) is connected with the positive pole of external power source 10, an and ground connection coupling capacitance C1 in parallel between the positive pole of the input end of integrated voltage stabilizing chip 20 (in) and external power source 10, be connected a resistance R 1 between the adjustable side of this integrated voltage stabilizing chip 20 (adj) and the output terminal (out), the output terminal of this integrated voltage stabilizing chip 20 (out) is connected with load 30, an and ground connection coupling capacitance C2 in parallel between the output terminal of integrated voltage stabilizing chip 20 (out) and the load 30, the adjustable side of this integrated voltage stabilizing chip 20 (adj) is connected with the output terminal of digital regulation resistance 50, the model of the digital regulation resistance 50 that uses in the present embodiment is MAX5460, the high-end pin of the potentiometer of MAX5460 connects together as the output terminal of this digital regulation resistance 50, the potentiometer low side pin of MAX5460 and GND pin connect together as the earth terminal (GND) of digital regulation resistance 50, the power end of this digital regulation resistance 50 (Vcc) is connected with accessory power supply 40, the control end of this digital regulation resistance 50 is connected with control system 60, this control end comprises: sheet selects pin CS1, CS2, digital regulation resistance resistance lifting/lowering control pin U/D, cursor slide moves control pin INC, and this control system 60 can be Single Chip Microcomputer (SCM) system or microsystem.
Be described in detail below in conjunction with the principle of work of accompanying drawing the adjustable voltage-stabilized power supply circuit of the utility model numeral.
According to the characteristic of LM317, its output voltage is that the magnitude of voltage between output terminal (out) and adjustable side (adj) can be stabilized in 1.25 volts (V), and output voltage that then should the adjustable voltage-stabilized power supply circuit of numeral is:
Vout=1.25* (1+Rw/R1), unit are volt (V)
Rw is the output quantity of digital regulation resistance, the value of output voltage V out that as can be seen from the above equation should the adjustable voltage-stabilized power supply circuit of numeral and the input voltage of the utility model circuit be direct relation not, can improve the stability of output voltage V out like this, the output quantity Rw of the value of output voltage V out and digital regulation resistance MAX5460 relation in direct ratio, and the value of Rw can be by Single Chip Microcomputer (SCM) system or microsystem control output, thereby realize the mu balanced circuit that intelligent control figure is adjustable, the resistance relation in direct ratio of the degree of regulation of the value of this circuit output voltage Vout and R1, be that R1 is big more, the precision of output voltage V out is high more, in the present embodiment, the resistance of this R1 is determined, certainly R1 also can be a digital regulation resistance, it is also by Single Chip Microcomputer (SCM) system or microsystem control, regulating its resistance, thus the intelligent output accuracy of regulating this voltage-stabilized power supply circuit.
Claims (4)
1, the adjustable voltage-stabilized power supply circuit of a kind of numeral, comprise: an integrated voltage stabilizing chip, it is provided with an input end, an adjustable side and an output terminal, wherein input end is connected with external power source, the adjustable side is connected with the output terminal of digital regulation resistance, output terminal is connected with load, and is connected a resistance between adjustable side and output terminal; It is characterized in that: the adjustable voltage-stabilized power supply circuit of this numeral also comprises a digital regulation resistance, its control end is connected with a control system, its output terminal is connected with the adjustable side of integrated voltage stabilizing chip, its power end is connected with accessory power supply, so the output resistance of this digital regulation resistance is regulated, thereby regulate the output voltage of this voltage-stabilized power supply circuit by control system.
2, the adjustable voltage-stabilized power supply circuit of numeral according to claim 1 is characterized in that: this control system is single-chip computer control system or Control System of Microcomputer.
3, the adjustable voltage-stabilized power supply circuit of numeral according to claim 1 is characterized in that: the resistance that is connected between the adjustable side of this integrated voltage stabilizing chip and the output terminal is the resistance that resistance is determined.
4, the adjustable voltage-stabilized power supply circuit of numeral according to claim 1, it is characterized in that: the resistance that is connected between the adjustable side of this integrated voltage stabilizing chip and the output terminal is a digital regulation resistance, it is also by Single Chip Microcomputer (SCM) system or microsystem control, regulating its resistance, thus the intelligent output accuracy of regulating this voltage-stabilized power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069824 CN2881755Y (en) | 2006-03-02 | 2006-03-02 | Digital adjustable voltage-stabilizing power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069824 CN2881755Y (en) | 2006-03-02 | 2006-03-02 | Digital adjustable voltage-stabilizing power supply circuit |
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| Publication Number | Publication Date |
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| CN2881755Y true CN2881755Y (en) | 2007-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620069824 Expired - Fee Related CN2881755Y (en) | 2006-03-02 | 2006-03-02 | Digital adjustable voltage-stabilizing power supply circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478874A (en) * | 2010-11-30 | 2012-05-30 | 英业达股份有限公司 | Digital adjustable constant-voltage source and method for digitally controlling constant-voltage source |
| CN103326577A (en) * | 2013-07-11 | 2013-09-25 | 台达电子电源(东莞)有限公司 | Regulating equipment for output voltage of switching power supply, regulating method and integrated chip |
| CN103453950A (en) * | 2013-09-10 | 2013-12-18 | 昆山奥德鲁自动化技术有限公司 | Voltage stabilizing circuit |
| CN103869864A (en) * | 2014-03-26 | 2014-06-18 | 中国科学院光电技术研究所 | High-voltage square wave driving signal bottom level stabilizing device |
| CN107748589A (en) * | 2017-10-18 | 2018-03-02 | 京东方科技集团股份有限公司 | A kind of adjustable circuit of output voltage and its voltage adjusting method and display device |
| CN111103916A (en) * | 2019-12-24 | 2020-05-05 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Programmable voltage regulator |
-
2006
- 2006-03-02 CN CN 200620069824 patent/CN2881755Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478874A (en) * | 2010-11-30 | 2012-05-30 | 英业达股份有限公司 | Digital adjustable constant-voltage source and method for digitally controlling constant-voltage source |
| CN102478874B (en) * | 2010-11-30 | 2014-01-15 | 英业达股份有限公司 | Digital adjustable constant-voltage source and method for digitally controlling constant-voltage source |
| CN103326577A (en) * | 2013-07-11 | 2013-09-25 | 台达电子电源(东莞)有限公司 | Regulating equipment for output voltage of switching power supply, regulating method and integrated chip |
| CN103326577B (en) * | 2013-07-11 | 2015-09-02 | 台达电子电源(东莞)有限公司 | The conditioning equipment of switch power source output voltage, method of adjustment and integrated chip |
| CN103453950A (en) * | 2013-09-10 | 2013-12-18 | 昆山奥德鲁自动化技术有限公司 | Voltage stabilizing circuit |
| CN103869864A (en) * | 2014-03-26 | 2014-06-18 | 中国科学院光电技术研究所 | High-voltage square wave driving signal bottom level stabilizing device |
| CN107748589A (en) * | 2017-10-18 | 2018-03-02 | 京东方科技集团股份有限公司 | A kind of adjustable circuit of output voltage and its voltage adjusting method and display device |
| CN111103916A (en) * | 2019-12-24 | 2020-05-05 | 江苏集萃微纳自动化系统与装备技术研究所有限公司 | Programmable voltage regulator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070321 |