CN103944416A - Multi-output switch direct current voltage stabilizing power source with simple circuit - Google Patents

Multi-output switch direct current voltage stabilizing power source with simple circuit Download PDF

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Publication number
CN103944416A
CN103944416A CN201410180267.3A CN201410180267A CN103944416A CN 103944416 A CN103944416 A CN 103944416A CN 201410180267 A CN201410180267 A CN 201410180267A CN 103944416 A CN103944416 A CN 103944416A
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circuit
output
wave filtering
voltage
current rectifying
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CN201410180267.3A
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张新安
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张新安
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Priority to CN201410180267.3A priority Critical patent/CN103944416A/en
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Abstract

A multi-output switch direct current voltage stabilizing power source with a simple circuit is composed of an EMI filter circuit, a rectification filter circuit, a high frequency oscillation and voltage stabilizing protection circuit, a +/-15 V rectification filter circuit, a +/-5 V rectification filter circuit and an output voltage feedback circuit, wherein connection relations are as shown in the attached figure. The high frequency oscillation and voltage stabilizing protection circuit uses a novel single three-end switch power chip, and the output voltage feedback circuit uses a three-end reference source and a photoelectric coupler. +15 V stabilized direct current voltage, -15 V stabilized direct current voltage and +5 V stabilized direct current voltage can be output simultaneously, the maximum output current is 1.5 A, and the functions of overcurrent protection and overheating protection are achieved. The multi-output switch direct current voltage stabilizing power source with the simple circuit has the advantages of being small in number of components, simple in circuit, low in cost, small in size, light in weight, high in efficiency, good in voltage stabilizing performance and full in protection function.

Description

The simple multi-output switching D.C. regulated power supply of a kind of circuit
Technical field
The present invention relates to D.C. regulated power supply technical field, be specifically related to the simple multi-output switching D.C. regulated power supply of a kind of circuit.
Background technology
D.C. regulated power supply is one of important component part of each electronic product, is also widely used in the numerous areas such as the maintenance of teaching, scientific research and electronic product.In the market with electronic product in the D.C. regulated power supply that uses substantially have linear direct current regulated power supply and switch DC stabilized voltage power supply two classes.The advantage of linear direct current regulated power supply is that voltage regulation performance is good, and output voltage ripple is little, and circuit is simple, and major defect is that the volume of step-down transformer is large, weight is large, cost is high, the pressure drop of adjustment pipe is larger, and power consumption is high, and the efficiency of stabilized voltage power supply is low.The advantage of conventional switching power supply is that efficiency is high, and major defect is that electronic devices and components quantity is many, failure rate is high, maintenance difficulty is large.
Summary of the invention
For solving the deficiency of existing D.C. regulated power supply, the present invention discloses the simple multi-output switching D.C. regulated power supply of a kind of circuit.The higher-order of oscillation of this switch DC stabilized voltage power supply and protective circuit of voltage regulation adopt new single chip three-terminal switch power supply chip; output voltage feedback circuit adopts three end a reference source and photoelectrical couplers; can simultaneously export ± 15V and+tri-groups of stable DC voltages of 5V, maximum output current is 1.5A.Can be widely used in the field such as the power supply of teaching, scientific research, electronic product and the maintenance of electronic product.
For achieving the above object, the present invention adopts following technical scheme: the present invention is made up of EMI filter circuit, current rectifying and wave filtering circuit, the higher-order of oscillation and protective circuit of voltage regulation, ± 15V current rectifying and wave filtering circuit ,+5V current rectifying and wave filtering circuit and output voltage feedback circuit.The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of the higher-order of oscillation and protective circuit of voltage regulation, output termination ± 15V current rectifying and wave filtering circuit and+input of 5V current rectifying and wave filtering circuit; The output of input termination+5V current rectifying and wave filtering circuit of output voltage feedback circuit, the feedback voltage input of the output termination higher-order of oscillation and protective circuit of voltage regulation.Can simultaneously export ± 15V and+tri-groups of stable DC voltages of 5V, maximum output current is 1.5A.
Good effect of the present invention is: component number is little, and circuit is simple, with low cost, and volume is little, lightweight, efficiency is high, voltage regulation performance is good, and defencive function is perfect.
Brief description of the drawings
Fig. 1 is block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1, the present invention is made up of EMI filter circuit, current rectifying and wave filtering circuit, the higher-order of oscillation and protective circuit of voltage regulation, ± 15V current rectifying and wave filtering circuit ,+5V current rectifying and wave filtering circuit and output voltage feedback circuit.The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of the higher-order of oscillation and protective circuit of voltage regulation, output termination ± 15V current rectifying and wave filtering circuit and+input of 5V current rectifying and wave filtering circuit; The output of input termination+5V current rectifying and wave filtering circuit of output voltage feedback circuit, the feedback voltage input of the output termination higher-order of oscillation and protective circuit of voltage regulation.Can simultaneously export ± 15V and+tri-groups of stable DC voltages of 5V, maximum output current is 1.5A.
As shown in Figure 2.
EMI filter circuit is made up of capacitor C 1, C12 and common mode inductance L1, and the high-frequency electromagnetic that can suppress between mains supply and switch DC stabilized voltage power supply disturbs.C1, C12 are used for suppressing series mode interference signal, and L1 is used for suppressing common mode interference signal.
Current rectifying and wave filtering circuit is made up of bridge rectifier BD1 and filter capacitor C2.To the line voltage rectifying and wave-filtering of input, by the direct voltage of the 300V left and right obtaining, be the higher-order of oscillation and protective circuit of voltage regulation power supply.
The higher-order of oscillation and protective circuit of voltage regulation be by monolithic three-terminal switch power supply chip TOP225Y, resistance R 1, capacitor C 3, C4, the armature winding N1 composition of diode D1 and switch transformer T1.TOP225Y internal high-voltage starts biasing circuit, 100kHz high-frequency generator, high pressure N channel power MOS field effect transistor, voltage type PWM controller, bias regulator in parallel, reference voltage circuit, error amplifier and fault secure circuit.The peak voltage that when D1, R1 and C3 turn-off for suppressing the MOS field effect tube of TOP225Y, switch transformer T1 leakage inductance produces, C4 is the filter capacitor of TOP225Y feedback voltage input.
± 15V current rectifying and wave filtering circuit is by the secondary winding N2 of switch transformer T1, rectifier diode D2, D3, filter capacitor C5, C6, C7, C8 and filter inductance L2, L3 composition.By the induced voltage rectifying and wave-filtering of the secondary winding N2 of switch transformer T1, the stable DC voltage of output ± 15V.
+ 5V current rectifying and wave filtering circuit is by the secondary winding N3 of switch transformer T1, rectifier diode D4, filter capacitor C9, C10 and filter inductance L4 composition.By the induced voltage rectifying and wave-filtering of the secondary winding N3 of derailing switch T1, the stable DC voltage of output+5V.
Output voltage feedback circuit is by the secondary winding N4 of switch transformer T1, rectifier diode D5, filter capacitor C11, current-limiting resistance R2, sample resistance R3, R4, three end a reference source TL431 and photoelectrical coupler PC871 composition.The induced voltage rectifying and wave-filtering of the current rectifying and wave filtering circuit of D5, C11 composition to N4 winding is the phototriode power supply in PC871 by the direct voltage obtaining.R3, R4 composition output voltage sample circuit, + 5V output voltage is through R3, the sampling voltage obtaining after R4 dividing potential drop is added to the REF end of TL431, control the electric current of TL431 from negative electrode to anode, this electric current directly drives the luminous component of photoelectrical coupler PC871, in the time that+5V output voltage has the main trend of change, the voltage of REF end increases thereupon, cause the electric current that flows through TL431 to increase, the luminous enhancing of photoelectrical coupler PC871, the feedback voltage of sensitization end output increases, TOP225Y is become after large feedback voltage control by this, output duty cycle reduces, output voltage falls after rise thereupon.Above-mentioned workflow will reach balance within the extremely short time, and Vref=2.5V when balance, due to R3=R4, so be output as stable 5V direct voltage.
The switch DC stabilized voltage power supply of the present invention's design; the higher-order of oscillation and protective circuit of voltage regulation adopt new single chip three-terminal switch power supply chip; output voltage feedback circuit adopts three end a reference source and photoelectrical couplers; component number is little; circuit is simple; with low cost, volume is little, lightweight, efficiency is high, voltage regulation performance is good, and defencive function is perfect.When mains input voltage changes within the scope of 90~264VAC, in nominal load situation, the regulation of actual measurement output voltage is 0.78%.At the specified input voltage of 220VAC, when load changes from 10%~100% of rated value, actual measurement load regulation is 0.14%, and in specified input voltage and nominal load situation, the efficiency of actual measurement power supply is 82.5%, has overcurrent, overheat protective function simultaneously.
The switch DC stabilized voltage power supply of the present invention's design, can simultaneously export ± 15V and+tri-groups of stable DC voltages of 5V are the power supply of digital circuit and amplifier, can be widely used in the field such as the power supply of teaching, scientific research, electronic product and the maintenance of electronic product, there are wide market prospects.
It should be pointed out that above explanation is not limitation of the present invention, amendment, replacement, distortion or interpolation that those skilled in the art make in essential scope of the present invention, also belong to protection scope of the present invention.

Claims (6)

1. the simple multi-output switching D.C. regulated power supply of circuit, is characterized in that: it is made up of EMI filter circuit, current rectifying and wave filtering circuit, the higher-order of oscillation and protective circuit of voltage regulation, ± 15V current rectifying and wave filtering circuit ,+5V current rectifying and wave filtering circuit and output voltage feedback circuit; The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of the higher-order of oscillation and protective circuit of voltage regulation, output termination ± 15V current rectifying and wave filtering circuit and+input of 5V current rectifying and wave filtering circuit; The output of input termination+5V current rectifying and wave filtering circuit of output voltage feedback circuit, the feedback voltage input of the output termination higher-order of oscillation and protective circuit of voltage regulation.
2. the simple multi-output switching D.C. regulated power supply of a kind of circuit according to claim 1, is characterized in that: EMI filter circuit is made up of capacitor C 1, C12 and common mode inductance L1.
3. the simple multi-output switching D.C. regulated power supply of a kind of circuit according to claim 1; it is characterized in that: the higher-order of oscillation and protective circuit of voltage regulation are by monolithic three-terminal switch power supply chip TOP225Y; resistance R 1, capacitor C 3, C4, the armature winding N1 composition of diode D1 and switch transformer T1.
4. the simple multi-output switching D.C. regulated power supply of a kind of circuit according to claim 1, it is characterized in that: ± 15V current rectifying and wave filtering circuit is by the secondary winding N2 of switch transformer T1, rectifier diode D2, D3, filter capacitor C5, C6, C7, C8 and filter inductance L2, L3 composition.
5. the simple multi-output switching D.C. regulated power supply of a kind of circuit according to claim 1, is characterized in that :+5V current rectifying and wave filtering circuit is by the secondary winding N3 of switch transformer T1, rectifier diode D4, filter capacitor C9, C10 and filter inductance L4 composition.
6. the simple multi-output switching D.C. regulated power supply of a kind of circuit according to claim 1, it is characterized in that: output voltage feedback circuit is by the secondary winding N4 of switch transformer T1, rectifier diode D5, filter capacitor C11, current-limiting resistance R2, sample resistance R3, R4, three end a reference source TL431 and photoelectrical coupler PC871 composition.
CN201410180267.3A 2014-05-02 2014-05-02 Multi-output switch direct current voltage stabilizing power source with simple circuit Pending CN103944416A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104980048A (en) * 2015-08-08 2015-10-14 张新安 Power adapter with low cost
CN105262058A (en) * 2015-10-09 2016-01-20 无锡众扬金属制品有限公司 All-in-one split machine power supply
CN105305826A (en) * 2014-07-28 2016-02-03 苏州弗莱希智能科技有限公司 Multi-output switching power supply circuit
CN106357117A (en) * 2016-08-31 2017-01-25 广东欧曼科技股份有限公司 Non-isolated switching power supply for high-voltage light strip
WO2018040132A1 (en) * 2016-08-31 2018-03-08 广东欧曼科技股份有限公司 Non-isolated switched power supply for high voltage led strip
CN108039826A (en) * 2017-12-15 2018-05-15 广东云耕数字技术有限公司 A kind of intelligent power supply power supply
CN109194115A (en) * 2018-08-29 2019-01-11 合肥德铭电子有限公司 Cavity mirror system electromagnetism suppressing device and cavity mirror system
WO2020029036A1 (en) * 2018-08-06 2020-02-13 深圳配天智能技术研究院有限公司 Switching power supply for electric vehicle and vehicle-mounted air conditioner compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202111631U (en) * 2011-06-09 2012-01-11 上海博湃电子科技有限公司 Power supply for network electric power instrument
CN202652086U (en) * 2012-06-01 2013-01-02 四川极度电控系统制造有限责任公司 Flyback multiplexed output switching power supply
CN203233322U (en) * 2013-05-09 2013-10-09 湖南工程学院 Multiplexed output fly-back switching power supply
CN203872072U (en) * 2014-05-02 2014-10-08 湖南科技学院 Multiple-output switching DC stabilized power supply with simple circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202111631U (en) * 2011-06-09 2012-01-11 上海博湃电子科技有限公司 Power supply for network electric power instrument
CN202652086U (en) * 2012-06-01 2013-01-02 四川极度电控系统制造有限责任公司 Flyback multiplexed output switching power supply
CN203233322U (en) * 2013-05-09 2013-10-09 湖南工程学院 Multiplexed output fly-back switching power supply
CN203872072U (en) * 2014-05-02 2014-10-08 湖南科技学院 Multiple-output switching DC stabilized power supply with simple circuit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305826A (en) * 2014-07-28 2016-02-03 苏州弗莱希智能科技有限公司 Multi-output switching power supply circuit
CN104980048A (en) * 2015-08-08 2015-10-14 张新安 Power adapter with low cost
CN105262058A (en) * 2015-10-09 2016-01-20 无锡众扬金属制品有限公司 All-in-one split machine power supply
CN106357117A (en) * 2016-08-31 2017-01-25 广东欧曼科技股份有限公司 Non-isolated switching power supply for high-voltage light strip
WO2018040132A1 (en) * 2016-08-31 2018-03-08 广东欧曼科技股份有限公司 Non-isolated switched power supply for high voltage led strip
CN108039826A (en) * 2017-12-15 2018-05-15 广东云耕数字技术有限公司 A kind of intelligent power supply power supply
CN108039826B (en) * 2017-12-15 2019-08-27 广东云耕数字技术有限公司 A kind of intelligent power supply power supply
WO2020029036A1 (en) * 2018-08-06 2020-02-13 深圳配天智能技术研究院有限公司 Switching power supply for electric vehicle and vehicle-mounted air conditioner compressor
CN109194115A (en) * 2018-08-29 2019-01-11 合肥德铭电子有限公司 Cavity mirror system electromagnetism suppressing device and cavity mirror system

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Application publication date: 20140723