CN203872072U - Multiple-output switching DC stabilized power supply with simple circuit - Google Patents
Multiple-output switching DC stabilized power supply with simple circuit Download PDFInfo
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- CN203872072U CN203872072U CN201420219023.7U CN201420219023U CN203872072U CN 203872072 U CN203872072 U CN 203872072U CN 201420219023 U CN201420219023 U CN 201420219023U CN 203872072 U CN203872072 U CN 203872072U
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Abstract
Provided is a multiple-output switching DC stabilized power supply with a simple circuit. The multiple-output switching DC stabilized power supply is composed of an EMI filter circuit, a rectification filter circuit, a high-frequency oscillation and voltage-stabilizing protection circuit, a +/-15V rectification filter circuit, a +5V rectification filter circuit, and an output voltage feedback circuit. The high-frequency oscillation and voltage-stabilizing protection circuit uses a single three-end switch power chip. The output voltage feedback circuit uses a three-end reference source and a photoelectric coupler. The multiple-output switching DC stabilized power supply may simultaneously output three groups of stabilized DC voltage including +15V, -15V, and +5V and has maximum current output of 1.5A, an over-current and overheating protection function, and beneficial effects of low quantity of elements, a simple circuit, low cost, small size, light weight, high efficiency, good voltage-stabilizing performance, and complete protection functions.
Description
Technical field
The utility model relates to D.C. regulated power supply technical field, is 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 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 utility model 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.The fields such as maintenance that can be widely used in power supply and the electronic product of teaching, scientific research, electronic product.
For achieving the above object, the utility model adopts following technical scheme: the utility model is comprised 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 utility model 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.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the utility model is comprised 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 comprised of capacitor C 1 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 is used for suppressing series mode interference signal, and L1 is used for suppressing common mode interference signal.
Current rectifying and wave filtering circuit is comprised of bridge rectifier BD1 and filter capacitor C2.Line voltage rectifying and wave-filtering to input, by the direct voltage of the 300V left and right obtaining, is 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, and capacitor C 3, C4, the armature winding N1 of diode D1 and switch transformer T1 forms.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, and filter capacitor C5, C6, C7, C8 and filter inductance L2, L3 form.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, and filter capacitor C9, C10 and filter inductance L4 form.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, and filter capacitor C11, current-limiting resistance R2, sample resistance R3, R4, three end a reference source TL431 and photoelectrical coupler PC871 form.The induced voltage rectifying and wave-filtering of the current rectifying and wave filtering circuit that D5, C11 form to N4 winding is the phototriode power supply in PC871 by the direct voltage obtaining.R3, R4 forms 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, when+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, after TOP225Y is subject to this to become large feedback voltage and control, 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 during balance, due to R3=R4, so be output as stable 5V direct voltage.
The switch DC stabilized voltage power supply of the utility model 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 utility model design, can simultaneously export ± 15V and+tri-groups of stable DC voltages of 5V are the power supply of digital circuit and amplifier, the fields such as maintenance that can be widely used in power supply and the electronic product of teaching, scientific research, electronic product, have wide market prospects.
Claims (6)
1. the simple multi-output switching D.C. regulated power supply of circuit, is characterized in that: it is comprised 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 comprised of capacitor C 1 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 of diode D1 and switch transformer T1 forms.
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 form.
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, and filter capacitor C9, C10 and filter inductance L4 form.
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 form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219023.7U CN203872072U (en) | 2014-05-02 | 2014-05-02 | Multiple-output switching DC stabilized power supply with simple circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219023.7U CN203872072U (en) | 2014-05-02 | 2014-05-02 | Multiple-output switching DC stabilized power supply with simple circuit |
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| CN203872072U true CN203872072U (en) | 2014-10-08 |
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| CN201420219023.7U Expired - Fee Related CN203872072U (en) | 2014-05-02 | 2014-05-02 | Multiple-output switching DC stabilized power supply with simple circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944416A (en) * | 2014-05-02 | 2014-07-23 | 张新安 | Multi-output switch direct current voltage stabilizing power source with simple circuit |
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2014
- 2014-05-02 CN CN201420219023.7U patent/CN203872072U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944416A (en) * | 2014-05-02 | 2014-07-23 | 张新安 | Multi-output switch direct current voltage stabilizing power source with simple circuit |
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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: 20141008 Termination date: 20150502 |
|
| EXPY | Termination of patent right or utility model |