CN205081684U - Turn over and swash power switching power supply that declines - Google Patents
Turn over and swash power switching power supply that declines Download PDFInfo
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- CN205081684U CN205081684U CN201520651862.0U CN201520651862U CN205081684U CN 205081684 U CN205081684 U CN 205081684U CN 201520651862 U CN201520651862 U CN 201520651862U CN 205081684 U CN205081684 U CN 205081684U
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Abstract
The utility model discloses a turn over and swash power switching power supply that declines, including the buffer protection circuit, the EMC circuit, a rectifying filter circuit, PWM becomes power transmission way, rectification output circuit and steady voltage feedback circuit, the buffer protection circuit, EMC circuit and rectification filter circuit change alternating current power supply into high level DC signal, high level DC signal becomes power transmission way through PWM, it exchanges pulse signal to change the low -voltage into, the low -voltage exchanges pulse signal and changes DC signal into through rectification output circuit, DC signal input steady voltage feedback circuit, and the signal transmission that opens / turn -off that will keep apart producing through the opto -coupler gives switching power supply control chip, rectification output circuit has two output port, the utility model discloses its topological structure adopts to turn over and swashs the formula, has saved impulse transformer's a power secondary, has the multiplexed output simultaneously, and is different with the design of traditional switching power supply.
Description
technical field:
The utility model relates to a kind of Switching Power Supply, particularly relates to a kind of inverse-excitation type micropower Switching Power Supply.
background technology:
The knowledge every aspect that the design of Switching Power Supply relates to, not only relates to analog and digital circuit, semiconductor element characteristic, electromagnetism knowledge, also needs to consider product heat radiation, safety requirements, electric compatible performance etc.Traditional design needs manually to have come, its complex steps, and workload is large, and efficiency is low.The peripheral components of conventional control circuit is many, and structure is lengthy and tedious, and a link goes wrong, and power supply just cannot normally work, and product reliability is poor.
utility model content:
Technical problem to be solved in the utility model is: overcome the deficiencies in the prior art, its topological structure adopts inverse-excitation type, eliminate a power supply secondary winding of pulse transformer, the design circuit of power supply is simplified more, there is the inverse-excitation type micropower Switching Power Supply of multiple-channel output simultaneously.
The technical solution of the utility model is: a kind of inverse-excitation type micropower Switching Power Supply, comprise buffer protection circuit, EMC circuit, current rectifying and wave filtering circuit, PWM transmission circuit, rectifying output circuit and voltage stabilizing feedback circuit, described buffer protection circuit, EMC circuit and current rectifying and wave filtering circuit change into high level direct current signal AC power, high level direct current signal is through PWM transmission circuit, change into low-voltage AC pulse signal, low-voltage AC pulse signal changes into direct current signal through rectifying output circuit, direct current signal input voltage stabilizing feedback circuit, and will be isolated the on/off Signal transmissions produced to Switching Power Supply control chip by optocoupler, described rectifying output circuit has two output ports.
Described buffer protection circuit comprises RQ1 and MOV1, and described RQ1 is auxiliary temperature coefficient of resistance, and model is MT72-10D7, and described MOV1 is piezo-resistance, and model is 14D471K.
Described EMC circuit comprises L1, C1, and described L1 is the annular common mode inductance of 5.6mH/1A, and described C1 is the X1 type safety electric capacity of 0.1uF/275V.
Described current rectifying and wave filtering circuit comprises DB1, L2-3, C2-3, described DB1 is GBP08 (2A, 800V) type rectifier bridge, L2-3 is 1mH/1A type drum inductance, and C2-3 is 6.8uF/450V type electrochemical capacitor, and voltage stabilizing feedback circuit comprises TL431, feedback optocoupler and peripheral circuit.
Described PWM transmission circuit comprises main control chip, pulse transformer and freewheeling circuit, described main control chip model is LNK364, the transformer that described pulse transformer is EE16 magnetic core, material is PC47, armature winding is 87 circles, and the number of turn of two secondary output end mouths is 6 circles and 14 circles.
Described freewheeling circuit comprises D1, R2 and C4, and described D1 is that supper-fast diode MUR160, R2 are 10K/1W resistance, C4 is 102/1kV high frequency porcelain chip capacitor.
Described rectifying output circuit comprises one-way commutation circuit and filtering output circuit, described filtering output circuit comprises L4, L5, C6, C7, C8, C9, described L4 and L5 is 6.8uH bar magnet inductance, and described C6 and C7 is 470uF/16V electrochemical capacitor, and described C8, C9 are 220uF/35V electrochemical capacitor.
The beneficial effects of the utility model are:
1, its topological structure of the utility model adopts inverse-excitation type, eliminates a power supply secondary winding of pulse transformer, the design circuit of power supply is simplified more, has multiple-channel output simultaneously, different from traditional switch Power Management Design.
2, the utility model is integrated with the power MOSFET of a 700V, novel ON/OFF state of a control machine, the high-voltage switch gear current source of an automatic biasing, frequency jitter, the current limit of Cycle by Cycle and sluggish Thermal shutdown circuit on a monolithic IC, only need a small amount of capacitance-resistance original paper of arranging in pairs or groups, can coordinate with pulse transformer all functions realizing basic switch power supply.
3, the utility model simplifies the drive circuit that prime PWM controls, main control chip inside have a 5.8V from voltage stabilizing circuit, power supply can be provided for chip, and the output of a 1mA is provided, power to feedback circuit, thus eliminate a power supply secondary winding of pulse transformer, the design circuit of power supply is simplified more.
4, the utility model reduces power supply cost, and use the power solution of monolithic, greatly reduce the device cost oneself building analog circuit, reduce power volume simultaneously, circuit board cost pressure is reduced greatly.
5, the utility model improves the reliability of power supply, a lot of such as simulation electronic component such as PWM generator, comparator is employed in traditional circuit, as long as there is an original paper abnormal, power supply just cannot normally work, by the thinking of integral control circuit, decrease the use of a lot of analogue device, greatly reduce the probability that device is damaged, improve the unfailing performance of product.
accompanying drawing illustrates:
Fig. 1 is the structural representation of inverse-excitation type micropower Switching Power Supply.
embodiment:
Embodiment: see Fig. 1.
Inverse-excitation type micropower Switching Power Supply, comprise buffer protection circuit, EMC circuit, current rectifying and wave filtering circuit, PWM transmission circuit, rectifying output circuit and voltage stabilizing feedback circuit, buffer protection circuit, EMC circuit and current rectifying and wave filtering circuit change into high level direct current signal AC power, high level direct current signal is through PWM transmission circuit, change into low-voltage AC pulse signal, low-voltage AC pulse signal changes into direct current signal through rectifying output circuit, direct current signal input voltage stabilizing feedback circuit, and will be isolated the on/off Signal transmissions produced to Switching Power Supply control chip by optocoupler, rectifying output circuit has two output ports.
Buffer protection circuit comprises RQ1 and MOV1, and RQ1 is auxiliary temperature coefficient of resistance, and model is MT72-10D7, MOV1 is piezo-resistance, and model is 14D471K.
EMC circuit comprises L1, C1, and L1 is the annular common mode inductance of 5.6mH/1A, and described C1 is the X1 type safety electric capacity of 0.1uF/275V.
Current rectifying and wave filtering circuit comprises DB1, L2-3, C2-3, DB1 is GBP08 (2A, 800V) type rectifier bridge, L2-3 is 1mH/1A type drum inductance, and C2-3 is 6.8uF/450V type electrochemical capacitor, and voltage stabilizing feedback circuit comprises TL431, feedback optocoupler and peripheral circuit.
PWM transmission circuit comprises main control chip, pulse transformer and freewheeling circuit, main control chip model is LNK364, the transformer that pulse transformer is EE16 magnetic core, material is PC47, armature winding is 87 circles, and the number of turn of two secondary output end mouths is 6 circles and 14 circles.
Freewheeling circuit comprises D1, R2 and C4, and D1 is that supper-fast diode MUR160, R2 are 10K/1W resistance, C4 is 102/1kV high frequency porcelain chip capacitor.
Rectifying output circuit comprises one-way commutation circuit and filtering output circuit, filtering output circuit comprises L4, L5, C6, C7, C8, C9, described L4 and L5 is 6.8uH bar magnet inductance, C6 and C7 is 470uF/16V electrochemical capacitor, and C8, C9 are 220uF/35V electrochemical capacitor.
In buffer protection circuit, RQ1 is mainly used in buffer switching power supply powered on moment capacitance charging current; electric capacity is played a protective role; differential mode interference when MOV1 prevents the situations such as thunderbolt from occurring; in time having differential mode high voltage to come in, itself and RQ1 form a resistance pressure-stabilizing circuit jointly by the filtering of differential mode high voltage signal.
EMC circuit improves the Electro Magnetic Compatibility of power supply, and wherein L1 and C1 is combined into a low-pass filter circuit, thus the attenuate external difference/impact of common mode high frequency interference on power source performance.
Main control chip (LNK364) inside of PWM transmission circuit comprises MOSFET and the controller thereof of a 700V, its high-voltage current source being connected internally to drain electrode startup stage bias current is provided, thus eliminate outside start-up circuit, inner integrated oscillator can provide the output pulse of 132kHz to MOSFET, main control chip constantly opens shutoff by controlling inner switching tube, the high-voltage dc signal that higher level exports is changed into the pulse signal of 132kHz, when switching tube is opened time, the electric current of the elementary interior flowing of pulse transformer increases, reach peak I p, when switching tube turns off time, flyback voltage makes output diode enter conducting state, it is secondary that the energy that simultaneously primary coil stores is that 1/2LI^2 is delivered to, load current is provided, charge to output capacitance simultaneously, the duty ratio of primary pulse can be regulated to regulate the size of Ip by voltage feedback circuit, thus play the effect of voltage stabilizing output, D1 simultaneously, R2 and C4 forms freewheeling circuit jointly, when preventing switching tube from turning off, primary produces high back voltage instantaneously and burns out switching tube.
If the one-way commutation main circuit of rectifying output circuit utilizes the one-way conduction ability of diode, when a blocking interval, secondary commutation diode current flow, by the magnetic energy release stored in iron core, then output circuit stable output direct voltage after filtering.
Voltage stabilizing feedback circuit, when output voltage reaches 5V time, U2 conducting, the MOSFET in U1 turns off, until the arrival of next switch periods, U2 selects PC817, R7=R9=10K, R6=150R, R8=1K, C=102.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. an inverse-excitation type micropower Switching Power Supply, comprise buffer protection circuit, EMC circuit, current rectifying and wave filtering circuit, PWM transmission circuit, rectifying output circuit and voltage stabilizing feedback circuit, it is characterized in that: described buffer protection circuit, EMC circuit and current rectifying and wave filtering circuit change into high level direct current signal AC power, high level direct current signal is through PWM transmission circuit, change into low-voltage AC pulse signal, low-voltage AC pulse signal changes into direct current signal through rectifying output circuit, direct current signal input voltage stabilizing feedback circuit, and will be isolated the on/off Signal transmissions produced to Switching Power Supply control chip by optocoupler, described rectifying output circuit has two output ports.
2. inverse-excitation type micropower Switching Power Supply according to claim 1; it is characterized in that: described buffer protection circuit comprises RQ1 and MOV1, described RQ1 is auxiliary temperature coefficient of resistance, and model is MT72-10D7; described MOV1 is piezo-resistance, and model is 14D471K.
3. inverse-excitation type micropower Switching Power Supply according to claim 1, is characterized in that: described EMC circuit comprises L1, C1, described L1 is the annular common mode inductance of 5.6mH/1A, and described C1 is the X1 type safety electric capacity of 0.1uF/275V.
4. inverse-excitation type micropower Switching Power Supply according to claim 1, it is characterized in that: described current rectifying and wave filtering circuit comprises DB1, L2-3, C2-3, described DB1 is GBP08 type rectifier bridge, L2-3 is 1mH/1A type drum inductance, C2-3 is 6.8uF/450V type electrochemical capacitor, and voltage stabilizing feedback circuit comprises TL431, feedback optocoupler and peripheral circuit.
5. inverse-excitation type micropower Switching Power Supply according to claim 1, it is characterized in that: described PWM transmission circuit comprises main control chip, pulse transformer and freewheeling circuit, described main control chip model is LNK364, the transformer that described pulse transformer is EE16 magnetic core, material is PC47, armature winding is 87 circles, and the number of turn of two secondary output end mouths is 6 circles and 14 circles.
6. inverse-excitation type micropower Switching Power Supply according to claim 5, is characterized in that: described freewheeling circuit comprises D1, R2 and C4, and described D1 is that supper-fast diode MUR160, R2 are 10K/1W resistance, C4 is 102/1kV high frequency porcelain chip capacitor.
7. inverse-excitation type micropower Switching Power Supply according to claim 1, it is characterized in that: described rectifying output circuit comprises one-way commutation circuit and filtering output circuit, described filtering output circuit comprises L4, L5, C6, C7, C8, C9, described L4 and L5 is 6.8uH bar magnet inductance, described C6 and C7 is 470uF/16V electrochemical capacitor, and described C8, C9 are 220uF/35V electrochemical capacitor.
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| CN201520651862.0U CN205081684U (en) | 2015-08-27 | 2015-08-27 | Turn over and swash power switching power supply that declines |
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| CN201520651862.0U CN205081684U (en) | 2015-08-27 | 2015-08-27 | Turn over and swash power switching power supply that declines |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680676A (en) * | 2016-03-18 | 2016-06-15 | 宁波三星医疗电气股份有限公司 | Switching power supply output circuit |
| CN105703639A (en) * | 2016-04-25 | 2016-06-22 | 崔艳群 | Power supply apparatus for green light source |
| CN105939119A (en) * | 2016-07-01 | 2016-09-14 | 温州市逸达科技有限公司 | Power supply circuit of electric sewing machine |
| CN109245568A (en) * | 2018-09-12 | 2019-01-18 | 杭州海兴电力科技股份有限公司 | A kind of exchange turns direct-current isolating switch power circuit |
| CN109388207A (en) * | 2018-10-31 | 2019-02-26 | 广东迅扬科技股份有限公司 | Water-cooled host computer |
-
2015
- 2015-08-27 CN CN201520651862.0U patent/CN205081684U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680676A (en) * | 2016-03-18 | 2016-06-15 | 宁波三星医疗电气股份有限公司 | Switching power supply output circuit |
| CN105703639A (en) * | 2016-04-25 | 2016-06-22 | 崔艳群 | Power supply apparatus for green light source |
| CN105939119A (en) * | 2016-07-01 | 2016-09-14 | 温州市逸达科技有限公司 | Power supply circuit of electric sewing machine |
| CN109245568A (en) * | 2018-09-12 | 2019-01-18 | 杭州海兴电力科技股份有限公司 | A kind of exchange turns direct-current isolating switch power circuit |
| CN109245568B (en) * | 2018-09-12 | 2024-05-24 | 杭州海兴电力科技股份有限公司 | Alternating current-to-direct current isolation switch power supply circuit |
| CN109388207A (en) * | 2018-10-31 | 2019-02-26 | 广东迅扬科技股份有限公司 | Water-cooled host computer |
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