CN207410223U - A kind of step-down type dc switching power supply - Google Patents
A kind of step-down type dc switching power supply Download PDFInfo
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- CN207410223U CN207410223U CN201721328635.XU CN201721328635U CN207410223U CN 207410223 U CN207410223 U CN 207410223U CN 201721328635 U CN201721328635 U CN 201721328635U CN 207410223 U CN207410223 U CN 207410223U
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- capacitance
- power supply
- resistance
- switching power
- voltage stabilizing
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 42
- 230000001360 synchronised effect Effects 0.000 claims abstract description 39
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 230000005669 field effect Effects 0.000 claims description 30
- 239000004065 semiconductor Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 150000004706 metal oxides Chemical class 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
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- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
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- 230000002459 sustained effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model discloses a kind of step-down type dc switching power supplies; including synchronous voltage stabilizing controller, DC voltage-stabilizing Switching Power Supply and overcurrent protective device, the DC voltage-stabilizing Switching Power Supply and the overcurrent protective device are connected respectively with the synchronous voltage stabilizing controller；The DC voltage-stabilizing Switching Power Supply includes DC power supply, the first capacitance, the second capacitance, first resistor and second resistance, the first resistor and second resistance series connection are voltage stabilizing branch, the DC power supply, first capacitance, second capacitance and the voltage stabilizing branch are connected in parallel with each other, and the node between the first resistor and the second resistance is connected with the synchronous voltage stabilizing controller.Step-down type dc switching power supply designed by the utility model has good application prospect.
Description
Technical field
The utility model belongs to power-supply device technical field, and in particular to a kind of step-down type dc switching power supply.
Background technology
The fields such as information age, agricultural, the energy, communications and transportation, communication are grown rapidly, and power industry are proposed more,
Higher requirement, it is such as energy saving, material is saved, loss of weight, environmental protection is safe, reliable etc..Existing equipment is especially big with volume, quality weight,
Output voltage is difficult to adjust or adjustable range is narrow, and voltage instability, power consumption is big, therefore this patent devises a step-down type dc
Switching power supply, this power efficient is energy saving, and output voltage adjustable extent is wide, small light weight, it can be achieved that transformation of electrical energy and
Power transfers, and has very big practical significance in field of power supplies.
The content of the invention
The utility model develops a kind of step-down type dc switching power supply, solves the technical issues of set forth above.
The technological means that the utility model uses is as follows：A kind of step-down type dc switching power supply, including synchronous voltage stabilizing
Controller, DC voltage-stabilizing Switching Power Supply and overcurrent protective device, the DC voltage-stabilizing Switching Power Supply and the overcurrent protective device
It is connected respectively with the synchronous voltage stabilizing controller；
The DC voltage-stabilizing Switching Power Supply includes DC power supply, the first capacitance, the second capacitance, first resistor and the second electricity
Resistance, the first resistor and second resistance series connection is voltage stabilizing branches, the DC power supply, first capacitance, described the
Two capacitances and the voltage stabilizing branch are connected in parallel with each other, the node between the first resistor and the second resistance with it is described same
Step voltage-stabilizing controller is connected；
The overcurrent protective device includes the first mos field effect transistor, the first metal oxidation
Object semiconductor field effect transistor one end is connected with the DC power anode, first metal oxide semiconductcor field effect
Answer in the middle part of the transistor other end and first mos field effect transistor tie point respectively with it is described synchronous
Voltage-stabilizing controller is connected.
Further, in the above-mentioned technical solutions, the second mos field effect transistor is further included, it is described
Second mos field effect transistor one end respectively with first metal oxide semiconductor field effect transistor
Pipe is connected with the synchronous voltage stabilizing controller, node and institute in the middle part of second mos field effect transistor
Synchronous voltage stabilizing controller is stated to be connected.
Further, in the above-mentioned technical solutions, the 6th resistance is further included, the 6th resistance both ends are respectively with described
Two mos field effect transistor are connected with the synchronous voltage stabilizing controller.
Further, in the above-mentioned technical solutions, constant-current voltage-stabilizing Switching Power Supply, the constant-current voltage-stabilizing Switching Power Supply are further included
Including constant-current source, the 3rd capacitance, the 4th capacitance, 3rd resistor, the 4th resistance, the 5th resistance and inductance, the 3rd resistor and
The 4th resistance series connection is the first constant current branch, and the 4th capacitance and the 5th resistance series connection are the second constant current branch,
The first constant current branch, the 3rd capacitance and the constant-current source are connected in parallel with each other.
Further, in the above-mentioned technical solutions, described inductance one end respectively with the synchronous voltage stabilizing controller and described
Second constant current branch is connected, the inductance other end respectively with the first constant current branch, the 3rd capacitance and the perseverance
Stream source is connected.
Further, in the above-mentioned technical solutions, circuit protection device is further included, the circuit protection device includes the 6th
Capacitance, the 5th capacitance and the 7th resistance, the 5th capacitance are connected with the 7th resistance as protection branch, the protection branch
Parallel with one another with the 6th capacitance, the circuit protection device is connected with the synchronous voltage stabilizing controller.
Further, in the above-mentioned technical solutions, discharger, the discharger and the synchronous voltage stabilizing control are further included
Device processed is connected, the discharger include fly-wheel diode, the 7th capacitance and the 8th capacitance, the fly-wheel diode with it is described
7th capacitance is connected in series, and the 8th capacitance is connected respectively with the fly-wheel diode and ground wire.
Further, in the above-mentioned technical solutions, the 7th capacitance, the 8th capacitance and the 8th resistance are further included, the described 7th
Capacitance, the 8th capacitance and the 8th resistance are connected respectively with the synchronous voltage stabilizing controller.
The beneficial effects of the utility model are：
(1) a kind of step-down type dc switching power supply of the utility model, seawater corrosion resistance, wind and wave resistance are destroyed, cost
Low, the service life is high；
(2) a kind of step-down type dc switching power supply of the utility model, low-carbon environment-friendly, generated energy is high, maintenance maintenance
It is convenient；
(3) a kind of step-down type dc switching power supply of the utility model, installs and deploys facility, suitable for all kinds of near
Sea, off-lying sea, island etc. need the occasion of electric power, versatile.
Description of the drawings
The utility model is described in further detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is the structure diagram of step-down type dc switching power supply described in the utility model；
Fig. 2 is the circuit diagram structure figure of step-down type dc switching power supply described in the utility model.
In figure：1st, DC voltage-stabilizing Switching Power Supply, 2, overcurrent protective device, 3, constant-current voltage-stabilizing Switching Power Supply, 4, circuit protection
Device, 5, discharger, 11, voltage stabilizing branch, M1, the first mos field effect transistor, M2, the second metal oxygen
Compound semiconductor field effect transistor, the 31, first constant current branch, the 32, second constant current branch, 41, protection branch, it is U1, synchronous steady
Pressure controller, Vin, DC power supply, Cin, the first capacitance, Cinx, the second capacitance, Cout, the 3rd capacitance, Cramp, the 4th electricity
Hold, Ccomp1, the 5th capacitance, Ccomp2, the 6th capacitance, Cres, the 7th capacitance, Css, the 8th capacitance, Ruv1, first resistor,
Ruv2, second resistance, Rfb1,3rd resistor, Rfb2, the 4th resistance, Rramp, the 5th resistance, Rsense, the 6th resistance,
Rcomp, the 7th resistance, Rt, the 8th resistance, lout, constant-current source, L1, inductance, D1, fly-wheel diode.
Specific embodiment
Clear, complete description is carried out to the technical solution of the utility model with reference to the accompanying drawings and examples, in this reality
With in new description, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ", " level ",
The orientation or position relationship of the instructions such as " interior ", " outer " are based on orientation shown in the drawings or position relationship, are for only for ease of and retouch
State the utility model and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
Embodiment 1
As shown in Figure 1 to Figure 2, a kind of step-down type dc switching power supply, including synchronous voltage stabilizing controller U1, direct current
Voltage-stabilizing switch power source 1 and overcurrent protective device 2, the DC voltage-stabilizing Switching Power Supply 1 and the overcurrent protective device 2 respectively with institute
Synchronous voltage stabilizing controller U1 is stated to be connected；
The DC voltage-stabilizing Switching Power Supply 1 includes DC power supply Vin, the first capacitance Cin, the second capacitance Cinx, the first electricity
It is voltage stabilizing branch 11 to hinder Ruv1 and second resistance Ruv2, the first resistor Ruv1 and the second resistance Ruv2 series connection, described
DC power supply Vin, the first capacitance Cin, the second capacitance Cinx and the voltage stabilizing branch 11 are connected in parallel with each other, institute
The node stated between first resistor Ruv1 and the second resistance Ruv2 is connected with the synchronous voltage stabilizing controller U1；
The overcurrent protective device 2 includes the first mos field effect transistor M1, first metal
Oxide semiconductor field effect transistor M1 one end is connected with the DC power supply Vin anodes, first metal oxide
The semiconductor field effect transistor M1 other ends and the first mos field effect transistor M1 middle parts tie point
It is connected respectively with the synchronous voltage stabilizing controller U1.
Further, in the above-mentioned technical solutions, the second mos field effect transistor M2, institute are further included
State second mos field effect transistor M2 one end respectively with first metal oxide semiconductor field-effect
Transistor M1 is connected with the synchronous voltage stabilizing controller U1, in the second mos field effect transistor M2
Portion's node is connected with the synchronous voltage stabilizing controller U1.
Further, in the above-mentioned technical solutions, the 6th resistance Rsense, the 6th resistance Rsense two are further included
End is connected respectively with the second mos field effect transistor M2 and the synchronous voltage stabilizing controller U1.
Further, in the above-mentioned technical solutions, constant-current voltage-stabilizing Switching Power Supply 3, the constant-current voltage-stabilizing switch electricity are further included
Source 3 includes constant-current source lout, the 3rd capacitance Cout, the 4th capacitance Cramp, 3rd resistor Rfb1, the 4th resistance Rfb2, the 5th electricity
Rramp and inductance L1, the 3rd resistor Rfb1 and the 4th resistance Rfb2 series connection are hindered for the first constant current branch 31, described the
Four capacitance Cramp and the 5th resistance Rramp series connection is the second constant current branch 32, the first constant current branch 31, described the
Three capacitance Cout and the constant-current source lout are connected in parallel with each other.
Further, in the above-mentioned technical solutions, described inductance L1 one end respectively with the synchronous voltage stabilizing controller U1 and
The second constant current branch 32 is connected, the inductance L1 other ends respectively with the first constant current branch 31, it is described 3rd electricity
Hold Cout with the constant-current source lout to be connected.
Further, in the above-mentioned technical solutions, circuit protection device 4 is further included, the circuit protection device 4 includes
6th capacitance Ccomp2, the 5th capacitance Ccomp1 and the 7th resistance Rcomp, the 5th capacitance Ccomp1 and the described 7th electricity
Rcomp series connection is hindered for protection branch 41, and the protection branch 41 and the 6th capacitance Ccomp2 are parallel with one another, and the circuit is protected
Protection unit 4 is connected with the synchronous voltage stabilizing controller U1.
Further, in the above-mentioned technical solutions, discharger 5, the discharger 5 and the synchronous voltage stabilizing are further included
Controller U1 is connected, and the discharger 5 includes sustained diode 1, the 7th capacitance Cres and the 8th capacitance Css, described
Sustained diode 1 is connected in series with the 7th capacitance Cres, the 8th capacitance Css respectively with the sustained diode 1
It is connected with ground wire.
Further, in the above-mentioned technical solutions, the 7th capacitance Cres, the 8th capacitance Css and the 8th resistance Rt are further included,
The 7th capacitance Cres, the 8th capacitance Css and the 8th resistance Rt respectively with the synchronous voltage stabilizing controller U1 phases
Connection.
The step-down type dc voltage-stabilizing switch power source 1 of the utility model is mainly by LN5117PMHE/NOPB synchronous bucks
Controller chip and CSD18532KCSMOS power metal oxide semiconductor field-effect transistors (MOSFET) are formed.As schemed
Show, when specified input direct voltage is 12V, rated output DC voltage is 5V, and output-current rating maximum is 3.2A, is born
It is 2% to carry regulation, voltage regulation factor 0.4%, efficiency 90.8%.
This patent includes synchronous buck controller, DC voltage-stabilizing Switching Power Supply 1, current foldback circuit.Utilize LM5117
The synchronous buck controller of design is based on the Controlled in Current Mode and Based using simulated current slope, before having intrinsic input voltage
Feedback, Cycle by Cycle current limit and the function of simplifying loop compensation can realize that high input voltage applies necessary minimum duty
The reliable control of ratio.DC voltage-stabilizing Switching Power Supply 1 have it is energy-efficient, adapt to that alternating current changing capability is strong, output voltage is adjustable model
Enclose function that is wide, can easily obtaining the different power supply of multigroup voltage class.There is the current foldback circuit recovered, work as electricity
It when electric current is excessive in road, can cut off the power in time, be effectively prevented from burning out for entire circuit, after troubleshooting, circuit can be certainly
It is dynamic to recover normal work.Influence of the ripple to power supply has been additionally contemplates that in the design process of power supply, filter is made using filter capacitor
The voltage exported after ripple is steady dc voltage.
This patent is suitable for the operating voltage range of 5.5V to 65V and the operating frequency range of 50KHZ to 750KHZ, at present
The Major research field of power electronics has been placed on large capacity high frequency switch power by countries in the world, set by the utility model
The step-down type dc switching power supply of meter has good application prospect.
The above is only the preferable specific implementation method of the utility model, but the scope of protection of the utility model is not
This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, according to this practicality
New technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (8)
1. a kind of step-down type dc switching power supply, it is characterised in that：Including synchronous voltage stabilizing controller, DC voltage-stabilizing switch electricity
Source and overcurrent protective device, the DC voltage-stabilizing Switching Power Supply and the overcurrent protective device control respectively with the synchronous voltage stabilizing
Device is connected；
The DC voltage-stabilizing Switching Power Supply includes DC power supply, the first capacitance, the second capacitance, first resistor and second resistance, institute
It states first resistor and the second resistance is connected as voltage stabilizing branch, the DC power supply, first capacitance, second capacitance
It is connected in parallel with each other with the voltage stabilizing branch, the node between the first resistor and the second resistance and the synchronous voltage stabilizing
Controller is connected；
The overcurrent protective device includes the first mos field effect transistor, first metal oxide half
Conductor field-effect transistor one end is connected with the DC power anode, and first metal oxide semiconductor field-effect is brilliant
In the middle part of the body pipe other end and first mos field effect transistor tie point respectively with the synchronous voltage stabilizing
Controller is connected.
2. step-down type dc switching power supply according to claim 1, it is characterised in that：Further include the oxidation of the second metal
Object semiconductor field effect transistor, described second mos field effect transistor one end respectively with first gold medal
Belong to oxide semiconductor field effect transistor with the synchronous voltage stabilizing controller to be connected, second metal-oxide semiconductor (MOS)
Node is connected with the synchronous voltage stabilizing controller in the middle part of field-effect transistor.
3. step-down type dc switching power supply according to claim 2, it is characterised in that：Further include the 6th resistance, institute
State the 6th resistance both ends respectively with second mos field effect transistor and the synchronous voltage stabilizing controller
It is connected.
4. step-down type dc switching power supply according to claim 1, it is characterised in that：Further include constant-current voltage-stabilizing switch
Power supply, the constant-current voltage-stabilizing Switching Power Supply include constant-current source, the 3rd capacitance, the 4th capacitance, 3rd resistor, the 4th resistance, the 5th
Resistance and inductance, the 3rd resistor and the 4th resistance series connection is the first constant current branches, the 4th capacitance and described the
Five resistance are connected as the second constant current branch, the first constant current branch, the 3rd capacitance and constant-current source company parallel with one another
It connects.
5. step-down type dc switching power supply according to claim 4, it is characterised in that：Described inductance one end respectively with
The synchronous voltage stabilizing controller is connected with the second constant current branch, the inductance other end respectively with the first constant current branch
Road, the 3rd capacitance are connected with the constant-current source.
6. step-down type dc switching power supply according to claim 1, it is characterised in that：Further include circuit protection dress
It puts, the circuit protection device includes the 6th capacitance, the 5th capacitance and the 7th resistance, the 5th capacitance and the 7th resistance
Connect for protect branch, it is described protection branch and the 6th capacitance it is parallel with one another, the circuit protection device with it is described synchronous
Voltage-stabilizing controller is connected.
7. step-down type dc switching power supply according to claim 1, it is characterised in that：Discharger is further included, institute
It states discharger with the synchronous voltage stabilizing controller to be connected, the discharger includes fly-wheel diode, the 7th capacitance and the
Eight capacitances, the fly-wheel diode are connected in series with the 7th capacitance, the 8th capacitance respectively with the fly-wheel diode
It is connected with ground wire.
8. step-down type dc switching power supply according to claim 1, it is characterised in that：Further include the 7th capacitance,
Eight capacitances and the 8th resistance, the 7th capacitance, the 8th capacitance and the 8th resistance respectively with the synchronous voltage stabilizing control
Device processed is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328635.XU CN207410223U (en) | 2017-10-16 | 2017-10-16 | A kind of step-down type dc switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328635.XU CN207410223U (en) | 2017-10-16 | 2017-10-16 | A kind of step-down type dc switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207410223U true CN207410223U (en) | 2018-05-25 |
Family
ID=62319875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721328635.XU Expired - Fee Related CN207410223U (en) | 2017-10-16 | 2017-10-16 | A kind of step-down type dc switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207410223U (en) |
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2017
- 2017-10-16 CN CN201721328635.XU patent/CN207410223U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180525 Termination date: 20181016 |