CN209001854U - A kind of Switching Power Supply with pulse width modulation chip - Google Patents
A kind of Switching Power Supply with pulse width modulation chip Download PDFInfo
- Publication number
- CN209001854U CN209001854U CN201821612593.7U CN201821612593U CN209001854U CN 209001854 U CN209001854 U CN 209001854U CN 201821612593 U CN201821612593 U CN 201821612593U CN 209001854 U CN209001854 U CN 209001854U
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- CN
- China
- Prior art keywords
- power supply
- lightning protection
- pulse width
- width modulation
- switching power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of Switching Power Supplies with pulse width modulation chip, including lightning protection for power supply, one end of the lightning protection for power supply is provided with electromagnetic interface filter, one end of the electromagnetic interface filter is provided with rectifier diode, one end of the rectifier diode is provided with power converter, and one end of the power converter is provided with output end.A kind of Switching Power Supply with pulse width modulation chip described in the utility model, the surge voltage of lightning stroke can be absorbed, protect subsequent circuit, circuit is simple, price is relatively cheap, it is disconnected in time when can break down, DM EMI can be filtered out, it can also inhibit common-mode signal, can electromagnetic noise to power supply and noise signal inhibit, it prevents to power supply disturbance, the high frequency spurs that power supply itself generates are also prevented from simultaneously to interfere power grid, surge current can effectively be prevented, the energy of consumption is very small, this Switching Power Supply will bring better prospect of the application.
Description
Technical field
The utility model relates to field of switch power, in particular to a kind of switch electricity with pulse width modulation chip
Source.
Background technique
Switching Power Supply is the time ratio that control switch pipe turns on and off using modern power electronics technology, remains steady
Determine a kind of power supply of output voltage, Switching Power Supply is generally made of pulse width modulation (PWM) control IC and MOSFET.With electricity
The development and innovation of power electronic technology, so that switch power technology is also innovated constantly.Currently, Switching Power Supply is with small-sized, light
Amount and efficient feature are widely used almost all of electronic equipment, are that current electronics and information industry rapid development is indispensable
A kind of few power mode, traditional Switching Power Supply with pulse width modulation chip has disadvantages that, firstly, being struck by lightning
Or after long-time aging, varistor voltage class can be reduced, it is possible to be lower than network voltage, be caused its power consumption to become larger even short
Road, secondly, being easy to produce stronger electromagnetic interference (EMI) signal.Its EMI signal not only has very wide frequency range, also
With certain amplitude, electromagnetic environment can be polluted by being conducted and being radiated, to solve the above problems, having arteries and veins we have proposed this
Rush the Switching Power Supply of width modulated chip.
Utility model content
The main purpose of the utility model is to provide a kind of Switching Power Supply with pulse width modulation chip, Ke Yiyou
Effect solves the problems in background technique.
To achieve the above object, the technical solution that the utility model is taken are as follows:
A kind of Switching Power Supply with pulse width modulation chip, including lightning protection for power supply, the one of the lightning protection for power supply
End is provided with electromagnetic interface filter, and one end of the electromagnetic interface filter is provided with rectifier diode, and one end of the rectifier diode is set
It is equipped with power converter, one end of the power converter is provided with output interface.
Preferably, the lightning protection for power supply includes lightning protection unit, and the lightning protection unit includes varistor MOV1, pressure-sensitive electricity
Hinder MOV2, varistor MOV3, fuse F2, fuse F3, gas-discharge tube FDG, the varistor MOV1 and pressure-sensitive electricity
MOV2 series connection is hindered, the varistor MOV3 is in parallel with varistor MOV1, varistor MOV2, the output of the fuse F2
The input port of port and lightning protection for power supply is electrically connected, and the lightning protection for power supply is internally provided with fuse F1.
Preferably, the electromagnetic interface filter includes EMI circuit, and the rectifier diode includes transformation electric current, the transformation electricity
Stream includes capacitor, common mode inductance, and the quantity of the capacitor is two groups, and the common mode inductance is in parallel with capacitor.
Preferably, the power converter includes power conversion, and the output interface includes conveying electric current, and the power supply is anti-
It is connected between thunder device and electromagnetic interface filter by electric signal, the output interface is connect with external electric appliance.
Preferably, the output port of the input port of the rectifier diode and electromagnetic interface filter is electrically connected, the power
The input port of converter and the output port of rectifier diode are electrically connected, and the power converter acts on output interface.
Preferably, the outer surface of the electromagnetic interface filter is coated with erosion shield, and the output end electrically connects with external electric appliance
It connects, the lightning protection for power supply is internally provided with RT1 resistance, and RT1 resistance and lightning protection for power supply are electrically connected.
Compared with prior art, the utility model has the following beneficial effects: this has opening for pulse width modulation chip
The surge voltage of lightning stroke can be absorbed by varistor MOV1, varistor MOV2, varistor MOV3 for powered-down source, protection
Subsequent circuit, in addition circuit is simple, and price is relatively cheap, and by taking a policy, F2 and fuse F3 can protect circuit,
It is disconnected in time in varistor MOV1, varistor MOV2, varistor MOV3 when breaking down, it may have the effect of lightning protection
Fruit, can filter out DM EMI by capacitor, can inhibit common-mode signal by common mode inductance, can be right by electromagnetic interface filter
The electromagnetic noise and noise signal of power supply are inhibited, and the high frequency generated is prevented to power supply disturbance, while being also prevented from power supply itself
Clutter interferes power grid, be to capacitor charging, since immediate current is big, just by varistor MOV1 when electric power starting moment
Surge current can be effectively prevented, because instantaneous energy totally disappeared consumption on RT1 resistance, RT1 hinders after temperature increases after a certain period of time
The energy that value reduces at this moment its consumption is very small, and late-class circuit can work normally, and the effect used is more preferable relative to traditional approach.
Detailed description of the invention
Fig. 1 is a kind of flowage structure schematic diagram for the Switching Power Supply that chip is modulated with pulse width of the utility model；
Fig. 2 is a kind of circuit diagram of the lightning protection unit for the Switching Power Supply that chip is modulated with pulse width of the utility model；
Fig. 3 is a kind of schematic diagram of the EMI circuit for the Switching Power Supply that chip is modulated with pulse width of the utility model；
Fig. 4 is a kind of transformation current diagram for the Switching Power Supply that chip is modulated with pulse width of the utility model.
In figure: 1, lightning protection for power supply；2, electromagnetic interface filter；3, rectifier diode；4, power converter；5, output interface；6,
Lightning protection unit；7, EMI circuit；8, change electric current；9, power conversion；10, electric current is conveyed；11, varistor MOV1；12, pressure-sensitive
Resistance MOV2；13, varistor MOV3；14, fuse F2；15, fuse F3；16, gas-discharge tube FDG；17, capacitor；18,
Common mode inductance.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
As shown in Figs 1-4, a kind of Switching Power Supply with pulse width modulation chip, including lightning protection for power supply 1, power supply are anti-
One end of thunder device 1 is provided with electromagnetic interface filter 2, and one end of electromagnetic interface filter 2 is provided with rectifier diode 3, and the one of rectifier diode 3
End is provided with power converter 4, and one end of power converter 4 is provided with output interface 5.
Lightning protection for power supply 1 includes lightning protection unit 6, and the surge voltage of lightning stroke can be absorbed by lightning protection for power supply 1.Lightning protection list
Member 6 includes varistor MOV111, varistor MOV212, varistor MOV313, fuse F214, fuse F315, gas
Body discharge tube FDG16, varistor MOV111 connect with varistor MOV212, varistor MOV313 and varistor
MOV111, varistor MOV212 are in parallel, and the output port of fuse F214 electrically connects with the input port of lightning protection for power supply 1
It connects, the lightning protection for power supply 1 is internally provided with fuse F1, can protect circuit by fuse F1；Electromagnetic interface filter 2 wraps
EMI circuit 7 is included, rectifier diode 3 includes transformation electric current 8, and transformation electric current 8 includes capacitor 17, common mode inductance 18, the number of capacitor 17
Amount is two groups, and common mode inductance 18 is in parallel with capacitor 17；Power converter 4 includes power conversion 9, and output interface 5 includes conveying electricity
Stream 10 is connected between lightning protection for power supply 1 and electromagnetic interface filter 2 by electric signal, and output interface 5 is connect with external electric appliance；Rectification two
The input port of pole pipe 3 and the output port of electromagnetic interface filter 2 are electrically connected, two poles of input port and rectification of power converter 4
The output port of pipe 3 is electrically connected, and power converter 4 acts on output interface 5；The outer surface of electromagnetic interface filter 2 is coated with anticorrosion
Coating, output end 5 and external electric appliance are electrically connected, and the lightning protection for power supply lightning protection for power supply (1) is internally provided with RT1 electricity
Resistance, RT1 resistance and lightning protection for power supply 1 are electrically connected.
It should be noted that the utility model is a kind of Switching Power Supply for modulating chip with pulse width, pass through power supply
Lightning protection device 1(model are as follows: OBO-V20) internal varistor MOV111, varistor MOV212, varistor MOV313 can be with
The surge voltage for absorbing lightning stroke can protect circuit by fuse F214 and fuse F315, be inhibited by common mode inductance 18
Common-mode signal when electric current passes through electromagnetic interface filter 2, eliminates electromagnetic noise by the EMI circuit 7 in EMI circuit 7, then by whole
Flow diode 3(model are as follows: IN4007) in EMI circuit 7 by AC conversion be direct current, then pass through power converter 4(type
Number are as follows: PT1102) electric current suitable for equipment is converted the current into, it is used by 5 charger of output end, is surpassed on prospect of the application
Traditional Switching Power Supply has been got over, it is more practical.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (6)
1. a kind of Switching Power Supply with pulse width modulation chip, including lightning protection for power supply (1), it is characterised in that: the electricity
One end of source lightning protection device (1) is provided with electromagnetic interface filter (2), and one end of the electromagnetic interface filter (2) is provided with rectifier diode
(3), one end of the rectifier diode (3) is provided with power converter (4), and one end of the power converter (4) is provided with
Output interface (5).
2. a kind of Switching Power Supply with pulse width modulation chip according to claim 1, it is characterised in that: the electricity
Source lightning protection device (1) includes lightning protection unit (6), and the lightning protection unit (6) includes varistor MOV1(11), varistor MOV2
(12), varistor MOV3(13), fuse F2(14), fuse F3(15), gas-discharge tube FDG(16), the pressure-sensitive electricity
Resistance MOV1(11) connect with varistor MOV2(12), the varistor MOV3(13) with varistor MOV1(11), pressure-sensitive
Resistance MOV2(12) in parallel, the fuse F2(14) output port and the input port of lightning protection for power supply (1) be electrically connected,
The lightning protection for power supply (1) is internally provided with fuse F1.
3. a kind of Switching Power Supply with pulse width modulation chip according to claim 1, it is characterised in that: described
Electromagnetic interface filter (2) includes EMI circuit (7), and the rectifier diode (3) includes transformation electric current (8), transformation electric current (8) packet
Capacitor (17), common mode inductance (18) are included, the quantity of the capacitor (17) is two groups, and the common mode inductance (18) and capacitor (17) are simultaneously
Connection.
4. a kind of Switching Power Supply with pulse width modulation chip according to claim 1, it is characterised in that: the function
Rate converter (4) includes power conversion (9), and the output interface (5) includes conveying electric current (10), the lightning protection for power supply (1)
It is connect between electromagnetic interface filter (2) by electric signal, the output interface (5) connect with external electric appliance.
5. a kind of Switching Power Supply with pulse width modulation chip according to claim 1, it is characterised in that: described whole
The output port of the input port and electromagnetic interface filter (2) that flow diode (3) is electrically connected, the input of the power converter (4)
The output port of port and rectifier diode (3) is electrically connected, and the power converter (4) acts on output interface (5).
6. a kind of Switching Power Supply with pulse width modulation chip according to claim 1, it is characterised in that: described
The outer surface of electromagnetic interface filter (2) is coated with erosion shield, and the output interface (5) and external electric appliance are electrically connected, the power supply
Lightning protection device (1) is internally provided with RT1 resistance, and RT1 resistance and lightning protection for power supply (1) are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821612593.7U CN209001854U (en) | 2018-09-30 | 2018-09-30 | A kind of Switching Power Supply with pulse width modulation chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821612593.7U CN209001854U (en) | 2018-09-30 | 2018-09-30 | A kind of Switching Power Supply with pulse width modulation chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209001854U true CN209001854U (en) | 2019-06-18 |
Family
ID=66803218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821612593.7U Expired - Fee Related CN209001854U (en) | 2018-09-30 | 2018-09-30 | A kind of Switching Power Supply with pulse width modulation chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209001854U (en) |
-
2018
- 2018-09-30 CN CN201821612593.7U patent/CN209001854U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190618 Termination date: 20210930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |