CN206272337U - A kind of power supply circuit for 12V uninterrupted power sources - Google Patents
A kind of power supply circuit for 12V uninterrupted power sources Download PDFInfo
- Publication number
- CN206272337U CN206272337U CN201621398436.1U CN201621398436U CN206272337U CN 206272337 U CN206272337 U CN 206272337U CN 201621398436 U CN201621398436 U CN 201621398436U CN 206272337 U CN206272337 U CN 206272337U
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- circuit
- power supply
- power
- uninterrupted
- auxiliary
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Abstract
The utility model discloses a kind of power supply circuit for 12V uninterrupted power sources, it is characterised in that：Described power supply circuit includes that main circuit is in parallel with auxiliary circuit and accesses load circuit；Wherein main circuit connects bulk power grid, auxiliary circuit connection battery.Due to using above-mentioned structure, using bulk power grid as on the premise of main power supply, if there is chance failure power-off, battery auxiliary power supply can rapidly be switched to, maintain the uninterrupted power supply to supported chip, the degree of dependence for bulk power grid is reduced, the special power reguirements of part electronic equipment have been ensured.Additionally, the uninterrupted power supply circuit topological structure complexity of the 12V chip power supplies is low, easily realize, it is easy to operate, also cause that cost and control device are effectively guaranteed.
Description
Technical field
The utility model is related to the power supply field of electronic technology, more particularly to a kind of power supply for 12V uninterrupted power sources
Circuit.
Background technology
Today's society, the progress of science and technology drives Power Electronic Technique to continue to develop.With current electronic equipment increasingly
Precise treatment and rigorousization, many people start to be placed on the notice of research on power circuit, especially modern digital computer room, doctor
The reliability that power supply is powered, is all placed on very important position by high-tech instrument of institute etc..Accordingly, as electronic equipment heart
Power circuit more and more paid attention to.Traditional Switching Power Supply is generally by input rectifying wave filter, power switch pipe, defeated
Go out rectifier filter and the part of controller 4 composition, its effect is that input ac voltage is converted into VD supply to use
Family side uses.But the power supply to loading just inevitably, cannot be continued to when main power network occurs chance failure,
Cause many unnecessary losses, even human safety issues.
Regarding to the issue above, for electronic power technology, there is provided a kind of new power supply circuit, can be carried with safe and reliable
It is the problem that prior art needs to solve for uninterrupted power source.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of power supply circuit for 12V uninterrupted power sources, can
It is the problem that prior art needs to solve with safe and reliable offer uninterrupted power source.
To reach above-mentioned purpose, the technical solution of the utility model is that a kind of power supply for 12V uninterrupted power sources is electric
Road, it is characterised in that：Described power supply circuit includes that main circuit is in parallel with auxiliary circuit and accesses load circuit；Wherein main circuit connects
Connect bulk power grid, auxiliary circuit connection battery.
Described main circuit is the alternating current of 220V of being left behind from bulk power grid, first passes through EMI oscillographs and eliminates common mode and differential mode
Interference, then accesses the rectifier bridge that four Schottky diode is constituted, finally by around an integrated switch power core
The chip circuit of piece TOP265EG, and load circuit is electrically accessed by the stable DC that inverse-excitation type buck converter exports 12V.
The input of described auxiliary circuit is the DC constant voltage source provided by battery, the core being made up of LM46002
The direct current of piece circuit output 12V.
It is to be connected by a tenth diode D10 between described main circuit and auxiliary circuit, by the tenth diode
The pressure drop of D10 negative and positive pole tensions, makes the power supply of general complicated device circuit keep uninterrupted.
A kind of power supply circuit for 12V uninterrupted power sources, due to using above-mentioned structure, using bulk power grid as main
On the premise of power supply, if there is chance failure power-off, battery auxiliary power supply can be rapidly switched to, maintained to supported chip
Uninterrupted power supply, reduce the degree of dependence for bulk power grid, ensured the special power reguirements of part electronic equipment.This
Outward, the uninterrupted power supply circuit topological structure complexity of the 12V chip power supplies is low, easily realizes, easy to operate, also causes cost and control
Means processed are effectively guaranteed.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description；
Fig. 1 is a kind of structural representation of power supply circuit for 12V uninterrupted power sources of the utility model；
Fig. 2 is the structured flowchart of main circuit in a kind of power supply circuit for 12V uninterrupted power sources of the utility model；
Fig. 3 is the circuit diagram of main circuit in a kind of power supply circuit for 12V uninterrupted power sources of the utility model；
Fig. 4 is the structured flowchart of auxiliary circuit in a kind of power supply circuit for 12V uninterrupted power sources of the utility model；
Fig. 5 is the circuit diagram of auxiliary circuit in a kind of power supply circuit for 12V uninterrupted power sources of the utility model；
Fig. 6 is a kind of circuit diagram of power supply circuit for 12V uninterrupted power sources of the utility model；
In Fig. 1,2,4,1, main circuit；2nd, auxiliary circuit；3rd, load circuit；4th, bulk power grid；5th, battery；6th, EMI filters
Ripple device；7th, rectifier bridge；8th, main circuit chip circuit；9th, inverse-excitation type buck converter；10th, auxiliary circuit chip circuit.
Specific embodiment
The utility model includes that main circuit 1 is in parallel with auxiliary circuit 2 and accesses load circuit 3；Wherein main circuit 1 connects big electricity
Net 4, the connection battery 5 of auxiliary circuit 2.
Main circuit 1 is the alternating current of 220V of being left behind from bulk power grid, first passes through EMI oscillographs 6 and eliminates common mode and DM EMI,
Then the rectifier bridge 7 that four Schottky diode is constituted is accessed, finally by around an integrated switch power chip
The main circuit chip circuit 8 of TOP265EG, and be electrically accessed by the stable DC that inverse-excitation type buck converter 9 exports 12V negative
Carry circuit 3.The input of auxiliary circuit 2 is the DC constant voltage source provided by battery 5, the auxiliary electricity being made up of LM46002
Road chip circuit 10 exports the direct current of 12V.It is to be connected by a tenth diode D10 between main circuit 1 and auxiliary circuit 2
Connect, by the pressure drop of the tenth diode D10 negative and positive pole tensions, the power supply of general complicated device circuit is kept uninterrupted.
As shown in figure 1, the utility model is made up of upper and lower two parts, top half is to provide electric energy by bulk power grid 4, warp
By the control technology of main circuit 1, the direct current for exporting 12V supplies the chip load circuit 3 of 12V.The latter half is by battery 5
Electric energy is provided, via the control technology of auxiliary circuit 2,12V direct currents is exported, is exported by the tenth diode D10 and main circuit
Port connects, and coordinates main circuit 1 to power with auxiliary circuit 2, to reach the purpose of uninterrupted power supply.
As shown in Fig. 2 top half main circuit 1 of the present utility model mainly include electromagnetic interface filter 6, rectifier bridge 7,
Main circuit chip circuit 8, inverse-excitation type reduction voltage circuit 9 that TOP265EG is constituted.The 220V alternating currents that bulk power grid 4 is pulled down enter
Electromagnetic interface filter is filtered 6, eliminates common mode and DM EMI, then accesses the rectification that four Schottky diode is constituted
Bridge 7, then by a main circuit chip circuit 1 of integrated switch power chip TOP265EG, it is followed by a typical inverse-excitation type
Buck converter 9, the stable DC electricity of final output 12V.
As shown in figure 3, EMI filter circuit 6 includes order connected first order differential mode filter capacitor, common mode chokes successively
Circle, common mode filtering electric capacity and differential mode choke coil, first order differential mode filter capacitor are also connected with the output end of bulk power grid, differential mode chokes
The output end of circle is connected with the input of input filter rectifier bridge module.Rectifier bridge module uses simply low conduction loss
Schottky diode constitute bridge arm.The rectified half-waves of output are exported to the 9th filter capacitor C9, due to the work of capacitor filtering
With being effectively improved and suppress harmonic wave.TOP265EG chip circuits are to add it centered on one piece of integrated switching power source chip
Peripheral circuit, the function with high voltage startup, Cycle by Cycle electric current, restrictive cycle and loop compensation is reducing system cost
Meanwhile, also improve performance and the flexibility of power supply.Inverse-excitation type reduction voltage circuit, inverse-excitation type are connected by the first transformer T1 afterwards
The characteristics of be exactly circuit simple, component is few, and is well suited for the occasion of multi-output voltages and uses, according to the difference of the turn ratio, can
With the different DC voltage value for exporting.Vout1 and Vout2 in Fig. 3 are to give over to the chip powered to other different magnitudes of voltage
It is used, such as 5V and 3.3V.And the 12V direct currents exported after the tenth electric capacity C10 filtering are primarily upon here.
As shown in figure 4, the latter half auxiliary circuit 2 of the present utility model is mainly what is realized by LM46002 chip circuits.
The input of auxiliary circuit is the DC constant voltage source provided by battery, the typical case being made up of LM46002 synchronous bucks chip
The direct current of circuit output 12V.
As shown in figure 5, the auxiliary circuit chip circuit 10 of LM46002 only needs to little external component, connection is simple,
It is easy to use.It is depressured by way of PWM ripples, and carries and be integrated with synchronous rectification module.Using peak-current mode control
Make to realize simple ring road compensation and Cycle by Cycle current limit.On engineer applied, it is only necessary to the 4th inductance L4, the 19th electric capacity
The parameter of C19, the 17th resistance R17 and the 18th resistance R18 is calculated according to output requirement, can just obtain high precision, is imitated
Rate 12V outputs high.
As shown in fig. 6, this is uninterrupted power source particular circuit configurations.Including main circuit 1 and following auxiliary electricity above
2 two, road part.Main circuit is the alternating current of 220V of being left behind from bulk power grid 4, first passes through that EMI oscillographs 6 eliminate common mode and difference is touched
Interference, then accesses the rectifier bridge 7 that four Schottky diode is constituted, finally by around an integrated switch power core
Piece TOP265EG, builds typical inverse-excitation type buck converter 9, exports the stable DC electricity of 12V.It is defeated in auxiliary circuit 2
It is the DC constant voltage source provided by battery 5 to enter end, and the typical circuit being made up of LM46002 synchronous bucks chip exports 12V
Direct current.And connected by a tenth diode D10 between main circuit 1 and auxiliary circuit 2.Tenth diode D10's
Anode connects the output of main circuit, and negative electrode connects the output of accessory power supply.When 4 normal work of bulk power grid, the output of main circuit 1
12V direct currents directly feed the load of 12V chips and use, although the 12V direct currents that now accessory power supply can also be exported, due to the
The anode cathode of ten diode D10 is all 12V voltages, and pressure difference is not produced, therefore is not turned on, and the output of accessory power supply does not have
Used by chip load, only consume a little by LM46002 internal works.Can not continue to supply when bulk power grid 4 occurs chance failure
When electric, main circuit is the state for entering power-off, while the cathode voltage of the tenth diode D10 quickly falls to 0V, and it is positive
Pole remains 12V, due to generating pressure drop, the tenth diode D10 transient switchings so that the output of auxiliary circuit is filled out rapidly
The electric energy that bulk power grid can not be supplied is mended, the stability of 12V chip power supplies has been maintained, reached for 12V chip power supplies not
Interruptedly supplying power.
The utility model is exemplarily described above in conjunction with accompanying drawing, it is clear that the utility model is implemented not to be received
The limitation of aforesaid way, if the various improvement that technical solutions of the utility model are carried out are employed, or not improved direct application
In other occasions, within protection domain of the present utility model.
Claims (4)
1. a kind of power supply circuit for 12V uninterrupted power sources, it is characterised in that：Described power supply circuit includes main circuit (1)
Access load circuit (3) in parallel with auxiliary circuit (2)；Wherein main circuit (1) connects bulk power grid (4), and auxiliary circuit (2) connection stores
Battery (5).
2. a kind of power supply circuit for 12V uninterrupted power sources according to claim 1, it is characterised in that：Described master
Circuit (1) is the alternating current of 220V of being left behind from bulk power grid, first passes through EMI oscillographs (6) and eliminates common mode and DM EMI, Ran Houjie
Enter the rectifier bridge (7) that four Schottky diode is constituted, finally by around an integrated switch power chip
The main circuit chip circuit (8) of TOP265EG, and be electrically accessed by the stable DC that inverse-excitation type buck converter (9) exports 12V
To load circuit (3).
3. a kind of power supply circuit for 12V uninterrupted power sources according to claim 1, it is characterised in that：Described is auxiliary
The input for helping circuit (2) is the DC constant voltage source provided by battery (5), the auxiliary circuit chip being made up of LM46002
Circuit (10) exports the direct current of 12V.
4. a kind of power supply circuit for 12V uninterrupted power sources according to claim 1, it is characterised in that：Described master
It is to be connected by a tenth diode D10 between circuit (1) and auxiliary circuit (2), by the tenth diode D10 anode and cathodes electricity
The pressure drop of pressure, makes the power supply of general complicated device circuit keep uninterrupted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621398436.1U CN206272337U (en) | 2016-12-20 | 2016-12-20 | A kind of power supply circuit for 12V uninterrupted power sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621398436.1U CN206272337U (en) | 2016-12-20 | 2016-12-20 | A kind of power supply circuit for 12V uninterrupted power sources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206272337U true CN206272337U (en) | 2017-06-20 |
Family
ID=59045914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621398436.1U Expired - Fee Related CN206272337U (en) | 2016-12-20 | 2016-12-20 | A kind of power supply circuit for 12V uninterrupted power sources |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206272337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861444A (en) * | 2017-12-22 | 2018-03-30 | 江西江铃汽车集团改装车股份有限公司 | Integrated electrical system |
-
2016
- 2016-12-20 CN CN201621398436.1U patent/CN206272337U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861444A (en) * | 2017-12-22 | 2018-03-30 | 江西江铃汽车集团改装车股份有限公司 | Integrated electrical system |
| CN107861444B (en) * | 2017-12-22 | 2023-08-01 | 江西江铃汽车集团改装车股份有限公司 | Integrated electrical system |
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| 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: 20170620 Termination date: 20171220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |