CN205544985U - 5V changes 12V voltage conversion circuit - Google Patents
5V changes 12V voltage conversion circuit Download PDFInfo
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- CN205544985U CN205544985U CN201620140187.XU CN201620140187U CN205544985U CN 205544985 U CN205544985 U CN 205544985U CN 201620140187 U CN201620140187 U CN 201620140187U CN 205544985 U CN205544985 U CN 205544985U
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Abstract
The utility model discloses a 5V changes 12V voltage conversion circuit, include: 5V power input connector, voltage conversion circuit, 12V power output interface, voltage conversion circuit includes: adopt the rectifier circuit of bridge rectifier, the direct current that uses the power device of the accuse type full IGBT chopper circuit that steps up, produce the PWM signal for the control circuit of the break -make of the main power device among the control direct current chopper circuit, overvoltage crowbar to the overvoltage protection among over -current protection and the opening and closing process. The utility model has the advantages of being simple in structure and convenient in operation, rectifier circuit can effective filtering power clutter, obtains stable input voltage, the direct current step up chopper circuit can be effectual will be reliable with voltage build -up to required numerical value, the control circuit signal is stable, output current that safe and reliable, protection circuit can effective protection circuits, voltage are no longer than the settlement scope.
Description
Technical field
This utility model relates to power supply changeover device field, particularly relates to a kind of 5V and turns 12V voltage conversion circuit.
Background technology
Along with developing rapidly of electron electric power technology, power equipment is extensive in many sector applications, all of power equipment is required for stable supply of electric power, in prior art, photovoltaic conversion equipment be generally a certain have buck or boost chip process, although this is capable of the purpose of buck or boost, but, generally there is following deficiency: one is boosting or blood pressure lowering horizontal instability, as relatively low in the cheap of fruit chip or technology water product, the amplitude range of its output voltage may be bigger, is unfavorable for the use of electrical equipment；Two is that spoilage is higher, if having input voltage or electric current instability, integrated chip easily burns out, and causes the damage of equipment；Three is circuit protection scarce capacity.
Therefore, the technical problem that those skilled in the art are in the urgent need to address is exactly: a kind of proposition one method how to innovate, using the teaching of the invention it is possible to provide safe, stable, simple voltage conversion circuit, reaches the long-time reliable purpose used.
Utility model content
The purpose of this utility model is to provide a kind of 5V to turn 12V voltage conversion circuit, with the problem solving to propose in above-mentioned background technology.
For solving the problems referred to above, the utility model discloses a kind of 5V and turn 12V voltage conversion circuit, including: 5V power input interface, voltage conversion circuit, 12V power output interface, described voltage conversion circuit includes the rectification circuit using bridge rectifier；Use full-control type power device IGBT(igbt) DC boosting chopper circuit；Produce pwm signal, for controlling the control circuit of the break-make of the main power device in DC chopper circuit；Protection circuit to the overvoltage protection in overcurrent protection and switching process.
Preferably, described rectification circuit uses four diode one full bridge rectifiers of composition, and an inductance of connecting becomes low pass filter.
Preferably, described control circuit uses UG3525 chip to produce PWM chopping signal.
Preferably, described DC boosting chopper circuit includes an IGBT, electric capacity, resistance, a diode, and the grid of described IGBT connects the PWM chopping signal of UG3525 output.
Compared with prior art, this utility model has the advantage that
This utility model simple in construction, easy to operate; rectification circuit can effectively filter out power supply clutter; obtain stable voltage; voltage effectively can will be risen to required numerical value by DC boosting chopper circuit reliably; control circuit signal stabilization; safe and reliable, protection circuit effectively the output electric current of protection circuit, voltage can be less than set point.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, introduce the accompanying drawing used in embodiment or description of the prior art is done one simply below.
Fig. 1 is the structural representation that a kind of 5V of the present utility model turns 12V voltage conversion circuit.
Fig. 2 is rectification circuit circuit diagram of the present utility model.
Fig. 3 is DC boosting chopper circuit circuit diagram of the present utility model.
Fig. 4 is control circuit circuit diagram of the present utility model.
Fig. 5 is protection circuit circuit diagram of the present utility model.
In figure: 1,5V power input interface；2, voltage conversion circuit；21, rectification circuit；22, DC boosting chopper circuit；23, control circuit；24, protection circuit；3,12V power output interface.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
A kind of 5V that this utility model provides as shown in Figure 1 turns 12V voltage conversion circuit, and including 5V power input interface 1, voltage conversion circuit 2,12V power output interface 3, described voltage conversion circuit includes the rectification circuit 21 using bridge rectifier；Use full-control type power device IGBT(igbt) DC boosting chopper circuit 22；Produce pwm signal, for controlling the control circuit 23 of the break-make of the main power device in DC chopper circuit；Protection circuit 24 to the overvoltage protection in overcurrent protection and switching process.
As in figure 2 it is shown, rectification circuit 21 uses four diode one full bridge rectifiers of composition, and an inductance of connecting becomes low pass filter.Owing to rectification circuit voltage out contains bigger ripple, quality of voltage is not very good, therefore one inductance of series connection becomes low pass filter, filters the higher hamonic wave of electric current, and electric capacity in parallel can filter the higher hamonic wave of voltage, thus reduce ripple.By inductance, the electrical characteristic of electric capacity, more satisfactory DC voltage can be obtained.
As it is shown on figure 3, described DC boosting chopper circuit 22 includes an IGBT, electric capacity, resistance, a diode, the grid of described IGBT connects the PWM chopping signal of UG3525 output.DC boosting chopper circuit 22 is the core of this Circuits System, the selection of copped wave device can bear big voltage and conducting internal resistance is little, switching frequency, the high-power IGBT pipe that switch time is little, connect on the left of circuit rectified after 5V voltage, right side exports for chopping voltage, and IGBT grid connects the PWM chopping signal of SG3525 output.
As shown in Figure 4; described control circuit 23 needs the function realized to be to produce pwm signal; for controlling the break-make of main power device in copped wave booster circuit; by regulation dutycycle; reaching to control the purpose of output voltage size, this circuit uses the special chip UC3525 directly producing PWM, this chip internal integrated protective circuit; improve the safety of Circuits System, there is capacity of resisting disturbance.
As shown in Figure 5; described protection circuit 24 is the protection of IGBT; it is primarily directed to overcurrent protection and overvoltage protection; overcurrent protection is mainly by a variable resistance of connecting in main circuit; at its two ends parallel connection electromagnetic relay coil; when the electric current of main circuit is higher than certain numerical value, the switch Guan Bi of electromagnetic relay, connect low level；Excess voltage protection principle is as circuit overcurrent protection.
Above a kind of 5V provided by the utility model is turned 12V voltage conversion circuit to be described in detail, principle of the present utility model and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for one of ordinary skill in the art, according to thought of the present utility model, the most all will change, in sum, this specification content should not be construed as restriction of the present utility model.
Last it is noted that the foregoing is only preferred embodiment of the present utility model; it is not limited to this utility model; although this utility model being described in detail with reference to previous embodiment; for a person skilled in the art; technical scheme described in foregoing embodiments still can be modified by it; or wherein portion of techniques feature is carried out equivalent; all within spirit of the present utility model and principle; the any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (4)
1. a 5V turns 12V voltage conversion circuit, it is characterised in that including: 5V power input interface, voltage conversion circuit, 12V power output interface, and described voltage conversion circuit includes:
Use the rectification circuit of bridge rectifier；
Use full-control type power device IGBT(igbt) DC boosting chopper circuit；
Produce pwm signal, for controlling the control circuit of the break-make of the main power device in DC chopper circuit；
Overvoltage crowbar to the overvoltage protection in overcurrent protection and switching process.
5V the most according to claim 1 turns 12V voltage conversion circuit, it is characterised in that described rectification circuit uses four diode one full bridge rectifiers of composition, and an inductance of connecting becomes low pass filter.
5V the most according to claim 1 turns 12V voltage conversion circuit, it is characterised in that described control circuit uses UG3525 chip to produce PWM chopping signal.
4. turn 12V voltage conversion circuit according to the 5V described in claim 1 or 3, it is characterized in that, described DC boosting chopper circuit includes an IGBT, electric capacity, resistance, a diode, and the grid of described IGBT connects the PWM chopping signal of UG3525 output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620140187.XU CN205544985U (en) | 2016-02-25 | 2016-02-25 | 5V changes 12V voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620140187.XU CN205544985U (en) | 2016-02-25 | 2016-02-25 | 5V changes 12V voltage conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544985U true CN205544985U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620140187.XU Expired - Fee Related CN205544985U (en) | 2016-02-25 | 2016-02-25 | 5V changes 12V voltage conversion circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205544985U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206517A (en) * | 2018-03-08 | 2018-06-26 | 广州金升阳科技有限公司 | A kind of low cost inputs anti-overvoltage crowbar |
-
2016
- 2016-02-25 CN CN201620140187.XU patent/CN205544985U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206517A (en) * | 2018-03-08 | 2018-06-26 | 广州金升阳科技有限公司 | A kind of low cost inputs anti-overvoltage crowbar |
| WO2019169904A1 (en) * | 2018-03-08 | 2019-09-12 | 广州金升阳科技有限公司 | Low-cost input anti-overvoltage protection circuit |
| CN108206517B (en) * | 2018-03-08 | 2020-05-19 | 广州金升阳科技有限公司 | Low-cost input overvoltage-resistant protection 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: 20160831 Termination date: 20180225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |