CN205725454U - A kind of DC DC booster - Google Patents
A kind of DC DC booster Download PDFInfo
- Publication number
- CN205725454U CN205725454U CN201620315593.5U CN201620315593U CN205725454U CN 205725454 U CN205725454 U CN 205725454U CN 201620315593 U CN201620315593 U CN 201620315593U CN 205725454 U CN205725454 U CN 205725454U
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- Prior art keywords
- voltage
- resistance
- boost chip
- connects
- electrical switch
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Abstract
The utility model discloses a kind of DC DC booster, including voltage input end and voltage output end, it is characterized in that the positive pole of voltage input end is connected with one end of electrical switch by inductance, one end of described electrical switch is connected with the positive pole of diode, the negative pole of described diode is connected with one end of electric capacity, the other end of electric capacity is connected with the negative pole of the other end of electrical switch and voltage input end, and described electric capacity and a resistor coupled in parallel connect, and the two ends of described resistance are connected with voltage output end respectively.The dutycycle of the control signal that this utility model controls end by regulation electronic switch regulates the voltage of voltage output end.The utility model has the advantage of that this booster can export constant output voltage.
Description
Technical field
This utility model relates to boost converter, is specifically related to a kind of DC DC booster.
Background technology
The most calibrated DC voltage, in renewable energy system, is stepped up as higher perseverance by boost converter
Determine output voltage, for battery and load.The design of booster circuit and exploitation mainly with the answering of its efficiency, output and design
Miscellaneous degree is correlated with.Regenerative resource such as solar energy, wind energy all utilize the medium that booster transmits as energy, to battery and having loaded
Become absorption and the injection process of energy, as shown in Figure 1.DC DC conversion regime has multiple, and existing DC DC booster exists effect
The problems such as rate is low, and ripple voltage is relatively big, and output voltage is unstable.
Utility model content
The purpose of this utility model is to provide a kind of DC DC booster realizing constant voltage output.
To achieve these goals, the technical solution of the utility model is as follows: a kind of DC DC booster, defeated including voltage
Enter end and voltage output end, it is characterised in that the positive pole of voltage input end is connected with one end of electrical switch by inductance, described
One end of electrical switch is connected with the positive pole of diode, and the negative pole of described diode is connected with one end of electric capacity, another of electric capacity
End is connected with the other end of electrical switch and the negative pole of voltage input end, and described electric capacity and a resistor coupled in parallel connect, described electricity
The two ends of resistance are connected with voltage output end respectively.
Described control unit is boost chip MC34063, and described electrical switch is field effect transistor IRFR3709.
The switching tube emitter terminal of described boost chip is connected with the grid of field effect transistor, the switching tube of described boost chip
Collector terminal is connected with the drain electrode of field effect transistor, the source ground of field effect transistor, the timing capacitor end of described boost chip and
One end of four capacitors connects, the other end ground connection of the 4th capacitor, the driving pipe collector of described boost chip and the first electricity
One end of resistance connects, and the other end of the first resistance is connected with the first end of detection resistance, the second termination input electricity of detection resistance
Pressure, the first end of detection resistance is also connected with one end of inductance, the other end of inductance and the switching tube collector terminal of boost chip
Connecting, the other end of described inductance is also connected with power output end, the current detecting end of described boost chip and detection resistance
First end connects, and input voltage is connected with the voltage end of boost chip, and the voltage end of boost chip passes through the first capacity earth, institute
One end of the comparator reverse input end and the 3rd resistance of stating boost chip connects, the other end ground connection of the 3rd resistance, described liter
The comparator reverse input end of pressure chip and one end of the 4th resistance connect, another termination voltage output end of the 4th resistance, institute
State power output end by the second capacity earth.
This utility model regulates voltage output end by the dutycycle of the control signal that regulation electronic switch controls end
Voltage.The utility model has the advantage of that this booster can export constant output voltage.Booster of the present utility model can be from
The input voltage of change produces the output voltage of 24 constant V, have chosen power consumption and the most relatively low micro-control of cost in the design
Device processed controls technology as Voltage Feedback, and global design has good performance, can be widely used for the phase such as solar energy, photovoltaic generation
Field, pass.
Accompanying drawing explanation
Fig. 1 is the use state diagram of DC DC booster.
Fig. 2 is circuit diagram of the present utility model.
Fig. 3 is the equivalent circuit diagram of pattern 1.
Fig. 4 is the equivalent circuit diagram of pattern 2.
Fig. 5 is the physical circuit figure of this utility model one embodiment.
Detailed description of the invention
It is described in conjunction with the accompanying operation principle of the present utility model in detail below.
A kind of DC DC booster, including voltage input end and voltage output end, it is characterised in that voltage input end is just
Pole is connected with one end of electrical switch by inductance, and one end of described electrical switch is connected with the positive pole of diode, described two poles
The negative pole of pipe is connected with one end of electric capacity, and the other end of electric capacity connects with the negative pole of the other end of electrical switch and voltage input end
Connecing, described electric capacity and a resistor coupled in parallel connect, and the two ends of described resistance are connected with voltage output end respectively, described electrical switch
Control end to be connected with control unit, described control unit output pwm signal.
Average output voltage is determined by the make-and-break time of electrical switch.Under fixing switching frequency, regulate make-and-break time
Method be referred to as pulse width modulation.Dutycycle k is defined as the ratio of ON time and switch periods, and different switch periods makes
Booster is operated in continuous conduction mode or discontinuous conduction mode.
In continuous conduction mode, it is subdivided into both of which.When pattern 1 starts from electrical switch SW Guan Bi, such as Fig. 3 institute
Showing, the input current of rising flows into inductance L and switch SW, and in this mode, energy is stored in inductance, and pattern 2 starts
Disconnect in electrical switch, inductance L, diode D, outputting inductance C and load R will be flowed to by the electric current of switch, as shown in Figure 4.
Inductive current is until the conducting of next cycle switch just begins to decline.For making DC DC booster be operated in continuous conduction mode, electricity
Inducing current IL is not zero, and can calculate inductance L
In formula, Lmin is minimum inductance value;K is dutycycle;R is output resistance;F is the switching frequency of SW.
DC-DC booster is operated in continuous conduction mode, for making the input voltage of fluctuation step up as higher 24 V
Constant output voltage.Due to the existence of ghost effect, dutycycle is between 0～0.75.For obtaining constant output voltage, adopt
Use voltage feedback control system.In this control system, the output voltage that measurement obtains is compared with reference voltage, and difference uses next life
Become pulse width modulating signal.Any variation of output voltage all can cause the change of the dutycycle of pwm signal.
The selection of electrical switch
The selection gist voltage of electrical switch SW and current rating, its value should be higher than that maximum input voltage value and electric current
Value.According to preferred embodiment of the present utility model, the rated power of this electrical switch is 100 W, during input voltage range 6～23
V。
The selection of inductance
Booster is operated in the minimum inductance value of pattern continuous time, and the inductance value therefore selected should be higher than that value of calculation.Push away
Recommend use FERRITE CORE or equivalent inducer.
The selection of diode
The target of overriding concern when diode reverse voltage rated value is to select.Other need the factor of consideration such as, anti-
Only diode enters the ability of cut-off state and has sufficiently large peak value and suitable average current, and high-speed switch characteristic is low
Reverse recovery current, low forward voltage degradation.
The selection of electric capacity
The position of minimum capacitance of the ripple voltage calculated, the size choosing electric capacity should be higher than that value of calculation.Another important consideration
Factor is equivalent resistance.Because low electric capacity can get better performance.
According to preferred embodiment of the present utility model, described control unit is boost chip MC34063, described electrical switch
For field effect transistor IRFR3709.
According to preferred embodiment of the present utility model, the switching tube emitter terminal Switch of described boost chip U1
Collector is connected with the grid of field effect transistor Q1, the switching tube collector terminal Switch Emitter of described boost chip U1
It is connected with the drain electrode of field effect transistor Q1, the source ground of field effect transistor Q1, the switching tube collector terminal of described boost chip U1
Switch Emitter is also by the second resistance eutral grounding, the timing capacitor end Timing Capacitor and of described boost chip
One end of four capacitor C4 connects, the other end ground connection of the 4th capacitor C4, the driving pipe collector end of described boost chip U1
One end of Driver Collector and the first resistance R1 connects, the other end of the first resistance R1 and the first of detection resistance Rsc
End connects, the second termination input voltage vin of detection resistance Rsc, and first end of detection resistance Rsc is also with one end of inductance L1 even
Connecing, the other end of inductance L1 is connected with the switching tube collector terminal Switch Emitter of boost chip U1, described inductance L1's
The other end is connected with power output end Vout also by diode D, the current detecting end Sense of described boost chip U1 and detection
First end of resistance Rsc connects, and input voltage is connected with the voltage end Vcc of boost chip U1, and the voltage end of boost chip U1 leads to
Cross the first electric capacity C1 ground connection, the comparator reverse input end Comparator Inverting Input of described boost chip U1 with
One end of 3rd resistance R3 connects, the other end ground connection of the 3rd resistance R3, the comparator reverse input end of described boost chip U1
One end of Comparator Inverting Input and the 4th resistance R4 connects, another termination voltage output of the 4th resistance R4
End Vout, described power output end Vout are by the second electric capacity C2 ground connection.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to
Assert that this utility model is embodied as being confined to these explanations above-mentioned.Common skill for this utility model art
For art personnel, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should
It is considered as belonging to protection domain of the present utility model.
Claims (3)
1. a DC DC booster, including voltage input end and voltage output end, it is characterised in that the positive pole of voltage input end
Being connected with one end of electrical switch by inductance, one end of described electrical switch is connected with the positive pole of diode, described diode
Negative pole be connected with one end of electric capacity, the negative pole of the other end of electric capacity and the other end of electrical switch and voltage input end is even
Connecing, described electric capacity and a resistor coupled in parallel connect, and the two ends of described resistance are connected with voltage output end respectively.
2. DC DC booster as claimed in claim 1, it is characterised in that described electrical switch is field effect transistor IRFR3709.
3. DC DC booster as claimed in claim 2, it is characterised in that the switching tube emitter terminal of described boost chip with
The grid of field effect transistor connects, and the switching tube collector terminal of described boost chip is connected with the drain electrode of field effect transistor, field effect transistor
Source ground, one end of the timing capacitor end of described boost chip and the 4th capacitor connects, the other end of the 4th capacitor
Ground connection, one end driving pipe collector and the first resistance of described boost chip connects, the other end of the first resistance and detection electricity
First end of resistance connects, the second termination input voltage of detection resistance, and the first end of detection resistance is also connected with one end of inductance,
The other end of inductance is connected with the switching tube collector terminal of boost chip, and the other end of described inductance is also with power output end even
Connecing, the current detecting end of described boost chip is connected with the first end of detection resistance, input voltage and the voltage end of boost chip
Connecting, the voltage end of boost chip passes through the first capacity earth, the comparator reverse input end of described boost chip and the 3rd electricity
One end of resistance connects, the other end ground connection of the 3rd resistance, the comparator reverse input end of described boost chip and the 4th resistance
One end connects, and another termination voltage output end of the 4th resistance, described power output end passes through the second capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315593.5U CN205725454U (en) | 2016-04-15 | 2016-04-15 | A kind of DC DC booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315593.5U CN205725454U (en) | 2016-04-15 | 2016-04-15 | A kind of DC DC booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205725454U true CN205725454U (en) | 2016-11-23 |
Family
ID=57308825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620315593.5U Expired - Fee Related CN205725454U (en) | 2016-04-15 | 2016-04-15 | A kind of DC DC booster |
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| Country | Link |
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| CN (1) | CN205725454U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276392A (en) * | 2017-06-29 | 2017-10-20 | 成都旭光光电技术有限责任公司 | A kind of voltage control system detected for ultraviolet light |
-
2016
- 2016-04-15 CN CN201620315593.5U patent/CN205725454U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276392A (en) * | 2017-06-29 | 2017-10-20 | 成都旭光光电技术有限责任公司 | A kind of voltage control system detected for ultraviolet light |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Dongda testing (Shanghai) Co., Ltd. Document name: Notification that Application Deemed not to be Proposed |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 200000, room 10-12, No. 1577, Lane 317, West Road, Jingan District, Shanghai Patentee after: Sky pass (Shanghai) Inspection Co., Ltd. Address before: 200000, room 10-12, No. 1577, Lane 317, West Road, Zhabei District, Shanghai Patentee before: Dongda testing (Shanghai) Co., Ltd. |
|
| 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: 20161123 Termination date: 20210415 |