CN208723787U - A kind of booster circuit - Google Patents
A kind of booster circuit Download PDFInfo
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- CN208723787U CN208723787U CN201821601285.4U CN201821601285U CN208723787U CN 208723787 U CN208723787 U CN 208723787U CN 201821601285 U CN201821601285 U CN 201821601285U CN 208723787 U CN208723787 U CN 208723787U
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- control unit
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- effect tube
- operational amplifier
- switch field
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Abstract
The utility model provides a kind of booster circuit, including boost module and is connected to the voltage input end Vin and voltage output end Vout at boost module both ends, is connected with energy storage inductor L1 between the voltage input end Vin and boost module；The boost module includes: control unit；Oscillating unit is connect with control unit, for issuing pulse according to the frequency of oscillation of control unit；Switch unit is connect with control unit；Feedback unit is connect with control unit, for according to loop state feedback information.The utility model has the advantages that at low cost, high conversion efficiency, small in size, and battery life can be substantially improved, and reduces amount of battery consumption and reaches energy conservation and environmental protection purpose.
Description
Technical field
The utility model relates to power boost technical field more particularly to a kind of booster circuits.
Background technique
Present high-precision AD conversion chip requires the supply voltage of 2.5V or more, with 2 section 1.5V(1.5V*2=3V) dry cell
The supplying cell service life only has 50 hours or so, and with 4 section 1.5V dry cells, then volume is too big, and with lithium battery, then cost is too high, also
Lithium electricity, which will charge, wants waiting for a long time, is unable to plug and play.
Utility model content
The utility model in order to solve the technical problem, provides a kind of booster circuit.
The utility model provides a kind of booster circuit, including boost module and is connected to the electricity at boost module both ends
Input terminal Vin and voltage output end Vout is pressed, is connected with energy storage inductor L1 between the voltage input end Vin and boost module；
The boost module includes:
Control unit；
Oscillating unit is connect with control unit, for issuing pulse according to the frequency of oscillation of control unit；
Switch unit is connect with control unit；
Feedback unit is connect with control unit, for according to loop state feedback information.
Further, the oscillating unit uses oscillator.
Further, described control unit uses PFM controller.
Further, the switch unit includes first switch field-effect tube Q1 and second switch field-effect tube Q2；It is described
The drain electrode of first switch field-effect tube Q1 is connect with the energy storage inductor L1 far from one end of the voltage input end Vin, and with
The drain electrode of second switch field-effect tube Q2 connects；The source electrode of first switch field-effect tube Q1 is grounded by first resistor R1；First
The grid of switching field effect transistor Q1 is connect after connecting with the grid of second switch field-effect tube Q2 with control unit；Second switch field
The source electrode of effect pipe Q2 is connect with the voltage output end Vout.
Further, the feedback unit includes the first operational amplifier K1 and second operational amplifier K2, and described second
The source electrode of switching field effect transistor Q2 is grounded after being connected with second resistance R2 and 3rd resistor R3 in turn；First operational amplifier
The non-inverting input terminal of K1 is connected between second resistance R2 and 3rd resistor R3, the out-phase input of the first operational amplifier K1
End is connected with the first power supply Vref, and the output end of the first operational amplifier K1 is connected to control unit；Second operation
The non-inverting input terminal of amplifier K2 is connected to the source electrode of first switch field-effect tube Q1, the out-phase input of second operational amplifier K2
End is connected with second source VB, and the output end of the second operational amplifier K2 is connected to control unit.
Further, after the tie point between the voltage input end Vin and energy storage inductor L1 is connected to the second capacitor C2
Ground connection；Tie point between the voltage output end Vout and boost module is grounded after being connected to storage capacitor C1.
The beneficial effects of the utility model are: the utility model passes through in voltage input end Vin and voltage output end Vout
Between increase boost module, by control unit control oscillating unit frequency of oscillation, utilize oscillating unit issue impulse level
To the closing and conducting of control switch unit, thus by energy storage inductor L1 and storage capacitor C1 with the use of so that voltage
The voltage of input terminal Vin still can compensate use by energy storage inductor L1 and storage capacitor C1 after decline, simply just
It is prompt；In addition, being equipped with feedback unit, can be adjusted by feedback unit according to frequency of the loop state to oscillating unit, into
One step avoids waste of energy, has the advantages that at low cost, high conversion efficiency, small in size, and battery life can be substantially improved, and reduces electricity
Pond consumption reaches energy conservation and environmental protection purpose.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the utility model booster circuit one embodiment.
Fig. 2 is the circuit connection diagram of the utility model booster circuit one embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the utility model and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
The utility model is described in further detail below by specific embodiment combination attached drawing.
As shown in Fig. 1 ~ Fig. 2, the utility model provides a kind of booster circuit, including boost module and is connected to liter
The voltage input end Vin and voltage output end Vout at die block both ends, connect between the voltage input end Vin and boost module
There is energy storage inductor L1；The boost module includes:
Control unit 1；
Oscillating unit 2 is connect with control unit 1, for issuing pulse according to the frequency of oscillation of control unit 1；
Switch unit 3 is connect with control unit 1；
Feedback unit 4 is connect with control unit 1, for according to loop state feedback information.
The utility model passes through control by increasing boost module between voltage input end Vin and voltage output end Vout
Unit 1 processed controls the frequency of oscillation of oscillating unit, issues impulse level using oscillating unit 2 to the pass of control switch unit 3
It closes and is connected, thus being used cooperatively so that the voltage of voltage input end Vin is under by energy storage inductor L1 and storage capacitor C1
Still use can be compensated by energy storage inductor L1 and storage capacitor C1 after drop, it is simple and convenient；In addition, being equipped with feedback unit
4, it can be adjusted by feedback unit 4 according to frequency of the loop state to oscillating unit 2, further avoid waste of energy,
Have the advantages that at low cost, high conversion efficiency, small in size, battery life can be substantially improved, reduces amount of battery consumption and reach energy conservation
Environmentally friendly purpose.
In a specific embodiment, the oscillating unit 2 uses oscillator.Described control unit 1 is controlled using PFM
Device.
In one alternate embodiment, the switch unit 3 includes that first switch field-effect tube Q1 and second switch field are imitated
It should pipe Q2；The first switch field-effect tube Q1 drain electrode with the energy storage inductor L1 far from the voltage input end Vin one
End connection, and connect with the drain electrode of second switch field-effect tube Q2；The source electrode of first switch field-effect tube Q1 passes through first resistor
R1 ground connection；The grid of first switch field-effect tube Q1 connects after connecting with the grid of second switch field-effect tube Q2 with control unit 1
It connects；The source electrode of second switch field-effect tube Q2 is connect with the voltage output end Vout.The feedback unit 4 includes the first operation
Amplifier K1 and second operational amplifier K2, the source electrode of the second switch field-effect tube Q2 be connected in turn second resistance R2 and
It is grounded after 3rd resistor R3；The non-inverting input terminal of the first operational amplifier K1 is connected to second resistance R2 and 3rd resistor R3
Between, the out-phase input terminal of the first operational amplifier K1 is connected with the first power supply Vref, the first operational amplifier K1
Output end be connected to control unit 1；The non-inverting input terminal of the second operational amplifier K2 is connected to first switch field-effect
The source electrode of pipe Q1, the out-phase input terminal of second operational amplifier K2 are connected with second source VB, the second operational amplifier K2
Output end be connected to control unit 1.Tie point between the voltage input end Vin and energy storage inductor L1 is connected to the second electricity
It is grounded after holding C2；Tie point between the voltage output end Vout and boost module is grounded after being connected to storage capacitor C1.
The implementation principle of the utility model is as follows: when oscillator exports pulse high level, first switch field-effect tube Q1
Conducting, the 2nd 1 switching field effect transistor Q2 cut-off, the voltage of voltage input end Vin is through energy storage inductor L1 and first switch field at this time
Effect pipe Q1 forms inductive current to ground terminal.When closing to first switch field-effect tube Q1, the electric current of energy storage inductor L1 is to most
It is big to be worth, electric energy is stored in energy storage inductor L1；When oscillator exports pulses low, first switch field-effect tube Q1 can be cut
Only, second switch field-effect tube Q2 is connected.Induced voltage in the voltage superposition of voltage input end Vin on energy storage inductor L1, warp
Second switch field-effect tube Q2 charges to storage capacitor C1, and the energy release in energy storage inductor L1 achievees the effect that boosting.
Due to the higher general several hundred kilohertzs of oscillator frequency, so the voltage by after a certain period of time, on storage capacitor C1
Constantly increasing, the voltage between second resistance R2 and 3rd resistor R3 increases, and the first operational amplifier K1 output voltage also increases,
Control unit 1, which is adjusted, reduces output pulse frequency, so that the voltage stabilization of voltage output end Vout.
At this point, when the load current Iout by first resistor R1, which increases, declines the voltage of voltage output end Vout,
By second operational amplifier K2 feedback signal to control unit 1, control unit 1 improves the output pulse frequency of oscillator, makes
Obtain the voltage stabilization of voltage output end Vout.
The above content is combine specific embodiment further detailed description of the utility model, and it cannot be said that
The specific implementation of the utility model is only limited to these instructions.For the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made.
Claims (6)
1. a kind of booster circuit, which is characterized in that including boost module and be connected to the voltage input at boost module both ends
Vin and voltage output end Vout is held, energy storage inductor L1, the electricity are connected between the voltage input end Vin and boost module
Tie point between pressure output end vo ut and boost module is grounded after being connected to storage capacitor C1；The boost module includes:
Control unit；
Oscillating unit is connect with control unit, for issuing pulse according to the frequency of oscillation of control unit；
Switch unit is connect with control unit；
Feedback unit is connect with control unit, for according to loop state feedback information.
2. a kind of booster circuit as described in claim 1, it is characterised in that: the oscillating unit uses oscillator.
3. a kind of booster circuit as described in claim 1, it is characterised in that: described control unit uses PFM controller.
4. a kind of booster circuit as described in claim 1, it is characterised in that: the switch unit includes first switch field-effect
Pipe Q1 and second switch field-effect tube Q2；The drain electrode of the first switch field-effect tube Q1 and the energy storage inductor L1 are far from described
One end of voltage input end Vin connects, and connect with the drain electrode of second switch field-effect tube Q2；First switch field-effect tube Q1's
Source electrode is grounded by first resistor R1；The grid of first switch field-effect tube Q1 is connect with the grid of second switch field-effect tube Q2
It is connect afterwards with control unit；The source electrode of second switch field-effect tube Q2 is connect with the voltage output end Vout.
5. a kind of booster circuit as claimed in claim 4, it is characterised in that: the feedback unit includes the first operational amplifier
K1 and second operational amplifier K2, the source electrode of the second switch field-effect tube Q2 are connected with second resistance R2 and third electricity in turn
It is grounded after resistance R3；The non-inverting input terminal of the first operational amplifier K1 is connected between second resistance R2 and 3rd resistor R3,
The out-phase input terminal of the first operational amplifier K1 is connected with the first power supply Vref, the output of the first operational amplifier K1
End is connected to control unit；The non-inverting input terminal of the second operational amplifier K2 is connected to the source of first switch field-effect tube Q1
Pole, the out-phase input terminal of second operational amplifier K2 are connected with second source VB, the output end of the second operational amplifier K2
It is connected to control unit.
6. a kind of booster circuit as claimed in claim 1 or 5, it is characterised in that: the voltage input end Vin and energy storage inductor
Tie point between L1 is grounded after being connected to the second capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601285.4U CN208723787U (en) | 2018-09-29 | 2018-09-29 | A kind of booster circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601285.4U CN208723787U (en) | 2018-09-29 | 2018-09-29 | A kind of booster circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208723787U true CN208723787U (en) | 2019-04-09 |
Family
ID=65983056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821601285.4U Active CN208723787U (en) | 2018-09-29 | 2018-09-29 | A kind of booster circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208723787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155114A (en) * | 2023-10-30 | 2023-12-01 | 江苏芯潭微电子有限公司 | Voltage modulation circuit for converting lithium battery into dry battery and power supply system |
-
2018
- 2018-09-29 CN CN201821601285.4U patent/CN208723787U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155114A (en) * | 2023-10-30 | 2023-12-01 | 江苏芯潭微电子有限公司 | Voltage modulation circuit for converting lithium battery into dry battery and power supply system |
| CN117155114B (en) * | 2023-10-30 | 2024-01-26 | 江苏芯潭微电子有限公司 | Voltage modulation circuit for converting lithium battery into dry battery and power supply system |
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