CN106253665A - Increase the electric charge pump of buck amplitude - Google Patents
Increase the electric charge pump of buck amplitude Download PDFInfo
- Publication number
- CN106253665A CN106253665A CN201610752750.3A CN201610752750A CN106253665A CN 106253665 A CN106253665 A CN 106253665A CN 201610752750 A CN201610752750 A CN 201610752750A CN 106253665 A CN106253665 A CN 106253665A
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- CN
- China
- Prior art keywords
- square
- wave signal
- electric charge
- charge pump
- voltage
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/071—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate a negative voltage output from a positive voltage source
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Surgical Instruments (AREA)
Abstract
nullThe present invention provides a kind of electric charge pump increasing buck amplitude，Described electric charge pump includes a pulse width modulation chip，Described pulse width modulation chip includes a square-wave signal outfan、One controls end and a feedback end，Described feedback end connects a voltage output end by one first resistance，Described feedback end connects one end of one the 3rd resistance by one second resistance，The other end ground connection of described 3rd resistance，Described control end connects a switch terminals of a transistor，One input of described transistor and an outfan connect the two ends of described 3rd resistance respectively，Described square-wave signal outfan is used for exporting square-wave signal to provide voltage to described voltage output end，Described control end is for making described transistor turns make the voltage of described feedback end diminish in transmission control signal，Described pulse width modulation chip is for regulating the dutycycle of the square-wave signal of described square-wave signal outfan output to increase boosting or the amplitude of blood pressure lowering after the voltage of described feedback end diminishes.
Description
Technical field
The present invention relates to field of power supplies, particularly relate to a kind of electric charge pump increasing buck amplitude.
Background technology
Electric charge pump is a kind of fairly simple direct current transducer, can be used to liter malleation and is reduced to negative pressure, electric charge pump
Buck be all that discharge and recharge and the Capacitance Coupled of electric capacity are come by the signal (LX signal) exported by square-wave signal outfan
Completing, in this case, the driving force of electric charge pump can be more weak, the electric charge typically all stored on electric capacity, if negative
Carrying end needs load voltage relatively big, and close to the limit of electric charge pump, due to the problem of charging ability, boosting or blood pressure lowering cannot arrive one
Requirements, thus cause loading cisco unity malfunction.
Summary of the invention
For overcoming the deficiencies in the prior art, the present invention provides a kind of electric charge pump that can increase buck amplitude.
The present invention provides a kind of electric charge pump increasing buck amplitude, and described electric charge pump includes a pulse width modulation core
Sheet, described pulse width modulation chip includes a square-wave signal outfan, control end and a feedback end, and described feedback end passes through
One first resistance connects a voltage output end, and described feedback end connects one end of one the 3rd resistance by one second resistance, described
The other end ground connection of the 3rd resistance, described control end connects a switch terminals of a transistor, an input of described transistor and
One outfan connects the two ends of described 3rd resistance respectively, and described square-wave signal outfan is used for exporting square-wave signal with to described
Voltage output end provides voltage, and described control end is for making described transistor turns make described feedback end in transmission control signal
Voltage diminish, described pulse width modulation chip is for regulate described square-wave signal after the voltage of described feedback end diminishes defeated
Go out the dutycycle of square-wave signal of end output to increase boosting or the amplitude of blood pressure lowering.
Further, described square-wave signal outfan connects the negative pole of one first diode by one first electric capacity, described
The positive pole of the first diode connects described voltage output end, and the negative pole of described first diode is just connecting one second diode
Pole, the minus earth of described second diode, described pulse width modulation chip is for after the voltage of described feedback end diminishes
Regulate the dutycycle of square-wave signal of described square-wave signal outfan output to increase the amplitude of blood pressure lowering.
Further, described voltage output end passes through one second capacity earth.
Further, described voltage output end passes through one the 3rd capacity earth.
Further, described transistor is a field effect transistor, and described switch terminals is the grid of field effect transistor, described transistor
Input and outfan be respectively drain electrode and the source electrode of described field effect transistor.
Further, described square-wave signal outfan connects the positive pole of one first diode by one first electric capacity, described
The negative pole of the first diode connects described voltage output end, and the positive pole of described first diode connects the negative of one second diode
Pole, the positive pole pole of described second diode connects a voltage source, and described pulse width modulation chip is at described feedback end
Voltage regulates the dutycycle of the square-wave signal of described square-wave signal outfan output to increase the amplitude of boosting after diminishing.
Further, described voltage output end passes through one second capacity earth.
Further, described voltage output end passes through one the 3rd capacity earth.
In the present invention, described electric charge pump includes a transistor, reduces feedback end by controlling the conducting of transistor
Voltage, described pulse width modulation chip is defeated for regulating described square-wave signal outfan after the voltage of described feedback end diminishes
The dutycycle of the square-wave signal gone out is to increase boosting or the amplitude of blood pressure lowering, thus realizes increasing supercharging or the effect of decompression amplitude.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram that the present invention increases electric charge pump one embodiment of buck amplitude.
Fig. 2 is the circuit connection diagram that the present invention increases electric charge another embodiment of pump of buck amplitude.
Detailed description of the invention
Below, in conjunction with accompanying drawing, various embodiments of the present invention will be described in detail.
Referring to Fig. 1, in one embodiment, the electric charge pump of the increase buck amplitude of the present invention is for increasing the width of decompression
Degree, described electric charge pump includes that a pulse width modulation chip 10, described pulse width modulation chip 10 include that a square-wave signal is defeated
Go out to hold LX, a control end and a feedback end FB, described feedback end FB to connect a voltage output end VGL by a resistance R1, described
Feedback end FB connects one end of a resistance R3, the other end ground connection of described resistance R3 by a resistance R2, and described control end connects
One switch terminals of one transistor Q1, an input of described transistor Q1 and an outfan connect the two of described resistance R3 respectively
End, described square-wave signal outfan LX is used for exporting square-wave signal to provide negative voltage to described voltage output end VGL.
Described voltage output end VGL is by respectively by electric capacity C2, C3 ground connection.Described transistor Q1 is a field effect transistor,
Described switch terminals is the grid of field effect transistor, and the input of described transistor and outfan are respectively the drain electrode of described field effect transistor
And source electrode.
Described square-wave signal outfan LX connects the negative pole of a diode D1, the positive pole of described diode D1 by electric capacity C1
Connecting described voltage output end VGL, the negative pole of described diode D1 connects the positive pole of a diode D2, and described diode D2's is negative
Pole ground connection.
After described electric charge pump powers on, described control end makes described transistor Q1 turn in transmission control signal, makes resistance R3
Short circuit and decrease the divider resistance of described feedback end FB so that the voltage of described feedback end FB diminishes, described pulse width
Modulation chip is for regulating the square-wave signal of described square-wave signal outfan LX output after the voltage of described feedback end FB diminishes
Dutycycle with increase blood pressure lowering amplitude.
Referring to Fig. 2, in another embodiment, the electric charge pump of the increase buck amplitude of the present invention is for increasing decompression
Amplitude, described electric charge pump includes that a pulse width modulation chip 20, described pulse width modulation chip 20 include a square-wave signal
Outfan LX, a control end and a feedback end FB, described feedback end FB connect a voltage output end VGH, institute by a resistance R11
State one end that feedback end FB connects a resistance R31 by a resistance R21, the other end ground connection of described resistance R31, described control end
Connecting a switch terminals of a transistor Q11, an input and an outfan of described transistor Q11 connect described resistance respectively
The two ends of R31, described square-wave signal outfan LX is used for exporting square-wave signal to provide positive electricity to described voltage output end VGH
Pressure.
Described voltage output end VGH is by respectively by electric capacity C21, C31 ground connection.Described transistor Q11 is a field effect
Pipe, described switch terminals is the grid of field effect transistor, and the input of described transistor and outfan are respectively described field effect transistor
Drain electrode and source electrode.
Described square-wave signal outfan LX connects the positive pole of a diode D11 by electric capacity C1, and described diode D11's is negative
Pole connects described voltage output end VGH, and the positive pole of described diode D11 connects the negative pole of a diode D21, described diode D2
Positive pole connect a voltage source V0.
After described electric charge pump powers on, described control end makes described transistor Q11 turn in transmission control signal, makes resistance
R31 is short-circuit and decreases the divider resistance of described feedback end FB, so that the voltage of described feedback end FB diminishes, and described pulse width
Degree modulation chip is for regulating the square wave letter of described square-wave signal outfan LX output after the voltage of described feedback end FB diminishes
Number dutycycle with increase boosting amplitude.
Although illustrate and describing the present invention with reference to specific embodiment, but it should be appreciated by those skilled in the art that:
In the case of without departing from the spirit and scope of the present invention limited by claim and equivalent thereof, can carry out at this form and
Various changes in details.
Claims (8)
1. the electric charge pump increasing buck amplitude, it is characterised in that: described electric charge pump includes a pulse width modulation chip,
Described pulse width modulation chip includes a square-wave signal outfan, control end and a feedback end, and described feedback end passes through one
First resistance connects a voltage output end, and described feedback end connects one end of one the 3rd resistance by one second resistance, and described the
The other end ground connection of three resistance, described control end connects a switch terminals of a transistor, an input of described transistor and one
Outfan connects the two ends of described 3rd resistance respectively, and described square-wave signal outfan is used for exporting square-wave signal with to described electricity
Pressure outfan provides voltage, and described control end is for making described transistor turns make described feedback end in transmission control signal
Voltage diminishes, and described pulse width modulation chip is for regulating the output of described square-wave signal after the voltage of described feedback end diminishes
The dutycycle of the square-wave signal of end output is to increase boosting or the amplitude of blood pressure lowering.
Electric charge pump the most according to claim 1, it is characterised in that described square-wave signal outfan is by one first electric capacity even
Connecing the negative pole of one first diode, the positive pole of described first diode connects described voltage output end, described first diode
Negative pole connects the positive pole of one second diode, and the minus earth of described second diode, described pulse width modulation chip is used for
The dutycycle of square-wave signal of described square-wave signal outfan output is regulated to increase fall after the voltage of described feedback end diminishes
The amplitude of pressure.
Electric charge pump the most according to claim 2, it is characterised in that described voltage output end passes through one second capacity earth.
Electric charge pump the most according to claim 3, it is characterised in that described voltage output end passes through one the 3rd capacity earth.
Electric charge pump the most according to claim 1, it is characterised in that described transistor is a field effect transistor, described switch terminals
For the grid of field effect transistor, the input of described transistor and outfan are respectively drain electrode and the source electrode of described field effect transistor.
Electric charge pump the most according to claim 1, it is characterised in that described square-wave signal outfan is by one first electric capacity even
Connecing the positive pole of one first diode, the negative pole of described first diode connects described voltage output end, described first diode
Positive pole connects the negative pole of one second diode, and the positive pole pole of described second diode connects a voltage source, and described pulse width is adjusted
Coremaking sheet is for regulating the duty of the square-wave signal of described square-wave signal outfan output after the voltage of described feedback end diminishes
Than to increase the amplitude of boosting.
Electric charge pump the most according to claim 6, it is characterised in that described voltage output end passes through one second capacity earth.
Electric charge pump the most according to claim 7, it is characterised in that described voltage output end passes through one the 3rd capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752750.3A CN106253665B (en) | 2016-08-29 | 2016-08-29 | Increase the charge pump of buck amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752750.3A CN106253665B (en) | 2016-08-29 | 2016-08-29 | Increase the charge pump of buck amplitude |
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| Publication Number | Publication Date |
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| CN106253665A true CN106253665A (en) | 2016-12-21 |
| CN106253665B CN106253665B (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610752750.3A Active CN106253665B (en) | 2016-08-29 | 2016-08-29 | Increase the charge pump of buck amplitude |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317476A (en) * | 2017-07-19 | 2017-11-03 | 深圳市华星光电半导体显示技术有限公司 | Output voltage adjustment circuit and liquid crystal display device |
| WO2019015183A1 (en) * | 2017-07-19 | 2019-01-24 | 深圳市华星光电半导体显示技术有限公司 | Direct current voltage conversion circuit, direct current voltage conversion method, and liquid crystal display device |
| CN110138218A (en) * | 2019-06-25 | 2019-08-16 | 深圳市海浦蒙特科技有限公司 | A kind of band-type brake power supply of adjustable output voltage |
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| US20060139074A1 (en) * | 2004-12-24 | 2006-06-29 | Hiroki Doi | Charge pump DC / DC converter |
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| CN1661894A (en) * | 2004-02-27 | 2005-08-31 | 恩益禧电子股份有限公司 | Power supply circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317476A (en) * | 2017-07-19 | 2017-11-03 | 深圳市华星光电半导体显示技术有限公司 | Output voltage adjustment circuit and liquid crystal display device |
| WO2019015183A1 (en) * | 2017-07-19 | 2019-01-24 | 深圳市华星光电半导体显示技术有限公司 | Direct current voltage conversion circuit, direct current voltage conversion method, and liquid crystal display device |
| CN107317476B (en) * | 2017-07-19 | 2019-11-12 | 深圳市华星光电半导体显示技术有限公司 | Output voltage adjustment circuit and liquid crystal display device |
| CN110138218A (en) * | 2019-06-25 | 2019-08-16 | 深圳市海浦蒙特科技有限公司 | A kind of band-type brake power supply of adjustable output voltage |
| CN110138218B (en) * | 2019-06-25 | 2020-08-11 | 深圳市海浦蒙特科技有限公司 | Band-type brake power supply with adjustable output voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106253665B (en) | 2019-06-25 |
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