CN103840662B - DC boosting chopper circuit - Google Patents
DC boosting chopper circuit Download PDFInfo
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- CN103840662B CN103840662B CN201210483842.8A CN201210483842A CN103840662B CN 103840662 B CN103840662 B CN 103840662B CN 201210483842 A CN201210483842 A CN 201210483842A CN 103840662 B CN103840662 B CN 103840662B
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- resistor
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- pressure controller
- chopper circuit
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Abstract
The invention discloses a kind of DC boosting chopper circuit, and it includes boost inductance, fly-wheel diode, output capacitance, MOS switch pipe, first resistor, second resistance, 3rd resistor, boost pressure controller, digital analog converter；The grid of MOS switch pipe connects the gate drive signal output end of boost pressure controller；First resistor, second resistance are serially connected in the negative terminal of fly-wheel diode between ground；Digital analog converter is used for the data signal according to input, exports corresponding analog voltage；3rd resistor is connected on the analog voltage output end of digital analog converter to first resistor between the tie point of second resistance；Boost pressure controller includes a comparator；One input termination reference voltage of comparator, tie point of another input termination first resistor with second resistance；Boost pressure controller, according to the output of comparator, control output gate drive signal.The DC boosting chopper circuit of the present invention, the scope of output voltage can continuously be adjusted by software.
Description
Technical field
The present invention relates to power circuit, more particularly to a kind of DC boosting chopper circuit.
Background technology
DC boosting chopper circuit（the boost converter）, output voltage is higher than input voltage.Its basic circuit
As shown in Figure 1.
When Q1 is off, power supply VBAT is powered to the load by inductance L1, diode D1, now Q1 drain electrode electricity
Press as VBAT（Ignore the impedance of inductance and the conduction voltage drop of diode）, when Q1 is turned on, now Q1 drain voltage is become by VBAT
For 0, inductance both ends produce pressure drop, and inductive current starts to increase, and inductance starts to store energy；Now diode D1 is in off-state,
Output end provides energy from electric capacity C1 to load, and electric capacity releases energy, and Q1 shut-offs, contactor state is undergone mutation again, by
Magnetic field in the electric current continuation property of inductance, coil L1 will change the polarity at coil L1 both ends, to keep IL1 constant, now,
Inductance releases energy to late-class circuit, and inductive current constantly reduces, after inductive current reaches output end by diode, a part
Energy is provided to output, a part charges to electric capacity, and electric capacity starts to store energy, so moves in circles, will on output capacitance C1
Reach a poised state, stable output voltage is established.
In the sophisticated equipment application scenarios of many, it can all be related under the conditions of certain input voltage, it is desirable to defeated
Go out voltage range continuously adjustabe, especially in vehicle-mounted ECU（Engine control module）Fuel injector power supply on, general different oil spout
Type number requires different supply voltages.But existing DC boosting chopper circuit（the boost converter）, output electricity
Pressure scope can not be adjusted continuously, can not meet requirement of the different fuel injector models to supply voltage, and versatility is poor.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of DC boosting chopper circuit, the scope of its output voltage can lead to
Software is crossed continuously to adjust.
In order to solve the above technical problems, DC boosting chopper circuit provided by the invention, including a boost inductance, an afterflow
Diode, an output capacitance, a MOS switch pipe, first resistor, second resistance, 3rd resistor, boost pressure controller, digital-to-analogue conversion
Device；
The source and drain of the MOS switch pipe, one end ground connection, the anode of another termination fly-wheel diode and the boosting electricity
One end of sense；
The grid of the MOS switch pipe, connect the gate drive signal output end of boost pressure controller；
The other end of the boost inductance, connects external power source；
The negative terminal of the fly-wheel diode, the booster voltage output end as DC boosting chopper circuit；
The output capacitance, the negative terminal of the fly-wheel diode is connected on between ground；
The first resistor, second resistance are serially connected in the negative terminal of the fly-wheel diode between ground；
The digital analog converter, for the data signal according to input, export corresponding analog voltage；
The 3rd resistor, the analog voltage output end for being connected on the digital analog converter are electric with second to the first resistor
Between the tie point of resistance；
The boost pressure controller, including a comparator；
One input termination reference voltage of the comparator, another input terminate company of the first resistor with second resistance
Contact；
The boost pressure controller, according to the output of the comparator, control output gate drive signal.
Preferably, DC boosting chopper circuit also includes the 4th resistance；
The source and drain of the MOS switch pipe, one end pass through the 4th resistance eutral grounding；
The both ends of 4th resistance are connected to two current sample inputs of boost pressure controller, for MOS switch pipe
Source-drain current sampled；
The boost pressure controller, sampled according to the source-drain current of the output of the comparator and MOS switch pipe, control output
Gate drive signal.
Preferably, the MOS switch pipe is N-channel MOS FET；
The source electrode of the N-channel MOS FET meets anode and the institute of the fly-wheel diode by the 4th resistance eutral grounding, drain electrode
One end of boost inductance is stated, grid connects the gate drive signal output end of boost pressure controller.
The DC boosting chopper circuit of the present invention, because the data communication interface that can change digital analog converter by software is defeated
The data signal entered, so the output voltage software of digital analog converter is adjustable.Due to feedback reference voltage, first resistor, second
Resistance, the value of 3rd resistor are fixed, so the booster voltage of DC boosting chopper circuit output, with the adjustable digital-to-analogue conversion of software
The change of the output voltage of device and be monotonically changed, so as to the DC boosting chopper circuit of the present invention, output voltage range can lead to
Cross software continuously to adjust, adjustable range of output voltage is wide, and precision is high, and stepping is small, and different fuel injector models can be met to supplying
The requirement of piezoelectric voltage.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the accompanying drawing used required for the present invention is made below simple
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the basic circuit schematic diagram of DC boosting chopper circuit；
Fig. 2 is the embodiment schematic diagram of DC boosting chopper circuit one of the present invention.
Embodiment
Below in conjunction with accompanying drawing, clear, complete description is carried out to the technical scheme in the present invention, it is clear that described
Embodiment is the part of the embodiment of the present invention, rather than whole embodiments.It is general based on the embodiment in the present invention, this area
All other embodiment that logical technical staff is obtained on the premise of creative work is not made, belongs to protection of the present invention
Scope.
Embodiment one
DC boosting chopper circuit, including a boost inductance L1, a sustained diode 1, an output capacitance C1, a MOS are opened
Close pipe Q1, first resistor R1, second resistance R2,3rd resistor R3, a boost pressure controller, a digital analog converter DAC；
The source and drain of the MOS switch pipe Q1, one end ground connection, the anode and the liter of another termination sustained diode 1
Voltage inductance L1 one end；
The grid of the MOS switch pipe Q1, connect the gate drive signal GLS_T output ends of boost pressure controller；
The other end of the boost inductance L1, meets external power source VBAT；
The negative terminal of the sustained diode 1, the booster voltage VOUT output ends as DC boosting chopper circuit；
The output capacitance C1, the negative terminal of the sustained diode 1 is connected on between ground；
The first resistor R1, second resistance R2 are serially connected in the negative terminal of the sustained diode 1 between ground；
The digital analog converter DAC, for according to data communication interface（Such as SPI）The data signal of input, output are corresponding
Analog voltage VDAC；
The 3rd resistor R3, the analog voltage VDAC output ends for being connected on the digital analog converter DAC are electric to described first
Between tie points of the resistance R1 with second resistance R2；
The boost pressure controller, including a comparator AMP；
An input termination reference voltage VREF of the comparator AMP, another input terminate the first resistor R1 with the
Two resistance R2 tie point；
The boost pressure controller, according to the output of the comparator AMP, control exports gate drive signal GLS_T, so as to
Stablize the booster voltage VOUT of the negative terminal output of the sustained diode 1.
Embodiment two
Based on embodiment one, DC boosting chopper circuit also includes the 4th resistance R4；
The source and drain of the MOS switch pipe Q1, one end are grounded by the 4th resistance R4；
The 4th resistance R4, both ends are connected to two current sample input RSP_T, RSN_T of boost pressure controller, are used for
MOS switch pipe Q1 source-drain current is sampled；
The boost pressure controller, sampled according to the output of the comparator AMP and MOS switch pipe Q1 source-drain current, control
System output gate drive signal GLS_T, so as to stablize the booster voltage VOUT of the negative terminal of the sustained diode 1 output.
Embodiment three
Based on embodiment two, the MOS switch pipe Q1 is N-channel MOS FET（Metal-Oxide-
SemiconductorField-Effect Transistor, metal oxide layer-semiconductor-field-effect transistor）；
The source electrode of the MOS switch pipe Q1 by the 4th resistance eutral grounding, drain electrode connect the sustained diode 1 anode and
One end of the boost inductance L1, grid connect the gate drive signal GLS_T output ends of boost pressure controller.
Example IV
Based on embodiment three, digital analog converter DAC reference voltage can use 5V power supplys to power（5V power supplys are in temperature model
Interior error is enclosed no more than 2%）, first resistor R1 is 100K Ω, and second resistance R2 is 0.91K Ω, and 3rd resistor R3 is 10K Ω, instead
It is 0.7V to present reference voltage VREF.
The DC boosting chopper circuit of the present invention, boost inductance L1, MOS switch pipe Q1, sustained diode 1, boosting rectifier control
Device forms BOOST（Boosting）Circuit, first resistor R1, second resistance R2,3rd resistor R3 and digital analog converter DAC form output
Voltage software conditioned circuit.
As shown in Figure 2, VOUT=VREF+i1*R1, i1=i2+i3, i2=VREF/R2, i1 are the electric current for flowing through first resistor,
I2 is the electric current for flowing through second resistance, and i3 is the electric current for flowing through 3rd resistor, and three formula simultaneous can obtain：
VOUT=VREF*(1+R1/R2+R1/R3)-VDAC*(R1/R3)；
Due to digital analog converter DAC data communication interface can be changed by software（Such as SPI）The data signal of input, institute
It is adjustable with digital analog converter DAC output voltage VDAC softwares.Due to feedback reference voltage VREF, first resistor R1, the second electricity
Resistance R2,3rd resistor R3 value are fixed, so the booster voltage VOUT of DC boosting chopper circuit output, with the adjustable number of software
Weighted-voltage D/A converter DAC output voltage VDAC change and be monotonically changed, so as to the present invention DC boosting chopper circuit, output electricity
Pressure scope can continuously be adjusted by software, and adjustable range of output voltage is wide, and precision is high, and stepping is small, can meet different sprays
Requirement of the oily type number to supply voltage.And it can be realized by the precision for the control voltage for improving digital analog converter DAC
The high accuracy regulation of DC boosting chopper circuit output voltage, has great application prospect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (4)
1. a kind of DC boosting chopper circuit, including a boost inductance, a fly-wheel diode, an output capacitance, a MOS switch
Pipe, it is characterised in that also including first resistor, second resistance, 3rd resistor, boost pressure controller, digital analog converter；
Either end ground connection in the source electrode and drain electrode of the MOS switch pipe, the anode of another termination fly-wheel diode and
One end of the boost inductance；
The grid of the MOS switch pipe, connect the gate drive signal output end of boost pressure controller；
The other end of the boost inductance, connects external power source；
The negative terminal of the fly-wheel diode, the booster voltage output end as DC boosting chopper circuit；
The output capacitance, the negative terminal of the fly-wheel diode is connected on between ground；
The first resistor, second resistance are serially connected in the negative terminal of the fly-wheel diode between ground；
The digital analog converter, for the data signal according to input, export corresponding analog voltage；
The 3rd resistor, the analog voltage output end of the digital analog converter is connected on to the first resistor with second resistance
Between tie point；
The boost pressure controller, including a comparator；
One input termination reference voltage of the comparator, another input terminate connection of the first resistor with second resistance
Point；
The boost pressure controller, according to the output of the comparator, control output gate drive signal；
The booster voltage VOUT of the DC boosting chopper circuit is：
VOUT=VREF* (1+R1/R2+R1/R3)-VDAC* (R1/R3)；
VREF is reference voltage, and R1 is first resistor, and R2 is second resistance, and R3 is 3rd resistor, and VDAC is digital analog converter
Output voltage.
2. DC boosting chopper circuit according to claim 1, it is characterised in that
DC boosting chopper circuit also includes the 4th resistance；
Either end in the source electrode and drain electrode of the MOS switch pipe passes through the 4th resistance eutral grounding；
The both ends of 4th resistance are connected to two current sample inputs of boost pressure controller, for the source to MOS switch pipe
Leakage current is sampled；
The boost pressure controller, sampled according to the source-drain current of the output of the comparator and MOS switch pipe, control output grid
Drive signal.
3. DC boosting chopper circuit according to claim 2, it is characterised in that
The MOS switch pipe is N-channel MOS FET；
The source electrode of the N-channel MOS FET connects the anode of the fly-wheel diode and the liter by the 4th resistance eutral grounding, drain electrode
One end of voltage inductance, grid connect the gate drive signal output end of boost pressure controller.
4. DC boosting chopper circuit according to claim 3, it is characterised in that
The reference voltage of the digital analog converter is powered using 5V power supplys；
The first resistor is 100K Ω；
The second resistance is 0.91K Ω；
The 3rd resistor R3 is 10K Ω；
The reference voltage is 0.7V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483842.8A CN103840662B (en) | 2012-11-23 | 2012-11-23 | DC boosting chopper circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483842.8A CN103840662B (en) | 2012-11-23 | 2012-11-23 | DC boosting chopper circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103840662A CN103840662A (en) | 2014-06-04 |
| CN103840662B true CN103840662B (en) | 2017-11-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210483842.8A Expired - Fee Related CN103840662B (en) | 2012-11-23 | 2012-11-23 | DC boosting chopper circuit |
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| Country | Link |
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| CN (1) | CN103840662B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300779B (en) * | 2014-10-21 | 2017-07-21 | 陕西华经微电子股份有限公司 | Output voltage meets the DC/DC converters of y=kx+b relations with regulation voltage |
| CN108809089A (en) * | 2018-06-06 | 2018-11-13 | 浙江大学 | Wireless high-voltage controller |
| CN113013948B (en) * | 2021-03-09 | 2023-04-14 | 一汽解放汽车有限公司 | Board carries power supply control circuit |
| CN113271004A (en) * | 2021-05-21 | 2021-08-17 | 中国人民解放军战略支援部队航天工程大学 | Adjustable boost power supply of high accuracy software |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101068094A (en) * | 2007-05-30 | 2007-11-07 | 吴壬华 | Switch power source output voltage regulating method and realizing circuit |
| CN101641867A (en) * | 2007-02-06 | 2010-02-03 | 大动力公司 | Digital double-loop output voltage is regulated |
| CN101783587A (en) * | 2009-01-21 | 2010-07-21 | 成都芯源系统有限公司 | Circuit and method for providing power supply voltage for wireless network card |
| CN202268730U (en) * | 2011-10-31 | 2012-06-06 | 诸葛骏 | Power device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269162A (en) * | 1993-03-11 | 1994-09-22 | Hitachi Lighting Ltd | Power supply |
-
2012
- 2012-11-23 CN CN201210483842.8A patent/CN103840662B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641867A (en) * | 2007-02-06 | 2010-02-03 | 大动力公司 | Digital double-loop output voltage is regulated |
| CN101068094A (en) * | 2007-05-30 | 2007-11-07 | 吴壬华 | Switch power source output voltage regulating method and realizing circuit |
| CN101783587A (en) * | 2009-01-21 | 2010-07-21 | 成都芯源系统有限公司 | Circuit and method for providing power supply voltage for wireless network card |
| CN202268730U (en) * | 2011-10-31 | 2012-06-06 | 诸葛骏 | Power device |
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| CN103840662A (en) | 2014-06-04 |
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Granted publication date: 20171114 Termination date: 20211123 |