CN107528468A - A kind of high tension charge pump circuit - Google Patents
A kind of high tension charge pump circuit Download PDFInfo
- Publication number
- CN107528468A CN107528468A CN201610456247.3A CN201610456247A CN107528468A CN 107528468 A CN107528468 A CN 107528468A CN 201610456247 A CN201610456247 A CN 201610456247A CN 107528468 A CN107528468 A CN 107528468A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- charge pump
- high tension
- output voltage
- Prior art date
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
-
- 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
Abstract
A kind of high tension charge pump circuit, suitable for machine field.Circuit is by two-phase voltage-multiplier circuit, output voltage pressure differential detection circuit, the left polar plate voltage pressure difference of pump electric capacity examines lateral circuit, the circuit of driver 2 forms.Switching tube uses new power MOSFET in New Charge pump circuit, and the input of circuit and output voltage range are up to 13 V~45V.Driver completes the shift function of control brain wash, the conducting and shut-off of controlling switch pipe.High pressure pressure differential detection circuit, the left polar plate voltage of detection pump electric capacity and the difference of output voltage and supply voltage, and the input signal using testing result as linear modulation circuit are designed in circuit, generates feedback signal.Circuit structure is compact, and charge and discharge process is steady, and output voltage follows input voltage linear change, and voltage stabilization, ripple are low.
Description
Art
The present invention relates to a kind of high tension charge pump circuit, suitable for machine field.
Background technology
Based on the charge pump of switched capacitor technique with its low cost, the good characteristic of low EMI and high power efficiency,
The booster circuit module being widely used in various chips.Stepper motor driver chip mainly includes control circuit, H-bridge drive circuit
And power management module.Wherein, H bridges gate drive voltage then come from the charge pump circuit in power management module boosting it is defeated
Go out voltage.The high voltage of the wide defeated people's scope of driving chip is converted into the boosting linear with defeated people's voltage by charge pump circuit
Output voltage, it is necessary to design special feedback control loop, with regulation and regulated output voltage in the charge pump.Should in different
It is also different with occasion, the feedback sense circuit and feedback mode control of charge pump.Voltage Feedback detection circuit mainly uses
Electric resistance partial pressure mode, the high pressure pressure differential detection requirement being not appropriate in high voltage electricity pump;Feedback mode control kind is more, and control is multiple
It is miscellaneous, the charge pump design that is unsuitable in high-tension circuit high to the feedback sense circuit rate request of circuit；Electricity in low-voltage circuit
Hold charge and discharge system, starting efficiency is low in high-tension circuit, starts time length, peak point current is big during electric discharge, it is impossible to applied to height
Charge pump design in volt circuit.
The content of the invention
The present invention provides a kind of high tension charge pump circuit, and circuit structure is compact, and charge and discharge process is steady, and output voltage follows
Input voltage linear change, and voltage stabilization, ripple are low.
The technical solution adopted in the present invention is：
High tension charge pump circuit is by two-phase voltage-multiplier circuit, output voltage pressure differential detection circuit, the left polar plate voltage pressure difference of pump electric capacity
Examine lateral circuit, the circuit of driver 2 composition.
Switching tube uses new power MOSFET, the input of circuit and output voltage range in New Charge pump circuit
Up to 13 V~45V.Driver completes the shift function of control brain wash, the conducting and shut-off of controlling switch pipe.Designed in circuit high
Pressure differential detection circuit, the left polar plate voltage of detection pump electric capacity and the difference of output voltage and supply voltage are pressed, and testing result is made
For the input signal of linear modulation circuit, feedback signal is generated.Driver 2 is current control circuit, controls MN1 pipe charging currents
Size, improve the starting efficiency of circuit.For circuit under the control of feedback control loop, output voltage follows defeated people's voltage linear to become
Change, output voltage stabilization, ripple is relatively low.
Twice of gain charge pump circuit, when switching tube S2, S3 are closed, and S1, S4 disconnect, circuit is in charging rank
Section；When switching tube S1, S4 are closed, and S2, S3 disconnect, circuit is in discharge regime.Circuit structure is simple, and loss is low.But due to
Circuit uses common clock signal as switch controlled signal, among circuit structure cannot be used for high voltage step-up circuit, and by
Circuit topological structure determines that circuit voltage gain can not change.
The pressure differential detection comparison circuit mainly includes output voltage and supply voltage pressure differential detection circuit and supply voltage
With the left polar plate voltage VCP pressure differential detection circuits of pump electric capacity.
VEF is bandgap voltage reference, and V0 is charge pump output voltage, and Vin is the defeated people's voltage of charge pump, and VBE/R1 is by inclined
Put compensation electric current caused by current source.In view of output voltage V0 excursions are big, detection circuit use can bear the PNP of high pressure
The pressure difference of output voltage and input voltage is converted into electric current by pipe.PNP pipe emitter stage connects charge pump output voltage, PNP pipe base
Pole connects supply voltage VIN, PNP pipe colelctor electrode connection resistance R2.Due to the pressure drop VBE between the base stage and emitter stage of triode
With negative temperature coefficient, in order to eliminate negative temperature coefficient, induce one to compensate electric current.
In the left polar plate voltage pressure difference inspection lateral circuit of pump electric capacity, according to reference voltage VEF size, set R2's and R1
Scale, that is, the setting to output voltage V0 detection threshold voltage swings is completed, the output result of pressure differential detection circuit, is made
For defeated people's signal of linear modulation circuit, it is modulated with dutycycle for 50% clock signal, output control driver switch pipe
The signal of conducting and shut-off.
The circuit of driver 2 is by rationally setting IREF current size, resistance R2 and R1 size and MN1 pipes M1
Pipe width-length ratio, you can obtain preferable charging current, coordinate VCPI voltage detection modules, the first electric capacity can be preferably set
Cpump charging voltage sizes.It is twice of amount of charge stored in output capacitance by the quantity of electric charge stored on pump electric capacity control, can subtracts
The peak point current of small discharge regime, improve charge pump startup stage efficiency.
The beneficial effects of the invention are as follows：Circuit structure is compact, and charge and discharge process is steady, and output voltage follows input voltage line
Property change, and voltage stabilization, ripple are low.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the New Charge pump circuit overall construction drawing of the present invention.
Fig. 2 is the output voltage pressure differential detection circuit of the present invention.
Fig. 3 is the left polar plate voltage pressure difference inspection lateral circuit of pump electric capacity of the present invention.
Fig. 4 is the circuit of driver 2 of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, switching tube uses new power MOSFET, the input of circuit and output electricity in New Charge pump circuit
Scope is pressed up to 13 V~45V.Driver completes the shift function of control brain wash, the conducting and shut-off of controlling switch pipe.In circuit
High pressure pressure differential detection circuit, the left polar plate voltage of detection pump electric capacity and the difference of output voltage and supply voltage are designed, and will detection
As a result the input signal as linear modulation circuit, feedback signal is generated.Driver 2 is current control circuit, and control MN1 pipes fill
The size of electric current, improve the starting efficiency of circuit.For circuit under the control of feedback control loop, output voltage follows defeated people's pressure-wire
Property change, output voltage stabilization, ripple is relatively low.
Such as Fig. 2, twice of gain charge pump circuit, when switching tube S2, S3 are closed, and S1, S4 disconnect, circuit is in charging
Stage；When switching tube S1, S4 are closed, and S2, S3 disconnect, circuit is in discharge regime.Circuit structure is simple, and loss is low.But by
Common clock signal is used as switch controlled signal in circuit, among circuit structure cannot be used for high voltage step-up circuit, and
Determined by circuit topological structure, circuit voltage gain can not change.
Such as Fig. 3, pressure differential detection comparison circuit mainly includes output voltage and supply voltage pressure differential detection circuit and power supply electricity
Pressure and the left polar plate voltage VCP pressure differential detection circuits of pump electric capacity.
VEF is bandgap voltage reference, and V0 is charge pump output voltage, and Vin is the defeated people's voltage of charge pump, and VBE/R1 is by inclined
Put compensation electric current caused by current source.In view of output voltage V0 excursions are big, detection circuit use can bear the PNP of high pressure
The pressure difference of output voltage and input voltage is converted into electric current by pipe.PNP pipe emitter stage connects charge pump output voltage, PNP pipe base
Pole connects supply voltage VIN, PNP pipe colelctor electrode connection resistance R2.Due to the pressure drop VBE between the base stage and emitter stage of triode
With negative temperature coefficient, in order to eliminate negative temperature coefficient, induce one to compensate electric current.
Such as Fig. 4, the left polar plate voltage pressure difference of pump electric capacity is examined in lateral circuit, according to reference voltage VEF size, sets R2 and R1
Scale, that is, complete the setting to output voltage V0 detection threshold voltage swings, the output result of pressure differential detection circuit,
As defeated people's signal of linear modulation circuit, it is modulated with dutycycle for 50% clock signal, output control driver switch
Pipe turns on the signal with shut-off.
For the circuit of driver 2 by rationally setting IREF current size, resistance R2 and R1 size and MN1 pipe M1 pipes are wide
Long ratio, you can obtain preferable charging current, coordinate VCPI voltage detection modules, the first electric capacity can be preferably set
Cpump charging voltage sizes.It is twice of amount of charge stored in output capacitance by the quantity of electric charge stored on pump electric capacity control, can subtracts
The peak point current of small discharge regime, improve charge pump startup stage efficiency.
Claims (9)
1. a kind of high tension charge pump circuit, it is characterized in that：Described high tension charge pump circuit is by two-phase voltage-multiplier circuit, output electricity
Press the left polar plate voltage pressure difference inspection lateral circuit of pressure differential detection circuit, pump electric capacity, the circuit of driver 2 composition.
2. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：Switched in the New Charge pump circuit
Pipe uses new power MOSFET, and the input of circuit and output voltage range are up to 13 V~45V.
3. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：The high pressure pressure of described charge pump circuit
Difference detecting circuit, the left polar plate voltage of detection pump electric capacity and the difference of output voltage and supply voltage, and using testing result as line
Property modulation circuit input signal, generate feedback signal.
4. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：Described twice of gain charge pump electricity
Road, when switching tube S2, S3 are closed, and S1, S4 disconnect, circuit is in the charging stage；When switching tube S1, S4 are closed.
5. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：The pressure differential detection comparison circuit is main
Including output voltage and supply voltage pressure differential detection circuit and supply voltage polar plate voltage VCP pressure differential detections electricity left with pump electric capacity
Road.
6. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：The pressure differential detection circuit use can
The pressure difference of output voltage and input voltage is converted into electric current by the PNP pipe for bearing high pressure.
7. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：In the pressure differential detection circuit, PNP pipe
Emitter stage connects charge pump output voltage, PNP pipe base stage connection supply voltage VIN, PNP pipe colelctor electrode connection resistance R2.
8. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：The left polar plate voltage pressure difference of pump electric capacity
Examine in lateral circuit, according to reference voltage VEF size, R2 and R1 scale is set, that is, completes and output voltage V0 is examined
Survey the setting of threshold voltage size.
9. a kind of high tension charge pump circuit according to claim 1, it is characterized in that：The circuit of driver 2 is by rationally setting
IREF current size, resistance R2 and R1 size and MN1 pipe M1 pipe width-length ratios, you can obtain preferable charging current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610456247.3A CN107528468A (en) | 2016-06-22 | 2016-06-22 | A kind of high tension charge pump circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610456247.3A CN107528468A (en) | 2016-06-22 | 2016-06-22 | A kind of high tension charge pump circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107528468A true CN107528468A (en) | 2017-12-29 |
Family
ID=60735350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610456247.3A Pending CN107528468A (en) | 2016-06-22 | 2016-06-22 | A kind of high tension charge pump circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107528468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153365A (en) * | 2018-02-02 | 2018-06-12 | 深圳市天微电子股份有限公司 | Height matching high-precision pressure difference generative circuit |
| CN110445208A (en) * | 2019-08-05 | 2019-11-12 | 维沃移动通信有限公司 | A kind of charging circuit and terminal |
-
2016
- 2016-06-22 CN CN201610456247.3A patent/CN107528468A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153365A (en) * | 2018-02-02 | 2018-06-12 | 深圳市天微电子股份有限公司 | Height matching high-precision pressure difference generative circuit |
| CN108153365B (en) * | 2018-02-02 | 2024-03-26 | 深圳市天微电子股份有限公司 | High-matching high-precision voltage difference generating circuit |
| CN110445208A (en) * | 2019-08-05 | 2019-11-12 | 维沃移动通信有限公司 | A kind of charging circuit and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171229 |
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| WD01 | Invention patent application deemed withdrawn after publication |