CN208937996U - A kind of voltage follower circuit for ore machine apparatus - Google Patents
A kind of voltage follower circuit for ore machine apparatus Download PDFInfo
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- CN208937996U CN208937996U CN201821986134.5U CN201821986134U CN208937996U CN 208937996 U CN208937996 U CN 208937996U CN 201821986134 U CN201821986134 U CN 201821986134U CN 208937996 U CN208937996 U CN 208937996U
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- pressure difference
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Abstract
The utility model provides a kind of voltage follower circuit for ore machine apparatus, including voltage input end, voltage output end, pressure difference control circuit and feedback control circuit, the input terminal of the pressure difference control circuit is separately connected voltage input end and voltage output end, one end of the feedback control circuit is connected with the output end of the pressure difference control circuit, and the other end is connected between voltage input end and voltage output end；The pressure difference control circuit obtains feedback voltage for determining the voltage difference between voltage output end and voltage input end, and input voltage and the voltage difference according to voltage input end；The feedback control circuit is used to carry out feedback adjustment according to output voltage of the feedback voltage to voltage output end；The circuit is realized when the input voltage to mine machine is adjusted, and the pressure difference of booster circuit is kept constant, and then mine machine is made to be able to maintain stable working condition.
Description
Technical field
The utility model relates to electronic technology fields, more particularly, to a kind of voltage follow electricity for ore machine apparatus
Road.
Background technique
Ore machine apparatus calculates the design side that power chip mostly uses greatly chip-in series to improve the efficiency that mine machine core piece calculates power
Formula, while every grade of chip requires a stable low pressure difference linear voltage regulator and provides burning voltage, and each low pressure difference linearity
The input voltage of voltage-stablizer is higher than the operating voltage for the calculation power chip being connected, then each low pressure difference linear voltage regulator is defeated
Certain requirement will also be met by entering voltage.In order to meet the input voltage requirement of low pressure difference linear voltage regulator, need to external electrical
Source input voltage boosts, and the voltage for the booster circuit output applied on major part ore machine apparatus at present is all a fixation
Value.I.e. when the input voltage of external power supply changes, the output voltage of booster circuit is kept constant, then low pressure difference linearity
The pressure difference of voltage-stablizer will change with the variation of input voltage, when pressure difference design margin is too small, mine machine be easy to cause to calculate
Power is abnormal；When pressure difference design margin is larger, it be easy to cause low pressure difference linear voltage regulator temperature excessively high and damages.So
How to design a kind of output voltage that is able to achieve to follow the variation of input voltage and change, so that the pressure difference of the two is a perseverance
The booster circuit of definite value is to suffer from a problem that at present.
Utility model content
The purpose of this utility model is to provide a kind of voltage follower circuits for ore machine apparatus, realize to mine machine
Input voltage when being adjusted, the pressure difference of booster circuit is kept constant, and then mine machine is made to be able to maintain stable working condition.
To achieve the above object, the utility model provides a kind of voltage follower circuit for ore machine apparatus, including electricity
Press input terminal, voltage output end, pressure difference control circuit and feedback control circuit, the input terminal difference of the pressure difference control circuit
Connect voltage input end and voltage output end, the output end company of one end of the feedback control circuit and the pressure difference control circuit
It connects, the other end is connected between voltage input end and voltage output end；
The pressure difference control circuit is used to determine voltage difference between voltage output end and voltage input end, and according to electricity
The input voltage of pressure input terminal and the voltage difference, obtain feedback voltage；
The feedback control circuit is used to carry out feedback tune according to output voltage of the feedback voltage to voltage output end
It is whole.
Preferably, the pressure difference control circuit includes concatenated first resistor and second resistance, the first resistor and
PNP type triode is in series between two resistance, the base stage of the PNP type triode is connected with the voltage input end.
Preferably, the feedback control circuit includes electric pressure converter and inductance, and the inductance is arranged in voltage input end
Between voltage output end, one end of the electric pressure converter is connected between voltage input end and inductance, and the other end is connected to
Between voltage output end and inductance.
Preferably, the voltage follower circuit further includes filter circuit, and the filter circuit is used to filter and burning voltage,
Including diode and the first filter capacitor, the diode is connected between inductance and voltage output end, first filtered electrical
Hold the both ends for being connected to the pressure difference control circuit.
Preferably, the first resistor and second resistance are variable resistances.
Preferably, the collector of the PNP type triode is connected with the electric pressure converter.
Preferably, the electric pressure converter is DC-DC converter.
Preferably, the voltage input end is connected with 3rd resistor and the second filter capacitor.
The utility model compared with prior art, has the following advantages and outstanding effects:
A kind of voltage follower circuit for ore machine apparatus provided by the utility model passes through first resistor and second resistance
The ratio of resistance value determines the pressure difference that pressure difference control circuit needs to control, and then feedback control circuit is defeated according to the pressure difference and voltage
The input voltage for entering end is adjusted the output voltage of voltage output end so that output voltage with the variation of input voltage and
Change, guarantees that the pressure difference between output voltage and input voltage is constant, and then mine machine is made to be able to maintain stable working condition, increase
The strong reliability of equipment.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of circuit signal of the voltage follower circuit for ore machine apparatus disclosed in the utility model embodiment
Figure；
Fig. 2 shows for a kind of application scenarios of the voltage follower circuit for ore machine apparatus disclosed in the utility model embodiment
It is intended to.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Figure 1, the utility model embodiment discloses a kind of voltage follower circuit for ore machine apparatus, the voltage
Following circuit includes voltage input end, is grounded GND, voltage output end, pressure difference control circuit, feedback control circuit and filtered electrical
Road；Pressure difference control circuit is for determining the voltage difference between voltage output end and voltage input end, and pressure difference control circuit is by connecting
Resistance R1, PNP type triode Q1 and resistance R2 composition.The base stage of PNP type triode Q1 is connected with voltage input end Vin, electricity
Resistance R1 is separately connected the emitter and voltage output end Vout of PNP type triode Q1, the collector and resistance of PNP type triode Q1
One end of R2 connects, resistance R2 other end connection ground connection GND.
Feedback control circuit is used for according to the input voltage of above-mentioned voltage difference and voltage input end to the defeated of voltage output end
Voltage carries out feedback adjustment out, and feedback control circuit includes electric pressure converter and inductance, and in the present embodiment, electric pressure converter is
DC-DC converter, inductance are arranged between voltage input end and voltage output end, and the VIN pin of DC-DC converter is connected to electricity
It presses between input terminal and inductance, SW pin is connected between voltage output end and inductance, and the FB pin of DC-DC converter is connected to
Between the collector and resistance R2 of PNP type triode Q1, the GND pin connection ground connection GND of DC-DC converter.DC-DC converter
EN pin connected with voltage input end by resistance R3, voltage input end Vin is also connected with filter capacitor C1, filter capacitor C1
The other end connection ground connection GND.
Filter circuit is for filtering and burning voltage, including diode D and filter capacitor C2, diode be connected to inductance and
Between voltage output end, filter capacitor C2 is connected between voltage output end and ground connection GND.
Filter capacitor C1 prevents the wavy voltage of input to the damage of access load for playing filter action to input voltage
Evil.The VIN pin of DC-DC converter provides the supply voltage of DC-DC converter, and SW pin provides switching signal control, DC-DC
Converter inside booster circuit and inductance L collectively form the circuit to boost to input voltage, and diode D is played to boosting
The stabilization of voltage afterwards, filter capacitor C2 play a filtering role output voltage, with protection access load.
The voltage follower circuit is according to the base stage conduction voltage drop Vb, reference voltage Vf, resistance R1 and R2 of PNP type triode Q1
Resistance value, obtain the voltage difference of output voltage and input voltage, then according to the voltage difference and input voltage, obtain output electricity
Pressure.When input voltage reduces, the feedback voltage of triode Q1 output is obtained according to the output voltage and input voltage, i.e.,
The collector voltage of triode Q1.Reference voltage Vf is provided in DC-DC converter, the FB pin of DC-DC converter is as anti-
Feedback voltage and reference voltage Vf are compared by feedthrough voltage input terminal, and feedback voltage is greater than reference voltage at this time, then SW draws
Foot control output voltage reduces.
Specifically, the base stage conduction voltage drop of triode Q1 is expressed as Vb, Vb is held essentially constant, DC-DC converter
The reference voltage of interior setting is Vf, is expressed as Ie by the electric current of triode Q1 emitter in the circuit, passes through triode Q1 collection
The electric current of electrode is expressed as Ic, is expressed as Ib by the electric current of triode Q1 base stage, then Ie=(Vout-Vin-Vb)/R1, Ic=
Vf/R2, Ic=Ie+Ib, and the electric current Ib by base stage is much larger than by the electric current Ic of triode Q1 collector, so available
Ic=Ie, then (Vout-Vin-Vb)/R1=Vf/R2, can be obtained Vout-Vin=Vf* (R1/R2)+Vb, as long as resistance R1 and electricity
The ratio for hindering R2 resistance value is constant, then the pressure difference of voltage output end Vout and voltage input end Vin are maintained for constant, realizes electricity
Pressure follows.
Specifically, by Ie=(Vout-Vin-Vb)/R1 it is found that logical when the input voltage vin of voltage input end reduces
The electric current Ie for crossing triode Q1 emitter becomes larger, then the electric current Ic by triode Q1 collector will increase, triode Q1 collection
The voltage Vc of electrode at this time will be greater than the reference voltage Vf of DC-DC converter FB pin, and DC-DC converter detects the above results
Later, the voltage Vout after input voltage vin boosting will be reduced by the control of SW pin, is adjusted repeatedly, until making three
The voltage Vc of pole pipe Q1 collector tends to the reference voltage Vf equal to DC-DC converter FB pin.When the input of voltage input end
When voltage Vin increases, the feedback principle of the voltage follower circuit of the present embodiment can refer to principle when above-mentioned input voltage reduces
Illustrate to realize, it is no longer redundant later.
The disclosed voltage follower circuit for mine and equipment of the present embodiment can utilize existing most of DC-DC converters
Ancillary peripheral circuit is realized, is provided convenience to simplify design.As shown in Fig. 2, being used for mine machine present embodiment discloses above-mentioned
A kind of application scenarios of the voltage follower circuit of equipment, the voltage follower circuit in figure is using one kind disclosed in Fig. 1 for mine machine
The voltage follower circuit of equipment realizes that LDO (low dropout regulator) is low pressure difference linear voltage regulator, due to this
Voltage follower circuit realizes constant voltage difference, and the top of mine machine cascaded design is arranged in, so that when input voltage is adjusted
When, it is added in and keeps inconvenient with the pressure difference calculated on the low pressure difference linear voltage regulator LDO that power chip is connect, this ensure that mine
During the input voltage of machine is adjusted, mine machine still is able to keep stable working condition.
A kind of voltage follower circuit for ore machine apparatus disclosed in the present embodiment is hindered by first resistor and second resistance
The ratio of value determines the pressure difference that pressure difference control circuit needs to control, and then feedback control circuit is according to the pressure difference and voltage input
The input voltage at end is adjusted the output voltage of voltage output end, so that output voltage changes with the variation of input voltage
Become, guarantees that the pressure difference between output voltage and input voltage is constant, and then mine machine is made to be able to maintain stable working condition, enhance
The reliability of equipment.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model
Utility model, all any modification, equivalent substitution, improvement and etc. within the principle of the utility model, done should be included in this
Within the protection scope of utility model.
Claims (8)
1. a kind of voltage follower circuit for ore machine apparatus, which is characterized in that including voltage input end, voltage output end, pressure
The input terminal of difference control circuit and feedback control circuit, the pressure difference control circuit is separately connected voltage input end and voltage is defeated
Outlet, one end of the feedback control circuit are connected with the output end of the pressure difference control circuit, and it is defeated that the other end is connected to voltage
Enter between end and voltage output end；
The pressure difference control circuit is used to determine voltage difference between voltage output end and voltage input end, and defeated according to voltage
Enter end input voltage and the voltage difference, obtain feedback voltage；
The feedback control circuit is used to carry out feedback adjustment according to output voltage of the feedback voltage to voltage output end.
2. a kind of voltage follower circuit for ore machine apparatus as described in claim 1, which is characterized in that the pressure difference control
Circuit includes concatenated first resistor and second resistance, is in series with PNP type triode between the first resistor and second resistance,
The base stage of the PNP type triode is connected with the voltage input end.
3. a kind of voltage follower circuit for ore machine apparatus as claimed in claim 2, which is characterized in that the feedback control
Circuit includes electric pressure converter and inductance, and the inductance is arranged between voltage input end and voltage output end, and the voltage turns
One end of parallel operation is connected between voltage input end and inductance, and the other end is connected between voltage output end and inductance.
4. a kind of voltage follower circuit for ore machine apparatus as claimed in claim 3, which is characterized in that the voltage follow
Circuit further includes filter circuit, and the filter circuit is for filtering and burning voltage, including diode and the first filter capacitor, institute
It states diode to be connected between inductance and voltage output end, first filter capacitor is connected to the two of the pressure difference control circuit
End.
5. a kind of voltage follower circuit for ore machine apparatus as claimed in claim 2, which is characterized in that the first resistor
It is variable resistance with second resistance.
6. a kind of voltage follower circuit for ore machine apparatus as claimed in claim 3, which is characterized in that the positive-negative-positive three
The collector of pole pipe is connected with the electric pressure converter.
7. a kind of voltage follower circuit for ore machine apparatus as claimed in claim 3, which is characterized in that the voltage conversion
Device is DC-DC converter.
8. a kind of voltage follower circuit for ore machine apparatus as described in claim 1, which is characterized in that the voltage input
End is connected with 3rd resistor and the second filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986134.5U CN208937996U (en) | 2018-11-29 | 2018-11-29 | A kind of voltage follower circuit for ore machine apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986134.5U CN208937996U (en) | 2018-11-29 | 2018-11-29 | A kind of voltage follower circuit for ore machine apparatus |
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| CN208937996U true CN208937996U (en) | 2019-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109240406A (en) * | 2018-11-29 | 2019-01-18 | 浙江亿邦通信科技有限公司 | A kind of voltage follower circuit for ore machine apparatus |
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2018
- 2018-11-29 CN CN201821986134.5U patent/CN208937996U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109240406A (en) * | 2018-11-29 | 2019-01-18 | 浙江亿邦通信科技有限公司 | A kind of voltage follower circuit for ore machine apparatus |
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