CN110323938A - Power supply voltage following device and computing equipment - Google Patents
Power supply voltage following device and computing equipment Download PDFInfo
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- CN110323938A CN110323938A CN201910719263.0A CN201910719263A CN110323938A CN 110323938 A CN110323938 A CN 110323938A CN 201910719263 A CN201910719263 A CN 201910719263A CN 110323938 A CN110323938 A CN 110323938A
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- 230000005611 electricity Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 16
- 238000005070 sampling Methods 0.000 description 12
- 230000003321 amplification Effects 0.000 description 11
- 238000003199 nucleic acid amplification method Methods 0.000 description 11
- 239000003381 stabilizer Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
Abstract
The invention provides a power supply voltage following device and a computing device; wherein the power supply voltage following device includes: the circuit comprises a resistor Ra, a resistor Rb, a resistor Rc, a resistor Re, a resistor Rf and a PNP triode; the resistor Ra and the resistor Rb are connected in series, the resistor Re and the resistor Rf are connected in series, the resistor Rc is connected with the common connection end of the resistor Ra and the resistor Rb, the base electrode of the PNP triode is connected with the common connection end of the resistor Re and the resistor Rf, and the emitting electrode of the PNP triode is connected with the resistor Re. The power supply voltage following device and the computing equipment reduce the cost and the realization difficulty and are more flexible to use.
Description
Technical field
The invention belongs to computing technique fields, and in particular to a kind of supply voltage following device and calculate equipment.
Background technique
Currently, calculate equipment (such as bit coin mine machine) application in, calculate equipment core (Core) input voltage need with
Calculate equipment working condition, working frequency and operating ambient temperature etc. it is different and change, and calculate some needed for equipment
The core input voltage that equipment was wanted and calculated to other power supplys keeps certain and follows relationship, auxiliary when preventing core input voltage from changing
It helps the voltage difference of supply voltage and core input voltage excessive or too small, to protect circuit, calculating equipment is made continually and steadily to work.
As shown in Figure 1, existing supply voltage following device follows scheme frequently with two-stage, power supply is first boosted to some
Higher than the voltage value for being followed output voltage, this voltage is the low-dropout regulator with reference to ground using to be followed output voltage
(LDO), voltage is followed by LDO output.
As it can be seen that existing scheme needs to increase this level-one of LDO, to achieve the purpose that voltage follow, cost be will increase, and defeated
Voltage capability is limited to the performance of LDO out.In addition, can be only applied to booster circuit, that is, follow output voltage defeated greater than being followed
Voltage out.
Summary of the invention
(1) technical problems to be solved
The present invention provides a kind of supply voltage following device and equipment is calculated, it is set forth above at least partly to solve
Technical problem.
(2) technical solution
According to an aspect of the invention, there is provided a kind of supply voltage following device, comprising: resistance Ra, resistance Rb, electricity
Hinder Rc, resistance Re, resistance Rf and PNP triode；
Wherein, the resistance Ra and resistance Rb is connected in series, and the resistance Re and resistance Rf are connected in series, the resistance Rc
It is connect with the common connection end of the resistance Ra and resistance Rb, the base stage of the PNP triode and the resistance Re and resistance Rf
Common connection end connection, the emitter of the PNP triode connect with the resistance Re.
In some embodiments, the supply voltage following device further include: power supply chip internal circuit, the power supply
Chip internal circuits include PWM controller and comparator；Wherein, the PWM controller is connect with the output end of the comparator,
The homophase input of the comparator terminates reference voltage Vref, the voltage prison of the anti-phase input termination power supply chip of the comparator
Keyholed back plate foot FB.
In some embodiments, the common connection end of the resistance Rc, resistance Ra and resistance Rb and the power supply chip
The FB connection of voltage monitoring pin.
In some embodiments, the supply voltage following device further include: power supply chip external circuit, the power supply
The first end of chip exterior circuit with the PWM output pin SW of the power supply chip for connecting, and second end is for connecing input electricity
Press Vin, the input voltage vin=VIt is followed voltage, third end is for meeting output voltage Vout, the output voltage Vout=
VFollow output voltage。
In some embodiments, the collector of the PNP triode is connect with the resistance Rc.
In some embodiments, the supply voltage following device further include: NPN triode and resistance Rd, the NPN
The base stage of triode is connect with the first end of the resistance Rd, the emitter ground connection of the NPN triode, the NPN triode
Collector connect with the resistance Rc, the collector of the PNP triode is connect with the second end of the resistance Rd.
In some embodiments, the supply voltage following device further include: diode, the diode anode with
The resistance Rf connection.
In some embodiments, the voltage of the PNP triode emitter is VFollow output voltage, the first end of the resistance Ra
Voltage be VFollow output voltage, the second end of the resistance Ra connect with the first end of the resistance Rb, the second end of the resistance Rb
Ground connection；The first end of the resistance Re is connect with the emitter of the PNP triode, the second end of the resistance Re and the electricity
The base stage connection of the first end and the PNP triode of Rf is hindered, the second end of the resistance Rf and the anode of the diode connect
It connects, the voltage of the cathode of the diode is VIt is followed voltage, the first end of the resistance Rc is total to the resistance Ra's and resistance Rb
It is connected with connecting pin, the second end of the resistance Rc is connect with the collector of the PNP triode.
In some embodiments, the voltage of the emitter of the PNP triode is VIt is followed voltage, the first end of the resistance Ra
Voltage be VFollow output voltage, the second end of the resistance Ra connect with the first end of the resistance Rb, the second end of the resistance Rb
Ground connection；The first end of the resistance Re is connect with the emitter of the PNP triode, the second end of the resistance Re and the electricity
The base stage connection of the first end and the PNP triode of Rf is hindered, the second end of the resistance Rf and the anode of the diode connect
It connects, the voltage of the cathode of the diode is VFollow output voltage；The first end of the resistance Rc is total to the resistance Ra's and resistance Rb
It is connected with connecting pin, the second end of the resistance Rc is connect with the collector of the NPN triode, the hair of the NPN triode
Emitter grounding.
According to another aspect of the present invention, a kind of calculating equipment is provided comprising the supply voltage follows dress
It sets.
(3) beneficial effect
It can be seen from the above technical proposal that supply voltage following device of the present invention and calculating equipment and at least having and following have
One of beneficial effect:
(1) it is followed by increasing the negative feedback control loop including comparator on FB pin to reach output voltage
Purpose, reduce costs and realize difficulty, use is more flexible.
(2) characteristic for utilizing triode, by sampling resistor and compares amplifying circuit and integrates realization voltage follow, drops
Low cost and realize difficulty, use is more flexible.
Detailed description of the invention
Fig. 1 is existing power supply voltage follow apparatus structure schematic diagram.
Fig. 2 is the mount structure schematic diagram of power supply chip of the present invention.
Fig. 3 is first embodiment negative feedback control loop structural schematic diagram according to the present invention.
Fig. 4 is first embodiment supply voltage following device structural schematic diagram according to the present invention.
Fig. 5 is second embodiment negative feedback control loop structural schematic diagram according to the present invention.
Fig. 6 is second embodiment supply voltage following device structural schematic diagram according to the present invention.
Fig. 7 is 3rd embodiment negative feedback control loop structural schematic diagram according to the present invention.
Fig. 8 is 3rd embodiment supply voltage following device structural schematic diagram according to the present invention.
Fig. 9 is fourth embodiment negative feedback control loop structural schematic diagram according to the present invention.
Figure 10 is fourth embodiment supply voltage following device structural schematic diagram according to the present invention.
Figure 11 is the 5th embodiment sampling resistor according to the present invention and compares amplification circuit structural schematic diagram.
Figure 12 is sixth embodiment sampling resistor according to the present invention and compares amplification circuit structural schematic diagram.
Figure 13 is the 7th embodiment sampling resistor according to the present invention and compares amplification circuit structural schematic diagram.
Figure 14 is the 7th embodiment supply voltage following device structural schematic diagram according to the present invention.
Figure 15 is the 8th embodiment sampling resistor according to the present invention and compares amplification circuit structural schematic diagram.
Figure 16 is the 8th embodiment supply voltage following device structural schematic diagram according to the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
For ease of understanding, the mount structure of power supply chip is first simply introduced herein.
In general, as shown in Fig. 2, the power supply chip includes multiple pins, wherein VIN is input power, and CTRL is chip
Enable pin, COMP are compensation pins, and SW is PWM output pin, and FB is voltage monitoring pin.Technical solution of the present invention is exactly benefit
That electric power output voltage and other voltages are realized with the FB pin of power supply chip follows function.
The present invention provides a kind of supply voltage following devices, compared to existing power supply voltage follow device, present invention electricity
Source voltage follow device reduces costs and realizes difficulty, using more flexible, it can be achieved that output voltage is followed to be higher or lower than
The supply voltage for being followed voltage follows, i.e. VFollow output voltage-VIt is followed voltage=definite value or VIt is followed voltage-VFollow output voltage=definite value.
First embodiment
In the first embodiment, as shown in Figure 3-4, the supply voltage following device includes negative feedback control loop, electricity
Source chip internal circuit and power supply chip external circuit.
Wherein, the negative feedback control loop includes resistance Ra, resistance Rb, resistance Rc and first comparator；The resistance
Ra and resistance Rb is connected in series, and the first end of the resistance Rc is connect with the output end of the first comparator, the resistance Rc
Second end connect with the common connection end of the resistance Ra and resistance Rb, the voltage of the first end of the resistance Ra is
VFollow output voltage, the second end of the resistance Ra connect with the first end of the resistance Rb, the second end ground connection of the resistance Rb；Institute
The voltage for stating the non-inverting input terminal of first comparator is VFollow output voltage, the voltage of the inverting input terminal of the first comparator is
VIt is followed voltage+ΔV；Wherein, Δ V indicates VFollow output voltageWith VIt is followed voltageBetween difference.
The power supply chip internal circuit includes PWM controller and the second comparator；The PWM controller and described second
The output end of comparator connects, and the homophase input of second comparator terminates reference voltage Vref, second comparator
The voltage monitoring pin FB of anti-phase input termination power supply chip.
The first end of the power supply chip external circuit is used to connect with the PWM output pin SW of the power supply chip, the
Two ends are for meeting input voltage vin, the input voltage vin=VIt is followed voltage, third end is used to meet output voltage Vout, described defeated
Voltage Vout=V outFollow output voltage。
Resistance Rc, the resistance Ra of the negative feedback control loop and the common connection end of resistance Rb and the power supply chip
The FB connection of voltage monitoring pin.
The present embodiment voltage following principle is described in detail below, please continue to refer to shown in Fig. 3-4:
VFollow output voltage> VIt is followed voltageMode: one comparator of increase before FB pin, i.e., the described first comparator, when
VFollow output voltage> VIt is followed voltageWhen+Δ V (Δ V indicates the difference for following output voltage and being followed between output voltage), described first
Comparator output is high level, is powered by Re (Rc is current-limiting resistance, plays partial pressure) to FB, so as to cause voltage V at FBFB
Higher than the voltage Vref in the power supply chip, pressure makes PWM controller export low level, to make VFollow output voltageOutput level
It reduces, until VFollow auxiliary voltage out=VIt is followed voltage+ΔV.Work as VFollow output voltage< VIt is followed voltageWhen+Δ V, the first comparator output is low electricity
It is flat, electricity is inhaled from FB by Rc (Rc is current-limiting resistance, plays partial pressure), so as to cause voltage V at FBFBLower than the power supply chip
Interior voltage Vref, pressure makes PWM controller export high level, to make VFollow output voltageOutput level increases, until VFollow output voltage
=VIt is followed voltage+ΔV。
Second embodiment
In a second embodiment, as seen in figs. 5-6, the supply voltage following device includes negative feedback control loop, electricity
Source chip internal circuit and power supply chip external circuit.
Wherein, the negative feedback control loop includes resistance Ra, resistance Rb, resistance Re and first comparator；The resistance
Ra and resistance Rb is connected in series, and the first end of the resistance Re is connect with the output end of the first comparator, the resistance Rc
Second end connect with the common connection end of the resistance Ra and resistance Rb；The voltage of the first end of the resistance Ra is
VFollow output voltage, the second end of the resistance Ra connect with the first end of the resistance Rb, the second end ground connection of the resistance Rb；Institute
The voltage for stating the non-inverting input terminal of first comparator is VFollow output voltage, the voltage of the inverting input terminal of the first comparator is
VIt is followed voltage-ΔV；Wherein, Δ V indicates VFollow output voltageWith VIt is followed voltageBetween difference.
The power supply chip internal circuit includes PWM controller and the second comparator；The PWM controller and described second
The output end of comparator connects, and the homophase input of second comparator terminates reference voltage Vref, second comparator
The voltage monitoring pin FB of anti-phase input termination power supply chip；
The first end of the power supply chip external circuit is used to connect with the PWM output pin SW of the power supply chip, the
Two ends are for meeting input voltage vin, the input voltage vin=VIt is followed voltage, third end is used to meet output voltage Vout, described defeated
Voltage Vout=V outFollow output voltage。
Resistance Rc, the resistance Ra of the negative feedback control loop and the common connection end of resistance Rb and the power supply chip
The FB connection of voltage monitoring pin.
The present embodiment voltage following principle is described in detail below, please continue to refer to shown in Fig. 5-6:
VFollow output voltage< VIt is followed voltageMode: increase a comparator before FB pin, work as VFollow output voltage> VIt is followed voltage-△V
When (△ V indicate follow output voltage and be followed between output voltage difference), the first comparator output is high level,
It is powered by Rc (Rc is current-limiting resistance, plays partial pressure) to FB, so as to cause voltage V at FBFBHigher than in the power supply chip
Voltage Vref, pressure make PWM controller export low level, to make VFollow output voltageOutput level reduces, until VFollow output voltage=
VIt is followed voltage-ΔV.Work as VFollow output voltage< VIt is followed voltageWhen Δ V, the first comparator output is low level, and by Re, (Rc is current limliting
Resistance plays partial pressure) electricity is inhaled from FB, so as to cause voltage V at FBFBLower than the voltage Vref in the power supply chip, force
PWM controller is set to export high level, to make VFollow output voltageOutput level increases, until VFollow output voltage=VIt is followed voltage-ΔV。
3rd embodiment
As Figure 7-8, on the basis of first embodiment, the present embodiment supply voltage following device further comprises string
Join the resistance Rd and voltage-stabiliser tube of connection.Wherein, the resistance Rd is connected to the non-inverting input terminal and reverse phase of the first comparator
Between input terminal, the voltage-stabiliser tube is connect with the inverting input terminal of the first comparator.Specifically, the first of the resistance Rd
End is connect with the non-inverting input terminal of the first comparator, the anode and described first of the second end of the Rd and the voltage-stabiliser tube
The inverting input terminal of comparator connects, and the voltage of the cathode of the voltage-stabiliser tube is VIt is followed voltage, the electricity of the first end of the resistance Rd
The voltage of the non-inverting input terminal of pressure and the first comparator is VFollow output voltage, the electricity of the inverting input terminal of the first comparator
Pressure is VIt is followed voltage+ΔV.Work as VFollow output voltage> VIt is followed voltageWhen+Δ V, the electric current for flowing through Rd just gives birth to voltage, to make comparison amplifier
Work.
Fourth embodiment
As shown in figs. 9-10, on the basis of second embodiment, the present embodiment supply voltage following device further comprises
The resistance Rd and voltage-stabiliser tube of series connection；Wherein, the resistance Rd is connected to the non-inverting input terminal of the first comparator and anti-
Between phase input terminal, the voltage-stabiliser tube is connect with the inverting input terminal of the first comparator.Specifically, the of the resistance Rd
One end is connect with the non-inverting input terminal of the first comparator, the cathode of the second end of the Rd and the voltage-stabiliser tube and described the
The inverting input terminal of one comparator connects, and the voltage of the anode of the voltage-stabiliser tube is VIt is followed voltage, the first end of the resistance Rd
The voltage of the non-inverting input terminal of voltage and the first comparator is VFollow output voltage, the inverting input terminal of the first comparator
Voltage be VIt is followed voltage-ΔV.When V follows output voltage < V to be followed voltage-Δ V, the electric current for flowing through Rd just gives birth to voltage, from
And comparison amplifier is made to work.
To sum up, aforementioned first to fourth embodiment is using one negative feedback control including comparator of increase on FB pin
Circuit achievees the purpose that output voltage follows.
5th embodiment
In the 5th embodiment, as shown in figure 11, the supply voltage following device includes: sampling resistor and compares amplification
Integrated circuit, power supply chip internal circuit and power supply chip external circuit.
Wherein, the sampling resistor and compare amplification circuit include: resistance Ra, resistance Rb, resistance Rc, resistance Re,
Resistance Rf and PNP triode；The resistance Ra and resistance Rb is connected in series, and the resistance Re and resistance Rf are connected in series, described
The first end of resistance Rc is connect with the common connection end of the resistance Ra and resistance Rb, the base stage of the PNP triode with it is described
Resistance Re is connected with the common connection end of resistance Rf, and the collector of the PNP triode is connect with the second end of the resistance Rc,
The emitter of the PNP triode is connect with the first end of the resistance Re, the second end of the resistance Re and the resistance Rf
Connection.
The power supply chip internal circuit includes PWM controller and comparator；Wherein, the PWM controller and the ratio
Output end compared with device connects, and the homophase input of the comparator terminates reference voltage Vref, the inverting input terminal of the comparator
Meet the voltage monitoring pin FB of power supply chip.
The voltage monitoring pin FB of the common connection end of the resistance Rc, resistance Ra and resistance Rb and the power supply chip connects
It connects.
The first end of the power supply chip external circuit is used to connect with the PWM output pin SW of the power supply chip, the
Two ends are for meeting input voltage vin, the input voltage vin=VIt is followed voltage, third end is used to meet output voltage Vout, described defeated
Voltage Vout=V outFollow output voltage。
The present embodiment voltage following principle is described in detail below, please continue to refer to shown in Figure 11:
The resistance Re is connected in parallel on the base stage and emitter of the PNP triode, and the conducting voltage of Vbe is generally -0.7V,
To work as the voltage V at the both ends resistance ReReWhen < -0.7V, the triode ON, VFollow output voltageIt can make V by resistance RcFB>
Vref, pressure makes PWM controller export low level, to make VFollow output voltageOutput level reduces, until the voltage V at the both ends ReReGreatly
In -0.7V.Because dynatron performance Ice > > Ibe, the electric current for flowing through Rf are approximately equal to the electric current for flowing through Re, VRf=Rf/Re*
VRe, so working as VReWhen=- 0.7V, VRfValue determined by the resistance value of Re and Rf, VFollow output voltage=VIt is followed voltage+VRe+VRf, so Δ V
=0.7V (1+Rf/Re).
Sixth embodiment
In the sixth embodiment, as shown in figure 12, the supply voltage following device includes: sampling resistor and compares amplification
Integrated circuit, power supply chip internal circuit and power supply chip external circuit.
Wherein, the sampling resistor and compare amplification circuit include: resistance Ra, resistance Rb, resistance Rc, resistance Re,
Resistance Rd, resistance Rf, PNP triode and NPN triode；The first termination V of the resistance RaFollow output voltage, the of the resistance Ra
Two ends are connected with the first end of resistance Rb, the second end ground connection of the resistance Rb；The first termination V of the resistance ReIt is followed voltage, institute
The second end for stating resistance Re is connected with the first end of resistance Rf, the second termination V of the resistance RfFollow output voltage；The resistance Rc's
First end is connect with the common connection end of the resistance Ra and resistance Rb, the collector of the NPN triode and the resistance Rc
Second end connection, the base stage of the NPN triode connect with the first end of the resistance Rd, the transmitting of the NPN triode
Pole ground connection；The collector of the PNP triode is connect with the second end of the Rd, the emitter and resistance of the PNP triode
The first end of Re connects, and the base stage of the PNP triode is connect with the first end of the second end of the resistance Re and resistance Rf.
The power supply chip internal circuit includes PWM controller and comparator；Wherein, the PWM controller and the ratio
Output end compared with device connects, and the homophase input of the comparator terminates reference voltage Vref, the inverting input terminal of the comparator
Meet the voltage monitoring pin FB of power supply chip.
The voltage monitoring pin FB of the common connection end of the resistance Rc, resistance Ra and resistance Rb and the power supply chip connects
It connects.
The first end of the power supply chip external circuit is used to connect with the PWM output pin SW of the power supply chip, the
Two ends are for meeting input voltage vin, the input voltage vin=VIt is followed voltage, third end is used to meet output voltage Vout, described defeated
Voltage Vout=V outFollow output voltage。
The present embodiment voltage following principle is described in detail below, please continue to refer to shown in Figure 12:
The resistance Re is connected in parallel on the base stage and emitter of PNP triode, and the conducting voltage of Vbe is generally -0.7V, thus
As the voltage V at the both ends resistance ReReWhen < -0.7V, the triode ON, VIt is followed voltageResistance Rd can be passed through, open tri- pole NPN
Pipe leads to V so that FB be made to pull down to ground by RcFB< Vref, pressure makes PWM controller export high level, to make
VFollow output voltageOutput level increases, until the voltage V at the both ends ReReGreater than -0.7V.Because dynatron performance Ice > > Ibe, flows through
The electric current of Rf is approximately equal to the electric current for flowing through Re, VRf=Rf/Re*VRe, so working as VReWhen=- 0.7V, VRfValue by Re and Rf resistance
Value decision, VFollow output voltage=VIt is followed voltage-(VRe+VRf), so Δ V=0.7V (1+Rf/Re).
7th embodiment
On the basis of five embodiments, the sampling resistor and compares and can also increase diode in amplification circuit
Etc. the fixed circuit of conducting voltages.As illustrated in figs. 13-14, the anode of the diode is connect with the second end of the resistance Rf,
The cathode of the diode meets VIt is followed voltage。VFollow output voltage=VIt is followed voltage+VRe+VRf+VDiode conduction voltage drop, so Δ V=0.7V (1+Rf/
Re)+VDiode conduction voltage drop。
8th embodiment
On the basis of sixth embodiment, the sampling resistor and compares amplification circuit and can also increase diode etc.
The fixed circuit of conducting voltage.As shown in figures 15-16, the anode of the diode is connect with the second end of the resistance Rf, institute
The cathode for stating diode meets VFollow output voltage。VFollow output voltage=VIt is followed voltage-(VRe+VRf+VDiode conduction voltage drop)；So Δ V=0.7V (1+Rf/
Re)+VDiode conduction voltage drop。
To sum up, the embodiment of the present invention five by sampling resistor and compares amplification electricity using the characteristic of triode to embodiment eight
Road integrates, and reduces cost and realizes difficulty, use is more flexible.
So far, attached drawing is had been combined to the present invention have been described in detail.According to above description, those skilled in the art are answered
When having clear understanding to the present invention.
It should be noted that in attached drawing or specification text, the implementation for not being painted or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and not only limiting
Various specific structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can carry out simply more it
Change or replaces.
Certainly, according to actual needs, supply voltage following device of the present invention and calculating equipment can also include others portion
Point, due to unrelated with innovation of the invention, details are not described herein again.
Similarly, it should be understood that in order to simplify the present invention and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the invention should not be construed to reflect an intention that i.e. required guarantor
Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, inventive aspect is all features for the single embodiment invented less than front.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as a separate embodiment of the present invention.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
It combines to all features invented in this specification (including the accompanying claims, abstract and drawings) and appointing such as the invention
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) in invent each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) are some or complete in relevant device according to an embodiment of the present invention to realize
The some or all functions of portion's component.The present invention be also implemented as a part for executing method as described herein or
The device or device program (for example, computer program and computer program product) of person's whole.Such realization is of the invention
Program can store on a computer-readable medium, or may be in the form of one or more signals.Such signal
It can be downloaded from an internet website to obtain, be perhaps provided on the carrier signal or be provided in any other form.
Furthermore the word of ordinal number such as " first ", " second " used in specification and claim etc., to modify phase
The element answered, itself simultaneously unexpectedly contains and represents the element and have any ordinal number, does not also represent a certain element and another element
Sequence sequentially or in manufacturing method, the use of those ordinal numbers are only used to enable the element and another with certain name
Element with identical name can make clear differentiation.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of supply voltage following device characterized by comprising resistance Ra, resistance Rb, resistance Rc, resistance Re, resistance Rf
And PNP triode；
Wherein, the resistance Ra and resistance Rb is connected in series, and the resistance Re and resistance Rf are connected in series, the resistance Rc and institute
It states resistance Ra to connect with the common connection end of resistance Rb, the base stage of the PNP triode is total to the resistance Re's and resistance Rf
It is connected with connecting pin, the emitter of the PNP triode is connect with the resistance Re.
2. supply voltage following device according to claim 1, which is characterized in that further include: power supply chip internal circuit,
The power supply chip internal circuit includes PWM controller and comparator；Wherein, the PWM controller and the comparator is defeated
Outlet connection, the homophase input of the comparator terminate reference voltage Vref, and the anti-phase input of the comparator terminates power supply core
The voltage monitoring pin FB of piece.
3. supply voltage following device according to claim 2, which is characterized in that the resistance Rc, resistance Ra and resistance
The common connection end of Rb is connect with the voltage monitoring pin FB of the power supply chip.
4. supply voltage following device according to claim 3, which is characterized in that further include: power supply chip external circuit,
For connecting with the PWM output pin SW of the power supply chip, second end is used for the first end of the power supply chip external circuit
Meet input voltage vin, the input voltage vin=VIt is followed voltage, third end is for connecing output voltage Vout, the output voltage
Vout=VFollow output voltage。
5. supply voltage following device according to claim 1, which is characterized in that the collector of the PNP triode with
The resistance Rc connection.
6. supply voltage following device according to claim 1, which is characterized in that further include: NPN triode and resistance
Rd, the base stage of the NPN triode are connect with the first end of the resistance Rd, the emitter ground connection of the NPN triode, described
The collector of NPN triode is connect with the resistance Rc, and the second end of the collector of the PNP triode and the resistance Rd connect
It connects.
7. supply voltage following device according to claim 5 or 6, which is characterized in that further include: diode, described two
The anode of pole pipe is connect with the resistance Rf.
8. supply voltage following device according to claim 7, which is characterized in that the electricity of the PNP triode emitter
Pressure is VFollow output voltage, the voltage of the first end of the resistance Ra is VFollow output voltage, the second end of the resistance Ra and the resistance Rb
First end connection, the resistance Rb second end ground connection；The first end of the resistance Re and the emitter of the PNP triode
Connection, the second end of the resistance Re are connect with the base stage of the first end of the resistance Rf and the PNP triode, the resistance
The second end of Rf is connect with the anode of the diode, and the voltage of the cathode of the diode is VIt is followed voltage, the resistance Rc's
First end is connect with the common connection end of the resistance Ra and resistance Rb, the second end and the PNP triode of the resistance Rc
Collector connection.
9. supply voltage following device according to claim 7, which is characterized in that the emitter of the PNP triode
Voltage is VIt is followed voltage, the voltage of the first end of the resistance Ra is VFollow output voltage, the second end of the resistance Ra and the resistance Rb
First end connection, the resistance Rb second end ground connection；The first end of the resistance Re and the emitter of the PNP triode
Connection, the second end of the resistance Re are connect with the base stage of the first end of the resistance Rf and the PNP triode, the resistance
The second end of Rf is connect with the anode of the diode, and the voltage of the cathode of the diode is VFollow output voltage；The resistance Rc's
First end is connect with the common connection end of the resistance Ra and resistance Rb, the second end and the NPN triode of the resistance Rc
Collector connection, the NPN triode emitter ground connection.
10. a kind of calculating equipment, which is characterized in that follow dress including supply voltage as claimed in any one of claims 1-9 wherein
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719263.0A CN110323938A (en) | 2019-08-05 | 2019-08-05 | Power supply voltage following device and computing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719263.0A CN110323938A (en) | 2019-08-05 | 2019-08-05 | Power supply voltage following device and computing equipment |
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| CN110323938A true CN110323938A (en) | 2019-10-11 |
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ID=68125405
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| CN201910719263.0A Pending CN110323938A (en) | 2019-08-05 | 2019-08-05 | Power supply voltage following device and computing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323939A (en) * | 2019-08-05 | 2019-10-11 | 杭州嘉楠耘智信息科技有限公司 | Power supply voltage following device and computing equipment |
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