CN205563342U - Voltage output's regulating circuit - Google Patents
Voltage output's regulating circuit Download PDFInfo
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- CN205563342U CN205563342U CN201620303264.9U CN201620303264U CN205563342U CN 205563342 U CN205563342 U CN 205563342U CN 201620303264 U CN201620303264 U CN 201620303264U CN 205563342 U CN205563342 U CN 205563342U
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Abstract
The utility model discloses a voltage output's regulating circuit. Wherein, this regulating circuit includes: the comparator is connected with first resistor string and the crosstalk of second resistance respectively for whether the first resistive voltage of more first resistor string is greater than the second resistive voltage of second resistor string, logic controller is connected with first resistor string and comparator electricity respectively for magnitude of voltage size between control more first resistor string of comparator ergodic and the second resistor string, the main part module is connected with the logic controller electricity for the storage is when first resistive voltage is greater than the second resistive voltage, and the sign indicating number that corresponds is worth, and takes notes the output voltage that the sign indicating number value corresponds. The utility model provides an owing to only can lead to comparing the technical problem of the unable compatibility of circuit structure with current resistive voltage divider through accomplish the regulation to output numerical value under communication mode among the prior art.
Description
Technical field
This utility model relates to electrical technology application, the regulation circuit exported in particular to a kind of voltage.
Background technology
Along with the extensive utilization of digital interface technology, a lot of products use digital interface to adjust system output numerical value.As
What design compatible analog and digital regulated two kinds of pressure regulation scheme, becomes nowadays problem demanding prompt solution.
Fig. 1 is the structural representation of communication bus chip architecture in prior art, as it is shown in figure 1, in heavy black line district
Being traditional to have I2C communication bus chip architecture in territory, client is by two bus B us regulation x+1 of SDA/SCL
CODE [x:0] numerical value of bit.This CODE value input main body module Mainblock, according to different CODE [x:0],
User can obtain the output numerical value that output voltage VO UT is different.
From the foregoing, it will be observed that this scheme can only complete the regulation to output numerical value, I2C communication modes under I2C communication modes
Needing client to find the slave address of chip, and need to write data data in corresponding registers, these needs take
The communication interface of I2C, but this process is the most loaded down with trivial details, it is impossible to meet the efficient requirement that data process.
For above-mentioned due to prior art is only capable of by complete under communication modes to output numerical value regulation, cause with
Existing electric resistance partial pressure cannot be compatible than circuit structure problem, effective solution is the most not yet proposed.
Utility model content
This utility model embodiment provides the regulation circuit of a kind of voltage output, at least to solve due in prior art
Being only capable of by completing the regulation to output numerical value under communication modes, causing cannot than circuit structure with existing electric resistance partial pressure
Compatible technical problem.
An aspect according to this utility model embodiment, it is provided that the regulation circuit of a kind of voltage output, including: the
One resistance string, the second resistance string, comparator, logic controller and main body module, wherein, comparator, respectively with
Whether one resistance string and the electrical connection of the second resistance string, for comparing the first resistive voltage of the first resistance string more than the second electricity
Second resistive voltage of resistance string；Logic controller, electrically connects with the first resistance string and comparator respectively, is used for controlling ratio
Relatively device traversal compares the magnitude of voltage size between the first resistance string and the second resistance string；Main body module, with logic controller
Electrical connection, for storage when the first resistive voltage is more than the second resistive voltage, corresponding code value, and record code value pair
The output voltage answered.
In this utility model embodiment, use the mode of D/A converting circuit, by comparator, respectively with the first electricity
Whether resistance string and the electrical connection of the second resistance string, for comparing the first resistive voltage of the first resistance string more than the second resistance string
The second resistive voltage；Logic controller, electrically connects with the first resistance string and comparator respectively, is used for controlling comparator
Traversal compares the magnitude of voltage size between the first resistance string and the second resistance string；Main body module, is electrically connected with logic controller
Connect, for storage when the first resistive voltage is more than the second resistive voltage, corresponding code value, and it is corresponding to record code value
Output voltage, has reached to regulate the purpose of output voltage, it is achieved thereby that compatible analog and digital regulated technique effect,
And then solve owing to prior art being only capable of by completing the regulation to output numerical value under communication modes, cause with existing
There is the technical problem that electric resistance partial pressure cannot be compatible than circuit structure.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used for explaining this utility model, is not intended that of the present utility model
Improper restriction.In the accompanying drawings:
Fig. 1 is the structural representation of communication bus chip architecture in prior art；
Fig. 2 is the structural representation of the regulation circuit of the voltage output according to this utility model embodiment；
Fig. 3 is the structural representation of the regulation circuit of a kind of voltage output according to this utility model embodiment；
Fig. 4 is the oscillogram of key node.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that this utility model scheme, real below in conjunction with this utility model
Execute the accompanying drawing in example, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that institute
The embodiment described is only the embodiment of this utility model part rather than whole embodiments.Based on this practicality
Embodiment in novel, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, all should belong to the scope of this utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. are for distinguishing similar object, without being used for describing specific order or precedence.Should manage
Solve the data so used can exchange in the appropriate case, in order to embodiment of the present utility model described herein can
Implement with the order in addition to those here illustrating or describing.Additionally, term " includes " and " having " with
And their any deformation, it is intended that cover non-exclusive comprising, such as, contain series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps or the unit clearly listed, but can include
That the most clearly list or for intrinsic other step of these processes, method, product or equipment or unit.
According to this utility model embodiment, it is provided that the embodiment of the regulation circuit of a kind of voltage output, Fig. 2 is basis
The structural representation of the regulation circuit of the voltage output of this utility model embodiment, as in figure 2 it is shown, this regulation circuit bag
Include: first resistance string the 21, second resistance string 22, comparator 23, logic controller 24 and main body module 25, wherein,
Comparator 23, electrically connects with the first resistance string 21 and the second resistance string 22 respectively, is used for comparing the first resistance string
Whether first resistive voltage of 21 is more than the second resistive voltage of the second resistance string 22；
Logic controller 24, electrically connects with the first resistance string 21 and comparator 23 respectively, is used for controlling comparator 23
Traversal compares the magnitude of voltage size between the first resistance string 21 and the second resistance string 22；
Main body module 25, electrically connects with logic controller 24, for storage when the first resistive voltage is more than the second resistance
During voltage, corresponding code value, and record the output voltage that code value is corresponding.
Concrete, the regulation circuit of the voltage output that the embodiment of the present application provides goes for integrated circuit fields, special
Do not relate to the Circuits System belonging to compatible more existing digital interfaces (such as I2C, SPI, One-wire, GPIO),
Outside in remaining the prior art shown in Fig. 1, main body module 25 is with the attachment structure of communication bus I2C, also provide for out
The resistance detecting circuit being made up of first resistance string the 21, second resistance string 22, comparator 23 and logic controller 24
(Resistor Detection Circuit is called for short RDC), when powering on when, relative to I2C communication, RDC circuit
Have only to hundreds of microsecond.RDC works when, by having used VOUT Pin, when register lock client needs
The when of CODE [x:0] asked, RDC_END signal sets high, and the right to use of VOUT Pin returns to main body module
(main block).No matter client uses RDC circuit or I2C communication, can only select therein in the same time period
One, it is achieved that the circuit compatibility under same framework.
Wherein, the first resistance string 21 and the second resistance string 22, by being connected with comparator 23 respectively, export the first resistance
Voltage and the second resistive voltage, comparator 23 is by judging that the first resistive voltage, whether more than the second resistive voltage, triggers
The logic controller 24 electrically connected with comparator 23, when the first resistive voltage is less than the second resistive voltage, logic control
Device 24 processed controls comparator 23 traversal and compares the magnitude of voltage size between the first resistance string 21 and the second resistance string 22,
During until the first resistive voltage is more than the second resistive voltage, the main body module 25 electrically connected with logic controller 24, deposit
Store up the code value that the first resistive voltage is corresponding more than the second resistive voltage, and record the output voltage that code value is corresponding.
The embodiment of the present application provide voltage output regulation circuit in, by comparator, respectively with the first resistance string and
Whether second resistance string electrical connection, for comparing the first resistive voltage of the first resistance string more than the second of the second resistance string
Resistive voltage；Logic controller, electrically connects with the first resistance string and comparator respectively, is used for controlling comparator traversal ratio
The relatively magnitude of voltage size between the first resistance string and the second resistance string；Main body module, electrically connects with logic controller, uses
In storage when the first resistive voltage is more than the second resistive voltage, corresponding code value, and record the output electricity that code value is corresponding
Pressure, has reached to regulate the purpose of output voltage, it is achieved thereby that compatible analog and digital regulated technique effect, and then
Solve owing to prior art being only capable of by completing the regulation to output numerical value under communication modes, cause and existing electricity
Hinder the technical problem that intrinsic standoff ratio circuit structure cannot be compatible.
Concrete, the regulation circuit of the voltage output that the embodiment of the present application provides is as a example by I2C communication bus chip architecture
Illustrating, Fig. 3 is the structural representation of the regulation circuit of a kind of voltage output according to this utility model embodiment,
As it is shown on figure 3, the regulation circuit that the voltage that the embodiment of the present application provides exports is specific as follows:
Optionally, the regulation circuit of the voltage output that the embodiment of the present application provides includes: manostat, wherein,
Manostat, electrically connects with the first resistance string 21 and the second resistance string 22 respectively, for will the voltage of input by the
One input voltage is converted to the second input voltage, and wherein, the first input voltage is more than the second input voltage.
Further, optionally, manostat includes: low pressure difference linear voltage regulator.
Concrete, as it is shown on figure 3, manostat may include that low pressure difference linear voltage regulator (Low Dropout Regulator,
It is called for short LDO), Fig. 3 is denoted as AUX_LDO.
Optionally, in the resistance number correspondence main body module 25 in the first resistance string 21, the bit number of depositor is joined
Put；Wherein, each resistant series in the first resistance string 21, each resistance all connects one and switchs, and each resistance is corresponding
Switch in parallel access comparator 23.
Concrete, as it is shown on figure 3, the first resistance string 21 can be to have R in Fig. 31To RNThe resistance string of composition, its
In, all there is the respective resistive voltage of correspondence in each resistance, as it is shown on figure 3, R1To RNCorresponding resistive voltage is
VR1To VRN, wherein N is natural number, N >=1, in Fig. 3, each resistance is all in series with a switch, i.e. figure
CS in 31To CS(N), by Guan Bi CS1To CS(N)In any one switch obtain being made up of M resistance
Resistance, M is natural number, M >=1, the electricity after wherein the voltage of input comparator 23 is by this M electric resistance partial pressure
Pressure.
Optionally, the second resistance string 22 includes: the first resistance and the second resistance, the first resistance and the second resistant series,
Wherein, the first resistance and the second resistance obtain the second resistive voltage to the second input voltage dividing potential drop.
Concrete, as it is shown on figure 3, the first resistance and the second resistance can be the R in Fig. 31And R2, by series connection
R1And R2, manostat the second input voltage changed is carried out the VFB that dividing potential drop obtains in Fig. 3, i.e. the application
The second resistive voltage in embodiment.
Optionally, the regulation circuit of the voltage output that the embodiment of the present application provides includes: communication bus, wherein,
Communication bus, electrically connects with main body module 25, is used for when receiving switching command, will be by the first resistance string
21, the first circuit conversion of comparator 23 and logic controller 24 composition is for be made up of communication bus and main body module 25
Second circuit, generate corresponding code value according to second circuit, and according to output voltage corresponding to code value output.
Concrete, as it is shown on figure 3, the communication bus in the embodiment of the present application can for the I2C bus shown in Fig. 3,
Comprise two signals of SCL Yu SDA.When receiving switching command, the switch of the VOUT in Fig. 3 switches to main
At module 25, I2C circuit (that is, in the embodiment of the present application being made up of main body module 25 and I2C bus
Two circuit) generate corresponding code value, i.e. CODE [X:0], and export corresponding output voltage according to this CODE [X:0]
VOUT。
As it is shown on figure 3, when switching CS1 conducting Guan Bi when, VR1 with VFB compares, now
CODE [1:0]=00, if VR1 < VFB, then the output CMP_OUT=0 of comparator 23, now CODE
Numerical value increase by one become CODE [1:0]=01, then CS2 replace CS1 switch Guan Bi conducting.Until VRX> VFB,
The output CMP_OUT=1 of comparator 23, then now control logic device 24 and lock current CODE numerical value, with
Time put RDC_END signal for height.If this signal is high, it is meant that compares end, returns VOUT Pin's
The right to use is to main body module 25, and has locked current CODE numerical value, the VOUT that this CODE numerical value is determined
Output be also required for client, this CODE numerical value is always maintained at effectively until lower electricity electrification reset again.
To sum up, Fig. 4 is the oscillogram of key node.As shown in Figure 4, the waveform in Fig. 4 is it can be seen that pass through to select
Different divider resistances obtains VFB value, and the when of only working as VREF > VFB, RDC_END signal just can set high,
It is locked by the Code numerical value required for client.
The regulation circuit of the voltage output that the embodiment of the present application provides, can be led to by existing I2C digital interface
News, can also form with by first resistance string the 21, second resistance string 22, comparator 23 and logic controller 24 simultaneously
Resistance detecting circuit RDC regulate output valve by configuring resistance ratio, it is achieved that compatible between circuit.
Above-mentioned this utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these
Improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (6)
1. the regulation circuit of voltage output, it is characterised in that including: the first resistance string, the second resistance string, compare
Device, logic controller and main body module, wherein,
Described comparator, electrically connects with described first resistance string and described second resistance string respectively, is used for comparing institute
Whether the first resistive voltage stating the first resistance string is more than the second resistive voltage of described second resistance string；
Described logic controller, electrically connects with described first resistance string and described comparator respectively, is used for controlling institute
State comparator and travel through the magnitude of voltage size between more described first resistance string and described second resistance string；
Described main body module, electrically connects with described logic controller, big when described first resistive voltage for storage
When described second resistive voltage, corresponding code value, and record the output voltage that described code value is corresponding.
Regulation circuit the most according to claim 1, it is characterised in that described regulation circuit includes: manostat, its
In,
Described manostat, electrically connects with described first resistance string and described second resistance string respectively, for inputting
Voltage be converted to the second input voltage by the first input voltage, wherein, described first input voltage is more than described
Second input voltage.
Regulation circuit the most according to claim 2, it is characterised in that described manostat includes: low pressure difference linearity is steady
Depressor.
Regulation circuit the most according to claim 1, it is characterised in that the resistance number pair in described first resistance string
The bit number of depositor in described main body module is answered to configure；Wherein, each resistance in described first resistance string
Connecting, described each resistance is all connected one and is switched, and the switch in parallel that described each resistance is corresponding accesses described ratio
Relatively device.
Regulation circuit the most according to claim 2, it is characterised in that described second resistance string includes: the first resistance
With the second resistance, described first resistance and described second resistant series, wherein, described first resistance and described the
Two resistance obtain described second resistive voltage to described second input voltage dividing potential drop.
Regulation circuit the most according to claim 1, it is characterised in that described regulation circuit also includes: communication bus,
Wherein,
Described communication bus, electrically connects with described main body module, is used for when receiving switching command, will be by institute
State the first circuit conversion that the first resistance string, described comparator and described logic controller form for be communicated by described
Bus and the second circuit of described main body module composition, generate corresponding code value, and foundation according to described second circuit
The described output voltage that the output of described code value is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620303264.9U CN205563342U (en) | 2016-04-12 | 2016-04-12 | Voltage output's regulating circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620303264.9U CN205563342U (en) | 2016-04-12 | 2016-04-12 | Voltage output's regulating circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105786068A (en) * | 2016-04-12 | 2016-07-20 | 北京集创北方科技股份有限公司 | Voltage output adjusting circuit and method |
| CN109460104A (en) * | 2018-12-03 | 2019-03-12 | 惠科股份有限公司 | Voltage regulating circuit, voltage regulating device and display device |
-
2016
- 2016-04-12 CN CN201620303264.9U patent/CN205563342U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105786068A (en) * | 2016-04-12 | 2016-07-20 | 北京集创北方科技股份有限公司 | Voltage output adjusting circuit and method |
| CN109460104A (en) * | 2018-12-03 | 2019-03-12 | 惠科股份有限公司 | Voltage regulating circuit, voltage regulating device and display device |
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