CN108777550A - Power-supplying circuit - Google Patents
Power-supplying circuit Download PDFInfo
- Publication number
- CN108777550A CN108777550A CN201810983632.2A CN201810983632A CN108777550A CN 108777550 A CN108777550 A CN 108777550A CN 201810983632 A CN201810983632 A CN 201810983632A CN 108777550 A CN108777550 A CN 108777550A
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- CN
- China
- Prior art keywords
- ports
- voltage stabilizing
- stabilizing module
- power
- avdd
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of power-supplying circuit, including adjusting control module, is set between the ports AVEE, the ports AVDD, PWM port and power input port；First Voltage stabilizing module is set between the ports AVEE, the ports AVDD and the adjusting control module；Second Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVDD；Third Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVEE.The design that the present invention passes through the adjusting control module, 7.5V burning voltages required when LCD driving IC burnings can be effectively provided, the required AVDD and AVEE voltages of screen of HD or more resolution ratio can be provided, the driving required VGH and VGL voltages of LCD can be provided, and then effectively raise user experience.
Description
Technical field
The present invention relates to electronic circuit technology field, more particularly to a kind of power-supplying circuit.
Background technology
The advantages that light, thin, power consumption is small due to liquid crystal display (LCD) tool, it is widely used in TV, notes type this electricity
Brain, mobile phone, personal digital assistant etc. modernize information equipment.Currently, liquid crystal display is applied more and more in the market
It is important.In general, liquid crystal display needs a power-supplying circuit to power it, because, it is right in order to improve the usage experience of user
More stringent requirements are proposed for the stability of power-supplying circuit.
It, cannot be by regulation resistance to meet the required burning electricity of LCD during existing power-supplying circuit use
Pressure, AVDD, AVEE, VGH and VGL voltage, further reduced user experience.
Invention content
Based on this, the purpose of the present invention is to provide one kind can be by regulation resistance to meet the required burnings of LCD
The power-supplying circuit of voltage, AVDD, AVEE, VGH and VGL voltage.
A kind of power-supplying circuit, including：
Adjusting control module is set between the ports AVEE, the ports AVDD, PWM port and power input port, the adjusting
Control module is used to control the output voltage of the ports AVEE and the ports AVDD；
First Voltage stabilizing module is set between the ports AVEE, the ports AVDD and the adjusting control module, described
First Voltage stabilizing module is used to stablize the voltage that the adjusting control module is conveyed towards the ports AVEE or the ports AVDD；
Second Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVDD, second Voltage stabilizing module
The voltage conveyed towards the ports AVDD for stablizing first Voltage stabilizing module；
Third Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVEE, the third Voltage stabilizing module
The voltage conveyed towards the ports AVEE for stablizing first Voltage stabilizing module.
Above-mentioned power-supplying circuit can effectively provide LCD drivings IC by the design of the adjusting control module
Required 7.5V burning voltages when burning, it is possible to provide the required AVDD and AVEE voltages of screen of HD or more resolution ratio, it is possible to provide
The required VGH and VGL voltages of LCD are driven, and then effectively raise user experience, pass through first Voltage stabilizing module, institute
The design of the second Voltage stabilizing module and the third Voltage stabilizing module is stated, effectively the voltage transmitted in the power-supplying circuit is risen
Voltage regulation result has been arrived, the stability of the power-supplying circuit structure is improved.
Further, the adjusting control module include the first capacitance, respectively with first capacitance it is concatenated first electricity
Resistance and second resistance and with the concatenated 3rd resistor of the second resistance, the output end of the 3rd resistor and the PWM port
It is electrically connected.
Further, first Voltage stabilizing module includes oscillation chip and inductance coil, the oscillation chip respectively with institute
It states adjusting control module, second Voltage stabilizing module and the third Voltage stabilizing module to be electrically connected, the input of the inductance coil
End is electrically connected with the adjusting control module, and output end is electrically connected with second Voltage stabilizing module.
Further, the oscillation chip is made of AP3012 model chips, and the ports VIN of the oscillation chip
With the power input port be electrically connected, it is described oscillation chip the ports SHDN respectively with the first resistor, described second
Resistance, the 3rd resistor are electrically connected.
Further, second Voltage stabilizing module include the second capacitance, it is steady with second capacitance concatenated first respectively
Press diode and the second zener diode, with concatenated 4th resistance of first zener diode and with the 4th resistance string
The adjustable resistance of connection.
Further, the input terminal of second capacitance and the output end of the inductance coil are electrically connected, described adjustable
The input terminal of resistance with it is described oscillation chip the ports FB be electrically connected, the output end of first zener diode with it is described
The ports AVDD are electrically connected.
Further, third capacitance is equipped between the 4th resistance and the ports AVDD.
Further, the third Voltage stabilizing module include the 5th resistance, with concatenated 4th capacitance of the 5th resistance and
Respectively with the concatenated third zener diode of the 4th capacitance and the 4th zener diode.
Further, the input terminal of the 5th resistance and the ports SW of the oscillation chip are electrically connected.
Further, the 5th capacitance is equipped between the third zener diode and the ports AVEE.
Description of the drawings
Fig. 1 is the electrical block diagram for the power-supplying circuit that first embodiment of the invention provides；
Fig. 2 is the electrical block diagram of the second Voltage stabilizing module in Fig. 1；
Fig. 3 is the electrical block diagram for the power-supplying circuit that second embodiment of the invention provides；
Essential element symbol description
| Power-supplying circuit | 100,100a | Power input port | 101 |
| The ports AVEE | 102 | The ports AVDD | 103 |
| PWM port | 104 | Adjusting control module | 10 |
| First Voltage stabilizing module | 20 | Second Voltage stabilizing module | 30 |
| Third Voltage stabilizing module | 40 | First capacitance | C5 |
| Second capacitance | C4 | Third capacitance | C1 |
| 4th capacitance | C3 | 5th capacitance | C2 |
| First resistor | R3 | Second resistance | R4 |
| 3rd resistor | R5 | 4th resistance | R2 |
| 5th resistance | R1 | Vibrate chip | U1 |
| Inductance coil | L1 | First zener diode | D1 |
| Second zener diode | D2 | Third zener diode | D3 |
| 4th zener diode | D4 | Adjustable resistance | VR1 |
Following specific implementation mode will be further illustrated the present invention in conjunction with above-mentioned attached drawing.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.Several embodiments of the present invention are given in attached drawing.But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein.Make on the contrary, purpose of providing these embodiments is
It is more thorough and comprehensive to the disclosure.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side ", "upper", "lower" and similar statement for illustrative purposes only, do not indicate or imply the indicated device or member
Part must have a particular orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.Term " and or " used herein include the arbitrary of one or more relevant Listed Items and
All combinations.
It please referring to Fig.1 to Fig. 2, first embodiment of the invention provides a kind of power-supplying circuit 100, including：
Adjusting control module 10 is set to the ports AVEE 102, the ports AVDD 103, PWM port 104 and power input port
Between 101, the adjusting control module 10 is used to control the output electricity of the ports AVEE 102 and the ports AVDD 103
Pressure, and then by the design of the adjusting control module 10, user is facilitated to the ports AVEE 102, the ports AVDD
The control of 103 output voltages, improves user experience.
First Voltage stabilizing module 20 is set to the ports AVEE 102, the ports AVDD 103 and the adjusting control module
Between 10, first Voltage stabilizing module 20 is for stablizing the adjusting control module 10 towards ports AVEE 102 or described
The voltage that the ports AVDD 103 convey, by the design of first Voltage stabilizing module 20, to improve the power-supplying circuit 100
The stability of middle voltage transmission.
Second Voltage stabilizing module 30 is set between first Voltage stabilizing module 20 and the ports AVDD 103, and described second is steady
Die block 30 is for stablizing the voltage that first Voltage stabilizing module 20 is conveyed towards the ports AVDD 103；Third Voltage stabilizing module
40, it is set between first Voltage stabilizing module 20 and the ports AVEE 102, the third Voltage stabilizing module 40 is for stablizing institute
State the voltage that the first Voltage stabilizing module 20 is conveyed towards the ports AVEE 102.
The adjusting control module 10 include the first capacitance C5, respectively with the concatenated first resistor R3 of the first capacitance C5
And second resistance R4 and with the concatenated 3rd resistor R5 of the second resistance R4, the output end of the 3rd resistor R5 with it is described
PWM port 104 is electrically connected, specifically, the capacity of the first capacitance C5 is 1uf.
In the present embodiment, first Voltage stabilizing module 20 includes oscillation chip U1 and inductance coil L1, the oscillation chip
U1 is electrically connected with the adjusting control module 10, second Voltage stabilizing module 30 and the third Voltage stabilizing module 40 respectively, institute
The input terminal and the adjusting control module 10 for stating inductance coil L1 are electrically connected, output end and second Voltage stabilizing module, 30 electricity
Property connection, the oscillation chip U1 is made of AP3012 model chips, and the ports VIN for vibrating chip U1 with it is described
Power input port 101 is electrically connected, the ports SHDN of the oscillation chip U1 respectively with the first resistor R3, described second
Resistance R4, the 3rd resistor R5 are electrically connected.
Specifically, the DC/DC translation circuit application systems of AP3012, can work under the voltage conditions of 2.6~16V,
The DC voltage of output is controlled by the divider resistance of feedback end, obtains loading required operating voltage.
The performance parameter of AP3012：Input voltage range：2.6~16V；Switching current：500mA；Overvoltage protection voltage：
29V；Soft-start time：550uS；Feedback detection voltage：1.25V, feedback end input current representative value are 45nA；Output voltage is logical
Cross following formula calculating：VO=1.25* (1+R1/VR1).
Second Voltage stabilizing module 30 include the second capacitance C4, respectively with concatenated first voltage stabilizings of the second capacitance C4 two
Pole pipe D1 and the second zener diode D2, with the concatenated 4th resistance R2 of the first zener diode D1 and with it is described 4th electricity
The output end of the input terminal and the inductance coil L1 that hinder R2 concatenated adjustable resistance VR1, the second capacitance C4 is electrically connected,
The input terminal of the adjustable resistance VR1 and the ports FB of the oscillation chip U1 are electrically connected, the first zener diode D1
Output end and the ports AVDD 103 be electrically connected, the capacity of the second capacitance C4 is 1uf, the adjustable resistance VR1
Standard resistance range be 0 to 20K.
The third Voltage stabilizing module 40 includes the 5th resistance R1 and the concatenated 4th capacitance C3 of the 5th resistance R1 and divides
Not with the concatenated third zener diode D3 and the 4th zener diode D4 of the 4th capacitance C3, the 5th resistance R1's
The ports SW of input terminal and the oscillation chip U1 are electrically connected, and the capacity of the 4th capacitance C3 is 1uf.
Specifically, in the present embodiment：
Input 3.3V is powered on as R3=1K, R4=NC, R5=NC, i.e., has DC to convert voltage output in AVDD, AVEE.
As R3=NC, R4=1K, R5=NC, circuit closed state, Non voltage output.
As R3=NC, R4=NC, R5=1K, microcontroller I/0 connects PWM port 104 on application mainboard, can software control
The voltage output of the power-supplying circuit 100 switchs；
The output voltage of the power-supplying circuit 100：VOUT=maximum output voltages are that +/- 29V is adjustable, and pressure-adjustable drives
Dynamic series connection backlight.
The output voltage of the power-supplying circuit 100：VOUT=maximum output voltages are that +/- 29V is adjustable, are adjusted defeated
Go out voltage regulation resistance, the required VGH, VGL of driving LCD, AVDD voltage.
In the present embodiment, by the design of the adjusting control module 10, when LCD driving IC burnings can be effectively provided
Required 7.5V burning voltages, it is possible to provide the required AVDD and AVEE voltages of screen of HD or more resolution ratio, it is possible to provide driving
Required VGH and VGL voltages of LCD, and then effectively raise user experience, by first Voltage stabilizing module 20, described
The design of second Voltage stabilizing module 30 and the third Voltage stabilizing module 40, effectively to transmitting in the power-supplying circuit 100
Voltage plays voltage regulation result, improves the stability of 100 structure of the power-supplying circuit.
Referring to Fig. 3, the electrical block diagram of the power-supplying circuit 100a provided for second embodiment of the invention, it should
The structure of second embodiment and first embodiment is more or less the same, difference lies in, in the present embodiment, the 4th resistance R2 and institute
It states and is equipped with third capacitance C1 between the ports AVDD 103, be equipped between the third zener diode D3 and the ports AVEE 102
The capacity of 5th capacitance C2, the third capacitance C1 and the 5th capacitance C2 are 1uf, pass through the third capacitance C1 and institute
The design of the 5th capacitance C2 is stated, filter effect effectively is played to the voltage transmitted in the power-supplying circuit 100a.
Above embodiment described the technical principles of the present invention, and the description is merely to explain the principles of the invention, and
It cannot be construed to the limitation of the scope of the present invention in any way.Based on the explanation herein, those skilled in the art is not required to
Other specific implementation modes of the present invention can be associated by paying performing creative labour, these modes fall within the present invention's
In protection domain.
Claims (10)
1. a kind of power-supplying circuit, which is characterized in that including：
Adjusting control module is set between the ports AVEE, the ports AVDD, PWM port and power input port, the adjusting control
Module is used to control the output voltage of the ports AVEE and the ports AVDD；
First Voltage stabilizing module is set between the ports AVEE, the ports AVDD and the adjusting control module, described first
Voltage stabilizing module is used to stablize the voltage that the adjusting control module is conveyed towards the ports AVEE or the ports AVDD；
Second Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVDD, and second Voltage stabilizing module is used for
Stablize the voltage that first Voltage stabilizing module is conveyed towards the ports AVDD；
Third Voltage stabilizing module is set between first Voltage stabilizing module and the ports AVEE, and the third Voltage stabilizing module is used for
Stablize the voltage that first Voltage stabilizing module is conveyed towards the ports AVEE.
2. power-supplying circuit according to claim 1, which is characterized in that the adjusting control module includes the first electricity
Hold, respectively with the concatenated first resistor of first capacitance and second resistance and with the concatenated 3rd resistor of the second resistance,
The output end of the 3rd resistor is electrically connected with the PWM port.
3. power-supplying circuit according to claim 2, which is characterized in that first Voltage stabilizing module includes oscillation chip
And inductance coil, the oscillation chip respectively with the adjusting control module, second Voltage stabilizing module and the third voltage stabilizing
Module is electrically connected, and the input terminal of the inductance coil is electrically connected with the adjusting control module, output end and described second
Voltage stabilizing module is electrically connected.
4. power-supplying circuit according to claim 3, which is characterized in that the oscillation chip uses AP3012 model cores
Piece is made, and the ports VIN of the oscillation chip are electrically connected with the power input port, the ends SHDN of the oscillation chip
Mouth is electrically connected with the first resistor, the second resistance, the 3rd resistor respectively.
5. power-supplying circuit according to claim 3, which is characterized in that second Voltage stabilizing module includes the second electricity
Hold, respectively with concatenated first zener diode of second capacitance and the second zener diode, with two pole of the first voltage stabilizing
Manage concatenated 4th resistance and with the concatenated adjustable resistance of the 4th resistance.
6. power-supplying circuit according to claim 5, which is characterized in that the input terminal of second capacitance and the electricity
The output end for feeling coil is electrically connected, and the input terminal of the adjustable resistance and the ports FB of the oscillation chip are electrically connected, institute
The output end and the ports AVDD for stating the first zener diode are electrically connected.
7. power-supplying circuit according to claim 5, which is characterized in that the 4th resistance and the ports AVDD it
Between be equipped with third capacitance.
8. power-supplying circuit according to claim 3, which is characterized in that the third Voltage stabilizing module includes the 5th electricity
Resistance, with concatenated 4th capacitance of the 5th resistance and respectively with the concatenated third zener diode of the 4th capacitance and the 4th
Zener diode.
9. power-supplying circuit according to claim 8, which is characterized in that the input terminal of the 5th resistance shakes with described
The ports SW for swinging chip are electrically connected.
10. power-supplying circuit according to claim 8, which is characterized in that the third zener diode with it is described
The 5th capacitance is equipped between the ports AVEE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983632.2A CN108777550A (en) | 2018-08-27 | 2018-08-27 | Power-supplying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983632.2A CN108777550A (en) | 2018-08-27 | 2018-08-27 | Power-supplying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108777550A true CN108777550A (en) | 2018-11-09 |
Family
ID=64029490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810983632.2A Pending CN108777550A (en) | 2018-08-27 | 2018-08-27 | Power-supplying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108777550A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110136671A (en) * | 2019-05-27 | 2019-08-16 | 深圳市瑞联高科通讯有限公司 | The vehicle-mounted adaptive application apparatus of LVDS interface LCD |
| CN110518804A (en) * | 2019-09-19 | 2019-11-29 | 深圳市必易微电子有限公司 | The control circuit and its method of supplying power to of synchronous rectification and isolated power converting circuit |
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| CN104467421A (en) * | 2014-12-12 | 2015-03-25 | 柳州铁道职业技术学院 | Switching power source based on switch voltage stabilizing type integrated circuit |
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| CN208723804U (en) * | 2018-08-27 | 2019-04-09 | 重庆两江联创电子有限公司 | Power-supplying circuit |
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2018
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| CN202435264U (en) * | 2011-12-27 | 2012-09-12 | Tcl显示科技（惠州）有限公司 | Power supplying power supply device of liquid crystal module (LCM) test system |
| CN104467421A (en) * | 2014-12-12 | 2015-03-25 | 柳州铁道职业技术学院 | Switching power source based on switch voltage stabilizing type integrated circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110136671A (en) * | 2019-05-27 | 2019-08-16 | 深圳市瑞联高科通讯有限公司 | The vehicle-mounted adaptive application apparatus of LVDS interface LCD |
| CN110136671B (en) * | 2019-05-27 | 2024-03-12 | 深圳市雪貂科技有限公司 | LCD self-adaptive application device with vehicle-mounted LVDS interface |
| CN110518804A (en) * | 2019-09-19 | 2019-11-29 | 深圳市必易微电子有限公司 | The control circuit and its method of supplying power to of synchronous rectification and isolated power converting circuit |
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