CN106708145A - Multichannel power supply circuit - Google Patents
Multichannel power supply circuit Download PDFInfo
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- CN106708145A CN106708145A CN201710203631.7A CN201710203631A CN106708145A CN 106708145 A CN106708145 A CN 106708145A CN 201710203631 A CN201710203631 A CN 201710203631A CN 106708145 A CN106708145 A CN 106708145A
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- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 235000018734 Sambucus australis Nutrition 0.000 description 1
- 244000180577 Sambucus australis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- OGFXBIXJCWAUCH-UHFFFAOYSA-N meso-secoisolariciresinol Natural products C1=2C=C(O)C(OC)=CC=2CC(CO)C(CO)C1C1=CC=C(O)C(OC)=C1 OGFXBIXJCWAUCH-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Automation & Control Theory (AREA)
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- Electromagnetism (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a multichannel power supply circuit. The multichannel power supply circuit comprises a plurality of power supply sub-circuits connected in parallel and a time sequence controller; each power supply sub-circuit comprises a current output unit, and a sensing control unit electrically connected with the current output unit; and the time sequence controller is electrically connected with the sensing control units of the plurality of power supply sub-circuits, the time sequence controller is respectively in communication connection with the current output unit of each power supply sub-circuit, the sensing control unit is electrically connected with a load, each sensing control unit receives current outputted by the corresponding current output unit, transmits the current to the load, and generates a control signal according to the current outputted by the current output unit to send the control signal to the time sequence controller, and the time sequence controller controls the output current of the corresponding power supply sub-circuit according to the control signal when receiving the control signal, so that the output current of the power supply sub-circuits is reduced, and the damage risk of elements and devices caused by the excessively high temperature caused by the excessively high current can be reduced.
Description
Technical field
The present invention relates to power supply technique field, more particularly to a kind of multichannel power supply circuit.
Background technology
With the development of Display Technique, the plane such as liquid crystal display (Liquid Crystal Display, LCD) display dress
Put because having the advantages that high image quality, power saving, fuselage is thin and has a wide range of application, and be widely used in mobile phone, TV, individual number
The various consumption electronic products such as word assistant, digital camera, notebook computer, desktop computer, as the master in display device
Stream.
It is backlight liquid crystal display that liquid crystal display device on existing market is most of, it include liquid crystal display panel and
Backlight module (Backlight Module).The operation principle of liquid crystal display panel is put in the middle of the parallel glass substrate of two panels
Liquid crystal molecule is put, there are many tiny electric wires vertically and horizontally in the middle of two panels glass substrate, liquid crystal is controlled by whether being powered
Molecular changes direction, generation picture is reflected by the light of backlight module.
Usual liquid crystal display panel is by color film (CF, Color Filter) substrate, thin film transistor (TFT) (TFT, Thin Film
Transistor) substrate, the liquid crystal (LC, Liquid Crystal) that is sandwiched between color membrane substrates and thin film transistor base plate and close
Sealing frame (Sealant) is constituted, and its moulding process is generally comprised：Leading portion array (Array) processing procedure (film, gold-tinted, etching and stripping
Film), stage casing (drive IC with printing electricity into box (Cell) processing procedure (TFT substrate and CF baseplate-laminatings) and back segment module group assembling processing procedure
Road plate is pressed).Wherein, leading portion Array processing procedures are mainly to form TFT substrate, in order to control the motion of liquid crystal molecule；Stage casing
Cell processing procedures are mainly and add liquid crystal between TFT substrate and CF substrates；Back segment module group assembling processing procedure is mainly driving IC pressings
Rotated with the integration of printed circuit board (PCB), and then driving liquid crystal molecule, display image.
As shown in figure 1, be a kind of existing multichannel power supply circuit being applied in liquid crystal display device, including in parallel
First current output unit 101 and the second current output unit 102, the electric current of first current output unit 101 and second are defeated
Go out unit 102 and be electrically connected with load 103, the first current output unit 101 and the second current output unit 102 are simultaneously to load
103 are powered, and the multichannel power supply circuit does not exist to the first current output unit 101 and the second current output unit 102
The unit that the electric current of output is controlled, may be such that the output current or the second electric current of the first current output unit 101 are defeated
The output current for going out unit 102 exceedes default output current, causes the first current output unit 101 and the second current output unit
One in 102 occurs that temperature is too high, so as to cause the risk of component damage, reduces the reliability of circuit.
The content of the invention
It is an object of the invention to provide a kind of multichannel power supply circuit, it can be ensured that each son in multichannel power supply circuit
Output is stablized to the electric current of load and keeps default output current in power supply circuit, it is to avoid one of them or a few height are powered electricity
Road output current is excessive to cause component temperature too high, reduces the risk of component damage.
A kind of many sub- power supply circuits of to achieve the above object, multichannel power supply circuit of present invention offer, including parallel connection,
The time schedule controller being all connected with each sub- power supply circuit, each sub- power supply circuit is electrically connected with load, is load
Power supply；
Each sub- power supply circuit includes：Current output unit and the sensing being electrically connected with the current output unit
Control unit；The time schedule controller has multiple input pins corresponding with many sub- power supply circuits, each input pin with
The sensing control unit of the sub- power supply circuit of correspondence is electrically connected with, and the time schedule controller is defeated with the electric current of each sub- power supply circuit
Go out unit and communicate connection；The sensing control unit is electrically connected with load；
Each sensing control unit, for receiving the electric current of corresponding current output unit output and transmitting to load, and uses
A control signal is generated in the electric current exported according to current output unit, and sends control signals to time schedule controller；
The time schedule controller, for when the control signal is received, according to the control signal to corresponding son
The output current of power supply circuit is controlled, to cause the output current reduction of the sub- power supply circuit, until the sub- power supply
The output current of circuit is equal to default output current.
When the electric current of corresponding current output unit output exceedes default output current, the sensing control unit output control
Signal processed.
Sensing control unit includes：Photo-coupler, comparator, first resistor and second resistance；
First pin of the photo-coupler is electrically connected with current output unit, and second pin is electrically connected with load, the 3rd
Pin is electrically connected with one end of second resistance, and the 4th pin is electrically connected with first node；
The in-phase input end of the comparator is electrically connected with first node, and inverting input accesses reference voltage, output end
It is electrically connected with the corresponding input pin of time schedule controller；
One end of the first resistor is electrically connected with first node, other end ground connection；
The other end of the second resistance accesses supply voltage；
The reference voltage is equal to the voltage of first node when output current is preset in current output unit output.
The photo-coupler includes light emitting diode and phototriode；The anode of the light emitting diode is photo-coupler
The first pin, negative electrode for photo-coupler second pin；The 3rd of the transmitting extremely photo-coupler of the phototriode draws
Pin, the 4th pin of current collection extremely photo-coupler.
When the output end of the comparator exports high level, time schedule controller is exported to corresponding current output unit
Electric current carries out current limliting.
The quantity of the sub- power supply circuit is two.
The default output current of described two sub- power supply circuits is identical, two comparators in described two sub- power supply circuits
Inverting input access identical reference voltage；Or,
The default output current of described two sub- power supply circuits is different, two comparators in described two sub- power supply circuits
Inverting input be respectively connected to different reference voltages.
The current output unit is direct current transducer.
The time schedule controller is communicated with the current output unit of each sub- power supply circuit by I2C buses and is connected.
The default output current sum of the multiple sub- power supply circuit is equal to the rated current of load.
Beneficial effects of the present invention：Multichannel power supply circuit of the invention, the multichannel power supply circuit includes in parallel
Many sub- power supply circuits and time schedule controller；Each sub- power supply circuit includes current output unit and is exported with the electric current
The sensing control unit that unit is electrically connected with；The time schedule controller electrically connects with the sensing control unit of many sub- power supply circuits
Connect, and the time schedule controller is communicated with the current output unit of each sub- power supply circuit and is connected, sensing control unit is electrical
Connection load, each sensing control unit receives the electric current of corresponding current output unit output and transmits to load, and according to electricity
The electric current of stream output unit output generates a control signal and is sent to time schedule controller, and time schedule controller receives control signal
When, the output current of corresponding sub- power supply circuit is controlled according to control signal, to cause the defeated of the sub- power supply circuit
Go out current reduction, reduce component causes temperature too high because electric current is too high, and then the risk damaged.
Brief description of the drawings
In order to be able to be further understood that feature of the invention and technology contents, refer to below in connection with of the invention detailed
Illustrate and accompanying drawing, however accompanying drawing only provide with reference to and explanation use, not for being any limitation as to the present invention.
In accompanying drawing,
Fig. 1 is the circuit diagram of existing multichannel power supply circuit；
Fig. 2 is the circuit diagram of multichannel power supply circuit of the invention.
Specific embodiment
Further to illustrate technological means and its effect that the present invention is taken, it is preferable to carry out below in conjunction with of the invention
Example and its accompanying drawing are described in detail.
Please refer to Fig. 2, the present invention provides a kind of multichannel power supply circuit, including many sub- power supply circuits in parallel
10 and the time schedule controller (TCON) 40 that is all connected with of each sub- power supply circuit 10, each sub- power supply circuit 10 is electrically connected with
Load 20, for load 20 is powered；
Each sub- power supply circuit 10 includes：Current output unit 11 and it is electrically connected with the current output unit 11
Sensing control unit 12；The time schedule controller 40 has multiple input pin As corresponding with many sub- power supply circuits 10, often
One input pin A is electrically connected with the sensing control unit 12 of corresponding sub- power supply circuit 10, and the time schedule controller 40 with it is every
The current output unit 11 of one sub- power supply circuit 10 communicates connection；The sensing control unit 12 is electrically connected with load 20；
Each sensing control unit 12, for receiving the electric current of the output of corresponding current output unit 11 and transmitting to load
20, and electric current one control signal of generation for being exported according to current output unit 11, and send control signals to sequential control
Device processed 20；
The time schedule controller 20, for when the control signal is received, according to the control signal to corresponding
The output current of sub- power supply circuit 10 is controlled, to cause the output current reduction of the sub- power supply circuit 10, until described
The output current of sub- power supply circuit 10 is equal to default output current.
Specifically, when the electric current in the output of corresponding current output unit 11 exceedes default output current, the sensing control
The output control signal of unit 12.
Specifically, the default output current sum of the multiple sub- power supply circuit 10 is equal to the rated current of load 20.
Specifically, the current output unit 11 is direct current transducer.
Specifically, the time schedule controller 40 passes through the current output unit of I2C buses 30 and each sub- power supply circuit 10
11 communication connections.
Further, the I2C buses 30 include serial data line SDA and serial time clock line SCL.
It should be noted that above-mentioned multichannel power supply circuit controls list by using the sensing in each sub- power supply circuit 10
Unit 12 exports while loading 20 the electric current that corresponding current output unit 11 is exported, when the output of current output unit 11
Electric current generates a control signal when being higher than default output current, and sends control signals to time schedule controller 20, the sequential
Controller 20, when the control signal is received, the output according to the control signal to corresponding sub- power supply circuit 10 is electric
Stream is controlled, to cause the output current reduction of the sub- power supply circuit 10, until the output electricity of the sub- power supply circuit 10
Stream is equal to default output current, so that the electric current stabilization of multichannel power supply circuit, prevents the output of a certain sub- power supply circuit 10
Electric current it is excessive cause corresponding current output unit 11 to overheat and damage, lifted circuit reliability.
Specifically, 2 are referred to, now multichannel of the invention is powered in detail by taking a preferred embodiment of the present invention as an example
Circuit is described：
Specifically, in this embodiment, the quantity of the sub- power supply circuit 10 is two.
Specifically, the sensing control unit 12 includes：Photo-coupler 121, comparator 122, first resistor R1 and second
Resistance R2；
First pin 1 of the photo-coupler 121 is electrically connected with current output unit 11, and second pin 2 is electrically connected with negative
20 are carried, the 3rd pin 3 is electrically connected with one end of second resistance R2, the 4th pin 4 is electrically connected with first node C；
The in-phase input end of the comparator 122 is electrically connected with first node C, and inverting input accesses reference voltage
Vref, output end is electrically connected with the corresponding input pin A of time schedule controller 40, and power end accesses supply voltage VCC, ground connection termination
Ground；
One end of the first resistor R1 is electrically connected with first node C, other end ground connection；
The other end of the second resistance R2 accesses supply voltage VCC；
The reference voltage V ref is equal to the voltage of first node C when output current is preset in the output of current output unit 11.
Specifically, when the output end of the comparator 122 exports high level, time schedule controller 40 is defeated to corresponding electric current
The electric current for going out the output of unit 11 carries out current limliting.
Further, the photo-coupler 121 includes light emitting diode D and phototriode Q；The light emitting diode D
Anode for photo-coupler 121 the first pin 1, negative electrode for photo-coupler 121 second pin 2；The phototriode Q's
3rd pin 3 of transmitting extremely photo-coupler 121, the 4th pin 4 of current collection extremely photo-coupler 121.
It should be noted that when the multichannel power supply circuit works, in each sub- power supply circuit 10, electric current output is single
Unit 11 exports first pin 1 namely the sun of light emitting diode D of the photo-coupler 121 in an electric current to touch-control sensing unit 12
Pole, exports to load by second pin 2 namely the negative electrode of light emitting diode D after light emitting diode D from photo-coupler 121
20, now light emitting diode D lights, and the electric current positive correlation that luminous intensity is exported with current output unit 11, therefore photo-coupler
121 voltage of the 4th pin 4 namely the voltage of first node C is one positively related with the electric current that current output unit 11 is exported
Value, and the reference voltage V ref that the inverting input of comparator 122 is accessed and the default output current of the output of current output unit 11
When first node C voltage it is identical, thus electric current in the output of current output unit 11 is less than or equal to default output current
When, the voltage of first node C is less than reference voltage V ref, then now the output end of comparator 122 exports low level；It is defeated in electric current
When the electric current for going out the output of unit 11 is more than default output current, the voltage of first node C is more than reference voltage V ref, then now compare
Output end compared with device 122 exports high level, and the high level is control signal, via the corresponding input pin of time schedule controller 40
A input timings controller 40, after time schedule controller 40 receives the control signal, according to the control signal to corresponding son
The output current of power supply circuit 10 is controlled, to cause the output current reduction of the sub- power supply circuit 10, until the son
The output current of power supply circuit 10 is equal to default output current, and then the electric current of each output of sub- power supply circuit 10 is kept pre-
If output current, so that the electric current stabilization of multichannel power supply circuit, prevents the electric current of a certain output of sub- power supply circuit 10 excessive
Cause corresponding current output unit 11 to overheat and damage, lift the reliability of circuit.
Alternatively, in above preferred embodiment, the default output current of described two sub- power supply circuits 10 is identical, namely
The default output current of two sub- power supply circuits 10 is 1/2nd of the rated current of load 20.It is corresponding, it is described two
The inverting input of two comparators 122 in sub- power supply circuit 10 accesses identical reference voltage V ref.
Alternatively, in above preferred embodiment, the default output current of described two sub- power supply circuits 10 is different, example
Such as, the default output current of one of them sub- power supply circuit 10 is the twice of the default output current of another sub- power supply circuit 10,
Now two default output currents of two sub- power supply circuits 10 are then respectively 1/3rd and three of the rated current for loading 20
/ bis-.Corresponding, the inverting input of two comparators 122 in described two sub- power supply circuits 10 is respectively connected to different
Reference voltage V ref.
In sum, multichannel power supply circuit of the invention, including in parallel many sub- power supply circuits and SECO
Device；It is single that each sub- power supply circuit includes that current output unit and the sensing being electrically connected with the current output unit are controlled
Unit；The sensing control units of the time schedule controller and many sub- power supply circuits are electrically connected with, and the time schedule controller with it is every
The current output unit of one sub- power supply circuit communicates connection, and sensing control unit is electrically connected with load, and each sensing control is single
Unit receives the electric current of corresponding current output unit output and transmits to load, and the electric current generation exported according to current output unit
One control signal is sent to time schedule controller, time schedule controller when control signal is received, according to control signal to corresponding
The output current of sub- power supply circuit is controlled, with cause the sub- power supply circuit output current reduction, reduce component because
Electric current is too high and cause temperature too high, and then damage risk..
The above, for the person of ordinary skill of the art, can be with technology according to the present invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
It is required that protection domain.
Claims (10)
1. a kind of multichannel power supply circuit, it is characterised in that including many sub- power supply circuits (10) in parallel and each sub- power supply
The time schedule controller (40) that circuit (10) is all connected with, each sub- power supply circuit (10) is electrically connected with load (20), is
Load (20) power supply；
Each sub- power supply circuit (10) includes：Current output unit (11) and electrically connect with the current output unit (11)
The sensing control unit (12) for connecing；The time schedule controller (40) is with multiple inputs corresponding with many sub- power supply circuits (10)
Pin (A), each input pin (A) is electrically connected with the sensing control unit (12) of corresponding sub- power supply circuit (10), and described
Time schedule controller (40) is communicated with the current output unit (11) of each sub- power supply circuit (10) and is connected；The sensing control is single
First (12) are electrically connected with load (20)；
Each sensing control unit (12), for receiving the electric current of corresponding current output unit (11) output and transmitting to load
(20) electric current, and for being exported according to current output unit (11) generates a control signal, and when sending control signals to
Sequence controller (20)；
The time schedule controller (20), for when the control signal is received, according to the control signal to corresponding son
The output current of power supply circuit (10) is controlled, to cause the output current reduction of the sub- power supply circuit (10), until institute
The output current for stating sub- power supply circuit (10) is equal to default output current.
2. multichannel power supply circuit as claimed in claim 1, it is characterised in that in corresponding current output unit (11) output
When electric current exceedes default output current, sensing control unit (12) output control signal.
3. multichannel power supply circuit as claimed in claim 2, it is characterised in that sensing control unit (12) includes：Optical coupling
Device (121), comparator (122), first resistor (R1) and second resistance (R2)；
First pin (1) of the photo-coupler (121) is electrically connected with current output unit (11), and second pin (2) electrically connects
Load (20) is connect, the 3rd pin (3) is electrically connected with one end of second resistance (R2), and the 4th pin (4) is electrically connected with first node
(C)；
The in-phase input end of the comparator (122) is electrically connected with first node (C), and inverting input accesses reference voltage
(Vref), output end is electrically connected with the corresponding input pin (A) of time schedule controller (40)；
One end of the first resistor (R1) is electrically connected with first node (C), other end ground connection；
The other end of the second resistance (R2) accesses supply voltage (VCC)；
The reference voltage (Vref) is equal to the electricity of first node (C) when output current is preset in current output unit (11) output
Pressure.
4. as claim 3 multichannel power supply circuit, it is characterised in that the photo-coupler (121) is including light-emitting diodes
Pipe (D) and phototriode (Q)；The anode of the light emitting diode (D) is first pin (1) of photo-coupler (121), negative electrode
It is the second pin (2) of photo-coupler (121)；The 3rd of the transmitting extremely photo-coupler (121) of the phototriode (Q) draws
Pin (3), the 4th pin (4) of current collection extremely photo-coupler (121).
5. multichannel power supply circuit as claimed in claim 3, it is characterised in that defeated in the output end of the comparator (122)
When going out high level, time schedule controller (40) carries out current limliting to the electric current that corresponding current output unit (11) is exported.
6. multichannel power supply circuit as claimed in claim 3, it is characterised in that the quantity of the sub- power supply circuit (10) is two
It is individual.
7. multichannel power supply circuit as claimed in claim 6, it is characterised in that described two sub- power supply circuits (10) it is default
Output current is identical, and the inverting input of two comparators (122) in described two sub- power supply circuits (10) accesses identical
Reference voltage (Vref)；Or,
The default output current of described two sub- power supply circuits (10) is different, two ratios in described two sub- power supply circuits (10)
Different reference voltages (Vref) are respectively connected to compared with the inverting input of device (122).
8. multichannel power supply circuit as claimed in claim 1, it is characterised in that the current output unit (11) is that direct current turns
Parallel operation.
9. multichannel power supply circuit as claimed in claim 1, it is characterised in that the time schedule controller (40) is total by I2C
Line (30) is connected with current output unit (11) communication of each sub- power supply circuit (10).
10. multichannel power supply circuit as claimed in claim 1, it is characterised in that the multiple sub- power supply circuit (10) it is pre-
If output current sum is equal to the rated current of load (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203631.7A CN106708145B (en) | 2017-03-30 | 2017-03-30 | Multichannel power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203631.7A CN106708145B (en) | 2017-03-30 | 2017-03-30 | Multichannel power supply circuit |
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| CN106708145B CN106708145B (en) | 2017-12-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448621A (en) * | 2018-10-19 | 2019-03-08 | 深圳市华星光电技术有限公司 | A kind of driving circuit and display device |
| TWI678856B (en) * | 2018-10-01 | 2019-12-01 | 和碩聯合科技股份有限公司 | Electronic apparatus and power transmission circuit thereof |
| WO2021042457A1 (en) * | 2019-09-06 | 2021-03-11 | 北京集创北方科技股份有限公司 | Display driving chip, and display panel, device and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6130526A (en) * | 1999-04-02 | 2000-10-10 | Semtech Corporation | Voltage regulator with wide control bandwidth |
| CN102047541A (en) * | 2008-06-02 | 2011-05-04 | 株式会社理光 | Current sensing circuit and switching regulator including the same |
| CN103348770A (en) * | 2010-12-27 | 2013-10-09 | Lg伊诺特有限公司 | Power supply |
| CN104656724A (en) * | 2013-11-20 | 2015-05-27 | 鸿富锦精密工业（深圳）有限公司 | Electronic device |
| CN105511535A (en) * | 2014-10-19 | 2016-04-20 | 先慧 | Program-controlled constant-current source based on voltage control |
| WO2017020851A1 (en) * | 2015-08-06 | 2017-02-09 | Huawei Technologies Co., Ltd. | Apparatus and scheme for io-pin-less calibration or trimming of on-chip regulators |
-
2017
- 2017-03-30 CN CN201710203631.7A patent/CN106708145B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6130526A (en) * | 1999-04-02 | 2000-10-10 | Semtech Corporation | Voltage regulator with wide control bandwidth |
| CN102047541A (en) * | 2008-06-02 | 2011-05-04 | 株式会社理光 | Current sensing circuit and switching regulator including the same |
| CN103348770A (en) * | 2010-12-27 | 2013-10-09 | Lg伊诺特有限公司 | Power supply |
| CN104656724A (en) * | 2013-11-20 | 2015-05-27 | 鸿富锦精密工业（深圳）有限公司 | Electronic device |
| CN105511535A (en) * | 2014-10-19 | 2016-04-20 | 先慧 | Program-controlled constant-current source based on voltage control |
| WO2017020851A1 (en) * | 2015-08-06 | 2017-02-09 | Huawei Technologies Co., Ltd. | Apparatus and scheme for io-pin-less calibration or trimming of on-chip regulators |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI678856B (en) * | 2018-10-01 | 2019-12-01 | 和碩聯合科技股份有限公司 | Electronic apparatus and power transmission circuit thereof |
| CN109448621A (en) * | 2018-10-19 | 2019-03-08 | 深圳市华星光电技术有限公司 | A kind of driving circuit and display device |
| WO2021042457A1 (en) * | 2019-09-06 | 2021-03-11 | 北京集创北方科技股份有限公司 | Display driving chip, and display panel, device and system |
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| Publication number | Publication date |
|---|---|
| CN106708145B (en) | 2017-12-29 |
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