CN107017766A - Mobile computer display controller 3.3V turns 1.8V output conversion circuits - Google Patents
Mobile computer display controller 3.3V turns 1.8V output conversion circuits Download PDFInfo
- Publication number
- CN107017766A CN107017766A CN201610060506.0A CN201610060506A CN107017766A CN 107017766 A CN107017766 A CN 107017766A CN 201610060506 A CN201610060506 A CN 201610060506A CN 107017766 A CN107017766 A CN 107017766A
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- China
- Prior art keywords
- controller
- pnp pipe
- diode
- mobile computer
- computer display
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
Turn 1.8V output conversion circuits the present invention relates to a kind of mobile computer display controller 3.3V, including 3.3V electricity consumptions branch road and 1.8V electricity consumption branch roads, also include controller, converting branch and 3.3V power supplys, converting branch includes PNP pipe and diode, the emitter stage of PNP pipe is connected with 3.3V power supplys and 3.3V electricity consumption branch roads respectively, base stage is connected with controller, the positive pole connection of colelctor electrode and diode, the negative pole of diode is connected with 1.8V electricity consumption branch roads, and controller controls the on or off of PNP pipe by output control signal.Compared with prior art, 3.3V Power converts are exported into 1.8V present invention uses converting branch, can be only equipped with a power supply, simplify circuit structure.
Description
Technical field
Field is handed over the present invention relates to a kind of rail, is used more particularly, to a kind of mobile computer display controller
3.3V turns 1.8V output conversion electricity.
Background technology
High ferro is increasingly favored by its comfortable experience by traveler, while track traffic is also because of its powerful fortune
Power, is employed in increasing city, in high ferro and field of track traffic, and controller is used as whole rail
The control axis of friendship, its significance level is self-evident.
Mobile computer display controller has great convenience and scalability just by increasing rail
Friendship system is used.In mobile computer display controller, 3.3V and 1.8V are two kinds of electricity being frequently seen
It is flat.When doing circuit design, the demand that 3.3V is converted to 1.8V also can be usually run into.And it is commonly used in power
The change-over circuit of output can typically use conversion IC (such as Lm3673), although conversion accuracy is higher, and versatility is good,
But be typically necessary collocation peripheral circuit and use.And cost is of a relatively high.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of mobile computer
Display controller 3.3V turns 1.8V output conversion electricity.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of mobile computer display controller 3.3V turns 1.8V output conversion circuits, including 3.3V electricity consumption branch
Road and 1.8V electricity consumption branch roads, in addition to controller, converting branch and 3.3V power supplys, the converting branch include
PNP pipe and diode, the emitter stage of the PNP pipe are connected with 3.3V power supplys and 3.3V electricity consumption branch roads respectively,
Base stage is connected with controller, the positive pole connection of colelctor electrode and diode, negative pole and the 1.8V electricity consumptions of the diode
Branch road is connected, and controller controls the on or off of PNP pipe by output control signal.
The PNP pipe is germanium tube.
The PNP pipe is silicone tube.
The controller is single-chip microcomputer.
The controller is bleeder circuit
The control signal of the controller output is level signal.
The forward conduction voltage drop of the diode is 1.5V with PNP pipe saturation voltage drop sum, and its type selecting process includes
Step：
S1：Determine conducting electric current；
S2：The saturation voltage drop of PNP pipe is determined according to conducting electric current；
S3：The forward conduction voltage drop of diode is determined according to the saturation voltage drop of PNP pipe：
S4：Judged whether to select the two of corresponding specification according to conducting electric current and obtained forward conduction voltage drop
Pole pipe, if it has, then this specification diode is selected, if it has not, the then specification and repeat step of change PNP pipe
S2。
Compared with prior art, the present invention has advantages below：
1) used converting branch that 3.3V Power converts are exported into 1.8V, can only be equipped with a power supply, simplified
Circuit structure.
2) converting branch is simple in construction, and only comprising two elements, and two components are cheap；Compare suitable
For to output voltage required precision it is not high but to cost than more sensitive occasion.
3) PNP pipe is silicone tube, and technology maturation, yield is big, and price is low, and cost is reasonable.
4) controller uses single-chip microcomputer, and the single-chip microcomputer can be remaining module in mobile computer display controller
Single-chip microcomputer, it is highly integrated, reduce component, with low cost, compact conformation.
If it is controlled 5) control and need not turn 1.8V circuits to 3.3V, can also be defeated by bleeder circuit of connecting
Go out a voltage signal to the base stage of PNP pipe, to make circuit constantly on.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the characteristic curve of triode in embodiment,
Fig. 3 is the characteristic curve of diode in embodiment；
Fig. 4 is the schematic diagram of series connection bleeder circuit；
Wherein：1st, 3.3V electricity consumptions branch road, 2,1.8V electricity consumption branch roads, 3, controller, 4, converting branch, 5,
3.3V power supply.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the technology of the present invention side
Implemented premised on case, give detailed embodiment and specific operating process, but the protection model of the present invention
Enclose and be not limited to following embodiments.
A kind of 3.3V of mobile computer display controller 3 turns 1.8V output conversion circuits, as shown in figure 1, bag
Include 3.3V electricity consumptions branch road 1 and 1.8V electricity consumptions branch road 1, in addition to controller 3, converting branch 4 and 3.3V power supplys
5, converting branch 4 includes PNP pipe Q1 and diode D1, and PNP pipe Q1 emitter stage is electric with 3.3V respectively
Source 5 and 3.3V electricity consumptions branch road 1 are connected, and base stage is connected with controller 3, colelctor electrode and diode D1 positive pole
Connection, diode D1 negative pole is connected with 1.8V electricity consumptions branch road 1, and controller 3 passes through output control signal control
PNP pipe Q1 processed on or off.
Use converting branch 4 that 3.3V power supplys 5 are changed into output 1.8V, can only be equipped with a power supply, simplified
Circuit structure, converting branch 4 it is simple in construction, only comprising two elements, and two components are cheap；Than
Relatively be applied to it is not high to output voltage required precision but to cost than more sensitive occasion.
The control signal that controller 3 is exported is level signal, when control signal is high level, PNP pipe cut-off,
Subsequently without output voltage, when control signal is low level, PNP pipe conducting；Input voltage passes through PNP pipe
Turn into output voltage after Q1 and diode D1., can be by output voltage by selecting PNP pipe and diode
Scope control is 1.8 or so (voltage by Q1 and D1 then can produce pressure drop).Specifically, level signal is 2.6V
During the above, PNP pipe Q1 cut-offs, when level signal is less than 2.6V, PNP pipe Q1 conductings,
PNP pipe Q1 is germanium tube or silicone tube, and controller 3 is single-chip microcomputer, and the single-chip microcomputer can be that mobile computer shows
Show the single-chip microcomputer of remaining module in controller 3, it is highly integrated, reduce component, with low cost, compact conformation.
If 1.8V circuits need not be turned to 3.3V to be controlled, a voltage can also be exported by bleeder circuit of connecting
Signal to PNP pipe base stage, to make circuit constantly on.Bleeder circuit of connecting is two resistant series,
Connect partial pressure shop road output be the output between two resistance voltage, it is specific as shown in figure 4, wherein resistance
R1 and resistance R2 series connection, output point out is the output of the series connection bleeder circuit, the connection of the resistance R1 other ends
High level (such as VCC), resistance R2 other ends connection low level (being for example grounded).
Diode D1 forward conduction voltage drop is 1.5V, its type selecting process bag with PNP pipe Q1 saturation voltage drops sum
Include step：
S1：Determine conducting electric current；
S2：As shown in Fig. 2 determining the saturation voltage drop of PNP pipe according to conducting electric current (collector current)；
S3：The forward conduction voltage drop of diode is determined according to the saturation voltage drop of triode：
S4：As shown in figure 3, according to conducting electric current (instantaneous forward current) and obtained forward conduction voltage drop
(transient forward voltage) judges whether to select the diode of corresponding specification, if it has, then selecting this specification two
Pole pipe, if it has not, the then specification and repeat step S2 of change PNP pipe.
Claims (6)
1. a kind of mobile computer display controller 3.3V turns 1.8V output conversion circuits, including 3.3V electricity consumptions
Branch road and 1.8V electricity consumption branch roads, it is characterised in that described also including controller, converting branch and 3.3V power supplys
Converting branch includes PNP pipe and diode, and the emitter stage of the PNP pipe is used with 3.3V power supplys and 3.3V respectively
Electric branch road connection, base stage is connected with controller, the positive pole connection of colelctor electrode and diode, the negative pole of the diode
It is connected with 1.8V electricity consumption branch roads, controller controls the on or off of PNP pipe by output control signal.
Turn 2. a kind of mobile computer display controller 3.3V according to claim 1 turns 1.8V outputs
Change circuit, it is characterised in that the PNP pipe is silicone tube.
3. 1.8V is turned with 3.3V according to any described a kind of mobile computer display controller in claim 1-2
Output conversion circuit, it is characterised in that the controller is single-chip microcomputer.
4. 1.8V is turned with 3.3V according to any described a kind of mobile computer display controller in claim 1-2
Output conversion circuit, it is characterised in that the controller is bleeder circuit.
Turn 5. a kind of mobile computer display controller 3.3V according to claim 2 turns 1.8V outputs
Change circuit, it is characterised in that the control signal of the controller output is level signal.
Turn 6. a kind of mobile computer display controller 3.3V according to claim 1 turns 1.8V outputs
Change circuit, it is characterised in that the forward conduction voltage drop of the diode is 1.5V with PNP pipe saturation voltage drop sum,
Its type selecting process includes step：
S1：Determine conducting electric current；
S2：The saturation voltage drop of PNP pipe is determined according to conducting electric current；
S3：The forward conduction voltage drop of diode is determined according to the saturation voltage drop of PNP pipe：
S4：Judged whether to select the two of corresponding specification according to conducting electric current and obtained forward conduction voltage drop
Pole pipe, if it has, then this specification diode is selected, if it has not, the then specification and repeat step of change PNP pipe
S2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060506.0A CN107017766A (en) | 2016-01-28 | 2016-01-28 | Mobile computer display controller 3.3V turns 1.8V output conversion circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060506.0A CN107017766A (en) | 2016-01-28 | 2016-01-28 | Mobile computer display controller 3.3V turns 1.8V output conversion circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107017766A true CN107017766A (en) | 2017-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610060506.0A Pending CN107017766A (en) | 2016-01-28 | 2016-01-28 | Mobile computer display controller 3.3V turns 1.8V output conversion circuits |
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|---|---|
| CN (1) | CN107017766A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174792A (en) * | 2006-11-03 | 2008-05-07 | 群康科技(深圳)有限公司 | DC-DC converting circuit |
| CN201118443Y (en) * | 2007-08-30 | 2008-09-17 | 南京英软科技开发有限公司 | DC-DC converter for electric car |
| CN205544934U (en) * | 2016-01-28 | 2016-08-31 | 帕克西铁道电子信息系统（上海）有限公司 | 3. 3V changes 1. 8V output converting circuit for mobile computer display controller |
-
2016
- 2016-01-28 CN CN201610060506.0A patent/CN107017766A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174792A (en) * | 2006-11-03 | 2008-05-07 | 群康科技(深圳)有限公司 | DC-DC converting circuit |
| CN201118443Y (en) * | 2007-08-30 | 2008-09-17 | 南京英软科技开发有限公司 | DC-DC converter for electric car |
| CN205544934U (en) * | 2016-01-28 | 2016-08-31 | 帕克西铁道电子信息系统（上海）有限公司 | 3. 3V changes 1. 8V output converting circuit for mobile computer display controller |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170804 |
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| RJ01 | Rejection of invention patent application after publication |