CN208738821U - Computer adaptor power supplies input protection circuit - Google Patents
Computer adaptor power supplies input protection circuit Download PDFInfo
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- CN208738821U CN208738821U CN201821318092.8U CN201821318092U CN208738821U CN 208738821 U CN208738821 U CN 208738821U CN 201821318092 U CN201821318092 U CN 201821318092U CN 208738821 U CN208738821 U CN 208738821U
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Abstract
The utility model embodiment discloses a kind of computer adaptor power supplies input protection circuit, comprising: for connecting the current-limiting protection module of adaptor power supplies；The insulation blocking module being electrically connected with current-limiting protection module；And the over-voltage control module being electrically connected with current-limiting protection module and insulation blocking module.The utility model embodiment is monitored by input voltage to adaptor power supplies and electric current; gather four kinds of overcurrent, under-voltage, overvoltage protection and soft start salvos; an insulation blocking is done between adapter input terminal and computer system; to which computing system be effectively protected; the terminal device for solving to cause because of the case where adapter end operation irregularity or burst are failed burns, causes electrical hazard, and accident is avoided to bring personal injury and the loss of assets to user.
Description
Technical field
The utility model relates to power technique fields more particularly to a kind of computer adaptor power supplies input protection circuits.
Background technique
With the popularity of the internet and deeply, terminal device is all used in more and more industrial application scenes as people
The middleware link of machine interaction, most computer terminal is all the power supply mode using adapter, since terminal is set
Standby is as primary human's interactive device, and the safety and stability of equipment has higher requirement, when power supply adaptor occurs
The case where operation irregularity or burst failure, it is easy to very big surge voltage is generated, terminal device excessively high voltage will occur,
It is burnt so as to cause terminal device, or even causes electrical hazard, personal injury and the loss of assets are brought to user.
Utility model content
The technical problem to be solved by the embodiment of the utility model is, providing a kind of computer adaptor power supplies input guarantor
Protection circuit, so as to cope with the operation irregularity of adaptor power supplies or the situation of burst failure.
In order to solve the above-mentioned technical problem, the utility model embodiment proposes a kind of computer adaptor power supplies input guarantor
Protection circuit, comprising: for connecting the current-limiting protection module of adaptor power supplies；The insulation blocking mould being electrically connected with current-limiting protection module
Block；And the over-voltage control module being electrically connected with current-limiting protection module and insulation blocking module.
Further, the current-limiting protection module includes power input VIN, capacitor C117, capacitor C119, fuse
F1, fuse F2, resistance R165, capacitor C118, capacitor C110；Power input VIN is for connecting adaptor power supplies；Capacitor
One end of C117 and capacitor C119 are all connected with power input VIN, and the other end is grounded；One end of fuse F1, fuse F2
It is all connected with power input VIN, the other end connects one end of resistance R165；The one of the other end connection capacitor C118 of resistance R165
End, the other end ground connection of capacitor C118；One end of one end connection resistance R165 of capacitor C110, another termination of capacitor C110
Ground.
Further, the insulation blocking module includes metal-oxide-semiconductor, resistance R172, resistance R212, resistance R207, capacitor
C107, capacitor C124, capacitor C115；The drain electrode of one end connection metal-oxide-semiconductor of capacitor C107, the other end connect the grid of metal-oxide-semiconductor；Electricity
The grid of one end connection metal-oxide-semiconductor of R212 is hindered, the other end is connect with one end of resistance R207；One end of resistance R172 connects MOS
The drain electrode of pipe, the other end are connect with the other end of resistance R212；Capacitor C124, capacitor C115 one end with the source electrode of metal-oxide-semiconductor
Connection, capacitor C124, capacitor C115 the other end be grounded.
Further, the over-voltage control module includes resistance R2, resistance R5, resistance R12, voltage-stabiliser tube Q40, capacitor
C135, resistance R225, resistance R173, capacitor C120, chip LM358, resistance R227, capacitor C146, field-effect tube Q54, resistance
The pin C of resistance R2 and voltage-stabiliser tube Q40, R164, diode D2, resistance R174, resistance R226, resistance R166, capacitor C137 draw
The connection of one end of foot R and capacitor C135, resistance R5 and resistance R12 and resistance R2 are connected in parallel；The pin A of voltage-stabiliser tube Q40 connects
Ground；The other end of capacitor C135 is grounded；
Resistance R225, resistance R173, one end of capacitor C120 are connect with the 5th foot of chip LM358, resistance R173, capacitor
The other end of C120 is grounded；Resistance R227, one end of capacitor C146 are connect with the 8th foot of chip LM358, and capacitor C146's is another
End ground connection, the 4th foot ground connection of chip LM358；The 5th foot of field-effect tube Q54 passes through the 7th foot of resistance R164 and chip LM358
Connection；
One end of resistance R174, resistance R166 and capacitor C137 are connect with the 2nd foot of field-effect tube Q54；Resistance R166 and
The other end of capacitor C137 is grounded；The other end of resistance R174 is connect with one end of resistance R226, the other end of resistance R226
Ground connection；Diode D2 is connected in parallel with resistance R174.
The utility model embodiment is by proposing a kind of computer adaptor power supplies input protection circuit, by adapter
The input voltage and electric current of power supply monitor, and gather four kinds of overcurrent, under-voltage, overvoltage protection and soft start salvos, are being adapted to
An insulation blocking is done between device input terminal and computer system, so that computing system be effectively protected, is solved because of adaptation
The case where device end operation irregularity or burst failure and the terminal device that causes burns, causes electrical hazard, avoid accident to making
User brings personal injury and the loss of assets.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the computer adaptor power supplies input protection circuit of the utility model embodiment.
Fig. 2 is the circuit diagram of the computer adaptor power supplies input protection circuit of the utility model embodiment.
Fig. 3 is the circuit diagram of the current-limiting protection module of the utility model embodiment.
Fig. 4 is the circuit diagram of the insulation blocking module of the utility model embodiment.
Fig. 5 is the circuit diagram of the over-voltage control module of the utility model embodiment.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
It mutually combines, the utility model is described in further detail in the following with reference to the drawings and specific embodiments.
If directional instruction (such as up, down, left, right, before and after ...) is only used for explaining in the utility model embodiment
In relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if the specific appearance
When state changes, then directionality instruction also correspondingly changes correspondingly.
If in addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot manage
Solution is its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.
Fig. 1 is please referred to, the computer adaptor power supplies input protection circuit of the utility model embodiment includes current-limiting protection
Module, insulation blocking module and over-voltage control module.
Current-limiting protection module is electrically connected with adaptor power supplies, for being monitored to adaptor power supplies input current, for
Overcurrent condition carries out fuse protection mechanism.Insulation blocking module and current-limiting protection module and calculating mechatronics, for adapter
The voltage of input is buffered, and surge overshoot is avoided to cause the electronic component damage of computer.Over-voltage control module and current limliting
Protective module and the electrical connection of insulation blocking module, detect input voltage state, when there is over-voltage or under-voltage condition, to defeated
Enter end and carries out cutting quarantine measures.
As an implementation, as shown in Figures 2 and 3, current-limiting protection module includes power input VIN, capacitor
C117, capacitor C119, fuse F1, fuse F2, resistance R165, capacitor C118, capacitor C110；Power input VIN is used for
Connect adaptor power supplies；One end of capacitor C117 and capacitor C119 are all connected with power input VIN, and the other end is grounded；Insurance
Silk F1, fuse F2 one end be all connected with power input VIN, the other end connects one end of resistance R165；Resistance R165's is another
One end connects one end of capacitor C118, the other end ground connection of capacitor C118；One end of one end connection resistance R165 of capacitor C110
(one end of capacitor C110 connects insulation blocking module and over-voltage control module simultaneously), the other end ground connection of capacitor C110.Capacitor
C117, capacitor C119 carry out first-level buffer to input power, and fuse F1, fuse F2 are current insurance silk, current limliting 5A.Resistance
R165, capacitor C118, capacitor C110 construct level 2 buffering, eliminate power supply and rise overshoot ripple.
As an implementation, as shown in Figures 2 and 4, insulation blocking module includes metal-oxide-semiconductor, resistance R172, resistance
R212, resistance R207, capacitor C107, capacitor C124, capacitor C115；The drain electrode of one end connection metal-oxide-semiconductor of capacitor C107, the other end
Connect the grid of metal-oxide-semiconductor；The grid of one end connection metal-oxide-semiconductor of resistance R212, the other end are connect with one end of resistance R207, resistance
The other end of R207 connects over-voltage control module；(drain electrode of metal-oxide-semiconductor connects limit for the drain electrode of one end connection metal-oxide-semiconductor of resistance R172
Flow protective module and over-voltage control module), the other end is connect with the other end of resistance R212；The one of capacitor C124, capacitor C115
End connect with the source electrode of metal-oxide-semiconductor, capacitor C124, capacitor C115 the other end be grounded.Metal-oxide-semiconductor is P-channel metal-oxide-semiconductor, is formed
Physical isolation between input power and backend computer.Resistance R172, resistance R212, resistance R207, capacitor C107 utilize P ditch
Road metal-oxide-semiconductor characteristic establishes the slow unlatching mechanism of metal-oxide-semiconductor.Capacitor C124, capacitor C115 are rising establishment process for input power
Carry out shaping operation.The insulation blocking module of the utility model embodiment to established between adaptor power supplies and computer one every
From circuit, passes through the buffering and re-shaping exercise of insulation blocking module after adaptor power supplies enter, be connected to over-voltage control module
Judgement control after, open input metal-oxide-semiconductor, adaptor power supplies allowed to enter computer, complete power supply.
As an implementation, as shown in figures 2 and 5, over-voltage control module includes resistance R2, resistance R5, resistance
R12, voltage-stabiliser tube Q40, capacitor C135, resistance R225, resistance R173, capacitor C120, chip LM358, resistance R227, capacitor
C146, field-effect tube Q54, resistance R164, diode D2, resistance R174, resistance R226, resistance R166, capacitor C137, resistance R2
It is connect with one end of the pin C of voltage-stabiliser tube Q40, pin R and capacitor C135, resistance R5 and resistance R12 company in parallel with resistance R2
It connects；The pin A of voltage-stabiliser tube Q40 is grounded；The other end of capacitor C135 is grounded；One end of resistance R225, resistance R173, capacitor C120
It is connect with the 5th foot of chip LM358, the other end ground connection of resistance R173, capacitor C120；One end of resistance R227, capacitor C146
It is connect with the 8th foot of chip LM358, the other end ground connection of capacitor C146, the 4th foot ground connection of chip LM358；Field-effect tube Q54
The 5th foot connect with the 7th foot of chip LM358 by resistance R164, the 6th foot connection insulation blocking module of field-effect tube Q54
(i.e. the other end of resistance R207)；One end of resistance R174, resistance R166 and capacitor C137 and the 2nd foot of field-effect tube Q54 connect
It connects；The other end of resistance R166 and capacitor C137 are grounded；The other end of resistance R174 connect (this with one end of resistance R226
Outside, one end connection current-limiting protection module and insulation blocking module of resistance R226), the other end ground connection of resistance R226；Diode
D2 is connected in parallel with resistance R174.Resistance R2, resistance R5, resistance R12, voltage-stabiliser tube Q40, capacitor C135 pass through input voltage, benefit
With voltage-stabiliser tube Q40, a reference voltage VREF_2.5V is exported.Resistance R225, resistance R173, capacitor C120 establish an over-voltage
Protection point.Chip LM358, resistance R227, capacitor C146 using chip LM358 voltage comparator function, will protection point and
Reference voltage is compared, and protecting point voltage when discovery has been more than predeterminated voltage, then the high level of the 7th foot of flip chip LM358
Output.The high level that field-effect tube Q54, resistance R164 export chip LM358 carries out the driving of level, shaping and export to every
From protective module.Diode D2, resistance R174, resistance R226, resistance R166, capacitor C137 are that threshold line is opened in an input
Road, it is ensured that the supply of adaptor power supplies voltage is then turned on insulation blocking module after stablizing.The over-voltage of the utility model embodiment controls
Module is monitored input voltage, when according to monitoring value for occurring more than preset state, by circuit to insulation blocking
Module control, insulation blocking module is closed rapidly, to achieve the purpose that protect backend computer.
Computer, which can be effectively protected, in the utility model embodiment to cause because of the abnormality of adaptor power supplies
There is over-voltage, overcurrent burns computer, caused personal injury and loss of assets.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and their equivalents.
Claims (4)
1. a kind of computer adaptor power supplies input protection circuit characterized by comprising for connecting the limit of adaptor power supplies
Flow protective module；The insulation blocking module being electrically connected with current-limiting protection module；And with current-limiting protection module and insulation blocking module
The over-voltage control module of electrical connection.
2. computer adaptor power supplies input protection circuit as described in claim 1, which is characterized in that the current-limiting protection mould
Block includes power input VIN, capacitor C117, capacitor C119, fuse F1, fuse F2, resistance R165, capacitor C118, electricity
Hold C110；Power input VIN is for connecting adaptor power supplies；One end of capacitor C117 and capacitor C119 are all connected with power input
VIN is held, the other end is grounded；Fuse F1, fuse F2 one end be all connected with power input VIN, the other end connects resistance
One end of R165；One end of the other end connection capacitor C118 of resistance R165, the other end ground connection of capacitor C118；Capacitor C110's
One end connects one end of resistance R165, the other end ground connection of capacitor C110.
3. computer adaptor power supplies input protection circuit as described in claim 1, which is characterized in that the insulation blocking mould
Block includes metal-oxide-semiconductor, resistance R172, resistance R212, resistance R207, capacitor C107, capacitor C124, capacitor C115；Capacitor C107's
One end connects the drain electrode of metal-oxide-semiconductor, and the other end connects the grid of metal-oxide-semiconductor；The grid of one end connection metal-oxide-semiconductor of resistance R212, it is another
End is connect with one end of resistance R207；The drain electrode of one end connection metal-oxide-semiconductor of resistance R172, the other end of the other end and resistance R212
Connection；Capacitor C124, capacitor C115 one end connect with the source electrode of metal-oxide-semiconductor, capacitor C124, capacitor C115 the other end connect
Ground.
4. computer adaptor power supplies input protection circuit as described in claim 1, which is characterized in that the over-voltage controls mould
Block includes resistance R2, resistance R5, resistance R12, voltage-stabiliser tube Q40, capacitor C135, resistance R225, resistance R173, capacitor C120, core
Piece LM358, resistance R227, capacitor C146, field-effect tube Q54, resistance R164, diode D2, resistance R174, resistance R226, electricity
Hinder R166, capacitor C137, resistance R2 connect with one end of the pin C of voltage-stabiliser tube Q40, pin R and capacitor C135, resistance R5 and
Resistance R12 is connected in parallel with resistance R2；The pin A of voltage-stabiliser tube Q40 is grounded；The other end of capacitor C135 is grounded；
Resistance R225, resistance R173, one end of capacitor C120 are connect with the 5th foot of chip LM358, resistance R173, capacitor C120
The other end ground connection；Resistance R227, one end of capacitor C146 are connect with the 8th foot of chip LM358, another termination of capacitor C146
Ground, the 4th foot ground connection of chip LM358；The 5th foot of field-effect tube Q54 is connect by resistance R164 with the 7th foot of chip LM358；
One end of resistance R174, resistance R166 and capacitor C137 are connect with the 2nd foot of field-effect tube Q54；Resistance R166 and capacitor
The other end of C137 is grounded；The other end of resistance R174 is connect with one end of resistance R226, the other end ground connection of resistance R226；
Diode D2 is connected in parallel with resistance R174.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821318092.8U CN208738821U (en) | 2018-08-16 | 2018-08-16 | Computer adaptor power supplies input protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821318092.8U CN208738821U (en) | 2018-08-16 | 2018-08-16 | Computer adaptor power supplies input protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208738821U true CN208738821U (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821318092.8U Active CN208738821U (en) | 2018-08-16 | 2018-08-16 | Computer adaptor power supplies input protection circuit |
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| CN (1) | CN208738821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532031A (en) * | 2020-11-25 | 2021-03-19 | 浪潮电子信息产业股份有限公司 | Computer equipment and surge voltage protection circuit thereof |
-
2018
- 2018-08-16 CN CN201821318092.8U patent/CN208738821U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532031A (en) * | 2020-11-25 | 2021-03-19 | 浪潮电子信息产业股份有限公司 | Computer equipment and surge voltage protection circuit thereof |
| CN112532031B (en) * | 2020-11-25 | 2023-05-26 | 浪潮电子信息产业股份有限公司 | Computer equipment and surge voltage protection circuit thereof |
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