CN208675102U - A kind of power-on surge current suppression circuit and display screen - Google Patents
A kind of power-on surge current suppression circuit and display screen Download PDFInfo
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- CN208675102U CN208675102U CN201820771491.3U CN201820771491U CN208675102U CN 208675102 U CN208675102 U CN 208675102U CN 201820771491 U CN201820771491 U CN 201820771491U CN 208675102 U CN208675102 U CN 208675102U
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Abstract
The utility model belongs to field of power management, discloses a kind of power-on surge current suppression circuit and display screen, carries out Inrush current restraining to input dc power by electric current suppression module first to generate inhibition voltage；Power module generates supply voltage according to inhibition voltage；Then control module on the supply voltage electricity after output control voltage；Switch drive module generates driving voltage further according to control voltage；Switch module is connected to input dc power according to driving voltage, and last power module is electrically generated supply voltage according to input direct-current；When due to booting, the input voltage of power module is the inhibition voltage for having carried out Inrush current restraining, therefore inhibits power-on surge current simultaneously, simplifies power-on surge current suppression circuit structure.
Description
Technical field
The utility model belongs to field of power management more particularly to a kind of power-on surge current suppression circuit and display screen.
Background technique
In Electronic Design, surge generally refers to the strong pulse that that moment breath that power supply has just been opened generates, due to electricity
The non-linear pulse that may be above power supply itself on road itself；Or due in power supply or circuit other parts by itself or
External sharp pulse interference is called surge.It is likely to make circuit burning out in a flash in surge, and power-on surge current inhibits electricity
Road is exactly the protection circuit using non-linear element to surge.
Traditional display screen can generate certain inrush current shock, surge impact electric current is sometimes in switching on and shutting down power on/off
Meeting moment is bigger than normal, and the electric current tolerance range beyond part electronics member device damages some components.
Utility model content
The utility model provides a kind of power-on surge current suppression circuit and display screen, it is intended to solve existing booting wave
Gush the problem of current suppressing circuit can not simplify hardware design while inhibiting surge current.
The utility model is realized in this way a kind of power-on surge current suppression circuit, the power-on surge current inhibits
Circuit includes:
Inrush current restraining is carried out to generate the electric current suppression module for inhibiting voltage to input dc power；
It is in parallel with the electric current suppression module, for directly transmitting the switch module of the direct current；
It is connect with the electric current suppression module and switch module, for accessing the inhibition voltage or the input direct-current
Electricity, and generate the power module of supply voltage；
It is connect with the power module, the control module for the output control voltage after accessing the supply voltage；With
And
It is connect with the control module, for controlling opening for the switch module on or off according to the control voltage
Close drive module.
The utility model also provides a kind of display screen, which is characterized in that inhibits electricity including such as above-mentioned power-on surge current
Road.
The utility model embodiment carries out Inrush current restraining to input dc power by electric current suppression module first with life
At inhibition voltage；It is linked into power module and generates supply voltage；Then control module exports control after the supply voltage powers on
Voltage processed；Switch drive module is directly accessed direct current, last power supply mould in control voltage drive control switch module conducting
Block is directly accessed direct current and is electrically generated supply voltage；When due to booting, the input voltage of power module is to have carried out surge current suppression
The inhibition voltage of system, therefore inhibit power-on surge current simultaneously, simplify power-on surge current suppression circuit structure.In addition, closing
It can be first turned off switch module when machine, surge current is carried out to direct current using electric current suppression module, avoids the direct current of shutdown
Surge impact is caused to electrical part, can also obtain effect same.
Detailed description of the invention
It is novel in order to illustrate more clearly of the technical application in the utility model embodiment, it below will be in embodiment description
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of function structure chart of power-on surge current suppression circuit provided by the embodiment of the utility model；
Fig. 2 is the exemplary circuit structure chart of power-on surge current suppression circuit provided by the embodiment of the utility model.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Fig. 1 shows the modular structure of power-on surge current suppression circuit provided by the embodiment of the utility model, in order to just
In explanation, part relevant to the utility model embodiment is illustrated only, details are as follows:
A kind of above-mentioned power-on surge current suppression circuit includes:
Inrush current restraining is carried out to generate the electric current suppression module 01 for inhibiting voltage to input dc power VIN.
It is in parallel with electric current suppression module 01, for directly transmitting the switch module 02 of the direct current.
It is connect with electric current suppression module 01 and switch module 02, inhibits voltage or input dc power VIN for accessing, and raw
At the power module 04 of supply voltage.
It is connect with power module 04, the control module 05 for the output control voltage after accessing supply voltage.
In specific implementation, power module 04 is DC-DC conversion module.Can using market maturation LDO scheme or
Single-ended reverse exciting scheme.
It is connect with control module 05, for driving mould according to the switch of control 02 on or off of voltage cut-out module
Block 03.
In specific implementation, control module 05 can be microprocessor or programmable logic array.
The utility model also provides a kind of display screen, which is characterized in that inhibits electricity including such as above-mentioned power-on surge current
Road.
Fig. 2 shows the exemplary circuit structures of power-on surge current suppression circuit provided by the embodiment of the utility model, are
Convenient for explanation, part relevant to the utility model embodiment is illustrated only, details are as follows:
Electric current suppression module 01 includes thermistor RT and first resistor R1, the first end and first resistor of thermistor RT
R1 first end collectively forms the input terminal of electric current suppression module 01, and the second end and first resistor R1 second end of thermistor RT is total
With the output end for constituting electric current suppression module 01.
In specific implementation, thermistor RT and first resistor R1 can also optionally one of them.
Switch module 02 includes field-effect tube M1, first capacitor C1, second resistance R2 and 3rd resistor R3.
The grid of field-effect tube M1 and first end, the first end of second resistance R2 and the 3rd resistor R3 of first capacitor C1
First end connection, the second end of 3rd resistor R3 is the first input end of switch module 02, the source electrode of field-effect tube M1, first
The second end of capacitor C1 and the second end of second resistance R2 collectively form the second input terminal of switch module 02, field-effect tube M1
Drain electrode be switch module 02 output end.
Switch drive module 03 includes triode Q1, the 4th resistance R4 and the 5th resistance R5.
The base stage of triode Q1 is connect with the first end of the first end of the 4th resistance R4 and the 5th resistance R5, the 4th resistance R4
Second end be switch drive module 03 input terminal, the output end of the current collection of triode Q1 extremely switch drive module 03, three
The second end of the emitter of pole pipe Q1 and the 5th resistance R5 are connected to power ground altogether.
It is described further below in conjunction with working principle to shown in Fig. 2:
In the specific implementation process, when input dc power VIN is reached, control module 05 exports low level control voltage
(0V), the low level control voltage reach the base stage of triode Q1, and triode Q1 ends at this time, the collector output of triode Q1
The driving voltage of high level, at this point, the voltage of 3rd resistor R3 is high level, the grid of field-effect tube M1 is high level, field effect
Should pipe M1 cut-off, therefore the surge current that generates is by being suppressed drop after first resistor R1 and/or thermistor RT1 resistance when being switched on
It is low.And control voltage (3.3V) that control module 05 exports high level (after supply voltage powers on) after booting reaches three-level
The voltage of the base stage of pipe Q1, the 4th resistance R4 is high level, and triode Q1 is connected at this time, the collector and 3rd resistor of triode
The voltage of R3 is low level, and the grid of field-effect tube M1 pipe is low level, and field-effect tube M1 conducting is interior after the conducting of field-effect tube pipe
Hinder smaller, input dc power VIN directly passes through field-effect tube M1.
The utility model embodiment carries out Inrush current restraining to input dc power by electric current suppression module first with life
At inhibition voltage；It is linked into power module and generates supply voltage；Then control module exports control after the supply voltage powers on
Voltage processed；Switch drive module is directly accessed direct current, last power supply mould in control voltage drive control switch module conducting
Block is directly accessed direct current and is electrically generated supply voltage；When due to booting, the input voltage of power module is to have carried out surge current suppression
The inhibition voltage of system, therefore inhibit power-on surge current simultaneously, simplify power-on surge current suppression circuit structure.In addition, closing
It can be first turned off switch module when machine, surge current is carried out to direct current using electric current suppression module, avoids the direct current of shutdown
Surge impact is caused to electrical part, can also obtain effect same.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of power-on surge current suppression circuit, which is characterized in that the power-on surge current suppression circuit includes:
Inrush current restraining is carried out to generate the electric current suppression module for inhibiting voltage to input dc power；
It is in parallel with the electric current suppression module, for directly transmitting the switch module of the direct current；
It is connect with the electric current suppression module and switch module, for accessing the inhibition voltage or the input dc power, and
Generate the power module of supply voltage；
It is connect with the power module, the control module for the output control voltage after accessing the supply voltage；And
It is connect with the control module, the switch for controlling the switch module on or off according to the control voltage drives
Dynamic model block.
2. power-on surge current suppression circuit as described in claim 1, which is characterized in that the electric current suppression module includes heat
Quick resistance and/or first resistor.
3. power-on surge current suppression circuit as described in claim 1, which is characterized in that the switch module includes field-effect
Pipe, first capacitor, second resistance and 3rd resistor；
First end, the first end of the second resistance and the third of the grid of the field-effect tube and the first capacitor
The first end of resistance connects, and the second end of the 3rd resistor is the first input end of the switch module, the field-effect tube
Source electrode, the second end of the first capacitor and the second end of the second resistance collectively form the second of the switch module
Input terminal, the drain electrode of the field-effect tube are the output end of the switch module.
4. power-on surge current suppression circuit as described in claim 1, which is characterized in that the switch drive module includes three
Pole pipe, the 4th resistance and the 5th resistance；
The base stage of the triode is connect with the first end of the first end of the 4th resistance and the 5th resistance, and the described 4th
The second end of resistance is the input terminal of the switch drive module, the extremely described switch drive module of the current collection of the triode
The second end of output end, the emitter of the triode and the 5th resistance is connected to power ground altogether.
5. power-on surge current suppression circuit as described in claim 1, which is characterized in that the control module is microprocessor
Or programmable logic array.
6. power-on surge current suppression circuit as described in claim 1, which is characterized in that the power module is that direct current-is straight
Flow conversion module.
7. a kind of display screen, which is characterized in that inhibit including the power-on surge current as described in claim 1 to 6 any one
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820771491.3U CN208675102U (en) | 2018-05-22 | 2018-05-22 | A kind of power-on surge current suppression circuit and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820771491.3U CN208675102U (en) | 2018-05-22 | 2018-05-22 | A kind of power-on surge current suppression circuit and display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208675102U true CN208675102U (en) | 2019-03-29 |
Family
ID=65822769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820771491.3U Active CN208675102U (en) | 2018-05-22 | 2018-05-22 | A kind of power-on surge current suppression circuit and display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208675102U (en) |
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2018
- 2018-05-22 CN CN201820771491.3U patent/CN208675102U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210201 Address after: 2705, building a, xufeihua Tianyuan, 1120 Nigang East Road, Luohu District, Shenzhen, Guangdong 518000 Patentee after: Li Xinglong Address before: 518000 room 701, Science Park industrial building, No.6 Keyuan Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN CITY SHIXIAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210324 Address after: 550000 Yunguan Township office building, 17 suocao Road, Yunguan Township, Nanming District, Guiyang City, Guizhou Province [Yunguan Township] Patentee after: Guiyang Zhenxin Technology Co.,Ltd. Address before: 2705, building a, xufeihua Tianyuan, 1120 Nigang East Road, Luohu District, Shenzhen, Guangdong 518000 Patentee before: Li Xinglong |