CN110445484A - A kind of power supply delays electrification circuit and design method - Google Patents
A kind of power supply delays electrification circuit and design method Download PDFInfo
- Publication number
- CN110445484A CN110445484A CN201910616810.2A CN201910616810A CN110445484A CN 110445484 A CN110445484 A CN 110445484A CN 201910616810 A CN201910616810 A CN 201910616810A CN 110445484 A CN110445484 A CN 110445484A
- Authority
- CN
- China
- Prior art keywords
- oxide
- metal
- semiconductor
- power supply
- connect
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches
Abstract
The present invention relates to a kind of power supplys to delay electrification circuit and design method.The power supply delays electrification circuit, first resistor, second resistance, capacitor and metal-oxide-semiconductor；The first resistor first end is connect with power supply anode, the first resistor second end is connect with the capacitor first end, the capacitor second end is connect with the power cathode, the second resistance is in parallel with the capacitor, the metal-oxide-semiconductor grid is connect with first resistor second end, the metal-oxide-semiconductor source electrode is connect with power cathode, and metal-oxide-semiconductor drain electrode and positive pole connect the both ends of load.Delay electrification circuit by using the power supply of above structure, control metal-oxide-semiconductor module conducting is gone by the delay of electric resistance partial pressure end after the RC module delay that can be divided by strip resistance, to realize that the slow of product supply input powers on.
Description
Technical field
The present invention relates to electronic technology fields more particularly to a kind of power supply to delay electrification circuit and design method.
Background technique
The aircraft such as aircraft, rocket or vehicle will carry out a large number of experiments at ground, and most tests are both needed to be powered
In the case of carry out, since the equipment loaded on aircraft is more, ground will cause biggish punching when powering on to aerocraft system
Electric current is hit, ground power supply may be damaged, while power supply sensing unit on aircraft may also be caused to damage, therefore such as
What is vital to safe and reliable the powering on of aerocraft system.
In the prior art, it is successively powered on by the way of segmentation or by power supply order to reduce dash current, however it is such
Mode it is certain need multistage and meanwhile power in the case where and be not suitable for.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the invention proposes a kind of power supplys to delay electrification circuit and design
Method.
According to an aspect of the present invention, a kind of power supply of the invention delays electrification circuit, comprising: first resistor, the second electricity
Resistance, capacitor and metal-oxide-semiconductor；
The first resistor first end is connect with power supply anode, the first resistor second end and the capacitor first
End connection, the capacitor second end are connect with the power cathode, and the second resistance is in parallel with the capacitor, the metal-oxide-semiconductor
Grid is connect with first resistor second end, and the metal-oxide-semiconductor source electrode is connect with power cathode, the metal-oxide-semiconductor drain electrode and positive pole
Connect the both ends of load.
Power supply using the above structure delays electrification circuit, passes through after the RC module delay that can be divided by strip resistance
Control metal-oxide-semiconductor module conducting is gone in the delay of electric resistance partial pressure end, to realize that the slow of product supply input powers on.
As a further improvement of the present invention, the first resistor and second resistance are variable resistance, and the capacitor is
Variable capacitance.
As a further improvement of the present invention, power supply delays electrification circuit further include: zener diode and transient state inhibit two poles
Pipe；
Zener diode anode is connect with metal-oxide-semiconductor source electrode, and zener diode cathode is connect with metal-oxide-semiconductor grid, and transient state inhibits
Diode cathode is connect with metal-oxide-semiconductor source electrode, and Transient Suppression Diode cathode and metal-oxide-semiconductor drain electrode connect.
According to another aspect of the present invention, the present invention provides the design methods that a kind of power supply delays electrification circuit, including
Step:
Driving voltage Vmos, which is preset, according to power supply voltage Vu and metal-oxide-semiconductor grid source determines first resistor resistance value R1, second
The ratio of resistance R2；
Metal-oxide-semiconductor is determined according to the rated current I of load and power supply voltage Vu；
Delay electrification circuit predetermined time delay t and metal-oxide-semiconductor cut-in voltage V according to the power supplyGSDetermine capacitor.
Using above-mentioned design method, electrification circuit can be delayed according to power supply voltage, the rated current of load and power supply
Predetermined time delay flexibly chooses first resistor, second resistance, metal-oxide-semiconductor and capacitor, is adapted to different power supply voltage,
Different delay time requirements can also be met.
As a further improvement of the present invention, described that electricity is driven according to power supply voltage Vu and scheduled metal-oxide-semiconductor grid source
Pressure Vmos determines the ratio of first resistor resistance value R1, second resistance resistance value R2, so that R1, R2 meet
As a further improvement of the present invention, described that MOS is determined according to the rated current I and power supply voltage Vu of load
Pipe, so that the rated power P of metal-oxide-semiconductorD, conducting resistance RDSMeet: PD> I2×RDS, the drain-source breakdown voltage BV of metal-oxide-semiconductorDSSIt is full
Foot: BVDSS> Vu.
As a further improvement of the present invention, described according to scheduled delay t and metal-oxide-semiconductor cut-in voltage VGSDetermine electricity
Hold, so that the capacitance C1 of capacitor meets:
In conclusion through the invention it is contemplated above technical scheme is compared with the prior art, securely and reliably, use letter
It is single, it is applicable on the aircraft product of no stringent electrifying timing sequence requirement and uses, not only can guarantee that the product steadily powers on, but also
It can guarantee that aerocraft system powers on safe and reliable, while being adapted to different power supply voltage, difference can also be met
Delay time requirement, be conveniently transplanted to distinct device, applicability is wide.
Detailed description of the invention
Fig. 1 is the schematic diagram that power supply provided in an embodiment of the present invention delays electrification circuit；
Fig. 2 is the structure chart that power supply provided in an embodiment of the present invention delays electrification circuit；
Fig. 3 is the design method schematic diagram that power supply provided in an embodiment of the present invention delays electrification circuit.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and example, to this
Invention is further elaborated.It should be appreciated that specific example described herein is only used to explain the present invention, and do not have to
It is of the invention in limiting.In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other
Between do not constitute conflict and can be combined with each other.
Scheme provided in an embodiment of the present invention, the RC module that can be divided by strip resistance pass through electric resistance partial pressure end after being delayed
Control metal-oxide-semiconductor module conducting is gone in delay, to realize that the slow of product supply input powers on.It can be according to power supply voltage, negative
The rated current and power supply of load delay electrification circuit predetermined time delay and flexibly choose first resistor, second resistance, metal-oxide-semiconductor and electricity
Hold.Using such mode, securely and reliably, using simple, it is applicable to the aircraft product of no stringent electrifying timing sequence requirement
Upper use not only can guarantee that the product steadily powered on, but also can guarantee that aerocraft system powers on safe and reliable, while being adapted to not
Same power supply voltage, can also meet different delay time requirements, conveniently be transplanted to distinct device, applicability is wide.
Fig. 1 shows the schematic diagram that a kind of power supply provided in an embodiment of the present invention delays electrification circuit, which includes one
The RC module of strip resistance partial pressure, a metal-oxide-semiconductor module pass through resistance after the RC module delay that power supply is divided by strip resistance
Control metal-oxide-semiconductor module conducting is gone in the delay of partial pressure end, to realize that the slow of product supply input powers on.
Fig. 2 shows a kind of structure charts of the slow electrification circuit of power supply provided in an embodiment of the present invention, including include: first resistor
R1, second resistance R2, capacitor C1 and metal-oxide-semiconductor, the first resistor R1 first end are connect with power supply anode, first electricity
Resistance R1 second end is connect with the capacitor C1 first end, and the capacitor C1 second end is connect with the power cathode, and described second
Resistance R2 is in parallel with the capacitor C1, and the metal-oxide-semiconductor grid is connect with first resistor R1 second end, the metal-oxide-semiconductor source electrode and electricity
The connection of source cathode, the metal-oxide-semiconductor drain electrode and positive pole connect the both ends of load Rx.Rx is the equivalent impedance that need to power on product.Its
In be made of the RC module with divider resistance R1, R2, C1, supply voltage divided by R1, R2 after as metal-oxide-semiconductor driving it is electric
Pressure, R1, C1 are RC delay circuit.
It can also include: zener diode V1 and Transient Suppression Diode V2 that power supply, which delays electrification circuit, and zener diode is just
Pole is connect with metal-oxide-semiconductor source electrode, and zener diode cathode is connect with metal-oxide-semiconductor grid, Transient Suppression Diode anode and metal-oxide-semiconductor source electrode
Connection, Transient Suppression Diode cathode and metal-oxide-semiconductor drain electrode connect.Zener diode V1 is used to protect the grid grade of metal-oxide-semiconductor V2, transient state
Diode V3 is inhibited to be used to protect the drain electrode of metal-oxide-semiconductor.
It can also include filter circuit that power supply, which delays electrification circuit, and the output for delaying electrification circuit to power supply is filtered.C2,C3
For power filtering capacitor.
The first resistor R1 and second resistance R2 that power supply delays electrification circuit can be variable resistance, and the capacitor C1 can be with
For variable capacitance.
Fig. 3 is the design method that a kind of power supply provided in an embodiment of the present invention delays electrification circuit, comprising steps of
(1) driving voltage Vmos is preset according to power supply voltage Vu and metal-oxide-semiconductor grid source and determines first resistor resistance value R1, the
The ratio of two resistance R2.Only as power supply voltage Vu and metal-oxide-semiconductor cut-in voltage VGSMeet: Vu > VGS, just can be used
The present invention.But there are a special circumstances, generally work as VGS< VPower supplyWhen < Vmos, it may be unnecessary to divide, is i.e. not need R2 in Fig. 2, directly
It connects and delay circuit is constituted by R1, C1；Work as VPower supplyIt, can basis when > VmosDetermine electric resistance partial pressure ratio, according to point
Pressure ratio selectes resistance.The resistance ratio actually chosenIt can beUpper and lower a small range fluctuation.
(2) metal-oxide-semiconductor is determined according to the rated current I of load and power supply voltage Vu.Optional N-channel or P-channel MOS
Pipe, conducting resistance RDSIt is the smaller the better, such product at work the pressure drop on metal-oxide-semiconductor and consumption power with regard to small.The volume of metal-oxide-semiconductor
Determine power PD, conducting resistance RDSMeet: PD> I2×RDS.Drain-source breakdown voltage BV simultaneouslyDSSIt needs to meet: BVDSS> Vu, BVDSSMore
It is big better.Cut-in voltage VGSIt is the smaller the better, it can guarantee that metal-oxide-semiconductor is reliably connected in this way.
(3) electrification circuit predetermined time delay t and metal-oxide-semiconductor cut-in voltage V are delayed according to power supplyGSDetermine capacitor.It is expected to prolong
When the time be t, pass through formulaCalculate the capacitance of capacitor C1, wherein VGSFor the cut-in voltage of metal-oxide-semiconductor,
Vu is power supply voltage.The capacitor C1 capacitance actually chosen small range can fluctuate above and below the capacitance being calculated.
Using such design method, can flexibly be chosen according to the rated current of different power supply voltage and product
Suitable first resistor, second resistance, capacitor and metal-oxide-semiconductor, are conveniently transplanted to other equipment, applicability is wide.
It is illustrated below with an example.
When the input power supply of product is inputted using 28V, the gate source voltage of general metal-oxide-semiconductor uses the level of 10V or so
It is driven, therefore passes through formulaCalculate to obtain electric resistance partial pressure ratioIt is chosen according to the intrinsic standoff ratio
The specific resistance value of resistance chooses R1=100K, R2=51K in this circuit；
Rated current I needed for product is 2A, the conducting resistance R for the N-channel MOS pipe chosen in this circuit in this circuitDS
=0.008 Ω, passes through P=I2× R is calculated, and the power consumption of metal-oxide-semiconductor is 0.032W when product works normally, maximum much smaller than metal-oxide-semiconductor
Power consumption 125W, meets requirement；Pressure drop 0.016V when product works normally on metal-oxide-semiconductor is calculated additionally by U=I × R, it is right
The product of 28V power supply is without influence；The drain-source breakdown voltage BV of the metal-oxide-semiconductor simultaneouslyDSS=55V, can safety under 28V power supply
Reliable work；Furthermore the cut-in voltage V of the metal-oxide-semiconductorGS=4V, to designing, the slow delayed time is most important.
Expected delay time t is 150ms in this example, passes through formulaWherein VuFor power supply
Voltage 28V, VGSC=9.73uF, therefore practical selection capacitor C=10uF is calculated in=4V.When the voltage on capacitor C1 is 4V
When metal-oxide-semiconductor will be connected, surveying slow power-on time is 154ms.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of power supply delays electrification circuit characterized by comprising first resistor, second resistance, capacitor and metal-oxide-semiconductor；
The first resistor first end is connect with power supply anode, and the first resistor second end and the capacitor first end connect
It connects, the capacitor second end is connect with the power cathode, and the second resistance is in parallel with the capacitor, the metal-oxide-semiconductor grid
It is connect with first resistor second end, the metal-oxide-semiconductor source electrode is connect with power cathode, and metal-oxide-semiconductor drain electrode and positive pole connect negative
The both ends of load.
2. a kind of power supply as described in claim 1 delays electrification circuit, which is characterized in that the first resistor and second resistance are equal
For variable resistance, the capacitor is variable capacitance.
3. a kind of power supply as claimed in claim 1 or 2 delays electrification circuit, which is characterized in that further include: zener diode and wink
State inhibits diode；
Zener diode anode is connect with metal-oxide-semiconductor source electrode, and zener diode cathode is connect with metal-oxide-semiconductor grid, and transient state inhibits two poles
Pipe anode is connect with metal-oxide-semiconductor source electrode, and Transient Suppression Diode cathode and metal-oxide-semiconductor drain electrode connect.
4. the design method that a kind of power supply as described in claims 1 to 3 is any delays electrification circuit, which is characterized in that including step
It is rapid:
Driving voltage Vmos, which is preset, according to power supply voltage Vu and metal-oxide-semiconductor grid source determines first resistor resistance value R1, second resistance
The ratio of resistance value R2；
Metal-oxide-semiconductor is determined according to the rated current I of load and power supply voltage Vu；
Delay electrification circuit predetermined time delay t and metal-oxide-semiconductor cut-in voltage V according to the power supplyGSDetermine capacitor.
5. the design method that a kind of power supply as claimed in claim 4 delays electrification circuit, which is characterized in that
It is described that first resistor resistance value R1, the are determined according to power supply voltage Vu and scheduled metal-oxide-semiconductor grid source driving voltage Vmos
The ratio of two resistance R2, so that R1, R2 meet
6. the design method that a kind of power supply as claimed in claim 4 delays electrification circuit, which is characterized in that described according to load
Rated current I and power supply voltage Vu determine metal-oxide-semiconductor, so that the rated power P of metal-oxide-semiconductorD, conducting resistance RDSMeet: PD> I2
×RDS, the drain-source breakdown voltage BV of metal-oxide-semiconductorDSSMeet: BVDSS > Vu.
7. the design method that a kind of power supply as claimed in claim 4 delays electrification circuit, which is characterized in that the basis is predetermined to prolong
Slow time t and metal-oxide-semiconductor cut-in voltage VGSDetermine capacitor, so that the capacitance C1 of capacitor meets:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616810.2A CN110445484A (en) | 2019-07-09 | 2019-07-09 | A kind of power supply delays electrification circuit and design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616810.2A CN110445484A (en) | 2019-07-09 | 2019-07-09 | A kind of power supply delays electrification circuit and design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110445484A true CN110445484A (en) | 2019-11-12 |
Family
ID=68429991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910616810.2A Pending CN110445484A (en) | 2019-07-09 | 2019-07-09 | A kind of power supply delays electrification circuit and design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110445484A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446689A (en) * | 2020-04-13 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | Overcurrent protection circuit with alarming and time-delay self-recovery functions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718635Y (en) * | 2004-03-03 | 2005-08-17 | 中兴通讯股份有限公司 | Multi-power source charging sequential control circuit |
| CN106026626A (en) * | 2016-06-29 | 2016-10-12 | 浪潮集团有限公司 | Surge current suppressor based on RC time delay circuit |
| CN208078890U (en) * | 2018-04-17 | 2018-11-09 | 洛阳隆盛科技有限责任公司 | A kind of circuit that can inhibit direct current inrush current |
| CN108879648A (en) * | 2017-05-15 | 2018-11-23 | 华为技术有限公司 | A kind of power protecting circuit |
-
2019
- 2019-07-09 CN CN201910616810.2A patent/CN110445484A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718635Y (en) * | 2004-03-03 | 2005-08-17 | 中兴通讯股份有限公司 | Multi-power source charging sequential control circuit |
| CN106026626A (en) * | 2016-06-29 | 2016-10-12 | 浪潮集团有限公司 | Surge current suppressor based on RC time delay circuit |
| CN108879648A (en) * | 2017-05-15 | 2018-11-23 | 华为技术有限公司 | A kind of power protecting circuit |
| CN208078890U (en) * | 2018-04-17 | 2018-11-09 | 洛阳隆盛科技有限责任公司 | A kind of circuit that can inhibit direct current inrush current |
Non-Patent Citations (2)
| Title |
|---|
| 何希才，尤克编: "《最新功率半导体器件应用技术》", 31 March 1995 * |
| 黄均鼐，汤庭鳌，胡光喜编著: "半导体器件原理", 北京理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446689A (en) * | 2020-04-13 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | Overcurrent protection circuit with alarming and time-delay self-recovery functions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101882864B (en) | Electrifying startup circuit and electrifying startup method thereof | |
| CN101325411B (en) | Slow starting circuit for electrifying DC power supply | |
| CN112993953B (en) | High-voltage surge suppression circuit | |
| CN107027334A (en) | Surge current prevents circuit | |
| US20160134279A1 (en) | Method and circuit for recharging a bootstrap capacitor using a transfer capacitor | |
| CN112491255B (en) | Voltage-sharing circuit, flying capacitor three-level converter and equipment | |
| CN105762781B (en) | Surge current control circuit and power supply unit | |
| CN103004091A (en) | Circuit arrangement and method for limiting the current level and/or flank gradient of electrical signals | |
| CN114679055B (en) | Switching power supply circuit and terminal equipment | |
| EP3985853A1 (en) | Three-level boost circuit and multi-output parallel system | |
| CN110445484A (en) | A kind of power supply delays electrification circuit and design method | |
| CN102035370B (en) | Charge pump circuit with current detection function and circuit unit thereof | |
| US9910811B2 (en) | Hot swap circuit | |
| CN110855130B (en) | Power supply input clamping circuit and chip | |
| JP2003108243A (en) | Circuit apparatus for voltage control | |
| CN108512191B (en) | Surge protection circuit, electronic equipment and surge protection method of circuit | |
| CN210985660U (en) | Anti-reverse-filling circuit | |
| CN110445216B (en) | Charging chip | |
| CN107947556A (en) | A kind of Switching Power Supply start-up circuit | |
| US10122266B1 (en) | Power supply charge pump and protection circuit | |
| CN112133238B (en) | Drive circuit and electronic device | |
| CN101166388B (en) | Backlight lamp tube short circuit and open circuit protection circuit | |
| CN208767783U (en) | Electric discharge device | |
| CN116979819A (en) | Power supply circuit of synchronous rectifier, power supply device and power supply equipment | |
| CN203980198U (en) | A kind of New-type fluorescent lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |