CN108155788A - A kind of adjustable energy supply startup control circuit of voltage threshold - Google Patents
A kind of adjustable energy supply startup control circuit of voltage threshold Download PDFInfo
- Publication number
- CN108155788A CN108155788A CN201711292878.7A CN201711292878A CN108155788A CN 108155788 A CN108155788 A CN 108155788A CN 201711292878 A CN201711292878 A CN 201711292878A CN 108155788 A CN108155788 A CN 108155788A
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- Prior art keywords
- triode
- resistance
- control circuit
- voltage
- startup control
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Classifications
-
- 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
- H02M3/156—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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention relates to a kind of adjustable energy supply startup control circuits of voltage threshold, belong to computer application technology.The present invention can judge supply voltage amplitude, control power module Enable Pin level, the conversion output of delayed start-up power module, and during so as to ensure that power up supply voltage waveform is severe, power module output is stablized normal.A kind of adjustable energy supply startup control circuit of voltage threshold is realized improves airborne DC equipment internal electric source module output waveform under external power supply output waveform abnormal conditions, so as to ensure the function of normally starting of airborne DC equipment.Supply voltage amplitude can be judged by the adjustable supply voltage decision circuitry of voltage threshold by specifically referring to the circuit, by the conversion of delayed startup control circuit delayed start-up power module, so as to eliminate the influence that mains ripple exports power module in power up.
Description
Technical field
The invention belongs to computer application fields, and in particular to a kind of adjustable energy supply startup control circuit of voltage threshold.
Background technology
Airborne direct-flow electricity utilization apparatus is airborne by power reguirements related in aircraft electrical supply parameters, and in practical applications
Or the DC suppling equipment on ground causes power supply poor quality, wave when being powered in particular for piezoelectric voltage due to various factors
Shape very severe has exceeded the regulation of straight-flow system normal transients envelope in related power reguirements.Direct current supply voltage powers on
Poor quality influences the power module conversion output voltage inside airborne DC electronic equipment, further affects machine product
Normal work.
In view of above-described limitation and defective, the present inventor furthers investigate for the prior art, and has this case production
It is raw.
Invention content
The present invention proposes a kind of adjustable energy supply startup control circuit of voltage threshold, can be adjustable by voltage threshold
Supply voltage decision circuitry judges supply voltage amplitude, controls the Enable Pin of power module, the conversion of delayed start-up power module,
Supply voltage is in case of fluctuating during delay, and when amplitude is less than power module operation threshold, power module immediately turns off
Output, while timing is reset, and judges that delay control circuit rejudges supply voltage amplitude and stabilization time, delayed start-up power supply
The conversion of module.Output voltage caused by being fluctuated in this way to avoid supply voltage when powering on is unstable, so as to ensure power supply mould
Block output is stablized normal.
It is an object of the invention to start control circuit by designing a kind of adjustable judgement of voltage threshold, in externally fed
Improve airborne DC equipment internal electric source module output waveform under power supply output waveform abnormal conditions, so as to ensure that airborne direct current is set
Standby normal startup.
The detailed technical solution of the present invention is as follows：A kind of adjustable energy supply startup control circuit of voltage threshold, being connected to band makes
The power module input terminal at energy end, including supply voltage decision circuitry and delayed startup control circuit.The supply voltage judges
Circuit is Two-port netwerk circuit (various informative, can be realized by modes such as voltage-stabiliser tube, comparison circuits), can realize that supply voltage is sentenced
Disconnected function.The delayed startup control circuit is by resistance A (R1), resistance B (R2), resistance C (R3), diode (V1), diode
(V2), triode (V3) and triode (V4) composition can control the Enable Pin level of power module.The supply voltage judges
Circuit is just terminated at input direct-current busbar anode, the base stage of negative terminal and the triode (V4) in the delayed startup control circuit
Connection, while one end of resistance C (R3) is connected, the another of resistance C (R3) is terminated at input direct-current busbar ground wire.Triode (V4)
Emitter be connected directly between the ground wire of input direct-current busbar.Collector connection resistance B (R2) one end of triode (V4), simultaneously
The base stage of connecting triode (V3), the another of resistance B (R2) are terminated at input direct-current busbar anode.The emitter of triode (V3)
Connect input direct-current busbar ground wire.Collector connection resistance A (R1) one end of triode (V3) and the cathode of diode (V1)；Electricity
The cathode of the other end connection diode (V2) of A (R1) is hindered, the anode of diode (V2) is connected on input direct-current busbar anode；Two poles
Anode connection delay capacitor (C1) anode of (V1) is managed, while connects the Enable Pin of power module, the cathode of capacitance (C1) is connected to
Input direct-current busbar ground wire.
Wherein, diode (V1) is identical with diode (V2) model parameter；Triode (V3) and triode (V4) type
Number parameter is identical.
Diode (V1) and the reversed pressure voltage of diode (V2) should be higher than that input direct-current bus voltage value；Triode (V3)
With the collector of triode (V4) input direct-current bus voltage value is should be higher than that with transmitting interpolar pressure voltage.
The triode (V3) and triode (V4) are NPN type.
The electric current that flows through of collector, which is less than in device handbook, when the resistance value of resistance A (R1) should be connected triode (V3) provides
Collector current upper limit value；The resistance value of resistance B (R2) should make the electric current that collector flows through during triode (V4) conducting be less than device
Defined collector current upper limit value on part handbook；The resistance value of resistance C (R3) is 10k Ω~20k Ω.
The capacitance of capacitance (C1) should be according to the significant level value and output current value of power module enable pin and setting
Delay time depending on.
The supply voltage control circuit has the adjustable supply voltage arbitration functions of voltage threshold, when supply voltage meets
During power module power reguirements, the delayed startup control circuit work, when delay reaches, power module powers on；Conversely, institute
It states supply voltage decision circuitry and the control signal of the delayed startup control circuit is pulled low to zero level, timing does not start, electricity
Source module can not power on.
The delayed startup control circuit has delayed startup control function, and has antijamming capability.Work as externally fed
When voltage is not achieved power module operation threshold or beats near power module operation threshold, timing does not start, power supply mould
Block can not power on；When externally fed voltage reaches power module operation threshold and after a period of stabilisation, timing starts, and works as delay
During arrival, power module works on power.
The present invention design the advantages of be：(1) supply voltage can be set to judge according to the minimum operating voltage value of power module
Circuit voltage threshold value, adapting to different input voltage condition (2) the start-up study time can be set by changing capacitor's capacity
It puts, degree of freedom is high；Delay capacitor electric discharge is rapid, can be continuously upper and lower electric；(3) the compatible various power modules with Enable Pin,
The circuit theory of power module need not be changed, only increase this circuit in the peripheral circuit of power module to solve the problems, such as, cost
Low, cost is small；(4) circuit structure is simple, using passive device, it is easy to accomplish, it is simple and reliable.
Description of the drawings
The above-mentioned description as described in the content of present invention will become more fully apparent and be readily appreciated that in conjunction with the following drawings, wherein：
Fig. 1 is the power module schematic diagram for having Enable Pin；
Fig. 2 is the circuit diagram of the present invention.
R1- resistance A, R2- resistance B, R3- resistance C, V1- diode, V2- diodes, V3- triodes, V4- triodes,
C1- capacitances, N1- power modules.
Specific embodiment
As shown in Figure 1, to have the power module schematic diagram of Enable Pin, it is widely used to airborne DC electronic at present and sets
It is standby.When Enable Pin is high level, power module can be exported normally, when Enable Pin is grounded, the output shutdown of power module.
The adjustable energy supply startup control circuit schematic diagram of a kind of voltage threshold proposed by the present invention is as shown in Figure 2.Work as outside
After power supply starts, DC voltage is begun to ramp up, when its voltage is less than power module work minimum voltage threshold value, power supply electricity
Press decision circuitry to triode (V4) base stage without output current, triode (V4) is not turned on, triode (V3) conducting, Enable Pin stream
The electric current gone out after diode (V1) by (V3) be conducting to ground, i.e., Enable Pin " is dragged down ", power cutoff module (N1) it is defeated
Go out.
When externally fed supply voltage is higher than power module work minimum voltage threshold value, supply voltage decision circuitry is to three
Pole pipe (V4) base stage output current, triode (V4) conducting, triode (V3) are not turned on, and the electric current of Enable Pin outflow can not be through two
Ground is conducting to by (V3) after pole pipe (V1), therefore Enable Pin starts to charge to capacitance (C1), during charging to capacitance (C1), makes
Energy end keeps the state of " being dragged down ", and the output of power module (N1) continues to be turned off, after capacitance (C1) charging complete,
Enabled terminal voltage puts height, that is, opens the output of power module (N1).Whether the delay in this stage has been charged with capacitance (C1)
As the criterion that delay terminates, the capacitance size of capacitance (C1) determines the time length of delay.
Delay capacitor (C1) is designed, its object is to externally fed power-supply fluctuation during inhibiting to power on to airborne secondary power supply
The influence of output voltage.Detailed process is as follows, and after externally fed power supply electrifying, supply voltage decision circuitry judges external electrical
Whether pressure reaches the minimum operation threshold of power module, if supply voltage reaches power module work minimum voltage threshold value, power supply
To triode (V4) output current, (C1) in rear class delay control circuit is started to charge up voltage decision circuitry, i.e., to power supply electricity
The stabilization time of pressure starts timing.When capacitor charging terminates, start-up study reaches, and Enable Pin puts high level, opens power module
Conversion, power module normally exports.If supply voltage fluctuates during powering on, amplitude works most less than power module
Low voltage threshold, supply voltage decision circuitry cut-out triode (V4) base current are kept it turned off, and triode (V3) is connected immediately,
Capacitance (C1) is discharged by (V3), and the voltage of capacitance is zero, while timing is reset, and supply voltage decision circuitry will restart to sentence
It is disconnected, it repeats the above process, until supply voltage reaches the minimum operation threshold of power module and after a period of stabilisation, power module
It can start to stablize output, so as to ensure that power module output is not influenced by power supply fluctuation during powering on.
The present invention is verified, and applied on multiple products by contrast test, achieves good result,
The power up of the power module with Enable Pin is effectively improved, it is severe in face of waveform to solve airborne direct-flow electricity utilization apparatus
Start voltage when occur output establish exception.
Claims (7)
1. a kind of adjustable energy supply startup control circuit of voltage threshold, is connected to the power module input terminal with Enable Pin, including supplying
Piezoelectric voltage decision circuitry and delayed startup control circuit, it is characterised in that：The supply voltage decision circuitry is Two-port netwerk circuit,
Realize supply voltage arbitration functions；The delayed startup control circuit is by resistance A (R1), resistance B (R2), resistance C (R3), two poles
(V1), diode (V2), triode (V3) and triode (V4) composition are managed, controls the Enable Pin level of power module；The confession
Piezoelectric voltage decision circuitry is just terminated at input direct-current busbar anode, negative terminal and the triode in the delayed startup control circuit
(V4) base stage connection, while one end of resistance C (R3) is connected, the another of resistance C (R3) is terminated at input direct-current busbar ground wire；
The emitter of triode (V4) is connected directly between the ground wire of input direct-current busbar；The collector connection resistance B of triode (V4)
(R2) one end, while the base stage of connecting triode (V3), the another of resistance B (R2) are terminated at input direct-current busbar anode；Three poles
Manage the emitter connection input direct-current busbar ground wire of (V3)；Collector connection resistance A (R1) one end of triode (V3) and two poles
Manage the cathode of (V1)；The cathode of the other end connection diode (V2) of resistance A (R1), the anode of diode (V2) are connected on input directly
Flow busbar anode；Anode connection delay capacitor (C1) anode of diode (V1), while connect the Enable Pin of power module, capacitance
(C1) cathode is connected to input direct-current busbar ground wire.
2. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Described
Two-port netwerk circuit is voltage-stabiliser tube, digital circuit or comparison circuit.
3. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Described three
Pole pipe (V3) and triode (V4) are NPN type.
4. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Described two
Pole pipe (V1) is identical with diode (V2) model parameter；Triode (V3) is identical with triode (V4) model parameter.
5. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Described two
Pole pipe (V1) and the reversed pressure voltage of diode (V2) should be higher than that input direct-current bus voltage value；Triode (V3) and triode
(V4) collector should be higher than that input direct-current bus voltage value with transmitting interpolar pressure voltage.
6. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Resistance A
(R1) resistance value should make the electric current that collector flows through during triode (V3) conducting be less than defined collector current in device handbook
Upper limit value；The electric current that flows through of collector, which is less than in device handbook, when the resistance value of resistance B (R2) should be connected triode (V4) provides
Collector current upper limit value；The resistance value of resistance C (R3) is 10k Ω~20k Ω.
7. a kind of adjustable energy supply startup control circuit of voltage threshold according to claim 1, it is characterised in that：Capacitance
(C1) capacitance is according to the significant level value and output current value of power module enable pin and depending on the delay time of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292878.7A CN108155788A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable energy supply startup control circuit of voltage threshold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292878.7A CN108155788A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable energy supply startup control circuit of voltage threshold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108155788A true CN108155788A (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711292878.7A Pending CN108155788A (en) | 2017-12-07 | 2017-12-07 | A kind of adjustable energy supply startup control circuit of voltage threshold |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000278108A (en) * | 1999-03-20 | 2000-10-06 | Nec Corp | Watchdog circuit and charging controller |
| CN203368422U (en) * | 2013-06-26 | 2013-12-25 | 深圳市朗驰欣创科技有限公司 | Chip enabling signal delay control circuit |
| CN103838284A (en) * | 2012-11-26 | 2014-06-04 | 西安威正电子科技有限公司 | Parallel LDO delay starting circuit |
| CN204118816U (en) * | 2014-10-20 | 2015-01-21 | 广东易事特电源股份有限公司 | Based on the emergency service circuit of UPS |
| CN106095040A (en) * | 2016-06-07 | 2016-11-09 | 青岛歌尔声学科技有限公司 | A kind of key control circuit and electronic product |
-
2017
- 2017-12-07 CN CN201711292878.7A patent/CN108155788A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000278108A (en) * | 1999-03-20 | 2000-10-06 | Nec Corp | Watchdog circuit and charging controller |
| CN103838284A (en) * | 2012-11-26 | 2014-06-04 | 西安威正电子科技有限公司 | Parallel LDO delay starting circuit |
| CN203368422U (en) * | 2013-06-26 | 2013-12-25 | 深圳市朗驰欣创科技有限公司 | Chip enabling signal delay control circuit |
| CN204118816U (en) * | 2014-10-20 | 2015-01-21 | 广东易事特电源股份有限公司 | Based on the emergency service circuit of UPS |
| CN106095040A (en) * | 2016-06-07 | 2016-11-09 | 青岛歌尔声学科技有限公司 | A kind of key control circuit and electronic product |
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Application publication date: 20180612 |