CN108832807A - A kind of miniaturization low power consumption switch power starting circuit and starting method - Google Patents
A kind of miniaturization low power consumption switch power starting circuit and starting method Download PDFInfo
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- CN108832807A CN108832807A CN201810917017.1A CN201810917017A CN108832807A CN 108832807 A CN108832807 A CN 108832807A CN 201810917017 A CN201810917017 A CN 201810917017A CN 108832807 A CN108832807 A CN 108832807A
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- power
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 62
- 230000005669 field effect Effects 0.000 claims description 63
- 230000006641 stabilisation Effects 0.000 claims description 7
- 238000011105 stabilization Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of miniaturization low power consumption switch power starting circuit and starting methods, including linear voltage regulator, control switch circuit, switching power circuit, capacitor C2, control circuit and power switch circuit, the input terminal of the linear voltage regulator connects to power supply, the first end of the output end and capacitor C2 of its output end and switching power circuit connects, the second end of capacitor C2 is grounded, the input terminal of the control circuit is connect with the first end of capacitor C2, its output end is connected through the reference edge of control switch circuit and linear voltage regulator, the input terminal of the power switch circuit is connect with the first end of capacitor C2, the feeder ear of the PWM controller of its output end and switching power circuit connects.The present invention is suitable for various Switching Power Supplies or DC/DC converter, can reduce the size of power module under high input voltage or system compact occasion, while guaranteeing that product normally exports, reduce power consumption, improve circuit reliability, provide guarantee safely for system.
Description
Technical field
The present invention relates to power technique fields, and in particular to a kind of miniaturization low power consumption switch power starting circuit and starting
Method.
Background technique
Switching Power Supply is widely used in space flight, aviation, ship, weapons, electricity as the DC/DC converter of secondary system power supply
In the military-civil electronic system such as son, railway, communication, medical electronics, industrial automation equipment.In Switching Power Supply design, PWM control
Device processed or the power supply circuit of control circuit have a great impact to power module design.In the not high field of some technical requirements
It closes, simplest power supply circuit is exactly by the way of linear voltage stabilization power supply.But with the miniaturization of electronic system, power supply mould
The size of block is smaller and smaller, and input voltage is higher and higher, and linear voltage stabilization power supply mode can not meet the design of power module
It is required that.
Summary of the invention
The purpose of the present invention is to provide a kind of miniaturization low power consumption switch power starting circuit and starting method, Neng Goushi
In the case of existing high input voltage, the low-power consumption power supply circuit of miniaturization is designed, and provides the supply voltage of high reliability to product.
To achieve the above object, the invention adopts the following technical scheme：
A kind of miniaturization low power consumption switch power starting circuit, including linear voltage regulator, control switch circuit, switch power supply
Road, capacitor C2, control circuit and power switch circuit, the input terminal of the linear voltage regulator connect to power supply, output end with
The connection of the first end of the output end of switching power circuit and capacitor C2, the second end ground connection of capacitor C2, the control circuit it is defeated
Enter end to connect with the first end of capacitor C2, output end is connected through the reference edge of control switch circuit and linear voltage regulator, described
The input terminal of power switch circuit is connect with the first end of capacitor C2, the PWM controller of output end and switching power circuit
Feeder ear connection.
As a further improvement of the above technical scheme：
The linear voltage regulator includes field effect transistor Q3, current-limiting resistance R1, zener diode Z1 and decoupling capacitance C1, described
The drain of field effect transistor Q3 connects to power supply, and source electrode is connect with the first end of capacitor C2, grid and zener diode
The second end of the connection of the first end of the cathode of Z1 and decoupling capacitance C1, the anode of zener diode Z1 and decoupling capacitance C1 with control
The output end of switching circuit processed connects.
The switching power circuit 2 includes PWM controller, field effect transistor Q4, transformer T1 and diode D1, described
Power switch circuit uses field effect transistor Q2；The feeder ear of the PWM controller and the drain of field effect transistor Q2 connect
It connects, the output end OUT of PWM controller is connected with the grid of field effect transistor Q4；The drain electrode and transformation of field effect transistor Q4
One end of the primary coil of device T1 is connected, and the source electrode of field effect transistor Q4 is connected with input ground；The primary coil of transformer T1
The other end is connected with the anode of diode D1, and the cathode of diode D1 is connect with the first end of capacitor C2, the field effect transistor
The source electrode of pipe Q2 is connect with the first end of capacitor C2, and grid is connect with linear voltage regulator.
The control switch circuit includes field effect transistor Q1 and discharge resistance R2；The drain electrode of field effect transistor Q1 point
It is not connected with the grid of field effect transistor Q2, Q3, the source electrode ground connection of field effect transistor Q1, the grid of field effect transistor Q1
It is connected with the output end of control circuit, the first end of discharge resistance R2 is connect with the grid of field effect transistor Q1, discharge resistance
The second end of R2 is connect with the source electrode of field effect transistor Q1.
The control circuit includes digitial controller and linear voltage regulator, the control terminal and field-effect of the digitial controller
The grid of transistor Q1 connects, and the output end of feeder ear and linear voltage regulator connects, the input terminal and capacitor of linear voltage regulator
The first end of C2 connects.
A kind of starting method minimizing low power consumption switch power supply, includes the following steps：
Linear voltage regulator and charging capacitor are connected in the input terminal of Switching Power Supply, is opened by linear voltage regulator to Switching Power Supply offer
Initial supply voltage, the voltage are powered when dynamic for control circuit；
When Switching Power Supply starts booting power-up, input voltage is controlled by field effect transistor to charging capacitor charging, when filling
Voltage on capacitor is after linear voltage regulator pressure stabilizing output, when reaching digitial controller normal work power reguirements, number
Controller enters low-power consumption mode and works, and obtains charging voltage from charging capacitor in Switching Power Supply, the charging capacitor made is without charging
Circuit, to start switch power work；
After Switching Power Supply works normally, switch power source output voltage is charged by diode pair charging capacitor, so that filling
Voltage stabilization on capacitor completes power initiation process.
As shown from the above technical solution, the low power consumption switch power starting circuit in the present invention passes through monitoring linear voltage regulator
Output voltage, when output voltage reaches certain voltage, so that digitial controller MCU enters normal operating conditions, it is digital control
Device MCU turns off linear voltage regulator by control switch, and starts switch the work of power supply simultaneously.Entire control circuit theory structure
Simply, long-term work state, power consumption very little is not present in linear regulator circuit, and high reliablity occupies little space.In linear voltage stabilization
Device shutdown after and Switching Power Supply work normally early period between, the power supply of control circuit is powered by capacitor C2, so capacitor C2
The capacitor for selecting capacity a little bigger；The start-up study of Simultaneous Switching electric power output voltage and starting time to design it is small as far as possible, in this way
Be conducive to the Miniaturization Design of Switching Power Supply.
Detailed description of the invention
Fig. 1 is circuit block diagram of the invention；
Fig. 2 is circuit diagram of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing：
As shown in Figure 1, the miniaturization low power consumption switch power starting circuit of the present embodiment, including linear voltage regulator 1, control switch
Circuit 3, switching power circuit 2, capacitor C2, control circuit 4 and power switch circuit 5, the input terminal and power supply of linear voltage regulator 1
Connection, the output end of linear voltage regulator 1 are connect with the first end of the output end of switching power circuit 2 and capacitor C2, capacitor C2's
Second end ground connection, the input terminal of control circuit 4 are connect with the first end of capacitor C2, and the output end of control circuit 4 is through control switch
Circuit 3 is connect with the reference edge of linear voltage regulator 1, and the input terminal of power switch circuit 5 is connect with the first end of capacitor C2, power
The output end of switching circuit 5 is connect with the feeder ear of the PWM controller of switching power circuit 2.
The input terminal of the control switch circuit 3 is connected with the output end of control circuit 4, the output end of control switch circuit 3
It is connected with the reference edge of linear voltage regulator 1, which is used for when voltage reaches certain voltage on C2, turns off line
Property voltage-stablizer 1 work, reduce the power consumption of power supply.Control circuit 4 is used to generate the control signal of control linear voltage regulator shutdown.Function
The supply voltage that rate switching circuit 5 is used to control PWM controller is connected to capacitor C2, to open the normal work of Switching Power Supply 2
Make.
As shown in Fig. 2, linear voltage regulator 1 include power field effect transistor Q3, current-limiting resistance R1, zener diode Z1 and
The drain of decoupling capacitance C1, power field effect transistor Q3 connect to power supply, the source electrode and capacitor of power field effect transistor Q3
The first end of C2 connects, and the first of the grid of power field effect transistor Q3 and the cathode of zener diode Z1 and decoupling capacitance C1
End connection, the anode of zener diode Z1 and the second end of decoupling capacitance C1 are connect with the output end of control switch circuit.It should
Linear voltage regulator 1 is for generating a stable initial supply voltage, for providing control switch circuit 3 stable power supply electricity
Pressure.
Switching power circuit 2 includes PWM controller, power field effect transistor Q4, transformer T1 and diode D1, power
Switching circuit uses power field effect transistor Q2；The feeder ear of PWM controller is connect with the drain of field effect transistor Q2,
The output end OUT of PWM controller is connected with the grid of power field effect transistor Q4；The drain electrode of power field effect transistor Q4 with
One end of the primary coil of transformer T1 is connected, and the source electrode of power field effect transistor Q4 is connected with input ground；Transformer T1's
The primary coil other end is connected with the anode of diode D1, and the cathode of diode D1 is connect with the first end of capacitor C2, field-effect
The source electrode of transistor Q2 is connect with the first end of capacitor C2, and grid is connect with linear voltage regulator.The switching power circuit 2 is used for
Power supply generates reliable and stable supply voltage after normally starting；
Control switch circuit 3 includes field effect transistor Q1 and discharge resistance R2；The drain electrode of field effect transistor Q1 respectively with field
The grid of effect transistor Q2, Q3 are connected, the source electrode ground connection of field effect transistor Q1, the grid of field effect transistor Q1 and control
The output end of circuit is connected, and the first end of discharge resistance R2 is connect with the grid of field effect transistor Q1, and the of discharge resistance R2
Two ends are connect with the source electrode of field effect transistor Q1.
Control circuit 4 includes digitial controller MCU and linear voltage regulator, the control terminal Ctrl of digitial controller MCU and field
The grid of effect transistor Q1 connects, and the feeder ear VDD of digitial controller MCU and the output end of linear voltage regulator connect, linearly
The input terminal IN of voltage-stablizer is connect with the first end of capacitor C2.The effect of control circuit 4 is when voltage reaches certain on capacitor C2
When voltage value, control exports control signal and gives control switch circuit 3 circuit.
Working principle：When Switching Power Supply has just started booting power-up, input voltage is by field effect transistor Q3 to capacitor
C2 charges, the grid voltage variation of the voltage follow field effect transistor Q3 on capacitor C2（Voltage and field-effect on capacitor
Transistor Q3 grid voltage differs Vgsth）, since field effect transistor Q3 grid connects zener diode Z1, so its grid
The voltage eventually stable VZ1 on fixed voltage.When the voltage on capacitor C2 by linear voltage regulator pressure stabilizing output after, reach
When digitial controller MCU works normally power reguirements, digitial controller MCU enters low-power consumption mode work, digital control at this time
The control signal control field effect transistor Q1 that device MCU exports high level is open-minded.Once field effect transistor Q1 is open-minded, capacitor C1
On voltage can be discharged to 0V or so.When the voltage on capacitor C1 is 0V, the field effect transistor Q3 of linear voltage regulator 1 is closed
Disconnected, the field effect transistor Q2 in power switch circuit 5 is open-minded.When field effect transistor Q3 shutdown and field effect transistor Q2 are opened
Logical moment, the PWM controller power supply in control circuit 4 and switching power circuit 2 are obtained from capacitor C2, and capacitor C2 is without filling at this time
Electrical circuit.When field effect transistor Q2 is opened, the power supply of voltage input PWM controller into Switching Power Supply 2 on capacitor C2
It holds on VDD, works to start switching power circuit 2.After switching power circuit 2 works normally, switch power supply
2 output voltage of road charges to capacitor C2 by diode D1, so that voltage stabilization on capacitor C2, so far entire power supply
Start-up course is completed, and product enters steady state operating conditions.
Switching Power Supply low-power consumption start-up circuit of the present invention and method, are suitable for various Switching Power Supplies or DC/DC becomes
Parallel operation, can be under high input voltage or system compact occasion, while guaranteeing that product normally exports, the size of power module
Very little can be designed, power consumption can be down to very low, to improve circuit reliability, provide guarantee safely for system.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (6)
1. a kind of miniaturization low power consumption switch power starting circuit, it is characterised in that：Including linear voltage regulator, control switch electricity
Road, switching power circuit, capacitor C2, control circuit and power switch circuit, the input terminal and power supply of the linear voltage regulator connect
It connects, the first end connection of the output end and capacitor C2 of output end and switching power circuit, the second end ground connection of capacitor C2 is described
The input terminal of control circuit is connect with the first end of capacitor C2, benchmark of the output end through control switch circuit and linear voltage regulator
End connection, the input terminal of the power switch circuit connect with the first end of capacitor C2, output end and switching power circuit
The feeder ear of PWM controller connects.
2. miniaturization low power consumption switch power starting circuit according to claim 1, it is characterised in that：The linear voltage stabilization
Device includes field effect transistor Q3, current-limiting resistance R1, zener diode Z1 and decoupling capacitance C1, the field effect transistor Q3's
Drain connects to power supply, and source electrode is connect with the first end of capacitor C2, cathode and the decoupling electricity of grid and zener diode Z1
Hold the first end connection of C1, the output of the anode of zener diode Z1 and the second end of decoupling capacitance C1 with control switch circuit
End connection.
3. miniaturization low power consumption switch power starting circuit according to claim 1, it is characterised in that：The Switching Power Supply
Circuit 2 includes PWM controller, field effect transistor Q4, transformer T1 and diode D1, and the power switch circuit is imitated using field
Answer transistor Q2；The feeder ear of the PWM controller is connect with the drain of field effect transistor Q2, the output end of PWM controller
OUT is connected with the grid of field effect transistor Q4；One end of the primary coil of the drain electrode and transformer T1 of field effect transistor Q4
It is connected, the source electrode of field effect transistor Q4 is connected with input ground；The primary coil other end of transformer T1 and the sun of diode D1
Extremely it is connected, the cathode of diode D1 is connect with the first end of capacitor C2, and the source electrode of the field effect transistor Q2 is with capacitor C2's
First end connection, grid are connect with linear voltage regulator.
4. miniaturization low power consumption switch power starting circuit according to claim 1, it is characterised in that：The control switch
Circuit includes field effect transistor Q1 and discharge resistance R2；The drain electrode of field effect transistor Q1 respectively with field effect transistor Q2,
The grid of Q3 is connected, the source electrode ground connection of field effect transistor Q1, the grid of field effect transistor Q1 and the output end of control circuit
It is connected, the first end of discharge resistance R2 is connect with the grid of field effect transistor Q1, the second end and field-effect of discharge resistance R2
The source electrode of transistor Q1 connects.
5. miniaturization low power consumption switch power starting circuit according to claim 1, it is characterised in that：
The control circuit includes digitial controller and linear voltage regulator, the control terminal and field effect transistor of the digitial controller
The grid of pipe Q1 connects, and the output end of feeder ear and linear voltage regulator connects, and the input terminal of linear voltage regulator is with capacitor C2's
First end connection.
6. a kind of starting method for minimizing low power consumption switch power supply, which is characterized in that include the following steps：
Linear voltage regulator and charging capacitor are connected in the input terminal of Switching Power Supply, is opened by linear voltage regulator to Switching Power Supply offer
Initial supply voltage, the voltage are powered when dynamic for control circuit；
When Switching Power Supply starts booting power-up, input voltage is controlled by field effect transistor to charging capacitor charging, when filling
Voltage on capacitor is after linear voltage regulator pressure stabilizing output, when reaching digitial controller normal work power reguirements, number
Controller enters low-power consumption mode and works, and obtains charging voltage from charging capacitor in Switching Power Supply, the charging capacitor made is without charging
Circuit, to start switch power work；
After Switching Power Supply works normally, switch power source output voltage is charged by diode pair charging capacitor, so that filling
Voltage stabilization on capacitor completes power initiation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810917017.1A CN108832807A (en) | 2018-08-13 | 2018-08-13 | A kind of miniaturization low power consumption switch power starting circuit and starting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810917017.1A CN108832807A (en) | 2018-08-13 | 2018-08-13 | A kind of miniaturization low power consumption switch power starting circuit and starting method |
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| Publication Number | Publication Date |
|---|---|
| CN108832807A true CN108832807A (en) | 2018-11-16 |
Family
ID=64153236
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810917017.1A Pending CN108832807A (en) | 2018-08-13 | 2018-08-13 | A kind of miniaturization low power consumption switch power starting circuit and starting method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754387A (en) * | 1987-01-27 | 1988-06-28 | Zenith Electronics Corporation | Start-up circuit for a switch mode power supply |
| US20150257231A1 (en) * | 2014-03-05 | 2015-09-10 | Cirrus Logic, Inc. | Digitally-controlled switch-mode start-up circuit with dimmer compatibility for led-based lights |
| CN106452040A (en) * | 2016-10-20 | 2017-02-22 | 广州金升阳科技有限公司 | Starting circuit |
| CN206807283U (en) * | 2017-04-28 | 2017-12-26 | 深圳市源尤电源科技有限公司 | A kind of start-up circuit of Switching Power Supply |
| CN208508789U (en) * | 2018-08-13 | 2019-02-15 | 中国电子科技集团公司第四十三研究所 | A kind of miniaturization low power consumption switch power starting circuit |
-
2018
- 2018-08-13 CN CN201810917017.1A patent/CN108832807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754387A (en) * | 1987-01-27 | 1988-06-28 | Zenith Electronics Corporation | Start-up circuit for a switch mode power supply |
| US20150257231A1 (en) * | 2014-03-05 | 2015-09-10 | Cirrus Logic, Inc. | Digitally-controlled switch-mode start-up circuit with dimmer compatibility for led-based lights |
| CN106452040A (en) * | 2016-10-20 | 2017-02-22 | 广州金升阳科技有限公司 | Starting circuit |
| CN206807283U (en) * | 2017-04-28 | 2017-12-26 | 深圳市源尤电源科技有限公司 | A kind of start-up circuit of Switching Power Supply |
| CN208508789U (en) * | 2018-08-13 | 2019-02-15 | 中国电子科技集团公司第四十三研究所 | A kind of miniaturization low power consumption switch power starting circuit |
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