CN108173426A - A kind of start-up circuit of low conduction voltage drop - Google Patents
A kind of start-up circuit of low conduction voltage drop Download PDFInfo
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- CN108173426A CN108173426A CN201810161361.2A CN201810161361A CN108173426A CN 108173426 A CN108173426 A CN 108173426A CN 201810161361 A CN201810161361 A CN 201810161361A CN 108173426 A CN108173426 A CN 108173426A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback 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
- H02M1/0048—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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention provides a kind of start-up circuit of low conduction voltage drop, input voltage can be detected in real time, when detecting input voltage less than setting voltage value, N metal-oxide-semiconductors are connected, so that the output voltage of start-up circuit and the pressure difference of input voltage are extremely low, ensure that rear class booster circuit starts voltage and follows input voltage substantially；When detecting input voltage higher than setting voltage value, start-up circuit output voltage is limited in the work input voltage range of late-class circuit by voltage limiting circuit work.
Description
Technical field
The present invention relates to a kind of start-up circuit, more particularly to a kind of start-up circuit of low conduction voltage drop.
Background technology
Start-up circuit is widely used in field of switch power.In Switching Power Supply product, no matter primary power source (AC-DC convert
Device) or secondary power supply (DC-DC converter), it is required for obtaining energy from input terminal, and provide a metastable power supply
Voltage is rear class control circuit or control IC power supplies, thus by control circuit work come driving switch break-make, control inductive
Device periodically transmits energy.
In general Switching Power Supply, when starting voltage less than control circuit or control IC minimums to solve input voltage, control
Circuit processed or control IC are unable to normal condition because that can not obtain sufficiently high supply voltage, cause corresponding Switching Power Supply
The problem of cannot be started up, can be used two-stage power supply circuit (such as Fig. 1 structures), and first order circuit arrives wide input voltage limitation clamper
One relatively low voltage value, second level circuit by booster circuit (such as BOOST circuits) by prime boost in voltage to meet control
Circuit or the normal working voltage of control IC work so that switch power supply system can start work.But due to voltage clamping
The pressure drop of circuit input and output side itself is larger so that the input supply voltage of second level booster circuit reduces, and leads to second
Grade booster circuit can not work normally, final so that in low input, it is impossible to IC normal power supplies in order to control.
As shown in Figure 2 (load is rear class booster circuit), circuit operation principle is conventional voltage clamp circuit scheme：Product
Be powered moment, triode Q1 conductings, the emitter current of triode Q1 charges rapidly to capacitance C2, when capacitance C2 voltages (namely
The output plus terminal of start-up circuit is supplied to the voltage of the feeder ear Vcc of control IC) the voltage stabilizing value that rises to zener diode D1 subtracts
When going the base stage of triode Q1 with emitter conduction voltage drop, stabilization is not further added by by Vcc voltage, reaches boosting electricity in Vcc voltage
During the operating voltage of road, booster circuit is started to work, it is established that rear class control circuit or the supply voltage for controlling IC, but circuit
In operating on low voltage, triode Q1 is operated in amplification region, and pressure drop is larger on triode Q1 and resistance R2, reduces Vcc under low pressure
Voltage value, cause second level booster circuit that can not work normally so that switch power supply system is difficult to when Vin is relatively low
Start.With other kinds of regulator circuit or voltage clamp circuit, it also will appear the problem of pressure difference is excessive under low pressure.
In conclusion wide-voltage range Switching Power Supply start-up circuit is confined in industry at present：It is powered using two-stage electric
The product of road scheme or single-stage power supply circuit scheme, first order voltage clamp circuit will appear input and output pressure difference mistake under low pressure
Greatly so that the problem of booster circuit or rear class control circuit can not start can not meet the startup from extremely low voltage to high voltage
Voltage range.
Invention content
Have in view of that, the present invention proposes a kind of start-up circuit of low conduction voltage drop, and input voltage can be examined in real time
It surveys, when detecting input voltage less than setting voltage value, N-MOS pipes conducting so that the output voltage of start-up circuit and input
The pressure difference of voltage is extremely low, ensures that rear class booster circuit starts voltage and follows input voltage substantially；When detecting that input voltage is higher than
When setting voltage value, voltage limiting circuit work, the work that start-up circuit output voltage is limited in rear class booster circuit inputs
In voltage range.
The present invention itself loss it is extremely low, when input voltage be low-voltage when, driving circuit be lost in itself it is relatively low, simultaneously as
It is managed using N-MOS, the N-MOS pipes saturation conduction in operating on low voltage, the conducting resistance of start-up circuit is extremely low；In high-pressure work,
Voltage limiting circuit, which can be used to meet, is lost relatively low voltage stabilizing or pressure limiting circuit, has both ensured start-up circuit under high input voltage
Normal work, and reduce the loss of start-up circuit work.
The start-up circuit of a kind of low conduction voltage drop of the present invention, including voltage limiting circuit, N-MOS pipes and driving electricity
Road.The visible Fig. 3 of concrete principle block diagram.
The input terminal connection input voltage vin of the driving circuit, generates after carrying out voltage sample to input voltage vin
Voltage Vg, the control voltage Vg is controlled to export to the grid of N-MOS pipes, the drain electrode of N-MOS pipes connects input voltage vin, N-
The source electrode of MOS pipes is connected to the output terminal of start-up circuit, powers for late-class circuit；The input terminal of voltage limiting circuit and output
End is connected to drain electrode and the source electrode of N-MOS pipes；
The driving circuit, which is equipped with, judges voltage range, judges electricity when the input voltage vin is less than driving circuit
During minimum value between pressure area, N-MOS pipes conducting, by the voltage limiting circuit short circuit, the source electrode by N-MOS pipes is
Late-class circuit is powered；
When the input voltage vin is when driving circuit is judged in voltage range, the N-MOS is managed and the electricity
Pressure limiting circuit is all connected, and is powered jointly for late-class circuit by the source electrode of N-MOS pipes and the output terminal of voltage limiting circuit；
When the input voltage vin judges the maximum value of voltage range more than driving circuit, the N-MOS pipes close
It is disconnected, it is powered by the output terminal of the voltage limiting circuit for late-class circuit.
Preferably, the voltage limiting circuit is the electricity that input voltage vin is converted to stable output voltage range
Pressure clamp circuit or the regulator circuit that input voltage vin is converted to fixed output voltage values.
Preferably, the voltage clamp circuit includes the first chip, the input terminal connection input electricity of first chip
Press Vin, the ground terminal ground connection of first chip, the source electrode of the output terminal connection N-MOS pipes of first chip.
Preferably, the regulator circuit includes second resistance, 3rd resistor, the first NPN triode, the first capacitance and the
Two zener diodes；The second resistance is connected between the collector of input voltage vin and the first NPN triode, described
3rd resistor be connected between the base stage of input voltage vin and the first NPN triode；The base of first NPN triode
The cathode of pole connection second zener diode, the output terminal of the emitter connection driving circuit of the first NPN triode
VDD；The anode connection ground of second zener diode；First capacitance connection is in the output terminal VDD of driving circuit
Between ground.
Preferably, the driving circuit include first resistor and the first zener diode, the one of the first resistor
End is connected to input voltage vin, and the other end of first resistor is connected, and connect with the cathode of first zener diode
Output terminal output control voltage Vg of the point as driving circuit, the anode of the first zener diode and ground connection.
Preferably, the voltage stabilizing value of first zener diode is less than the voltage stabilizing value of the second zener diode.
Preferably, the driving circuit judges voltage stabilizing value of the minimum value for the first zener diode of voltage range, institute
The driving circuit stated judges the maximum value of voltage range for the voltage stabilizing value of the first zener diode and the threshold voltage of N-MOS pipes
The sum of.
Compared with prior art, the present invention has following remarkable result：
1st, the present invention using N-MOS pipes come the output voltage of start-up circuit when controlling low pressure, open by so as to ensure low pressure when
Dynamic circuit output voltage is basically identical with input voltage, meets the power demands under rear class booster circuit low pressure.
2nd, circuit structure of the present invention employs the regulator circuit of wide input voltage range or the voltage of clamp circuit composition
Limiting circuit, start-up circuit output voltage is not excessively high during so as to ensure high input voltage, meets under rear class booster circuit high pressure
Input voltage range.
3rd, present invention loss itself is extremely low, the voltage limiting circuit formed using low-loss constant current voltage limiting chip, driving
The voltage sample loss of circuit is also smaller, will not be lost due to overflow means circuit characteristic increasing circuit itself.
Description of the drawings
Fig. 1 is the functional block diagram of traditional wide input range start-up circuit for meeting low pressure input；
Fig. 2 is traditional voltage clamp circuit schematic diagram；
Fig. 3 is the principle of the present invention block diagram；
Fig. 4 is the schematic diagram of first embodiment of the invention；
Fig. 5 is the schematic diagram of second embodiment of the invention；
Fig. 6 is the application principle figure of first embodiment of the invention；
Fig. 7 is the application principle figure of second embodiment of the invention.
Specific embodiment
Fig. 3 shows functional block diagram, it then follows the connection relation of above-mentioned initial technical solution.First branch illustrates this hair
Bright 3 features having：
1st, external powering device works normally, and when input voltage judges the minimum value of voltage range less than driving circuit, opens
Dynamic circuit
Output voltage and input voltage almost without pressure difference.
2nd, external powering device work normally, input voltage when driving circuit is judged in voltage range, start-up circuit
Output electricity
The pressure difference with input voltage is pressed slowly to increase with the increase of input voltage.
3rd, external powering device works normally, and when input voltage judges the maximum value of voltage range more than driving circuit, opens
Dynamic voltage
Output voltage stabilization is in a voltage value or stablizes in an output voltage range, the variation nothing with input voltage
It closes.
First embodiment
Voltage limiting circuit, N-MOS pipes and the driving circuit of the present invention, the input terminal connection input voltage of driving circuit
Vin exports generation control voltage Vg, the control voltage Vg after input voltage vin progress voltage sample to the grid of N-MOS pipes
Pole, the drain electrode connection input voltage vin of N-MOS pipes, the source electrode of N-MOS pipes are connected to late-class circuit, power for late-class circuit；
The input terminal and output terminal of voltage limiting circuit are connected to drain electrode and the source electrode of N-MOS pipes.
For each circuit module, above 3 features are specifically described using circuit in detail below with reference to attached drawing 4
It is as follows：
N-MOS pipes TR1 selection depletion type N-MOS pipes, being more than a certain negative value VT in Vgs voltages can be connected.
Voltage limiting circuit is a voltage clamp circuit, including 1 and first capacitance C1, IC1 tool of constant current voltage limiting chip IC
There is following characteristic：When output voltage VDD is less than setting voltage value, output voltage VDD follows input voltage vin, when output electricity
When pressure is higher than limitation voltage value, output voltage VDD is limited in a voltage range less than setting voltage value.
Driving circuit includes first resistor R1 and the first zener diode Z1.
The input terminal of first chip IC 1 is connected with Vin, and the output terminal VDD of IC1 is connected with late-class circuit,
IC1 ground terminals are grounded；The D poles of the N-MOS pipes TR1 are connected with Vin, and the output terminal VDD of the S poles connection IC1 of TR1 is simultaneously
And late-class circuit is connected jointly, the G poles of TR1 are connected with the cathode of the first zener diode Z1；First electricity
One end of resistance R1 is connected to Vin, and the other end is connected with the cathode of the first zener diode Z1, and tie point is as drive
The anode of output terminal output control the voltage Vg, Z1 of dynamic circuit and ground connection；The first capacitance C1 is connected to the output terminal of IC1
Between VDD and ground.
The course of work of the present invention is described as follows with reference to Fig. 4：
Feature 1 is worked normally for electric installation, when input voltage judges the minimum value of voltage range less than driving circuit, is started
Circuit output voltage is with input voltage almost without pressure difference：
When input voltage is not up to the voltage stabilizing value of zener diode Z1, zener diode Z1 is in cut-off state, input electricity
Vin is pressed to charge by resistance R1 to G, S capacitance and capacitance C1 of N-MOS pipes TR1 so that the G of N-MOS pipes TR1 is extremely to GND's
Voltage is equal to input voltage vin, and the G pole tensions of N-MOS pipes TR1 are more than S pole tensions, N-MOS pipes TR1 conductings so that start electricity
The output voltage on road is with input voltage almost without pressure difference.
Feature 2 is worked normally for electric installation, and input voltage is when driving circuit is judged in voltage range, start-up circuit output
The pressure difference of voltage and input voltage slowly increases with the increase of input voltage：
When input voltage is gradually increased to the voltage stabilizing value more than zener diode Z1, and the voltage stabilizing less than zener diode Z1
When being worth the voltage value being added with the absolute value of the threshold voltage VT of N-MOS pipes TR1, the output signal Vg voltages of driving circuit
For value stabilization in the voltage stabilizing value of zener diode Z1, N-MOS pipes enter amplification region, and electric current is managed and IC1 by N-MOS between Vin and VDD
It is common to provide, during Vin slowly rises, the pressure difference between start-up circuit output voltage VDD and Vin follow N-MOS pipes into
Enter amplification region and slowly increase.
Feature 3 is worked normally for electric installation, when input voltage judges the maximum value of voltage range more than driving circuit, is started
Circuit output voltage stabilization is in a voltage value or stablizes in an output voltage range, unrelated with the variation of input voltage：
When input voltage vin judges the maximum value of voltage range more than driving circuit, i.e., input voltage vin is more than voltage stabilizing
During the voltage value that the voltage stabilizing value of diode Z1 is added with the threshold voltage VT of N-MOS pipes TR1, N-MOS pipes enter cut-off region,
Electric current is only provided by IC1 between Vin and VDD, and start-up circuit output voltage VDD is directly determined by the stabilizing voltage characteristic of IC1, and will
Output voltage stabilization is in the range of the output voltage limiting value of IC1.
Second embodiment
The present embodiment and first embodiment difference lies in：
Voltage limiting circuit is a regulator circuit, including second resistance R2,3rd resistor R3, the first NPN triode Q1,
First capacitance C2 and the second zener diode Z2.
The second resistance R2 is connected between input voltage vin and the C poles of the first NPN triode Q1, and described
Three resistance R3 are connected between input voltage vin and the B poles of the first NPN triode Q1；The B of first NPN triode Q1
The cathode of the pole connection second zener diode Z2, E poles connect the output terminal VDD of driving circuit；Second voltage stabilizing
The anode connection ground GND of diode Z2；The first capacitance C1 be connected to the output terminal VDD of driving circuit and ground GND it
Between.
The voltage stabilizing value of first zener diode Z1 need to be less than the voltage stabilizing value of the second zener diode Z2, such as two pole of the first voltage stabilizing
Pipe Z1 selects the zener diode of 5.1V, and the second zener diode Z2 selects the zener diode of 12V
The course of work of the present invention is described as follows with reference to Fig. 5：
Feature 1 is worked normally for electric installation, when input voltage judges the minimum value of voltage range less than driving circuit, is started
Circuit output voltage is with input voltage almost without pressure difference：
When input voltage is not up to the voltage stabilizing value of zener diode Z1, zener diode Z1 is in cut-off state, input electricity
Vin is pressed to charge by resistance R1 to G, S capacitance and capacitance C1 of N-MOS pipes TR1 so that the G of N-MOS pipes TR1 is extremely to GND's
Voltage is equal to input voltage vin, and the G pole tensions of N-MOS pipes TR1 are more than S pole tensions, N-MOS pipes TR1 conductings so that start electricity
The output voltage on road is with input voltage almost without pressure difference.
Feature 2 is worked normally for electric installation, and input voltage is when driving circuit is judged in voltage range, start-up circuit output
The pressure difference of voltage and input voltage slowly increases with the increase of input voltage：
When input voltage is gradually increased to the voltage stabilizing value more than zener diode Z1, and is less than, zener diode Z1's is steady
During the voltage value that pressure value is added with the absolute value of the threshold voltage VT of N-MOS pipes TR1, the output signal Vg voltages of driving circuit
For value stabilization in the voltage stabilizing value of zener diode Z1, N-MOS pipes enter amplification region, between Vin and VDD electric current by N-MOS manage with by
The linear voltage-stabilizing circuit of R2, R3, Q1 and Z2 composition provides jointly, during Vin slowly rises, start-up circuit output voltage
Pressure difference between VDD and Vin follows N-MOS pipes to enter amplification region and slowly increase.
Feature 3 is worked normally for electric installation, when input voltage judges the maximum value of voltage range more than driving circuit, is started
Circuit output voltage stabilization is in a voltage value or stablizes in an output voltage range, unrelated with the variation of input voltage：
When input voltage vin judges the maximum value of voltage range more than driving circuit, i.e., input voltage vin is more than voltage stabilizing
During the voltage value that the voltage stabilizing value of diode Z1 is added with the threshold voltage VT of N-MOS pipes TR1, N-MOS pipes enter cut-off region,
Electric current is only provided by the linear voltage-stabilizing circuit that R2, R3, Q1 and Z2 are formed between Vin and VDD, and start-up circuit output voltage VDD is straight
The stabilizing voltage characteristic decision by R2, R3, Q1 and Z2 linear voltage-stabilizing circuit formed is connect, and by output voltage stabilization in zener diode
The voltage stabilizing value of Z1 subtracts the body diode pressure drop of B, E of triode Q1.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as this
The limitation of invention, on the basis of Fig. 3 functional block diagrams of the present invention, for those skilled in the art, not
It is detached from the spirit and scope of the present invention, alternatively improved and retouching can also be made, these improve and retouch also in the present invention
Protection domain, no longer repeated here with embodiment, protection scope of the present invention should using claim limited range as
It is accurate.
Claims (7)
1. a kind of start-up circuit of low conduction voltage drop, it is characterised in that：Including N-MOS pipes, driving circuit and voltage limiting circuit；
The input terminal connection input voltage vin of the driving circuit, control is generated after voltage sample is carried out to input voltage vin
Voltage Vg, the control voltage Vg are exported to the grid of N-MOS pipes, the drain electrode connection input voltage vin of N-MOS pipes, N-MOS pipes
Source electrode be connected to the output terminal of start-up circuit, power for late-class circuit；Input terminal and the output terminal difference of voltage limiting circuit
It is connected to drain electrode and the source electrode of N-MOS pipes；
The driving circuit, which is equipped with, judges voltage range, when the input voltage vin judges voltage zone less than driving circuit
Between minimum value when, N-MOS pipes conducting is rear class by the source electrode of N-MOS pipes by described voltage limiting circuit short circuit
Circuit is powered；
When the input voltage vin is when driving circuit is judged in voltage range, N-MOS pipes and the voltage limit
Circuit processed is all connected, and is powered jointly for late-class circuit by the source electrode of N-MOS pipes and the output terminal of voltage limiting circuit；
When the input voltage vin judges the maximum value of voltage range more than driving circuit, N-MOS pipes shutdown,
It is powered by the output terminal of the voltage limiting circuit for late-class circuit.
2. a kind of start-up circuit of low conduction voltage drop according to claim 1, it is characterised in that：The voltage limitation electricity
Road is that input voltage vin is converted to the voltage clamp circuit of stable output voltage range or turns input voltage vin
It is changed to the regulator circuit of fixed output voltage values.
3. a kind of start-up circuit of ultra-wide input voltage according to claim 2, it is characterised in that：The voltage clamping
Circuit includes the first chip, the input terminal connection input voltage vin of first chip, the ground connection termination of first chip
Ground, the source electrode of the output terminal connection N-MOS pipes of first chip.
4. a kind of start-up circuit of low conduction voltage drop according to claim 2, it is characterised in that：The regulator circuit packet
Include second resistance, 3rd resistor, the first NPN triode, the first capacitance and the second zener diode；The second resistance connection
Between the collector of input voltage vin and the first NPN triode, the 3rd resistor is connected to input voltage vin and
Between the base stage of one NPN triode；The moon of the second zener diode described in the base stage connection of first NPN triode
Pole, the output terminal VDD of the emitter connection driving circuit of the first NPN triode；The anode of second zener diode connects
Ground connection；First capacitance connection is between the output terminal VDD and ground of driving circuit.
5. a kind of start-up circuit of ultra-wide input voltage according to claim 4, it is characterised in that：The driving circuit
Including first resistor and the first zener diode, one end of the first resistor is connected to input voltage vin, first resistor
The other end is connected with the cathode of first zener diode, and tie point exports control as the output terminal of driving circuit
Voltage Vg, the anode of the first zener diode and ground connection.
6. a kind of start-up circuit of low conduction voltage drop according to claim 5, it is characterised in that：First voltage stabilizing, two pole
The voltage stabilizing value of pipe is less than the voltage stabilizing value of the second zener diode.
7. a kind of start-up circuit of low conduction voltage drop according to claim 6, it is characterised in that：The driving circuit is sentenced
The minimum value of disconnected voltage range is the voltage stabilizing value of the first zener diode, and the driving circuit judges the maximum value of voltage range
The sum of threshold voltage of voltage stabilizing value and N-MOS pipes for the first zener diode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161361.2A CN108173426A (en) | 2018-02-26 | 2018-02-26 | A kind of start-up circuit of low conduction voltage drop |
| PCT/CN2018/125387 WO2019161711A1 (en) | 2018-02-26 | 2018-12-29 | Starting circuit with low conduction voltage drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161361.2A CN108173426A (en) | 2018-02-26 | 2018-02-26 | A kind of start-up circuit of low conduction voltage drop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108173426A true CN108173426A (en) | 2018-06-15 |
Family
ID=62511594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810161361.2A Pending CN108173426A (en) | 2018-02-26 | 2018-02-26 | A kind of start-up circuit of low conduction voltage drop |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108173426A (en) |
| WO (1) | WO2019161711A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019161709A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Starting circuit with ultralow input voltage |
| WO2019161710A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Startup circuit |
| WO2019161711A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Starting circuit with low conduction voltage drop |
| CN111060793A (en) * | 2019-11-13 | 2020-04-24 | 南京航空航天大学 | Online measuring circuit for conduction voltage of power tube of direct-current solid-state power controller |
| CN113131740A (en) * | 2019-12-31 | 2021-07-16 | 华润微集成电路(无锡)有限公司 | Control voltage switching circuit and corresponding booster circuit |
| CN113433996A (en) * | 2020-03-23 | 2021-09-24 | 捷拓科技股份有限公司 | Auxiliary power supply circuit with wide input voltage range |
| US11545885B2 (en) | 2020-03-19 | 2023-01-03 | Minmax Technology Co., Ltd. | Auxiliary power supply circuit operating within a wide input voltage range |
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| CN103532584A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Voltage-stabilizing circuit applied to frequency modulation interphone |
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| JPH09238466A (en) * | 1996-02-29 | 1997-09-09 | Toshiba Lighting & Technol Corp | Power supply equipment, discharge lamp lighting equipment, and luminaire |
| CN103414331B (en) * | 2013-08-22 | 2015-07-08 | 矽力杰半导体技术(杭州)有限公司 | Soft starting circuit |
| CN106452040B (en) * | 2016-10-20 | 2019-07-19 | 广州金升阳科技有限公司 | Start-up circuit |
| CN108233693A (en) * | 2018-02-26 | 2018-06-29 | 广州金升阳科技有限公司 | A kind of start-up circuit of ultralow input voltage |
| CN108173425A (en) * | 2018-02-26 | 2018-06-15 | 广州金升阳科技有限公司 | A kind of start-up circuit |
| CN108173426A (en) * | 2018-02-26 | 2018-06-15 | 广州金升阳科技有限公司 | A kind of start-up circuit of low conduction voltage drop |
| CN207926436U (en) * | 2018-02-26 | 2018-09-28 | 广州金升阳科技有限公司 | A kind of start-up circuit of ultralow input voltage |
| CN207819757U (en) * | 2018-02-26 | 2018-09-04 | 广州金升阳科技有限公司 | A kind of start-up circuit |
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2018
- 2018-02-26 CN CN201810161361.2A patent/CN108173426A/en active Pending
- 2018-12-29 WO PCT/CN2018/125387 patent/WO2019161711A1/en active Application Filing
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| CN103532584A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Voltage-stabilizing circuit applied to frequency modulation interphone |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019161709A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Starting circuit with ultralow input voltage |
| WO2019161710A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Startup circuit |
| WO2019161711A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Starting circuit with low conduction voltage drop |
| CN111060793A (en) * | 2019-11-13 | 2020-04-24 | 南京航空航天大学 | Online measuring circuit for conduction voltage of power tube of direct-current solid-state power controller |
| CN113131740A (en) * | 2019-12-31 | 2021-07-16 | 华润微集成电路(无锡)有限公司 | Control voltage switching circuit and corresponding booster circuit |
| US11545885B2 (en) | 2020-03-19 | 2023-01-03 | Minmax Technology Co., Ltd. | Auxiliary power supply circuit operating within a wide input voltage range |
| CN113433996A (en) * | 2020-03-23 | 2021-09-24 | 捷拓科技股份有限公司 | Auxiliary power supply circuit with wide input voltage range |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019161711A1 (en) | 2019-08-29 |
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Application publication date: 20180615 |