CN105391292A - Low-voltage startup circuit - Google Patents
Low-voltage startup circuit Download PDFInfo
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- CN105391292A CN105391292A CN201510794743.5A CN201510794743A CN105391292A CN 105391292 A CN105391292 A CN 105391292A CN 201510794743 A CN201510794743 A CN 201510794743A CN 105391292 A CN105391292 A CN 105391292A
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- voltage
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- low
- starting circuit
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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
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Abstract
A low-voltage startup circuit of the invention comprises a first resistor, a first triode, a second triode, a fourth resistor, and a first voltage regulator tube. The output voltage of the startup circuit is controlled by the first voltage regulator tube. The output voltage of the low-voltage startup circuit of the invention is controlled through cooperation of the first resistor, the first triode, the second triode, the fourth resistor and the first voltage regulator tube. By adopting the technical scheme of the invention, low-voltage startup when the range of input voltage of an isolating switch power circuit is widened is realized effectively.
Description
Technical field
The present invention relates to low-voltage starting circuit technical field, particularly relate to a kind of low-voltage starting circuit.
Background technology
Isolating switch, namely disconnecting link is when dividing position, has the insulation distance of the requirement that conforms with the regulations and significantly disconnect mark between contact; Disconnecting link, when co-bit is put, can carry the switchgear of electric current under normal loop condition and the electric current at the appointed time under exceptional condition (such as short circuit).Motor is provided with, to drive the folding of disconnecting link in isolating switch.Motor needs by start-up circuit for it provides starting current, to make motor entry into service when starting.
Only starting resistance is provided with in simple start-up circuit.Starting resistance be connected to isolating switch power circuit input end to power supply control chip energization pins between, when starting, circuit input end voltage rises to steady state voltage (as 24V) from 0, and the supply power voltage needed for power supply control chip, also be rise to certain voltage by 0V after just can start working, such as 6V.Rise in the process of 6V at the supply power voltage of power supply control chip by 0V, need the electric capacity of an electric current to control IC energization pins to charge, and this charging current just comes from the electric current being flowed through starting resistance by isolating switch power circuit input end.
But when the input voltage range of isolating switch power circuit broadens, the start-up circuit being only provided with starting resistance cannot make isolating switch power circuit cannot take into account low voltage starting startup.
Summary of the invention
The invention provides a kind of low-voltage starting circuit, to overcome in prior art when the input voltage range of isolating switch power circuit broadens and need low voltage starting, the start-up circuit being only provided with starting resistance cannot make isolating switch power circuit cannot take into account the technical problem of low voltage starting.
The invention provides a kind of low-voltage starting circuit, comprise the first resistance, the first triode, the second triode and the 4th resistance and the first voltage-stabiliser tube;
Wherein, the first end of described first resistance is as input, second end of described first resistance is connected with the base stage of described first triode and the collector electrode of described second triode respectively, described input is also connected with the collector electrode of described first triode, the emitter of described first triode is connected with the first end of described 4th resistance and the base stage of described second triode respectively, the emitter of described second triode is connected with the second end of described 4th resistance, second end of described 4th resistance, as output, connects the energization pins of described power supply control chip; The base stage of described first triode also connects the negative pole of described first voltage-stabiliser tube, described first voltage-stabiliser tube plus earth.
Further alternatively, described low-voltage starting circuit also comprises:
Second resistance, the first end of described second resistance connects described input, and the second end connects the collector electrode of described first triode.
Further alternatively, described low-voltage starting circuit also comprises:
3rd resistance, the first end of described 3rd resistance connects the second end of described first resistance, and the second end of described 3rd resistance connects the base stage of described first triode.
Further alternatively, described low-voltage starting circuit also comprises:
Second voltage-stabiliser tube, the plus earth of described second voltage-stabiliser tube, negative pole connects the second end of described 4th resistance.
Further alternatively, described low-voltage starting circuit also comprises:
Electric capacity, the first end ground connection of described electric capacity, the second end of described electric capacity connects the second end of described 4th resistance.
Further alternatively, the output of described low-voltage starting circuit is connected with the energization pins of power supply control chip.
Further alternatively, the energization pins of described power supply control chip is also connected with the output of transformer, and it is that described power supply control chip is powered when described start-up circuit is in stable state that described transformer is used for.
Further alternatively, be provided with diode between described power supply control chip and described transformer, the positive pole of described diode connects the output of described transformer, and the negative pole of described diode connects the energization pins of described power supply control chip.
Low-voltage starting circuit of the present invention, comprise the first resistance, the first triode, the second triode and the 4th resistance and the first voltage-stabiliser tube, controlled the output voltage of start-up circuit by the first voltage-stabiliser tube, being matched with the first voltage-stabiliser tube by the first resistance, the first triode, the second triode and the 4th resistance controls the output voltage of low-voltage starting circuit of the present invention.Technical scheme of the present invention is adopted effectively to achieve low voltage starting when the input voltage range of isolating switch power circuit broadens.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of the embodiment one of low-voltage starting circuit of the present invention;
Fig. 2 is the circuit diagram of the embodiment two of low-voltage starting circuit of the present invention;
Fig. 3 is the circuit diagram of the embodiment three of low-voltage starting circuit of the present invention;
Fig. 4 is the circuit diagram of the embodiment three of low-voltage starting circuit of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In general, an isolating switch power circuit is only applicable to certain input voltage range, can normally work in this voltage range.If the border low voltage value of this scope differs several times with border high-voltage value, then low voltage starting cannot be taken into account by the scheme of starting resistance, or required cost is larger.Reason is if desired to take into account low voltage starting, then need the supply current demand that also can meet power supply control chip when border low voltage value, so starting resistance value can not be too large; Starting resistance value can not then can cause circuit working when border high-voltage value too greatly, the pressure drop of starting resistance two ends is large, the electric current flowing through starting resistance is large, thus can cause the problems such as starting resistance generates heat seriously, circuit power consumption is large, power supply control chip supply power voltage is higher.The present invention is directed to starting resistance in isolating switch power circuit and cannot take into account the technical problem of the low voltage starting of isolating switch power circuit, propose a kind of low-voltage starting circuit, the low voltage starting of isolating switch power circuit can be taken into account.Specific embodiment is as follows:
Fig. 1 is the circuit diagram of the embodiment one of low-voltage starting circuit low-voltage starting circuit of the present invention, and as shown in Figure 1, the low-voltage starting circuit of the present embodiment, specifically can comprise the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1;
Wherein, described first resistance R
1first end as input, described first resistance R
1the second end respectively with described first triode Q
1base stage and described second triode Q
2collector electrode connect, described input also with described first triode Q
1collector electrode connect, described first triode Q
1emitter respectively with described 4th resistance R
4first end and described second triode Q
2base stage connect, described second triode Q
2emitter and described 4th resistance R
4second end connect, described 4th resistance R
4the second end as output, connect the energization pins of described power supply control chip; Described first triode Q
1base stage also connect described first voltage-stabiliser tube DZ
1negative pole, described first voltage-stabiliser tube DZ
1plus earth.
In the specific implementation, the first resistance R
1span be 1 ~ 100k Ω, concrete magnitude of voltage can be determined by technical staff according to actual conditions.The effect of the first resistance R1 is at normal work timing system first voltage-stabiliser tube DZ
1breakdown current.Further alternatively, the first resistance R of the present embodiment
1the input power that connects of first end can be inverse-excitation type DC power supply (DC/DC).
In the specific implementation, the first voltage-stabiliser tube DZ
1for controlling the output voltage of start-up circuit.It should be noted that, select to have the voltage-stabiliser tube of suitable breakdown voltage value, such as, supply power voltage (the namely output voltage V of start-up circuit that puncture voltage VBR equals needed for power supply control chip can be selected
out) voltage-stabiliser tube.
In the specific implementation, the first situation is: when the voltage of input is less, when needing to realize low voltage starting.Particularly, as input voltage V
inbe less than the first voltage-stabiliser tube DZ
1puncture voltage VBR
1time, those skilled in the art should know the first triode Q
1base current very little, as the first resistance R
1resistance very little time, the first resistance R
1on voltage very little, negligible, therefore the first triode Q
1base voltage approximate input voltage; Now, the first triode Q
1for saturation condition, the first triode Q
1base emitter voltage difference is about 0.7V.4th resistance R
4two ends be connected across the second triode Q
2base stage and emitter-base bandgap grading between, its both end voltage can not more than 0.7V.Then can obtain start-up circuit output voltage V
outabout (V
in-1.4) V is to (V
in-0.7), between V, the supply power voltage provided for power supply control chip (not shown) can not more than V
in, and V
inbe less than VBR
1, think that the supply power voltage that power supply control chip (not shown) provides can not more than VBR
1, achieve the low voltage starting of the low-voltage starting circuit of the present embodiment.
The second situation, when the voltage of input is comparatively large, when not needing low voltage starting.As input voltage V
inbe greater than the first voltage-stabiliser tube DZ
1puncture voltage VBR
1time, the first triode Q
1base voltage approximate the first voltage-stabiliser tube DZ
1puncture voltage VBR
1.According to the characteristic of voltage-stabiliser tube, with the first voltage-stabiliser tube DZ
1the circuit both end voltage be in parallel is the puncture voltage VBR of voltage-stabiliser tube
1.Known first triode Q
1base voltage is VBR
1, from the first situation, the first triode Q
1base emitter voltage is about 0.7V, the 4th resistance R
4both end voltage can not more than 0.7V; Therefore start-up circuit output voltage V
outabout (VBR
1-1.4) V is to (VBR
1-0.7), between V, the supply power voltage provided for power supply control chip can not more than VBR
1, achieve the low voltage starting of the low-voltage starting circuit of the present embodiment.
Further, the low-voltage starting circuit of the present embodiment also has safety precaution mechanism, and namely the third situation, works as V
outwhen shorted to earth.Such as, when power supply control chip lost efficacy and caused output shorted to earth, the 4th resistance R
4on electric current increase, one part of current can through the second triode Q
2base emitter-base bandgap grading; Now, the second triode Q
2enter magnifying state, as long as electric current does not reach enough large, then engineering is thought the 4th resistance R
4on voltage can not more than 0.7V; Meanwhile, due to the second triode Q
2to the first triode Q
1base current shunt, the first triode Q
1enter magnifying state, the first triode Q
1collector current reduce, thus the electric current of emitter also reduces, the 4th resistance R
4on voltage constant be 0.7V, the low-voltage starting circuit of the present embodiment enters constant current operation state, and the constant current of output is 0.7V/R4, thus can effectively prevent electric current excessive and cause low-voltage starting circuit thermal runaway, input overload equivalent risk.
The low-voltage starting circuit of the present embodiment, low-voltage starting circuit of the present invention, comprise the first resistance, the first triode, the second triode and the 4th resistance and the first voltage-stabiliser tube, controlled the output voltage of start-up circuit by the first voltage-stabiliser tube, being matched with the first voltage-stabiliser tube by the first resistance, the first triode, the second triode and the 4th resistance controls the output voltage of low-voltage starting circuit of the present invention.Technical scheme of the present invention is adopted effectively to achieve low voltage starting when the input voltage range of isolating switch power circuit broadens.
In addition, when the present embodiment input voltage is higher, start-up circuit quiescent dissipation also can not be excessive.
The low-voltage starting circuit of the present embodiment, comprises the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1, by the first voltage-stabiliser tube DZ
1control the output voltage of start-up circuit, by the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1match and control the output voltage of low-voltage starting circuit of the present invention.Technical scheme of the present invention is adopted effectively to achieve low voltage starting when the input voltage range of isolating switch power circuit broadens.
Fig. 2 is the circuit diagram of the embodiment two of low-voltage starting circuit of the present invention, and the low-voltage starting circuit of the present embodiment, on the basis of above-described embodiment one, introduces technical scheme of the present invention further in further detail.As shown in Figure 2, the low-voltage starting circuit of the present embodiment specifically can comprise the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1;
Wherein, the first resistance R
1first end as input, the first resistance R
1the second end connect the first triode Q
1base stage, also connect the second triode Q
2collector electrode, input also connects the first triode Q
1collector electrode, the first triode Q
1emitter connect the 4th resistance R
4first end, also connect the second triode Q
2base stage, the second triode Q
2emitter connect the 4th resistance R
4the second end, the 4th resistance R
4the second end as output, connect power supply control chip (not shown in Fig. 2) energization pins, described first triode Q
1base stage also connect described first voltage-stabiliser tube DZ
1negative pole, the first voltage-stabiliser tube DZ
1plus earth.
Further alternatively, the low-voltage starting circuit of the present embodiment also comprises the second resistance R
2with the 3rd resistance R
3.
Second resistance R
2first end connect input, the second end connects the first triode Q
1collector electrode;
3rd resistance R
3first end connect the first resistance R
1the second end, the 3rd resistance R
3the second end connect the first triode Q
1base stage.
In the specific implementation, the 3rd resistance R
3be 1 ~ 100k Ω, concrete magnitude of voltage can be determined by technical staff according to actual conditions.
In the low-voltage starting circuit of the present embodiment, work as V
outhigher than DZ
1puncture voltage VBR
1time can form larger anti-filling electric current, the second resistance R is set
2with the 3rd resistance R
3can prevent anti-electric current of filling with from causing circuit to damage, therefore improve the reliability of circuit.
Further alternatively, as shown in Figure 2, the low-voltage starting circuit of the present embodiment also comprises the second voltage-stabiliser tube DZ
2, the second voltage-stabiliser tube DZ
2plus earth, negative pole connect the 4th resistance R
4the second end.In the specific implementation, due to abnormal conditions, such as input voltage is unstable, may produce abnormal due to voltage spikes, therefore, arrange the second voltage-stabiliser tube DZ
2can voltage go out abnormal in suppress abnormal voltage spike, thus improve the reliability of the low-voltage starting circuit of the present embodiment.Certain the present embodiment is not limited to arrange voltage-stabiliser tube, can also arrange other and can realize other voltage stabilizing circuits of the object of the invention.
Further alternatively, low-voltage starting circuit also comprises electric capacity C, the first end ground connection of electric capacity C, and the second end connects output V
out.It will be recognized by those skilled in the art that and can not reach ideal situation, output voltage in actual applications, the supply power voltage of power supply control chip in other words, be not stable voltage, therefore need to arrange storage capacitor, for power supply control chip provides stable voltage source.
The low-voltage starting circuit of the present embodiment, except comprising the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1, by the first voltage-stabiliser tube DZ
1control the output voltage of start-up circuit, by the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1match and control the output voltage of low-voltage starting circuit of the present invention.The low-voltage starting circuit of the present embodiment, also comprises the second resistance R
2with the 3rd resistance R
3, prevent anti-electric current of filling with from causing circuit to damage, therefore improve the reliability of circuit.
Fig. 3 is the circuit diagram of the embodiment three of low-voltage starting circuit of the present invention, and the low-voltage starting circuit of the present embodiment, on the basis of above-described embodiment two, introduces technical scheme of the present invention further in further detail.As shown in Figure 3, the low-voltage starting circuit of the present embodiment specifically can comprise the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1;
Wherein, the first resistance R
1first end as input, the first resistance R
1the second end connect the first triode Q
1base stage, also connect the second triode Q
2collector electrode, input also connects the first triode Q
1collector electrode, the first triode Q
1emitter connect the 4th resistance R
4first end, also connect the second triode Q
2base stage, the second triode Q
2emitter connect the 4th resistance R
4the second end, the 4th resistance R
4the second end as output, connect power supply control chip (not shown in Fig. 2) energization pins, described first triode Q
1base stage also connect described first voltage-stabiliser tube DZ
1negative pole, described first voltage-stabiliser tube DZ
1plus earth.
Further alternatively, the low-voltage starting circuit of the present embodiment also comprises the second resistance R
2with the 3rd resistance R
3.
Second resistance R
2first end connect input, the second end connects the first triode Q
1collector electrode;
3rd resistance R
3first end connect the first resistance R
1the second end, the 3rd resistance R
3the second end connect the first triode Q
1base stage.
In the specific implementation, the 3rd resistance R
3be 1 ~ 100k Ω, concrete magnitude of voltage can be determined by technical staff according to actual conditions.
In the low-voltage starting circuit of the present embodiment, work as V
outhigher than DZ
1puncture voltage VBR
1time can form larger anti-filling electric current, the second resistance R is set
2with the 3rd resistance R
3can prevent anti-electric current of filling with from causing circuit to damage, therefore improve the reliability of circuit.
Further alternatively, low-voltage starting circuit also comprises the second voltage-stabiliser tube DZ
2, the second voltage-stabiliser tube DZ
2plus earth, negative pole connect the 4th resistance R
4the second end.In the specific implementation, due to abnormal conditions, such as input voltage is unstable, may produce abnormal due to voltage spikes, therefore, arrange the second voltage-stabiliser tube DZ
2can voltage go out abnormal in suppress abnormal voltage spike, thus improve the reliability of the low-voltage starting circuit of the present embodiment.Certain the present embodiment is not limited to arrange voltage-stabiliser tube, can also arrange other and can realize other voltage stabilizing circuits of the object of the invention.
Further alternatively, low-voltage starting circuit also comprises electric capacity C, the first end ground connection of electric capacity C, and the second end connects output V
out.It will be recognized by those skilled in the art that and can not reach ideal situation, output voltage in actual applications, the supply power voltage of power supply control chip in other words, be not stable voltage, therefore need to arrange storage capacitor, for power supply control chip provides stable voltage source.
During concrete enforcement, the output of the low-voltage starting circuit of the present embodiment is connected with the energization pins of power supply control chip IC.
Further alternatively, as shown in Figure 3, the energization pins of power supply control chip IC is also connected with the output of transformer T, and it is that power supply control chip IC powers when described start-up circuit is in stable state that transformer T is used for.
In the specific implementation, when power supply control chip IC is when just starting to start, be that power supply control chip IC powers by the low-voltage starting circuit of the present embodiment, when startup is complete, when power supply control chip IC enters normal operating conditions, by transformer T, power supply control chip IC is powered.
Further alternatively, be provided with diode D between power supply control chip IC and transformer T, the output of the positive pole connection transformer T of diode D, the negative pole of diode D connects the energization pins of power supply control chip IC.Diode D in the present embodiment has rectified action, and the electric current exported by transformer T is alternating current, flows through after diode rectification becomes direct current, flows into power supply control chip.
In the specific implementation, when low-voltage starting circuit carries out stable state, by transformer T, power supply control chip IC is powered, the first voltage-stabiliser tube DZ at this moment in low-voltage starting circuit
1puncture voltage VBR
1for output voltage V
out, therefore, the first triode Q
1base voltage approximate V
out, start-up circuit enters low power consumpting state, no longer provides operating current to power supply control chip.
The present embodiment, on the basis of the circuit shown in Fig. 3, further defines the model of power supply control chip IC.
In the specific implementation, as shown in Figure 4, power supply control chip IC take model as the power supply control chip of UCC28C41 is example, and on the basis of the circuit shown in Fig. 3, power supply control chip UCC28C41 is by control switch pipe Q
3connection transformer T.The output pin connection control switching tube Q of power supply control chip UCC28C41
3grid, control switch pipe Q
3source ground, drain electrode connection transformer T.Control switch pipe Q in the present embodiment
3effect be driving transformer T.
The low-voltage starting circuit of the present embodiment, comprises the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1, by the first voltage-stabiliser tube DZ
1control the output voltage of start-up circuit, by the first resistance R
1, the first triode Q
1, the second triode Q
2with the 4th resistance R
4with the first voltage-stabiliser tube DZ
1match and control the output voltage of low-voltage starting circuit of the present invention.Technical scheme of the present invention is adopted effectively to achieve low voltage starting when the input voltage range of circuit broadens.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a low-voltage starting circuit, is characterized in that, comprises the first resistance, the first triode, the second triode, the 4th resistance and the first voltage-stabiliser tube;
Wherein, the first end of described first resistance is as input, second end of described first resistance is connected with the base stage of described first triode and the collector electrode of described second triode respectively, described input is also connected with the collector electrode of described first triode, the emitter of described first triode is connected with the first end of described 4th resistance and the base stage of described second triode respectively, the emitter of described second triode is connected with the second end of described 4th resistance, second end of described 4th resistance, as output, connects the energization pins of described power supply control chip; The base stage of described first triode also connects the negative pole of described first voltage-stabiliser tube, described first voltage-stabiliser tube plus earth.
2. low-voltage starting circuit according to claim 1, is characterized in that, described low-voltage starting circuit also comprises the second resistance, and the first end of described second resistance connects described input, and the second end of described second resistance connects the collector electrode of described first triode.
3. low-voltage starting circuit according to claim 1 is characterized in that, described low-voltage starting circuit also comprises the 3rd resistance, the first end of described 3rd resistance connects the second end of described first resistance, and the second end of described 3rd resistance connects the base stage of described first triode.
4. according to the arbitrary described low-voltage starting circuit of claim 1-3, it is characterized in that, described low-voltage starting circuit also comprises the second voltage-stabiliser tube, the plus earth of described second voltage-stabiliser tube, and the negative pole of described second voltage-stabiliser tube connects the second end of described 4th resistance.
5. according to the arbitrary described low-voltage starting circuit of claim 1-3, it is characterized in that, described low-voltage starting circuit also comprises electric capacity, the first end ground connection of described electric capacity, and the second end of described electric capacity connects the second end of described 4th resistance.
6., according to the arbitrary described low-voltage starting circuit of claim 1-3, it is characterized in that, the output of described low-voltage starting circuit is connected with the energization pins of power supply control chip.
7. low-voltage starting circuit according to claim 6, is characterized in that, the energization pins of described power supply control chip is also connected with the output of transformer, and it is that described power supply control chip is powered when described start-up circuit is in stable state that described transformer is used for.
8. low-voltage starting circuit according to claim 7, it is characterized in that, diode is provided with between described power supply control chip and described transformer, the positive pole of described diode is connected with the output of described transformer, and the negative pole of described diode is connected with the energization pins of described power supply control chip.
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| CN201510794743.5A CN105391292A (en) | 2015-11-18 | 2015-11-18 | Low-voltage startup circuit |
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|---|---|---|---|
| CN201510794743.5A CN105391292A (en) | 2015-11-18 | 2015-11-18 | Low-voltage startup circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332435A (en) * | 2017-08-30 | 2017-11-07 | 合肥惠科金扬科技有限公司 | The power supply circuit and Switching Power Supply of a kind of pulse width modulation chip |
| CN108023472A (en) * | 2017-12-16 | 2018-05-11 | 无锡昌至盛机械制造有限公司 | A kind of start-up circuit of quick low-power consumption |
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| CN2162037Y (en) * | 1993-08-11 | 1994-04-13 | 秦秉仁 | Starting time delay switch |
| CN101604909A (en) * | 2009-07-17 | 2009-12-16 | 河海大学 | A kind of starting circuit for direct-current switch power supply |
| CN102355124A (en) * | 2011-09-14 | 2012-02-15 | 华为技术有限公司 | Device for avoiding frequent start stop of photovoltaic inverter and photovoltaic inverter |
| CN203747641U (en) * | 2013-12-23 | 2014-07-30 | 上海大郡动力控制技术有限公司 | Switching power supply acceleration and consumption reduction starting circuit |
| CN104753329A (en) * | 2015-03-24 | 2015-07-01 | 华南理工大学 | High-power switch power source soft starting circuit |
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| CN107332435A (en) * | 2017-08-30 | 2017-11-07 | 合肥惠科金扬科技有限公司 | The power supply circuit and Switching Power Supply of a kind of pulse width modulation chip |
| CN107332435B (en) * | 2017-08-30 | 2023-10-20 | 合肥惠科金扬科技有限公司 | Power supply circuit of pulse width modulation chip and switching power supply |
| CN108023472A (en) * | 2017-12-16 | 2018-05-11 | 无锡昌至盛机械制造有限公司 | A kind of start-up circuit of quick low-power consumption |
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