CN107947560A - On-off circuit control circuit and on-off circuit - Google Patents
On-off circuit control circuit and on-off circuit Download PDFInfo
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- CN107947560A CN107947560A CN201711347567.6A CN201711347567A CN107947560A CN 107947560 A CN107947560 A CN 107947560A CN 201711347567 A CN201711347567 A CN 201711347567A CN 107947560 A CN107947560 A CN 107947560A
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- 238000012512 characterization method Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- 230000009194 climbing Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 3
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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
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
Abstract
The invention discloses a kind of on-off circuit control circuit and on-off circuit, on-off circuit control circuit includes compensation circuit, the compensation circuit includes output voltage decision circuitry, timing circuit, transadmittance gain adjusts circuit and spaning waveguide operational amplifier, the first input end of spaning waveguide operational amplifier receives the first voltage signal of characterization output current, second input terminal of the spaning waveguide operational amplifier receives reference voltage, one end of the output terminal connection compensating electric capacity of spaning waveguide operational amplifier, the other end ground connection of compensating electric capacity, output voltage decision circuitry and timing circuit receive the sampled signal of characterization output voltage, and it is connected respectively to the transadmittance gain and adjusts circuit, the transadmittance gain adjusts the transadmittance gain that circuit controls the spaning waveguide operational amplifier, in the charging current of the startup stage increase compensating electric capacity of on-off circuit, the voltage for accelerating compensating electric capacity rises.Climbing speed of the invention by controlling compensating electric capacity voltage when originating working status so that compensating electric capacity energy quick charge, and then complete quick start.
Description
Technical field
The present invention relates to on-off circuit field, more specifically to a kind of on-off circuit control circuit and on-off circuit.
Background technology
The functional block diagram of traditional LED drive circuit as shown in Figure 1, external communication input voltage after rectifier bridge rectification
The DC voltage VIN pulsed, then DC voltage VIN produced after on-off circuit conversion process output voltage VO supply
Load, control circuit receive the sampled signal of DC voltage VIN, output voltage VO and on-off circuit output, to produce control
Signal is to the on off state in controlling switch circuit, so that output voltage signal expected from on-off circuit output.
As shown in Fig. 2, control circuit generally comprises 5 submodules：Power supply module, sample circuit, compensation circuit, conducting are closed
Disconnected control circuit and drive circuit.Power supply module receives DC voltage VIN and output voltage VO to produce supply voltage as other
All submodule power supplies；The sampled signal of sample circuit reception on-off circuit transmission obtains sampled signal and is transferred to after treatment
Compensation circuit；Compensation circuit is compensated signal by compensation deals, and thermal compensation signal, which is transferred to open, to switch off control circuit to obtain
The control signal of on-off circuit, control signal is again through the switch in overdrive circuit final output drive signal controlling switch circuit
State is to adjust output voltage VO.In general, the input structure of power supply module is as shown in figure 3, DC voltage VIN passes through startup
Resistance R0 to capacitance C02, output voltage VO arrive capacitance C02, the both ends of capacitance C02 by current-limiting resistance R1 and sustained diode 1
Voltage VCC is supply voltage.DC voltage VIN is charged by starting resistance R0 to capacitance C02, and circuit, which provides, in order to control starts electricity
Stream, after chip is started to work, output voltage VO starts to charge to capacitance C02 by current-limiting resistance and fly-wheel diode, capacitance
The supply voltage of C02 is powered by power supply circuit for whole control circuit, keeps system normal operation.
However, in actual work, in order to filter out working frequency ripple wave, in the compensating electric capacity and on-off circuit in compensation circuit
Output capacitance choose often very big, cause after drive circuit starts output voltage VO to rise very slow, and each switch periods
ON time is very short, therefore the output voltage VO in power supply module is very weak to effective charging ability of capacitance C02, from drive circuit
Start to work to supply voltage VCC to reach and need longer time for electric equilibrium, often repeatedly restarting could complete to start
Journey, so that the startup time is very long, or even can not be completed start-up course under the occasions such as continuous switching on and shutting down.
The content of the invention
In view of this, the present invention proposes a kind of on-off circuit control circuit and on-off circuit, by controlling compensation circuit
The climbing speed of middle compensating electric capacity voltage when originating working status, can strengthen charging ability of the output voltage to charging capacitor,
So as to be rapidly completed the supply voltage demand started in normal work.
A kind of on-off circuit control circuit of the present invention, including compensation circuit, the compensation circuit are sentenced including output voltage
Deenergizing, timing circuit, transadmittance gain adjust circuit and spaning waveguide operational amplifier, and the first input end of the spaning waveguide operational amplifier receives characterization and opens
The first voltage signal of the output current on powered-down road, the second input terminal of the spaning waveguide operational amplifier receive reference voltage, the mutual conductance
One end of the output terminal connection compensating electric capacity of amplifier, the other end ground connection of the compensating electric capacity, the output voltage decision circuitry
The sampled signal of the output voltage of characterization on-off circuit is received with the timing circuit, and is adjusted respectively with the transadmittance gain
Circuit connects, and the transadmittance gain adjusts the transadmittance gain that circuit adjusts the spaning waveguide operational amplifier, in the startup stage of on-off circuit
Increase the charging current to compensating electric capacity, accelerate the rate of voltage rise of compensating electric capacity.
Optionally, the transadmittance gain of the spaning waveguide operational amplifier is on startup the first transadmittance gain, when the timing circuit meter
When reaching first time threshold value, the transadmittance gain adjust circuit adjust the spaning waveguide operational amplifier transadmittance gain be changed into second across
Gain is led, second transadmittance gain is less than first transadmittance gain.
Optionally, the transadmittance gain of the spaning waveguide operational amplifier is the first transadmittance gain on startup, when the output voltage is sentenced
When deenergizing detects that the output voltage reaches first voltage threshold value or the timing circuit timing reaches first time threshold value,
The transadmittance gain that the transadmittance gain adjusts the circuit adjusting spaning waveguide operational amplifier is changed into the second transadmittance gain, and second mutual conductance increases
Benefit is less than first transadmittance gain.
Optionally, the first input end of the spaning waveguide operational amplifier receives the output current of characterization on-off circuit through first switch
First voltage signal；
When the output voltage sampled signal is less than second voltage threshold value, the first switch disconnects, when the output
When voltage sampling signal is more than second voltage threshold value, the first switch closure.
Optionally, timing is realized by the way of to switch cycle count, when on-off times reach preset value, the mutual conductance
Gain is changed into the second transadmittance gain from the first transadmittance gain.
Optionally, the on-off times are fixed, the voltage adjusting switch pipe service time of the compensating electric capacity,
When output voltage is less than tertiary voltage threshold value, the switching tube turn-off time is fixed；
When output voltage is equal to or more than tertiary voltage threshold value, when the output voltage adjusts the switching tube shut-off
Between.
The invention also provides a kind of on-off circuit, including power stage circuit and the on-off circuit control described in any of the above item
Circuit processed,
The on-off circuit control circuit receives the voltage of rectifier bridge output and the output voltage signal of on-off circuit and defeated
Go out current signal, to produce the switch motion that switch controlling signal controls power switch pipe in the power stage circuit.
Optionally, the on-off circuit is LED drive circuit.
In conclusion according to on-off circuit control circuit of the present invention and on-off circuit, by controlling the spaning waveguide operational amplifier
Transadmittance gain causes the climbing speed of compensating electric capacity voltage when originating working status in compensation circuit to accelerate so that compensating electric capacity
Energy quick charge, so as to lengthen the ON time of power switch pipe, can strengthen charging ability of the output voltage to output capacitance, it
Afterwards, after a period of time to be launched, normal operating conditions is led into the transadmittance gain switching of spaning waveguide operational amplifier.The present invention can be mended by controlling
The charging current of capacitance is repaid, enhances charging ability of the output voltage to output capacitance so that can complete quickly to start.
Brief description of the drawings
Fig. 1 is the functional block diagram of traditional LED drive circuit；
Fig. 2 is the module map of control circuit in Fig. 1；
Fig. 3 is the input structure figure of power supply module in Fig. 2；
Fig. 4 is the compensation circuit circuit diagram of on-off circuit control circuit of the present invention；
Fig. 5 is the first control principle drawing of compensation circuit in the present invention；
Fig. 6 is second of control principle drawing of compensation circuit in the present invention；
Fig. 7 is the third control principle drawing of compensation circuit in the present invention；
Fig. 8 is the 4th kind of control principle drawing of compensation circuit in the present invention.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
Thoroughly understand to make the public have the present invention, be described in detail in present invention below preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
More specifically description is of the invention by way of example referring to the drawings in the following passage.It should be noted that attached drawing is adopted
Non-accurate ratio is used with more simplified form and, only to convenience, lucidly aid in illustrating the embodiment of the present invention
Purpose.
Below with reference to attached drawing some preferred embodiments that the present invention will be described in detail, however, the present invention is not limited thereto.
In embodiments of the present invention, the on-off circuit is by taking LED drive circuit as an example, but the control circuit application of the present invention
Not limited to this, the control circuit of the LED drive circuit is as shown in Fig. 2, power supply module, sample circuit in control circuit, lead
Logical to switch off control circuit consistent with the 26S Proteasome Structure and Function and Fig. 2 of drive circuit, details are not described herein.The difference is that due to
Start the problem of slow there are of the prior art, compensation circuit is improved in the present invention.
The circuit diagram of the compensation circuit according to the present invention is shown with reference to figure 4, the compensation circuit is sentenced including output voltage
Deenergizing, timing circuit, transadmittance gain adjust circuit and the first input end of spaning waveguide operational amplifier OTA, the spaning waveguide operational amplifier OTA receive
The second input terminal for sampling first voltage the signal Vi, the spaning waveguide operational amplifier OTA of obtained characterization output current is received with reference to electricity
Press Vref, one end of the output terminal connection compensating electric capacity C1 of the spaning waveguide operational amplifier OTA, another termination of the compensating electric capacity C1
Ground, the output voltage decision circuitry and the timing circuit receive the sampled signal V of characterization output voltageFB, and connect respectively
It is connected to the transadmittance gain and adjusts circuit, the transadmittance gain adjusts the transadmittance gain gm that circuit controls the spaning waveguide operational amplifier,
The charging current of the startup stage increase compensating electric capacity of on-off circuit, the voltage for accelerating compensating electric capacity rise.
When exporting not charged, the control principle drawing of the compensation circuit is as shown in figure 5, the mutual conductance of the spaning waveguide operational amplifier
Gain gm is the first transadmittance gain gm1 on startup, when the timing circuit timing reaches first time threshold value t1, it is described across
Gain adjusting circuit is led to control so that the transadmittance gain of the spaning waveguide operational amplifier becomes gm as the second transadmittance gain gm2, described second across
Lead gain gm2 and be less than the first transadmittance gain gm1.The transadmittance gain of startup stage is bigger so that the output of spaning waveguide operational amplifier
Electric current is larger, and then accelerates the rising of compensating electric capacity voltage.As shown in Figure 5, it can be seen that the voltage Vc1 of compensating electric capacity C1 is in t1
Rate of change before is bigger, and the change after t1 is smaller, illustrates that startup stage can be completed to the fast of compensating electric capacity C1
Speed charging.
As shown in fig. 6, the transadmittance gain gm of the spaning waveguide operational amplifier is on startup the first transadmittance gain gm1, when described defeated
Go out voltage decision circuitry and make output voltage VFBReach first voltage threshold value VFB1Judgement, the transadmittance gain adjusts circuit control
System is so that the transadmittance gain of the spaning waveguide operational amplifier becomes gm and is less than described into the second transadmittance gain gm2, the second transadmittance gain gm2
First transadmittance gain gm1.The transadmittance gain of startup stage is bigger so that the output current of spaning waveguide operational amplifier is larger, and then accelerates
The rising of compensating electric capacity voltage.As shown in Figure 6, it can be seen that the voltage Vc1 of compensating electric capacity C1 is in VFB1Rate of change ratio before
It is larger, VFB1Change afterwards is smaller, illustrates that startup stage can complete the quick charge to compensating electric capacity C1.
When exporting powered, the V in t1 and Fig. 6 in Fig. 5 is mainly seenFB1Who first reaches, just according to above-mentioned Fig. 5 or Fig. 6
In process be controlled.
On the basis of such scheme, in order to further speed up startup speed, first is added to open in the first input end of mutual conductance
Close S1, i.e., the first input end of described spaning waveguide operational amplifier OTA receives the of the output current that characterizes on-off circuit through first switch S1
One voltage signal.
When exporting powered, as shown in fig. 7, working as the output voltage sampled signal VFBLess than second voltage threshold value VFB2When,
The first switch S1 is disconnected, as the output voltage sampled signal VFBMore than second voltage threshold value VFB2When, the first switch
S2 is closed.The transadmittance gain gm of the spaning waveguide operational amplifier is the first transadmittance gain gm1 on startup, when the timing circuit timing reaches
During to first time threshold value t1, the transadmittance gain adjusts circuit and control so that the transadmittance gain change gm of the spaning waveguide operational amplifier is the
Two transadmittance gain gm2, the second transadmittance gain gm2 are less than the first transadmittance gain gm1.
In VFBLess than VFB2When, the output current of the spaning waveguide operational amplifier is gm1*Vref
In VFBMore than VFB2And t, when being less than t1, the output current of the spaning waveguide operational amplifier is gm1* (Vref-Vi)
When t is more than t1, the output current of the spaning waveguide operational amplifier is gm2* (Vref-Vi)
The output of spaning waveguide operational amplifier is charged directly to compensating electric capacity, due to
Gm1*Vref ＞ gm1* (Vref-Vi) ＞ gm2* (Vref-Vi)
Therefore voltage change in the charging process of compensating electric capacity is as shown in fig. 7, the transadmittance gain in startup stage is bigger,
So that the output current of spaning waveguide operational amplifier is larger, and then accelerate the rising of compensating electric capacity voltage.And most starting directly to compensation electricity
Hold the electricity for rushing a period of time so that start faster.As shown in Figure 7, it can be seen that compensating electric capacity C1 is in VFB2Voltage Vc1 before
Quickly, rate of changes of the Vc1 before t1 is bigger afterwards, and the change after t1 is smaller for change, illustrates that startup stage can be with
Complete the quick charge to compensating electric capacity C1.
As shown in figure 8, work as the output voltage sampled signal VFBLess than second voltage threshold value VFB2When, the first switch
S1 is disconnected, as the output voltage sampled signal VFBMore than second voltage threshold value VFB2When, the first switch S2 closures.It is described
The transadmittance gain gm of spaning waveguide operational amplifier is the first transadmittance gain gm1 on startup, when the output voltage decision circuitry makes output
Voltage VFBReach first voltage threshold value VFB1Judgement when, the transadmittance gain adjusts circuit and controls so that the spaning waveguide operational amplifier
Transadmittance gain becomes gm and is less than the first transadmittance gain gm1 into the second transadmittance gain gm2, the second transadmittance gain gm2.
In VFBLess than VFB2When, the output current of the spaning waveguide operational amplifier is gm1*Vref
In VFBMore than VFB2And VFBLess than VFB1When, the output current of the spaning waveguide operational amplifier is gm1* (Vref-Vi)
Work as VFBMore than VFB1When, the output current of the spaning waveguide operational amplifier is gm2* (Vref-Vi)
The output of spaning waveguide operational amplifier is charged directly to compensating electric capacity, due to
Gm1*Vref ＞ gm1* (Vref-Vi) ＞ gm2* (Vref-Vi)
Therefore the voltage change in the charging process of compensating electric capacity in the transadmittance gain in startup stage as shown in fig. 7, compare
Greatly so that the output current of spaning waveguide operational amplifier is larger, and then accelerates the rising of compensating electric capacity voltage.And most starting directly to compensation
Capacitance rushes the electricity of a period of time so that starts faster.As shown in Figure 7, it can be seen that compensating electric capacity C1 is in VFB2Voltage before
Vc1 changes quickly, and Vc1 is in V afterwardsFB1Rate of change before is bigger, VFB1Change afterwards is smaller, illustrates startup stage
It can complete the quick charge to compensating electric capacity C1.
When exporting powered, the V in t1 and Fig. 8 in Fig. 7 is mainly seenFB1Who first reaches, just according to above-mentioned Fig. 7 or Fig. 8
In process be controlled.
Using to switch cycle count by the way of realize timing, when on-off times reach preset value, the transadmittance gain from
First transadmittance gain is changed into the second transadmittance gain.
In the present invention on-off times can be caused to fix, the first time threshold value is determined by switch periods.
The on-off times are fixed, the voltage adjusting switch pipe service time of the compensating electric capacity,
The timing circuit receives the sampled signal V of characterization output voltageFB,
As the sampled signal V of characterization output voltageFBLess than tertiary voltage threshold value VFB3When, the switching tube turn-off time is equal to most
The big turn-off time；
As the sampled signal V of characterization output voltageFBEqual to or more than tertiary voltage threshold value VFB3When, the output voltage
The switching tube turn-off time is adjusted, when output voltage is bigger, the turn-off time of switching tube is smaller.
The sampled signal V of the output voltageFBPossible initial value is to be less than, equal to and more than tertiary voltage threshold value VFB3, most
It is more than tertiary voltage threshold value V under normal circumstances eventuallyFB3。
Therefore first time threshold value t1 is equal to the sum of all switch periods in switch counts.
Fixed in the present embodiment using the number of switch counts or the direct set time.
It should be noted that first time threshold value t1, first voltage threshold value V hereFB1, second voltage threshold value VFB2All it is
Can voluntarily it be set according to actual conditions, it is considered that reach V at t1 moment or output voltageFB1After start and completed.
The first transadmittance gain gm1 and the second transadmittance gain gm2 can set different values according to actual conditions.Described
One voltage threshold VFB1With the tertiary voltage threshold value VFB3There is no any direct relation.Second voltage threshold value VFB2Less than the first electricity
Press threshold value VFB1。
Above by taking on-off circuit is LED drive circuit as an example, but the control circuit of on-off circuit of the present invention can also be applied
In the suitable on-off circuit such as AC-DC voltage conversion circuit, DC-DC voltage conversion circuit.Although the present invention's
Embodiment inputs for exchange, but the scheme of the present invention is equally applicable to direct current input, and teaching according to the present invention, this point can
Known by those of ordinary skill in the art.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
Refer to another embodiment on the books.
Embodiments described above, does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (8)
1. a kind of on-off circuit control circuit, including compensation circuit, it is characterised in that：
The compensation circuit includes output voltage decision circuitry, timing circuit, transadmittance gain and adjusts circuit and spaning waveguide operational amplifier, described
The first input end of spaning waveguide operational amplifier receives the first voltage signal of the output current of characterization on-off circuit, and the of the spaning waveguide operational amplifier
Two input terminals receive reference voltage, the spaning waveguide operational amplifier output terminal connection compensating electric capacity one end, the compensating electric capacity it is another
One end ground connection, the output voltage decision circuitry and the timing circuit receive the sampling of the output voltage of characterization on-off circuit
Signal, and adjust circuit with the transadmittance gain respectively and be connected, the transadmittance gain adjusts circuit and adjusts the spaning waveguide operational amplifier
Transadmittance gain, increases the charging current to compensating electric capacity, the voltage for accelerating compensating electric capacity rises in the startup stage of on-off circuit.
2. on-off circuit control circuit according to claim 1, it is characterised in that：
The transadmittance gain of the spaning waveguide operational amplifier is the first transadmittance gain on startup, when the timing circuit timing reaches first
Between threshold value when, the transadmittance gain, which adjusts circuit and adjusts the transadmittance gain of the spaning waveguide operational amplifier, is changed into the second transadmittance gain, described
Second transadmittance gain is less than first transadmittance gain.
3. on-off circuit control circuit according to claim 1, it is characterised in that：
The transadmittance gain of the spaning waveguide operational amplifier is the first transadmittance gain on startup, when the output voltage decision circuitry detects
The output voltage reaches first voltage threshold value or when the timing circuit timing reaches first time threshold value, the transadmittance gain
Adjust circuit and adjust the transadmittance gain of the spaning waveguide operational amplifier and be changed into the second transadmittance gain, second transadmittance gain is less than described the
One transadmittance gain.
4. the on-off circuit control circuit according to Claims 2 or 3, it is characterised in that：The first of the spaning waveguide operational amplifier is defeated
Enter the first voltage signal that end receives the output current of characterization on-off circuit through first switch；
When the output voltage sampled signal is less than second voltage threshold value, the first switch disconnects, when the output voltage
When sampled signal is more than second voltage threshold value, the first switch closure.
5. according to the on-off circuit control circuit described in claim 2-4 any one, it is characterised in that：Using to switch periods
The mode of counting realizes timing, when on-off times reach preset value, the transadmittance gain from the first transadmittance gain be changed into second across
Lead gain.
6. on-off circuit control circuit according to claim 5, it is characterised in that：The on-off times are fixed, the benefit
The voltage adjusting switch pipe service time of capacitance is repaid,
When output voltage is less than tertiary voltage threshold value, the switching tube turn-off time is fixed；
When output voltage is equal to or more than tertiary voltage threshold value, the output voltage adjusts the switching tube turn-off time.
A kind of 7. on-off circuit, it is characterised in that：Including power stage circuit and claim 1-6 any one of them on-off circuits
Control circuit,
The on-off circuit control circuit receives the voltage of rectifier bridge output and the output voltage signal of on-off circuit and output electricity
Signal is flowed, to produce the switch motion that switch controlling signal controls power switch pipe in the power stage circuit.
8. on-off circuit according to claim 7, it is characterised in that：The on-off circuit is LED drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347567.6A CN107947560A (en) | 2017-12-15 | 2017-12-15 | On-off circuit control circuit and on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347567.6A CN107947560A (en) | 2017-12-15 | 2017-12-15 | On-off circuit control circuit and on-off circuit |
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| CN107947560A true CN107947560A (en) | 2018-04-20 |
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| CN201711347567.6A Pending CN107947560A (en) | 2017-12-15 | 2017-12-15 | On-off circuit control circuit and on-off circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910225A (en) * | 2021-01-18 | 2021-06-04 | 杰华特微电子（杭州）有限公司 | Control method and control circuit of switch circuit and switch circuit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6552517B1 (en) * | 1999-11-16 | 2003-04-22 | Stmicroelectronics S.R.L. | Switch-type voltage regulator with reduction of occupied space for soft-start functions |
| KR20090125929A (en) * | 2008-06-03 | 2009-12-08 | 삼성전기주식회사 | Regulator with soft start |
| CN102904435A (en) * | 2012-10-15 | 2013-01-30 | 矽力杰半导体技术(杭州)有限公司 | Modified compensating circuit and switching power supply applying modified compensating circuit |
| CN103051220A (en) * | 2013-01-25 | 2013-04-17 | 杭州士兰微电子股份有限公司 | Switching power supply and controller thereof |
| CN203086362U (en) * | 2013-01-25 | 2013-07-24 | 杭州士兰微电子股份有限公司 | Switching power supply and controller thereof |
| US8626098B1 (en) * | 2012-09-28 | 2014-01-07 | Tahoe Rf Semiconductor, Inc. | Automatic gain control with programmable attack and decay times |
| CN106655749A (en) * | 2016-11-16 | 2017-05-10 | 杰华特微电子（杭州）有限公司 | Power supply control circuit and switch power supply applying same |
| CN207732638U (en) * | 2017-12-15 | 2018-08-14 | 杰华特微电子（杭州）有限公司 | A kind of switching circuit control circuit and switching circuit |
-
2017
- 2017-12-15 CN CN201711347567.6A patent/CN107947560A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6552517B1 (en) * | 1999-11-16 | 2003-04-22 | Stmicroelectronics S.R.L. | Switch-type voltage regulator with reduction of occupied space for soft-start functions |
| KR20090125929A (en) * | 2008-06-03 | 2009-12-08 | 삼성전기주식회사 | Regulator with soft start |
| US8626098B1 (en) * | 2012-09-28 | 2014-01-07 | Tahoe Rf Semiconductor, Inc. | Automatic gain control with programmable attack and decay times |
| CN102904435A (en) * | 2012-10-15 | 2013-01-30 | 矽力杰半导体技术(杭州)有限公司 | Modified compensating circuit and switching power supply applying modified compensating circuit |
| CN103051220A (en) * | 2013-01-25 | 2013-04-17 | 杭州士兰微电子股份有限公司 | Switching power supply and controller thereof |
| CN203086362U (en) * | 2013-01-25 | 2013-07-24 | 杭州士兰微电子股份有限公司 | Switching power supply and controller thereof |
| CN106655749A (en) * | 2016-11-16 | 2017-05-10 | 杰华特微电子（杭州）有限公司 | Power supply control circuit and switch power supply applying same |
| CN207732638U (en) * | 2017-12-15 | 2018-08-14 | 杰华特微电子（杭州）有限公司 | A kind of switching circuit control circuit and switching circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910225A (en) * | 2021-01-18 | 2021-06-04 | 杰华特微电子（杭州）有限公司 | Control method and control circuit of switch circuit and switch circuit |
| CN112910225B (en) * | 2021-01-18 | 2022-01-07 | 杰华特微电子股份有限公司 | Control method and control circuit of switch circuit and switch circuit |
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