CN106851905B - Wave crest detection circuit and peak detector - Google Patents
Wave crest detection circuit and peak detector Download PDFInfo
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- CN106851905B CN106851905B CN201710058128.7A CN201710058128A CN106851905B CN 106851905 B CN106851905 B CN 106851905B CN 201710058128 A CN201710058128 A CN 201710058128A CN 106851905 B CN106851905 B CN 106851905B
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- 230000005669 field effect Effects 0.000 claims abstract description 130
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- 238000005516 engineering process Methods 0.000 description 4
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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Abstract
A kind of wave crest detection circuit of present invention offer and peak detector, belong to LED drive circuit technical field.The wave crest detection circuit includes：Difference amplifier presets field-effect tube, and predetermined capacitive and bleeder circuit, the first end of difference amplifier are connect with the first end of default field-effect tube, and the second end of difference amplifier is connect with the first end of the second end of default field-effect tube and predetermined capacitive respectively；One end of bleeder circuit and the first end of predetermined capacitive connect；Wherein, input signal is input to default field-effect tube by difference amplifier for receiving input signal, and default field-effect tube is for exporting primary peak signal, bleeder circuit is used to carry out voltage division processing to primary peak signal by predetermined capacitive, generates secondary peak signal.Wave crest detection circuit provided by the invention and peak detector, realize the function of PFC sine wave harmonics.
Description
Technical field
The present invention relates to LED drive circuit technical field more particularly to a kind of wave crest detection circuit and peak detectors.
Background technology
Light emitting diode (Light Emitting Diode, abbreviation LED) is a kind of efficient lamps and lanterns, is widely used to
The fields such as various instructions, display, decoration, backlight, general lighting and urban landscape.LED lamp is generally required with power
Factor correcting (Power Factor Correction, abbreviation PFC) function, especially high-power LED driver, is LED light
Important component.
First module in PFC units is peak time detector, and shown in Figure 1, Fig. 1 provides for the prior art
A kind of peak time detector structural schematic diagram, the peak time detector 10 by preset peak detector 101, biased electrical
Potential source 102, comparator 103 and pulse generator 104 form.Wherein, it is by difference amplifier, N to preset peak detector 101
Type field-effect tube and capacitance are formed.Under conditions of input signal wave crest is stablized, which can detect
Each wave crest point.But when the wave crest of input signal is interfered or when power grid shakiness, shown in Figure 2, Fig. 2 is the prior art
A kind of generation schematic diagram of the wave crest signal provided, the wave crest of input signal will fluctuate up and down.At this point, some wave crest points will
It is missed, the PFC reference voltages of mistake is thus will produce, to cannot achieve the function of PFC sine wave harmonics.
It therefore, can be because wave crest point be missed, to cannot achieve PFC just using existing default peak detector 101
The function of string wave harmonic.
Invention content
A kind of wave crest detection circuit of present invention offer and peak detector, are missed to avoid wave crest point, to realize PFC
The function of sine wave harmonic.
The embodiment of the present invention provides a kind of wave crest detection circuit, including：
Difference amplifier presets field-effect tube, predetermined capacitive and bleeder circuit, the first end of the difference amplifier and institute
State the first end connection of default field-effect tube, the second end of the difference amplifier respectively with the default field-effect tube second
End is connected with the first end of the predetermined capacitive；One end of the bleeder circuit is connect with the first end of the predetermined capacitive；
Wherein, the difference amplifier is for receiving input signal, and the input signal is input to the default field
Effect pipe, the default field-effect tube is for exporting primary peak signal, and the bleeder circuit is for passing through the predetermined capacitive
Voltage division processing is carried out to primary peak signal, generates secondary peak signal.
In an embodiment of the present invention, the bleeder circuit includes：
Gate generator, buffer, power supply sub-circuit and partial pressure sub-circuit；The first end of the buffer with it is described
Gate generator connects, and the second end of the buffer is connect with the power supply sub-circuit, the third end of the buffer
It is connect with the first end of the partial pressure sub-circuit, the second end of the partial pressure sub-circuit is connect with the predetermined capacitive.
In an embodiment of the present invention, the partial pressure sub-circuit includes：
First power supply, the first field-effect tube, the second field-effect tube and third field-effect tube, one end point of first power supply
It is not connect with the grid of the drain electrode of first field-effect tube, the grid of the first field-effect tube and second field-effect tube, institute
The source electrode for stating the first field-effect tube is connect with the source electrode of second field-effect tube, the drain electrode of second field-effect tube with it is described
The source electrode of third field-effect tube connects, and the grid of the third field-effect tube is connect with the buffer, the third effect pipe
Drain electrode connect with the predetermined capacitive.
In an embodiment of the present invention, the power supply sub-circuit includes：
Second source, the first capacitance, the 4th field-effect tube and the 5th field-effect tube, one end of the second source respectively with
The drain electrode of the buffer, the grid of the 5th field-effect tube and the 5th field-effect tube connects, the 5th field-effect
The source electrode of pipe is connect with the drain electrode of the grid of the 4th field-effect tube and the 4th field-effect tube respectively, the 4th effect
Should the source electrode of pipe connect with the first end of first capacitance, the second end of first capacitance and the 5th field-effect tube
Drain electrode connection.
In an embodiment of the present invention, the default field-effect tube, first field-effect tube, second field-effect
Pipe, the third field-effect tube, the 4th field-effect tube and the 5th field-effect tube are N-type field-effect tube.
In an embodiment of the present invention, the current value of first power supply and the second source is 0.1 microampere；
Alternatively, the current value of first power supply and the second source is 2 microamperes.
The embodiment of the present invention also provides a kind of peak detector, including：
Wave crest detection circuit described in any of the above-described embodiment.
Wave crest detection circuit provided in an embodiment of the present invention and peak detector, which includes differential amplification
Device presets field-effect tube, predetermined capacitive and bleeder circuit.Wherein, the of the first end of difference amplifier and default field-effect tube
One end connects, and the second end of difference amplifier is connect with the first end of the second end of default field-effect tube and predetermined capacitive respectively；
One end of bleeder circuit and the first end of predetermined capacitive connect.It can be seen that wave crest detection circuit provided in an embodiment of the present invention,
By the way that bleeder circuit is arranged so that wave crest detection circuit can pass through the bleeder circuit pair before exporting primary peak signal
The primary peak signal carries out voltage division processing so that primary peak signal voltage is in that staged declines step by step, until this
One wave crest signal voltage is consistent with the defeated voltage of signal is inputted, and rises again with the input of input signal later, to generate
Secondary peak signal, later, so that it may with by the peak point of the secondary peak signal capture to input signal, to avoid wave crest point
It is missed, to realize the function of PFC sine wave harmonics.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to do one simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram for peak time detector that the prior art provides；
Fig. 2 is a kind of generation schematic diagram for wave crest signal that the prior art provides；
Fig. 3 is a kind of structural schematic diagram of wave crest detection circuit provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another wave crest detection circuit provided in an embodiment of the present invention；
Fig. 5 is a kind of generation schematic diagram of wave crest signal provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of peak detector provided in an embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Term " first ", " second ", " third " in description and claims of this specification and above-mentioned attached drawing, "
The (if present)s such as four " are for distinguishing similar object, without being used to describe specific sequence or precedence.It should manage
The data that solution uses in this way can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein, such as can be with
Sequence other than those of illustrating or describing herein is implemented.In addition, term " comprising " and " having " and their times
What is deformed, it is intended that cover it is non-exclusive include, for example, contain the process of series of steps or unit, method, system,
Product or equipment those of are not necessarily limited to clearly to list step or unit, but may include not listing clearly or for
The intrinsic other steps of these processes, method, product or equipment or unit.
It should be noted that these specific embodiments can be combined with each other below, for same or analogous concept
Or process may repeat no more in certain embodiments.
Fig. 3 is a kind of structural schematic diagram of wave crest detection circuit 30 provided in an embodiment of the present invention, and the embodiment of the present invention is only
It is to be illustrated by taking Fig. 3 as an example, but do not represent that present invention is limited only by this.It is shown in Figure 3, the wave crest detection circuit 30
May include：
Difference amplifier 301 presets field-effect tube 302, predetermined capacitive 303 and bleeder circuit 304, difference amplifier 301
First end connect with the first end of default field-effect tube 302, the second end of difference amplifier 301 respectively with default field-effect tube
302 second end is connected with the first end of predetermined capacitive 303；One end of bleeder circuit 304 connects with the first end of predetermined capacitive 303
It connects.
Wherein, difference amplifier 301 is for receiving input signal, and input signal is input to default field-effect tube 302,
Default field-effect tube 302 is used for through predetermined capacitive 303 for exporting primary peak signal, bleeder circuit 304 to primary peak
Signal carries out voltage division processing, generates secondary peak signal.
Wherein, input signal can be sine wave signal, or cosine wave signal, here, for input signal
Type, the present invention are not particularly limited.
In embodiments of the present invention, by the way that bleeder circuit 304 is arranged, its object is to：When the voltage fluctuation of input signal
Up and down when fluctuation, pass through bleeder circuit 304 so that wave crest detection circuit 30 can pass through before exporting primary peak signal
The bleeder circuit 304 carries out voltage division processing to the primary peak signal so that primary peak signal voltage is in ladder step by step
Formula declines, until the primary peak signal voltage is consistent with the defeated voltage of signal of input, later again with the input of input signal
And rise, to generate secondary peak signal, later, so that it may to pass through the peak value of the secondary peak signal capture to input signal
Point, is missed to avoid wave crest point, to realize the function of PFC sine wave harmonics.
Wave crest detection circuit 30 provided in an embodiment of the present invention, the wave crest detection circuit 30 include difference amplifier 301, in advance
If field-effect tube 302, predetermined capacitive 303 and bleeder circuit 304.Wherein, the first end of difference amplifier 301 and default field-effect
The first end of pipe 302 connects, the second end of difference amplifier 301 respectively with the second end of default field-effect tube 302 and default electric
Hold 303 first end connection；One end of bleeder circuit 304 is connect with the first end of predetermined capacitive 303.It can be seen that of the invention
The wave crest detection circuit 30 that embodiment provides, by the way that bleeder circuit 304 is arranged so that wave crest detection circuit 30 is in output first wave
Before peak-to-peak signal, voltage division processing can be carried out to the primary peak signal by the bleeder circuit 304 so that primary peak signal
Voltage is in that staged declines step by step, until the primary peak signal voltage is consistent with the defeated voltage of signal of input, Zhi Houzai
Rise with the input of input signal, to generate secondary peak signal, later, so that it may to be caught by the secondary peak signal
The peak point for grasping input signal, is missed to avoid wave crest point, to realize the function of PFC sine wave harmonics.
It is further, shown in Figure 4 on the basis of Fig. 3 corresponding embodiments based on the corresponding embodiments of Fig. 3,
Fig. 4 is the structural schematic diagram of another wave crest detection circuit 30 provided in an embodiment of the present invention, in the wave crest detection circuit 30
Bleeder circuit 304 may include：
Gate generator 3041, buffer 3042, power supply sub-circuit 3043 and partial pressure sub-circuit 3044；Buffer
3042 first end is connect with gate generator 3041, and the second end of buffer 3042 is connect with power supply sub-circuit 3043,
The third end of buffer 3042 is connect with the first end of partial pressure sub-circuit 3044, divides the second end of sub-circuit 3044 and default electricity
Hold 303 connections.
Further, partial pressure sub-circuit 3044 includes：
First power supply 30441, the first field-effect tube 30442, the second field-effect tube 30443 and third field-effect tube 30444,
One end of first power supply 30441 respectively with the drain electrode of the first field-effect tube 30442, the grid of the first field-effect tube 30442 and
The grid of two field-effect tube 30443 connects, and the source electrode of the source electrode of the first field-effect tube 30442 and the second field-effect tube 30443 connects
It connects, the drain electrode of the second field-effect tube 30443 is connect with the source electrode of third field-effect tube 30444, the grid of third field-effect tube 30444
Pole is connect with buffer 3042, and the drain electrode of third field-effect tube 30444 is connect with predetermined capacitive 303.
Optionally, power supply sub-circuit 3043 includes：
Second source 30431, the first capacitance 30432, the 4th field-effect tube 30433 and the 5th field-effect tube 30434, second
One end of power supply 30431 respectively with buffer 3042, the grid of the 5th field-effect tube 30434 and the 5th field-effect tube 30434
Drain electrode connection, the source electrode of the 5th field-effect tube 30434 respectively with the grid and the 4th field-effect tube of the 4th field-effect tube 30433
30433 drain electrode connection, the source electrode of the 4th field-effect tube 30433 are connect with the first end of the first capacitance 30432, the first capacitance
30432 second end is connect with the drain electrode of the 5th field-effect tube 30434.
Optionally, field-effect tube 302, the first field-effect tube 30442, the second field-effect tube 30443, third field-effect are preset
Pipe 30444, the 4th field-effect tube 30433 and the 5th field-effect tube 30434 are N-type field-effect tube.Certainly, the embodiment of the present invention
Only with default field-effect tube 302, the first field-effect tube 30442, the second field-effect tube 30443, third field-effect tube 30444,
4th field-effect tube 30433 and the 5th field-effect tube 30434 are to illustrate for N-type field-effect tube, but do not represent this
Invention is limited only to this.
Optionally, the current value of the first power supply 30441 and second source 30431 is 0.1 microampere；Alternatively, the first power supply
30441 and the current value of second source 30431 be 2 microamperes.
Exemplary, the embodiment of the present invention is only 0.1 with the current value of the first power supply 30441 and second source 30431
Microampere；It, specifically can be with alternatively, the current value of the first power supply 30441 and second source 30431 is to illustrate for 2 microamperes
It is configured according to actual needs, here, for the current value of the first power supply 30441 and second source 30431, the present invention is not done
Further limit.
In actual application, it is illustrated by taking sine wave as an example, the operation principle of wave crest detection circuit 30 is：Clock
Pulse generator 3041 is according to the sine wave period of input signal, and according to the discharge time of sine wave period and to decline ladder true
Timing clock pulses period and clock-pulse width.Shown in Fig. 4, gate generator 3041 generates clock pulse signal
Later, input signal of the clock pulse signal as buffer 3042, when discharging to reduce gate generator 3041
Switch-charge is injected and extracted from the influence to wave crest signal, can reduce gate generator by sub-circuit 3043 of powering
Switch-charge is injected and extracted from the influence to wave crest signal when 3041 electric discharge.The voltage of the power supply sub-circuit 3043 is imitated by the 4th
Should two series winding diodes of pipe 30433 and the 5th field-effect tube 30434 composition determine that and the first capacitance 30432 is for keeping
Therefore voltage can reduce the supply voltage of buffer 3042 by the power supply sub-circuit 3043 so that buffer 3042 is driving
When dynamic switch third field-effect tube 30444, reduce switch spike value, to reduce the influence to wave crest signal.In third field
After effect pipe 30444 is connected, the electric current of partial pressure is by the first field-effect tube 30442, the second field-effect tube 30443, third
Field-effect tube 30444 and the first power supply 30441 determine that the electric current of the first power supply 30441 passes through first field-effect tube 30442
The electric current of identical first power supply 30441 is mapped to the second field-effect tube 30443.
Shown in Figure 5, Fig. 5 is a kind of generation schematic diagram of wave crest signal provided in an embodiment of the present invention, works as input
Sine wave signal from as low as wave crest when, default field-effect tube 302 has stronger power supply capacity, and through the second field-effect tube
30443 and third field-effect tube 30444 extract electric current it is relatively weak so that wave crest signal with input signal rise and on
It rises, to reach crest value.Meanwhile by the default field-effect tube 302 and predetermined capacitive 303 of one-way conduction, it can make wave
The voltage of peak-to-peak signal is maintained on the crest value of input signal.Later, input sine wave signal is begun to decline from wave crest, and wave crest
Signal voltage is maintained on input signal crest value, in order to detect next week low peak sine wave signal, need to drop
The voltage of the low wave crest signal.After input sine wave signal declines from wave crest, default field-effect tube 302 may turn off, from when
The clock pulse signal that clock generator 3041 generates passes through buffer 3042, keeps the amplitude of clock pulse signal electric from first
Pressure drop is as low as second voltage, to drive third field-effect tube 30444, to reduce 30444 switch spike pair of third field-effect tube
The influence of wave crest signal so that primary peak signal voltage is in that staged declines step by step, until the primary peak signal electricity
Pressure is consistent with the voltage of input signal, then rises with the input of input signal, to generate secondary peak signal, so that it may with
It by the secondary peak signal capture to the peak point of input signal, is missed to avoid wave crest point, to realize PFC sine waves
The function of harmonic.It should be noted that in embodiments of the present invention, in a cycle the reduction of wave crest signal voltage pass through first
The electric current of power supply 30441 and the clock widths of clock pulse signal determine.
Fig. 6 is a kind of structural schematic diagram of peak detector 60 provided in an embodiment of the present invention, shown in Figure 6, should
Peak detector 60 may include：
Wave crest detection circuit 30 shown in any of the above-described embodiment.
Peak detector 60 shown in the embodiment of the present invention can execute technical solution shown in above method embodiment,
Its realization principle and advantageous effect are similar, are no longer repeated herein.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of wave crest detection circuit, which is characterized in that including：
Difference amplifier, presets field-effect tube, predetermined capacitive and bleeder circuit, the first end of the difference amplifier with it is described pre-
If the first end connection of field-effect tube, the second end of the difference amplifier respectively with the second end of the default field-effect tube and
The first end of the predetermined capacitive connects；One end of the bleeder circuit is connect with the first end of the predetermined capacitive；
Wherein, the difference amplifier is for receiving input signal, and the input signal is input to the default field-effect
Pipe, for exporting primary peak signal, the bleeder circuit is used for through the predetermined capacitive pair the default field-effect tube
One wave crest signal carries out voltage division processing, generates secondary peak signal；
The bleeder circuit includes：
Gate generator, buffer, power supply sub-circuit and partial pressure sub-circuit；The first end of the buffer and the clock
Pulse generator connects, and the second end of the buffer is connect with the power supply sub-circuit, the third end of the buffer and institute
The first end connection of partial pressure sub-circuit is stated, the second end of the partial pressure sub-circuit is connect with the predetermined capacitive.
2. circuit according to claim 1, which is characterized in that the partial pressure sub-circuit includes：
First power supply, the first field-effect tube, the second field-effect tube and third field-effect tube, one end of first power supply respectively with
The grid of the drain electrode of first field-effect tube, the grid of the first field-effect tube and second field-effect tube connects, and described the
The source electrode of one field-effect tube is connect with the source electrode of second field-effect tube, drain electrode and the third of second field-effect tube
The source electrode of field-effect tube connects, and the grid of the third field-effect tube is connect with the buffer, the third field-effect tube
Drain electrode is connect with the predetermined capacitive.
3. circuit according to claim 2, which is characterized in that the power supply sub-circuit includes：
Second source, the first capacitance, the 4th field-effect tube and the 5th field-effect tube, one end of the second source respectively with it is described
The drain electrode of buffer, the grid of the 5th field-effect tube and the 5th field-effect tube connects, the 5th field-effect tube
Source electrode is connect with the drain electrode of the grid of the 4th field-effect tube and the 4th field-effect tube respectively, the 4th field-effect tube
Source electrode connect with the first end of first capacitance, the drain electrode of the second end of first capacitance and the 5th field-effect tube
Connection.
4. circuit according to claim 3, which is characterized in that
It is the default field-effect tube, first field-effect tube, second field-effect tube, the third field-effect tube, described
4th field-effect tube and the 5th field-effect tube are N-type field-effect tube.
5. circuit according to claim 3, which is characterized in that
The current value of first power supply and the second source is 0.1 microampere；
Alternatively, the current value of first power supply and the second source is 2 microamperes.
6. a kind of peak detector, which is characterized in that including：
The claims 1-5 any one of them wave crest detection circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710058128.7A CN106851905B (en) | 2017-01-23 | 2017-01-23 | Wave crest detection circuit and peak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710058128.7A CN106851905B (en) | 2017-01-23 | 2017-01-23 | Wave crest detection circuit and peak detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106851905A CN106851905A (en) | 2017-06-13 |
| CN106851905B true CN106851905B (en) | 2018-09-28 |
Family
ID=59122521
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710058128.7A Active CN106851905B (en) | 2017-01-23 | 2017-01-23 | Wave crest detection circuit and peak detector |
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| Country | Link |
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| CN (1) | CN106851905B (en) |
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|---|---|---|---|---|
| US6784740B1 (en) * | 2002-12-20 | 2004-08-31 | Atheros Communications, Inc. | Power amplifier |
| CN102005923A (en) * | 2009-08-28 | 2011-04-06 | 电力集成公司 | Power supply controller with an input voltage compensation circuit |
| CN202818089U (en) * | 2012-08-31 | 2013-03-20 | 杭州士兰微电子股份有限公司 | Power factor correction circuit |
| CN105897016A (en) * | 2015-02-17 | 2016-08-24 | 富士电机株式会社 | Switching power supply circuit and power factor correction circuit |
| CN105916241A (en) * | 2016-05-18 | 2016-08-31 | 湖州绿明微电子有限公司 | Auxiliary power supply circuit, LED driving circuit and LED driver |
| CN205657888U (en) * | 2016-05-18 | 2016-10-19 | 湖州绿明微电子有限公司 | Auxiliary power circuit , LED drive circuit , LED driver |
| CN106332376A (en) * | 2016-10-26 | 2017-01-11 | 杰华特微电子（张家港）有限公司 | Ripple wave eliminating circuit and LED (light-emitting diode) control circuit |
| CN206674233U (en) * | 2017-01-23 | 2017-11-24 | 福建省云潮智能科技有限公司 | Crest detects circuit and peak detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6717574B2 (en) * | 2001-06-19 | 2004-04-06 | Aiptek International Inc. | Feedback peak detector fitted wireless handwriting tablet |
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2017
- 2017-01-23 CN CN201710058128.7A patent/CN106851905B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6784740B1 (en) * | 2002-12-20 | 2004-08-31 | Atheros Communications, Inc. | Power amplifier |
| CN102005923A (en) * | 2009-08-28 | 2011-04-06 | 电力集成公司 | Power supply controller with an input voltage compensation circuit |
| CN202818089U (en) * | 2012-08-31 | 2013-03-20 | 杭州士兰微电子股份有限公司 | Power factor correction circuit |
| CN105897016A (en) * | 2015-02-17 | 2016-08-24 | 富士电机株式会社 | Switching power supply circuit and power factor correction circuit |
| CN105916241A (en) * | 2016-05-18 | 2016-08-31 | 湖州绿明微电子有限公司 | Auxiliary power supply circuit, LED driving circuit and LED driver |
| CN205657888U (en) * | 2016-05-18 | 2016-10-19 | 湖州绿明微电子有限公司 | Auxiliary power circuit , LED drive circuit , LED driver |
| CN106332376A (en) * | 2016-10-26 | 2017-01-11 | 杰华特微电子（张家港）有限公司 | Ripple wave eliminating circuit and LED (light-emitting diode) control circuit |
| CN206674233U (en) * | 2017-01-23 | 2017-11-24 | 福建省云潮智能科技有限公司 | Crest detects circuit and peak detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106851905A (en) | 2017-06-13 |
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