CN207589216U - Adaptive fast response circuit and LED drive circuit - Google Patents
Adaptive fast response circuit and LED drive circuit Download PDFInfo
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- CN207589216U CN207589216U CN201720631678.9U CN201720631678U CN207589216U CN 207589216 U CN207589216 U CN 207589216U CN 201720631678 U CN201720631678 U CN 201720631678U CN 207589216 U CN207589216 U CN 207589216U
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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]
- H05B45/40—Details of LED load circuits
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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]
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a kind of adaptive fast response circuit and LED drive circuits.Detection load negative terminal peak value and the voltage at valley moment, and obtain the reference signal of characterization peak valley voltage difference through operation；Negative terminal voltage is loaded by sampling, obtain the voltage sampling signal of characterization load negative terminal voltage, the voltage sampling signal and the reference signal of the characterization peak valley voltage difference are compared, and when the voltage sampling signal reaches the reference signal of the characterization peak valley voltage difference, then carry out quick response.The utility model can change adaptive adjustment quick response threshold value according to input, it is ensured that excellent to go have good dynamic characteristic while ripple effect.
Description
Technical field
The utility model is related to a kind of power electronics field, more particularly to a kind of adaptive fast response circuit and
LED drive circuit.
Background technology
Under the application scenarios such as voltage regulator circuit, LED drive circuit, according to the needs of load, it is sometimes desirable to add in line
Wave cancellation module, to reduce the ripple in circuit.Since ripple cancellation module needs to be filtered power frequency component, so that its
Frequency be much smaller than power frequency, but this also bring along one it is new the technical issues of, that is, cause system response it is slack-off.By taking LED is dimmed as an example,
When being dimmed to LED load, the electric current for flowing through load changes, and since circuit response is slower, may cause LED load
Negative terminal voltage leapt high, influence the normal work of circuit.
For the above-mentioned prior art the problem of, the prior art by bleeder circuit sample load negative terminal voltage, and by its
It is compared with respective threshold, when meeting or exceeding the respective threshold, then adjusts the benchmark in ripple cancellation module, so as to real
Existing quick response.As shown in Figure 1, illustrating the circuit structure of the fast response circuit of the prior art, in order to simplify the view, omit
Bleeder circuit, negative terminals of the VD as load judge and compare the voltage of load negative terminal, when it is more than threshold value VT1, then make out
S1 conductings are closed to adjust the benchmark in ripple cancellation module, realize quick response, when it is less than threshold value VT2, then make switch S1
It disconnects.The prior art can not carry out adaptive quick response according to the amplitude of variation of input.
Utility model content
The purpose of this utility model is to provide a kind of adaptive fast response circuit and LED drive circuit, existing for solving
There is the technical issues of can not realizing adaptive quick response of quick response existing for technology, so as to fulfill adaptive quick sound
Should, be conducive to the simplification of system.
To achieve the above object, the utility model provides a kind of adaptive fast response circuit, including：
The voltage of peak valley voltage difference detection circuits, detection load negative terminal peak value and valley, and obtain characterization peak valley through operation
The reference signal of voltage difference；
Wherein, negative terminal voltage is loaded by sampling, obtains the voltage sampling signal of characterization load negative terminal voltage, the voltage
The reference signal of sampled signal and the characterization peak valley voltage difference is compared, when the voltage sampling signal reaches the characterization
During the reference signal of peak valley voltage difference, then quick response is carried out.
Optionally, the reference signal of the characterization peak valley voltage difference refers to the letter proportional to the peak valley voltage difference
Number or, to the proportional signal of the sum of the peak valley voltage difference and bias voltage.
Optionally, the peak valley voltage difference detection circuits are led to for detecting the crest voltage and valley point voltage of load negative terminal
The voltage of over-sampling load negative terminal simultaneously obtains the signal of characterization crest voltage and the signal of characterization valley point voltage through operation.
Optionally, the peak valley voltage difference detection circuits include peak valley moment detection circuit and sampling hold circuit, institute
The voltage change ratio of peak valley moment detection circuit detection load negative terminal is stated, and itself and change rate threshold value are compared, obtains table
The sign load peak value of negative terminal voltage and the signal at valley moment；The sampling hold circuit loads negative terminal voltage according to the characterization
Peak value and the signal at valley moment, make sampling holding processing to load negative terminal voltage at peak value and valley moment respectively, with
To the signal of characterization peak value moment load negative terminal voltage and valley moment load negative terminal voltage signal, the two is characterized as difference
The reference signal of peak valley voltage difference.
Optionally, load negative terminal peak value will be characterized and the voltage at valley moment makees the positive value after difference as peak valley voltage difference,
Make ratio processing to the peak valley voltage difference or ratio processing is made to the sum of the peak valley voltage difference and bias voltage, obtain table
Levy the reference signal of the peak valley voltage difference.
Optionally, the quick response refers to the adjusting voltage by changing ripple cancellation module, is born with quick adjusting
Load with terminal voltage.
Optionally, the peak valley moment detection circuit includes voltage change ratio detection module and first comparator, the electricity
Buckling rate detection module receives the signal of characterization load negative terminal voltage, and detects its voltage change ratio, and it is negative to obtain characterization load
The signal of terminal voltage change rate, one of input terminal of the first comparator receive the characterization load negative terminal voltage variation
The signal of rate, another input terminal then receive the reference signal for characterizing the change rate threshold value, and the first comparator exports table
Levy peak value and the signal at valley moment.
Optionally, the peak valley moment detection circuit further includes logic circuit, and the logic circuit receives the characterization
Peak value and the signal at valley moment, and the two is detached, output respectively characterizes the signal of peak value moment and characterizes the valley moment
Signal, the sampling hold circuit receive the signal and the signal at characterization valley moment of the characterization peak value moment respectively, and divide
Load negative terminal voltage is not sampled in peak value moment and valley moment, obtains the crest voltage and valley of characterization load negative terminal
The signal of voltage.
Optionally, the logic circuit include frequency dividing circuit, phase inverter and with door, the output terminal of the first comparator
Respectively with the input terminal of the frequency dividing circuit and it is described connect with one of input terminal of door, the output terminal of the frequency dividing circuit
It is connect with the sampling hold circuit, the input terminal of the output terminal of frequency dividing circuit also with the phase inverter is connect, the phase inverter
Output terminal connect with described with another input terminal of door, it is described to be connect with the output terminal of door with the sampling hold circuit.
Optionally, the crest voltage of the characterization load negative terminal and the signal of valley point voltage are made in subtracter at difference
Reason obtains the signal of characterization peak valley voltage difference, the signal input proportion adjustment of the characterization peak valley voltage difference after taking absolute value
Circuit obtains the ratio signal of the characterization peak valley voltage difference proportional to peak valley voltage difference.
Optionally, by the second comparator to the voltage sampling signal of characterization load negative terminal voltage and the characterization peak-trough electricity
The reference signal of pressure difference is compared, when the signal of the characterization load negative terminal voltage reaches the reference signal signal, then
The adjusting voltage of ripple cancellation module is adjusted to adjust load negative terminal voltage.
Optionally, the output terminal output fast-response control signal of second comparator, as described in receiving adjustment module
Fast-response control signal, and output regulation signal is to ripple cancellation module.
The utility model also provides a kind of LED drive circuit, including：
A kind of adaptive fast response circuit of any of the above and ripple cancellation module, the adaptive fast response circuit
Output terminal is connect with the ripple cancellation module, and the ripple cancellation module is connected with load.
Compared with prior art, the technical solution of the utility model has the following advantages：Load negative terminal is obtained by detection
Crest voltage and valley point voltage, so as to obtain characterization peak valley voltage difference reference signal, will load negative terminal voltage sample letter
It number is compared with the reference signal, the adjustment module is controlled according to comparison result, so as to adjust ripple cancellation module
Adjusting voltage, to realize quick response.The utility model can change according to input realizes quick response, so as to adjust load
Negative terminal voltage simplifies system complexity.
Description of the drawings
Fig. 1 is the structure diagram of prior art fast response circuit；
Fig. 2 is the principle schematic diagram of the adaptive fast response circuit of the utility model；
Fig. 3 is particular circuit configurations schematic diagram of the utility model based on Fig. 2；
Fig. 4 is the structure diagram of adjustment module and ripple cancellation module.
Specific embodiment
The preferred embodiment of the utility model is described in detail, but the utility model is not merely below in conjunction with attached drawing
It is limited to these embodiments.The utility model covers any replacement made in the spirit and scope of the utility model, modification, equivalent
Method and scheme.
In order to which the public is made to have thorough understanding to the utility model, in following the preferred embodiment in the utility model specifically
Understand concrete details, and description without these details can also understand that this practicality is new completely for a person skilled in the art
Type.
The utility model is more specifically described by way of example with reference to attached drawing in the following passage.It should be noted that attached drawing
Using more simplified form and using non-accurate ratio, only to it is convenient, lucidly aid in illustrating the utility model
The purpose of embodiment.
As shown in Fig. 2, illustrate a kind of basic circuit structure of the adaptive fast response circuit of the utility model.Main packet
The voltage of peak valley voltage difference detection circuits, the peak valley voltage difference detection circuits detection load negative terminal peak value and valley is included, and is passed through
Operation obtains the reference signal Vref of characterization peak valley voltage difference.A variety of realizations may be used in the peak valley voltage difference detection circuits
Determining, and detect crest voltage and paddy again in peak value and valley moment for peak value and valley moment is described in detail in mode, Fig. 3
Threshold voltage.No matter using which kind of form, the peak valley voltage difference detection circuits contain detection load negative terminal crest voltage and
The function of valley point voltage loads the voltage of negative terminal by sampling and obtains the signal of characterization crest voltage and characterization valley through operation
The signal of voltage, the mode that pure digi-tal mode, pure analog form or modulus mixing may be used are realized.Pure digi-tal mode for example,
Using high-speed AD converter, by being higher than the sampling of power frequency, when the value sampled is more than threshold value after directly or indirectly processing
When or during for extreme value in a period of time, then be judged as peak value or valley, the pressure difference that both can be obtained by operation.Pure simulation
Mode is then for example, by the load negative terminal voltage during sampling centainly, by way of amplifier, capacitance and switch connection so that
Voltage follow load negative terminal voltage on capacitance, so that voltage can be used for characterizing peak value and the paddy of load negative terminal on capacitance
Threshold voltage, and periodically carry out electric discharge update.The utility model emphasis is realized in a manner of analog- and digital- mixing.
Wherein, negative terminal voltage is loaded by sampling, obtains the voltage sampling signal Vs of characterization load negative terminal voltage, the electricity
Pressure sampled signal Vs and the reference signal Vref of the characterization peak valley voltage difference are compared, when the voltage sampling signal Vs reaches
To it is described characterization peak valley voltage difference reference signal Vref when, then carry out quick response.Although it illustrates second in attached drawing to compare
Device comp2 is used for the comparison of voltage sampling signal Vs and reference signal Vref, but is not limited to this mode, and comparing function also can be straight
It is connected in peak valley voltage difference detection circuits and realizes.It is described quick accordingly then to pass through voltage sampling signal Vs and reference signal Vref
After comparing, fast-response control signal is exported, the fast-response control signal is received by adjustment module, ripple is eliminated
The mould voltage in the block that adjusts is adjusted.
As shown in figure 3, a kind of particular circuit configurations of the adaptive fast response circuit of the utility model are illustrated, based on attached
Fig. 2, the peak valley voltage difference detection circuits include peak valley moment detection circuit and sampling hold circuit, the peak valley moment inspection
The voltage change ratio of slowdown monitoring circuit detection load negative terminal, and itself and change rate threshold value are compared, obtain characterization load negative terminal electricity
Press the peak value of VD and the signal at valley moment；The sampling hold circuit loads peak value and the paddy of negative terminal voltage according to the characterization
It is worth the signal at moment, makees sampling holding processing to load negative terminal voltage in peak value and valley moment respectively, obtains characterization peak value
Moment loads the signal of negative terminal voltage and valley moment load negative terminal voltage；
After the signal of the load negative terminal voltage of load negative terminal voltage and valley moment to the peak value moment makees difference processing
It takes absolute value, obtains the signal of characterization peak valley voltage difference, ratio processing is made to the peak valley voltage difference, obtains characterizing the peak valley
The reference signal Vref of voltage difference, the voltage sampling signal of the characterization load negative terminal voltage are carried out with the reference signal Vref
Compare, when the voltage sampling signal Vs reaches the reference signal Vref, then carry out quick response.
The peak valley moment detection circuit includes voltage change ratio detection module dv/dt, first comparator comp1 and logic
Circuit, the voltage change ratio detection module dv/dt receive the signal of characterization load negative terminal voltage VD, and detect its voltage change
Rate, obtains the signal of characterization load negative terminal voltage change rate, and one of input terminal of the first comparator comp1 receives institute
The signal of characterization load negative terminal voltage change rate is stated, another input terminal then receives the reference signal for characterizing the change rate threshold value
VREF1, the first comparator comp1, which is exported, characterizes peak value and the signal at valley moment.Due to needing sampled peak and paddy respectively
It is worth the load negative terminal voltage value at moment, therefore, after the logic circuit receives the characterization peak value and the signal at valley moment,
It needs to detach the two, respectively the signal of output characterization peak value moment and the signal at characterization valley moment, the sampling keeps electricity
Road receives the signal and the signal at characterization valley moment of the characterization peak value moment respectively, and respectively in peak value moment and valley
It carves and load negative terminal voltage is sampled, obtain the crest voltage of characterization load negative terminal and the signal of valley point voltage.
Characterization peak value and the signal at valley moment are detached, mainly realized by logic circuit.The logic circuit
Including frequency dividing circuit (in the present embodiment be frequency-halving circuit f/2), phase inverter and with door, the first comparator comp1's is defeated
Outlet respectively with the input terminal of the frequency dividing circuit and it is described connect with one of input terminal of door, the frequency dividing circuit it is defeated
Outlet is connect with the sampling hold circuit, and the input terminal of the output terminal of frequency dividing circuit also with the phase inverter is connect, described anti-
The output terminal of phase device is connect with described with another input terminal of door, and the output terminal with door connects with the sampling hold circuit
It connects.It can be seen that the output terminal of frequency dividing circuit and with the output terminal of door export respectively peak value moment and valley moment signal or
Person, the output terminal of frequency dividing circuit and the signal for exporting valley moment and peak value moment respectively with the output terminal of door.Therefore, this practicality
Novel which is not distinguished strictly is partly peak value moment, which is partly the valley moment, and only detaches two moment,
May be just after mathematic interpolation because of the difference that the utility model both only needs to acquire, it is also possible to be negative, therefore need into
Row absolute value block/x/ carries out absolute value processing.The crest voltage of the characterization load negative terminal and the signal of valley point voltage are subtracting
Make difference processing in musical instruments used in a Buddhist or Taoist mass, the signal of characterization peak valley voltage difference, the letter of the characterization peak valley voltage difference are obtained after taking absolute value
Number input proportion adjustment circuit k, obtains the reference signal Vref of proportional to peak valley voltage difference characterization peak valley voltage difference, wherein
The proportionality coefficient of proportion adjustment circuit is K.
The signal of characterization load negative terminal voltage is compared with the scaling signal by the second comparator comp2, when
When the signal of the characterization load negative terminal voltage reaches the reference signal Vref signal, then the adjusting of ripple cancellation module is adjusted
Voltage is to adjust load negative terminal voltage.The output terminal output fast-response control signal of the second comparator comp2, by adjusting
Module receives the fast-response control signal, and output regulation signal is to ripple cancellation module.The ripple cancellation module
One end with load negative terminal connect, the other end is connected to ground.
In the utility model, it is described characterization peak valley voltage difference reference signal refer to the peak valley voltage difference into than
The signal of example or, to the proportional signal of the sum of the peak valley voltage difference and bias voltage, in order to explain circuit in detail
Structure and principle, therefore be only described in detail for the former above.For " the sum of with the peak valley voltage difference and bias voltage
Situation of the proportional signal " as the reference signal of peak valley voltage difference " described characterization ", then can on the basis of Fig. 3,
Increasing between absolute value block/x/ and proportion adjustment circuit k can realize " the sum of the peak valley voltage difference and bias voltage "
Circuit module, for example, adder, etc..The bias voltage can be definite value, can also adaptive change or by control believe
It number is controlled.
As shown in figure 4, illustrate the circuit structure of adjustment module and ripple cancellation module.The adjustment module includes electricity
Stream source I03 is connect with switch S1, the switch S1 with the output terminal of the second comparator comp2.The adjustment module and line
Wave cancellation module connects, wherein, ripple cancellation module includes adjustment pipe M01, current generating circuit, the electricity of current source I01 and first
Appearance C01, the adjustment pipe M01 described in the present embodiment use NMOS, and first end is drain electrode, and second end is source electrode, is controlled
End processed is grid.The negative terminal of LED load is connected to the drain electrode (i.e. first end) of adjustment pipe M01, adjusts the source electrode (i.e. the of pipe M01
Two ends) it is connected to ground.Current generating circuit is connected between the drain and gate (i.e. control terminal) of adjustment pipe M01.Current source I01 and
First capacitance C01 is in parallel, and is connected between the grid and ground of adjustment pipe M01.Adjust the control terminal of pipe M01, i.e. the first capacitance
One end of C01 is connect with the adjustment module, to receive benchmark Regulate signal.
The filter circuit that first capacitance C01 and current generating circuit and current source I01 are formed, time constant are much larger than
Power frequency period, therefore the voltage on the first capacitance C01 is approximately not have ripple DC voltage so that the electric current for being adjusted pipe is near
Like the DC current for being no ripple, reduce so as to fulfill the current ripples Jing Guo LED load, input current ripple passes through input
Capacitance is converted into the voltage ripple at the drain-source end of adjustment pipe, and the drain-source end electricity of adjustment pipe can be controlled by the value for setting current source
Emboss the DC component of wave.First capacitance C01 is the capacitive element of ripple cancellation module in the realization method, and adjustment module exports
Benchmark Regulate signal the common end of the first capacitance C01 and current generating circuit are pulled up, i.e., to the first capacitance C01 carry out
Charging.Although in the present embodiment, current generating circuit employs the realization method of current source, it is also possible to use current source with
Outer realization method, for example, resistance, etc., part explanation is equally applicable to other embodiment.
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
It can 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 (10)
1. a kind of adaptive fast response circuit, including：
The voltage of peak valley voltage difference detection circuits, detection load negative terminal peak value and valley, and obtain characterization peak valley voltage through operation
The reference signal of difference；
Wherein, negative terminal voltage is loaded by sampling, obtains the voltage sampling signal of characterization load negative terminal voltage, the voltage sample
Signal and the reference signal of the characterization peak valley voltage difference are compared, when the voltage sampling signal reaches the characterization peak valley
During the reference signal of voltage difference, then quick response is carried out.
2. adaptive fast response circuit according to claim 1, it is characterised in that：The reference of the characterization peak valley voltage difference
Signal refer to the signal proportional to the peak valley voltage difference or, with the sum of the peak valley voltage difference and bias voltage into than
The signal of example.
3. adaptive fast response circuit according to claim 1, it is characterised in that：The peak valley voltage difference detection circuits are used
In the crest voltage and valley point voltage of detection load negative terminal, the voltage of negative terminal is loaded by sampling and obtains characterization peak value through operation
The signal of voltage and the signal of characterization valley point voltage.
4. adaptive fast response circuit according to claim 1, it is characterised in that：The peak valley voltage difference detection circuits
Including peak valley moment detection circuit and sampling hold circuit, the voltage change of the peak valley moment detection circuit detection load negative terminal
Rate, and itself and change rate threshold value are compared, obtain the characterization load peak value of negative terminal voltage and the signal at valley moment；It is described
Sampling hold circuit loads the peak value of negative terminal voltage and the signal at valley moment according to the characterization, respectively in peak value and valley
It carves and makees sampling holding processing to load negative terminal voltage, to obtain the characterization peak value moment load signal of negative terminal voltage and valley moment
Negative terminal voltage signal is loaded, making difference to the two obtains the reference signal of characterization peak valley voltage difference.
5. adaptive fast response circuit according to claim 2, it is characterised in that：By characterization load negative terminal peak value and valley
Positive value after the voltage work difference at moment makees ratio processing or to the peak valley as peak valley voltage difference to the peak valley voltage difference
The sum of voltage difference and bias voltage make ratio processing, obtain characterizing the reference signal of the peak valley voltage difference.
6. the adaptive fast response circuit according to claims 1 or 2 or 4, it is characterised in that：The quick response is
Refer to the adjusting voltage by changing ripple cancellation module, negative terminal voltage is loaded with quick adjusting.
7. adaptive fast response circuit according to claim 4, it is characterised in that：The peak valley moment detection circuit packet
Voltage change ratio detection module and first comparator are included, the voltage change ratio detection module receives characterization load negative terminal voltage
Signal, and its voltage change ratio is detected, the signal of characterization load negative terminal voltage change rate is obtained, the first comparator is wherein
One input terminal receives the signal of the characterization load negative terminal voltage change rate, another input terminal then receives the characterization variation
The reference signal of rate threshold value, the first comparator output characterization peak value and the signal at valley moment.
8. adaptive fast response circuit according to claim 7, it is characterised in that：The peak valley moment detection circuit is also
Including logic circuit, the logic circuit receives the characterization peak value and the signal at valley moment, and the two is detached, respectively
The signal and the signal at characterization valley moment, the sampling hold circuit of output characterization peak value moment receive the characterization peak respectively
It is worth the signal at moment and the signal at characterization valley moment, and load negative terminal voltage is carried out in peak value moment and valley moment respectively
Sampling obtains the crest voltage of characterization load negative terminal and the signal of valley point voltage.
9. adaptive fast response circuit according to claim 8, it is characterised in that：The logic circuit includes frequency dividing
Circuit, phase inverter and with door, the output terminal of the first comparator respectively with the input terminal of the frequency dividing circuit and described and door
The connection of one of input terminal, the output terminal of the frequency dividing circuit connect with the sampling hold circuit, frequency dividing circuit it is defeated
Input terminal of the outlet also with the phase inverter is connect, and the output terminal of the phase inverter connects with described another input terminal with door
It connects, it is described to be connect with the output terminal of door with the sampling hold circuit.
10. a kind of LED drive circuit, including：Any one adaptive fast response circuit and ripple in more than claim 1-9
Cancellation module, the output terminal of the adaptive fast response circuit are connect with the ripple cancellation module, and the ripple eliminates mould
Block is connected with load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2016211660137 | 2016-10-26 | ||
| CN201621166013 | 2016-10-26 |
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| CN201710407250.0A Active CN107426859B (en) | 2016-10-26 | 2017-06-02 | Self-adaptive quick response circuit, quick response method and LED driving circuit |
| CN201720631678.9U Withdrawn - After Issue CN207589216U (en) | 2016-10-26 | 2017-06-02 | Adaptive fast response circuit and LED drive circuit |
| CN201710407368.3A Active CN107094333B (en) | 2016-10-26 | 2017-06-02 | Self-adaptive quick response circuit, quick response method and LED drive circuit |
| CN201720639585.0U Active CN207083253U (en) | 2016-10-26 | 2017-06-02 | A kind of adaptive fast response circuit and LED drive circuit |
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| CN201720639585.0U Active CN207083253U (en) | 2016-10-26 | 2017-06-02 | A kind of adaptive fast response circuit and LED drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107094333A (en) * | 2016-10-26 | 2017-08-25 | 杰华特微电子（张家港）有限公司 | Adaptive fast response circuit, fast response method and LED drive circuit |
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| CN110504951A (en) * | 2019-08-16 | 2019-11-26 | 杰华特微电子（杭州）有限公司 | The control circuit and control method of switching circuit |
| CN114200190B (en) * | 2021-12-14 | 2024-04-09 | 成都思瑞浦微电子科技有限公司 | Voltage difference detection circuit |
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| CN205622483U (en) * | 2016-01-05 | 2016-10-05 | 杰华特微电子（杭州）有限公司 | Peak current detection compensating circuit |
| CN105634279B (en) * | 2016-03-25 | 2018-03-20 | 东南大学 | A kind of method for improving single inductor multi-output power converter load transient response |
| CN107426859B (en) * | 2016-10-26 | 2023-07-25 | 杰华特微电子（张家港）有限公司 | Self-adaptive quick response circuit, quick response method and LED driving circuit |
-
2017
- 2017-06-02 CN CN201710407250.0A patent/CN107426859B/en active Active
- 2017-06-02 CN CN201720631678.9U patent/CN207589216U/en not_active Withdrawn - After Issue
- 2017-06-02 CN CN201710407368.3A patent/CN107094333B/en active Active
- 2017-06-02 CN CN201720639585.0U patent/CN207083253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094333A (en) * | 2016-10-26 | 2017-08-25 | 杰华特微电子（张家港）有限公司 | Adaptive fast response circuit, fast response method and LED drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107426859B (en) | 2023-07-25 |
| CN107426859A (en) | 2017-12-01 |
| CN207083253U (en) | 2018-03-09 |
| CN107094333A (en) | 2017-08-25 |
| CN107094333B (en) | 2020-01-14 |
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