CN107426859B - Self-adaptive quick response circuit, quick response method and LED driving circuit - Google Patents
Self-adaptive quick response circuit, quick response method and LED driving circuit Download PDFInfo
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- CN107426859B CN107426859B CN201710407250.0A CN201710407250A CN107426859B CN 107426859 B CN107426859 B CN 107426859B CN 201710407250 A CN201710407250 A CN 201710407250A CN 107426859 B CN107426859 B CN 107426859B
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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]
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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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- 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]
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- 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 invention discloses a self-adaptive quick response circuit, a quick response method and an LED driving circuit. Detecting the peak voltage of the negative end of the load to obtain a sampling signal representing the peak voltage, and obtaining a reference signal of the negative end of the load according to the sampling signal of the peak voltage; and when the voltage sampling signal reaches the reference signal of the negative end of the load, quick response is performed. The invention can adaptively adjust the quick response threshold according to the input change, ensures excellent ripple removal effect and has good dynamic characteristics.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a self-adaptive quick response circuit, a quick response method and an LED driving circuit.
Background
In applications such as voltage regulation circuits and LED driving circuits, a ripple cancellation module is sometimes added to reduce ripple in the circuit according to the load requirements. Since the ripple cancellation module needs to filter the power frequency signal so that the frequency is far less than the power frequency, this also brings a new technical problem, namely, slowing down the system response. For example, when the LED load is dimmed, the current flowing through the load changes, and the circuit response is slow, which may cause the voltage of the negative terminal of the LED load to be fluctuated, so that the normal operation of the circuit is affected.
In order to solve the problems of the prior art, the prior art samples the voltage of the negative end of the load through a voltage dividing circuit and compares the voltage with a corresponding threshold value, and when the corresponding threshold value is reached or exceeded, the reference in the ripple cancellation module is adjusted, so that quick response is performed. I.e. the threshold is a fixed threshold which needs to be calculated and set according to different external applications, otherwise the fast response effect is affected. As shown in fig. 1, a circuit structure of a prior art fast response circuit is illustrated, a voltage divider circuit is omitted for simplifying the view, VD is used as a negative terminal of a load, and a voltage of the negative terminal of the load is determined and compared, when the voltage is greater than a threshold VT1, a switch S1 is turned on to adjust a reference in a ripple cancellation module, so as to implement fast response, and when the voltage is less than a threshold VT2, the switch S1 is turned off. But this technique does not allow for an adaptive fast response based on the magnitude of the input change.
Disclosure of Invention
The invention aims to provide a self-adaptive quick response circuit, a quick response method and an LED driving circuit, which are used for solving the technical problem that the self-adaptive quick response cannot be realized in the prior art and are beneficial to the simplification of a system.
To achieve the above object, the present invention provides an adaptive fast response circuit, comprising:
the peak detection circuit is used for detecting the peak voltage of the negative end of the load to obtain a sampling signal representing the peak voltage, and obtaining a reference signal of the negative end of the load according to the sampling signal of the peak voltage;
and when the voltage sampling signal reaches the reference signal of the negative end of the load, quick response is performed.
Optionally, the sampled signal of the peak voltage characterizes the peak voltage of the current period or characterizes a weighted average of the previous m times of peak voltages.
Optionally, the reference signal of the negative terminal of the load is obtained by superposition bias voltage or/and proportional operation of the sampling signal of the peak voltage.
Optionally, the peak detection circuit includes a first operational amplifier, a first switch and a first capacitor, a first input end of the first operational amplifier is connected with a load negative end, an output end of the first operational amplifier is connected with a control end of the first switch, the first switch is connected with the first capacitor in series, a common end of the first switch and the first capacitor is connected with a second input end of the first operational amplifier, and a voltage on the first capacitor is used as a sampling signal of the peak voltage.
Optionally, the first capacitor is connected with a second switch in parallel, and the first capacitor is discharged by controlling the conduction of the second switch.
Optionally, the peak detection circuit includes a peak time detection circuit and a sample-hold circuit, the peak time detection circuit detects a peak time of a negative end of the load, and the sample-hold circuit samples and holds the negative end of the load according to the peak time to obtain a sampled signal of the peak voltage.
Optionally, the peak time detection circuit includes a slope detection module, where the slope detection module is configured to detect a rate of change of a voltage at a negative end of the load, and determine a peak time according to the rate of change of the voltage, to obtain a signal representing the peak time of the voltage at the negative end of the load; and the sample hold circuit samples and holds the negative end of the load according to the signal representing the peak time of the voltage of the negative end of the load.
Optionally, the peak detection circuit continuously samples the negative load terminal, compares a signal representing the negative load terminal voltage with a first variable reference, adds a step length to the first variable reference at intervals when the signal representing the negative load terminal voltage is greater than or equal to the first variable reference until the signal representing the negative load terminal voltage is less than the second variable reference, and takes the value of the first variable reference at the moment as a sampling signal representing the peak voltage; the second variable reference varies with the first variable reference and is lower than the first variable reference.
Optionally, the voltage sampling signal representing the negative load voltage is compared with the reference signal representing the peak voltage by the first comparator, and when the voltage sampling signal representing the negative load voltage reaches the reference signal of the peak voltage, the adjusting voltage of the ripple cancellation module is adjusted to adjust the negative load voltage.
Optionally, the output end of the first comparator outputs a fast response control signal, and the adjusting module receives the fast response control signal and outputs an adjusting signal to the ripple eliminating module.
The invention also provides a quick response method, which comprises the following steps:
detecting the peak voltage of the negative end of the load to obtain a sampling signal representing the peak voltage, and obtaining a reference signal of the negative end of the load according to the sampling signal of the peak voltage;
the method comprises the steps of obtaining a voltage sampling signal representing the voltage of a load negative terminal by sampling the voltage of the load negative terminal, comparing the voltage sampling signal with a reference signal of the load negative terminal, and performing quick response when the voltage sampling signal reaches the reference signal of the load negative terminal;
the sampled signal of the peak voltage characterizes the peak voltage of the current period or characterizes a weighted average of the previous m times of peak voltages.
The present invention also provides an LED driving circuit including:
the self-adaptive quick response circuit and the ripple cancellation module are characterized in that the output end of the self-adaptive quick response circuit is connected with the ripple cancellation module, and the ripple cancellation module is connected with a load.
Compared with the prior art, the technical scheme of the invention has the following advantages: the peak voltage of the negative end of the load is obtained through detection, so that a reference signal representing the peak voltage is obtained, a voltage sampling signal of the negative end of the load is compared with the reference signal, and the adjusting module is controlled according to a comparison result, so that the adjusting voltage of the ripple eliminating module is adjusted, and quick response is realized. The invention can realize self-adaptive quick response according to the input change, thereby adjusting the voltage of the negative terminal of the load and simplifying the complexity of the system.
Drawings
FIG. 1 is a schematic diagram of a prior art fast response circuit;
FIG. 2 is a schematic diagram of the adaptive fast response circuit according to the present invention;
FIG. 3 is a schematic diagram of a circuit configuration of the peak detection circuit;
FIG. 4 is a schematic diagram of a slope detection module;
fig. 5 is a schematic structural view of the adjusting module and the ripple cancellation module.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments only. The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention.
In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present invention.
As shown in fig. 2, a basic circuit structure of the adaptive quick response circuit of the present invention is illustrated. The load negative terminal voltage detection circuit mainly comprises a peak detection circuit, wherein the peak detection circuit detects the peak voltage of a load negative terminal VD, obtains a sampling signal representing the peak voltage, and obtains a reference signal Vref of the load negative terminal according to the sampling signal of the peak voltage; the sampling signal of the peak voltage represents the peak voltage of the current period or represents the weighted average value of the peak voltage of the previous m times, m is a natural number, and under the condition that weights are the same, the weighted average value is the common average value.
The voltage sampling signal Vs representing the voltage of the negative end of the load is obtained by sampling the voltage of the negative end of the load, and is compared with the reference signal Vref of the negative end of the load (realized by the first comparator comp 1), and when the voltage sampling signal reaches the reference signal Vref of the negative end of the load, quick response is performed. I.e. when the voltage sampling signal Vs characterizing the negative load voltage reaches the reference signal Vref of the peak voltage, the regulation voltage of the ripple cancellation module is regulated to regulate the negative load voltage. The output end of the first comparator comp1 outputs a quick response control signal Vc, and the adjusting module receives the quick response control signal Vc and outputs an adjusting signal Vr to the ripple eliminating module.
As further optimizing the reference signal, the reference signal Vref of the negative end of the load is obtained by superposition bias voltage or/and proportional operation of the sampling signal of the peak voltage.
As shown in fig. 3, a circuit configuration of the peak detection circuit of the present invention is illustrated. The peak detection circuit comprises a first operational amplifier U01, a first switch Q1 and a first capacitor C1, wherein a first input end of the first operational amplifier U01 is connected with a load negative end (can be directly connected or can be connected through a sampling circuit), an output end of the first operational amplifier U01 is connected with a control end of the first switch Q1, the first switch Q1 is connected with the first capacitor C1 in series, a public end of the first switch Q1 and the first capacitor C1 is connected with a second input end of the first operational amplifier U01, and voltage on the first capacitor C1 serves as a sampling signal Vp of peak voltage. In order to facilitate the updating of the sampling signal Vp of the peak voltage, especially when the next peak value is lower than the current peak value, the first capacitor needs to be discharged before that, and therefore, the second switch Q2 is connected in parallel to the first capacitor C1, and the first capacitor C1 is discharged by controlling the conduction of the second switch Q2. During operation, the common end of the first switch Q1 and the first capacitor C1 will follow the voltage of VD and charge the first capacitor C1, so that the voltage of the first capacitor C1 can represent the peak voltage of VD, if the next peak voltage is lower than the current peak voltage, the first capacitor C1 needs to be discharged, and the voltage on the first capacitor C1 is updated by conducting the second switch.
The peak voltage sample signal Vp may be directly used as the reference signal Vref, but in order to better accommodate various applications, it is generally necessary to superimpose the offset voltage Vos on the peak voltage sample signal Vp, or perform proportional adjustment, or superimpose the offset voltage Vos (implemented by an adder) and then perform proportional adjustment (implemented by the proportional adjustment module k), which is illustrated in fig. 3, and generate the reference signal Vref accordingly.
For peak detection, the following may also be implemented: the peak detection circuit continuously samples the negative end of the load, compares a signal representing the voltage of the negative end of the load with a first variable reference, adds a step length to the first variable reference at intervals when the signal representing the voltage of the negative end of the load is larger than or equal to the first variable reference, and takes the value of the first variable reference at the moment as a sampling signal representing the peak voltage until the signal representing the voltage of the negative end of the load is smaller than the second variable reference, wherein the step length can be a fixed value or a variable value; the second variable reference varies with the first variable reference and is lower than the first variable reference.
As shown in fig. 4, a principle structure of the slope detection module is illustrated. The peak detection circuit comprises a peak time detection circuit and a sample hold circuit, wherein the slope detection module is used as the peak time detection circuit, and the slope detection module dv/dt is used for detecting the change rate of the voltage of the negative end of the load and comparing the change rate with a change rate threshold V REF1 Comparing to obtain a signal representing the peak time of the negative end voltage of the load, and outputting the signal by a second comparator comp 2; the sample hold circuit samples and holds the negative end of the load according to the signal representing the peak time of the voltage of the negative end of the load, and various sample hold modes can be adopted, namely an analog circuit and a digital circuit. The peak timing detection circuit and the sample-and-hold circuit may be realized by one circuit having both functions. In addition to the implementation circuit shown in fig. 4, the slope detection module may be further configured to detect a rate of change of the negative load voltage, and determine that the detection time of the nth time is the peak time when the detected negative load voltage is detected if the n-1 th detected rate of change of the voltage is positive and the n-1 th detected rate of change of the voltage is negativeIs a sampled signal of peak voltage.
As shown in fig. 5, the circuit structures of the adjustment module and the ripple cancellation module are illustrated. The reference regulating module comprises a current source I03 and a switch S1, and the switch S1 is connected with the output end of the first comparator comp 1. The adjusting module is connected with the ripple eliminating module, wherein the ripple eliminating module comprises an adjusting tube M01, a current generating circuit, a current source I01 and a third capacitor C3, the adjusting tube M01 in the embodiment adopts NMOS, a first end is a drain electrode, a second end is a source electrode, and a control end is a grid electrode. The negative terminal of the LED load is connected to the drain (i.e., first terminal) of the tuning tube M01, and the source (i.e., second terminal) of the tuning tube M01 is connected to ground. A current generating circuit is connected between the drain and the gate (i.e., the control terminal) of the regulator tube M01. The current source I01 and the third capacitor C3 are connected in parallel and connected between the gate of the regulator tube M01 and ground. The control end of the adjusting tube M01, i.e. one end of the third capacitor C3, is connected to the adjusting module, and is configured to receive the adjusting signal.
The time constant of the filter circuit formed by the third capacitor C3, the current generating circuit and the current source I01 is far greater than the power frequency period, so that the voltage on the first capacitor C01 is similar to the ripple-free direct current voltage, the current passing through the adjusting tube is similar to the ripple-free direct current, the current ripple passing through the LED load is reduced, the input current ripple is converted into the voltage ripple of the drain-source end of the adjusting tube through the input capacitor, and the direct current component of the voltage ripple of the drain-source end of the adjusting tube can be controlled by setting the value of the current source. The third capacitor C3 is a capacitive element of the ripple cancellation module in this implementation, and the reference adjustment signal output by the reference adjustment module pulls up the common terminal of the third capacitor C3 and the current generation circuit, that is, charges the third capacitor C3. Although the current generating circuit is implemented by a current source in the present embodiment, implementations other than a current source, for example, a resistor, etc., may be implemented, and this portion of the description is equally applicable to other embodiments.
Although the embodiments have been described and illustrated separately above, and with respect to a partially common technique, it will be apparent to those skilled in the art that alternate and integration may be made between embodiments, with reference to one embodiment not explicitly described, and reference may be made to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (11)
1. An adaptive fast response circuit comprising:
the peak detection circuit is used for detecting the peak voltage of the negative end of the load to obtain a sampling signal representing the peak voltage, and obtaining a reference signal of the negative end of the load according to the sampling signal of the peak voltage;
and when the voltage sampling signal reaches the reference signal of the negative end of the load, adjusting the adjusting voltage of the ripple eliminating module to adjust the voltage of the negative end of the load.
2. The adaptive quick response circuit according to claim 1, wherein: the sampling signal of the peak voltage represents the peak voltage of the current period or represents the weighted average value of the peak voltage of the previous m times, and m is a natural number.
3. The adaptive quick response circuit according to claim 2, wherein: and the reference signal of the negative end of the load is obtained by superposition of bias voltage or/and proportional operation of the sampling signal of the peak voltage.
4. An adaptive fast response circuit according to claim 1, 2 or 3, wherein: the peak detection circuit comprises a first operational amplifier, a first switch and a first capacitor, wherein a first input end of the first operational amplifier is connected with a load negative end, an output end of the first operational amplifier is connected with a control end of the first switch, the first switch is connected with the first capacitor in series, a common end of the first switch and the first capacitor is connected with a second input end of the first operational amplifier, and voltage on the first capacitor is used as a sampling signal of peak voltage.
5. The adaptive quick response circuit according to claim 4, wherein: the first capacitor is connected with the second switch in parallel, and the first capacitor is discharged by controlling the conduction of the second switch.
6. An adaptive fast response circuit according to claim 1, 2 or 3, wherein: the peak detection circuit comprises a peak time detection circuit and a sampling and holding circuit, wherein the peak time detection circuit detects the peak time of the negative load terminal, and the sampling and holding circuit samples and holds the negative load terminal according to the peak time to obtain a sampling signal of the peak voltage.
7. The adaptive quick response circuit according to claim 6, wherein: the peak time detection circuit comprises a slope detection module, wherein the slope detection module is used for detecting the change rate of the voltage of the negative end of the load, judging the peak time according to the change rate of the voltage, and obtaining a signal representing the peak time of the voltage of the negative end of the load; and the sample hold circuit samples and holds the negative end of the load according to the signal representing the peak time of the voltage of the negative end of the load.
8. An adaptive fast response circuit according to claim 1 or 2 or 3, wherein: the peak detection circuit continuously samples the negative end of the load, compares a signal representing the voltage of the negative end of the load with a first variable reference, adds a step length to the first variable reference at intervals when the signal representing the voltage of the negative end of the load is larger than or equal to the first variable reference until the signal representing the voltage of the negative end of the load is smaller than a second variable reference, and takes the value of the first variable reference at the moment as a sampling signal representing the peak voltage; the second variable reference varies with the first variable reference and is lower than the first variable reference.
9. The adaptive quick response circuit according to claim 1, wherein: the voltage sampling signal representing the voltage of the negative terminal of the load is compared with the reference signal representing the peak voltage through a first comparator, the output end of the first comparator outputs a quick response control signal, and the adjusting module receives the quick response control signal and outputs an adjusting signal to the ripple eliminating module.
10. A quick response method comprising the steps of:
detecting the peak voltage of the negative end of the load to obtain a sampling signal representing the peak voltage, and obtaining a reference signal of the negative end of the load according to the sampling signal of the peak voltage;
the method comprises the steps of obtaining a voltage sampling signal representing the voltage of a load negative terminal by sampling the voltage of the load negative terminal, comparing the voltage sampling signal with a reference signal of the load negative terminal, and adjusting the adjusting voltage of a ripple eliminating module to adjust the voltage of the load negative terminal when the voltage sampling signal reaches the reference signal of the load negative terminal;
the sampling signal of the peak voltage represents the peak voltage of the current period or represents the weighted average value of the peak voltage of the previous m times, and m is a natural number.
11. An LED driving circuit comprising: the adaptive quick response circuit and ripple cancellation module of any one of the preceding claims 1-9, wherein an output of the adaptive quick response circuit is connected to the ripple cancellation module, and wherein the ripple cancellation module is connected to a load.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621166013 | 2016-10-26 | ||
| CN2016211660137 | 2016-10-26 |
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| CN107426859A CN107426859A (en) | 2017-12-01 |
| CN107426859B true CN107426859B (en) | 2023-07-25 |
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| CN201720631678.9U Withdrawn - After Issue CN207589216U (en) | 2016-10-26 | 2017-06-02 | Adaptive fast response circuit 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 |
| CN201710407368.3A Active CN107094333B (en) | 2016-10-26 | 2017-06-02 | Self-adaptive quick response circuit, quick response method and LED drive circuit |
| CN201710407250.0A Active CN107426859B (en) | 2016-10-26 | 2017-06-02 | Self-adaptive quick response circuit, quick response method and LED driving circuit |
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| CN201720631678.9U Withdrawn - After Issue CN207589216U (en) | 2016-10-26 | 2017-06-02 | Adaptive fast response circuit 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 |
| CN201710407368.3A Active CN107094333B (en) | 2016-10-26 | 2017-06-02 | Self-adaptive quick response circuit, quick response method and LED drive circuit |
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| CN207589216U (en) * | 2016-10-26 | 2018-07-06 | 杰华特微电子（张家港）有限公司 | Adaptive fast response circuit and LED drive circuit |
| 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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| CN105634279A (en) * | 2016-03-25 | 2016-06-01 | 东南大学 | Method for improving load transient response of single-inductor multi-output power converter |
| CN207083253U (en) * | 2016-10-26 | 2018-03-09 | 杰华特微电子（张家港）有限公司 | A kind of adaptive fast response circuit and LED drive circuit |
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| TWI377466B (en) * | 2009-04-06 | 2012-11-21 | Iml Int | Constant current driving system with stable output current |
| CN204014192U (en) * | 2014-07-09 | 2014-12-10 | 无锡硅动力微电子股份有限公司 | Adaptive LED current ripples is eliminated circuit |
| TWI595735B (en) * | 2015-03-24 | 2017-08-11 | 立錡科技股份有限公司 | Current regulator circuit capable of reducing current ripple and method of reducing current ripple |
| 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 |
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- 2017-06-02 CN CN201720631678.9U patent/CN207589216U/en not_active Withdrawn - After Issue
- 2017-06-02 CN CN201720639585.0U patent/CN207083253U/en active Active
- 2017-06-02 CN CN201710407368.3A patent/CN107094333B/en active Active
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269550A (en) * | 2013-06-04 | 2013-08-28 | 上海晶丰明源半导体有限公司 | LED ((Light Emitting Diode) current ripple elimination driving circuit |
| CN103747599A (en) * | 2014-01-28 | 2014-04-23 | 杰华特微电子（杭州）有限公司 | Current stabilizing control circuit, corresponding circuit combination and current stabilizing control method |
| CN105375798A (en) * | 2015-11-25 | 2016-03-02 | 上海晶丰明源半导体有限公司 | Self-adaptive sampling circuit, primary side feedback constant voltage system and switching power supply system |
| CN105634279A (en) * | 2016-03-25 | 2016-06-01 | 东南大学 | Method for improving load transient response of single-inductor multi-output power converter |
| CN207083253U (en) * | 2016-10-26 | 2018-03-09 | 杰华特微电子（张家港）有限公司 | A kind of adaptive fast response circuit and LED drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107094333A (en) | 2017-08-25 |
| CN207589216U (en) | 2018-07-06 |
| CN207083253U (en) | 2018-03-09 |
| CN107094333B (en) | 2020-01-14 |
| CN107426859A (en) | 2017-12-01 |
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