CN220123109U - Self-adaptive current ripple suppression circuit, system and lighting product - Google Patents

Abstract

The application is suitable for the technical field of power electronics, and provides a self-adaptive current ripple suppression circuit, a self-adaptive current ripple suppression system and a lighting product. The current ripple suppression module in the self-adaptive current ripple suppression circuit is connected in series between the dimming power supply and the load, a first end of the signal acquisition module is used for being electrically connected with the dimming power supply, and a second end of the signal acquisition module is electrically connected with the current ripple suppression module. The signal acquisition module is used for acquiring a current signal output by the dimming power supply and outputting a voltage signal to the current ripple suppression module according to the current signal. When the voltage signal is smaller than or equal to a preset voltage signal, the current ripple suppression module performs ripple filtering on the current signal and transmits the current signal after ripple filtering to a load, and when the voltage signal is larger than the preset voltage signal, the current ripple suppression module transmits the current signal to the load. The application solves the problem of power efficiency reduction caused by the problem of light jitter when the lighting product is regulated to the low end by the silicon controlled rectifier dimmer.

Description

Self-adaptive current ripple suppression circuit, system and lighting product

Technical Field

The application belongs to the technical field of power electronics, and particularly relates to a self-adaptive current ripple suppression circuit, a self-adaptive current ripple suppression system and a lighting product.

Background

Currently, a dimmable lighting product, such as an LED (Light Emitting Diode) lighting product, is usually adjusted by matching a triac dimming power supply with a triac dimmer, but there is often ripple in the current output by the triac dimming power supply when the triac dimmer is adjusted to a low end (smaller phase angle) due to the interference of mains distortion, so that the lighting product shakes, and thus human eyes are uncomfortable. A current ripple suppression circuit is usually added to the output end of the scr dimming power supply to filter the ripple in the current, so as to improve the light emitting quality of the lighting product, but this may result in a decrease in power efficiency.

Disclosure of Invention

The embodiment of the utility model provides a self-adaptive current ripple suppression circuit, a self-adaptive current ripple suppression system and a lighting product, which can solve the problem of power efficiency reduction caused by the fact that the lighting product solves the problem of light jitter when a silicon controlled rectifier dimmer is regulated to a low end.

In a first aspect, an embodiment of the present utility model provides an adaptive current ripple suppression circuit, including a signal acquisition module and a current ripple suppression module, where the current ripple suppression module is connected in series between a dimming power supply and a load, a first end of the signal acquisition module is electrically connected to the dimming power supply, and a second end of the signal acquisition module is electrically connected to the current ripple suppression module;

The signal acquisition module is used for acquiring a current signal output by the dimming power supply and outputting a voltage signal to the current ripple suppression module according to the current signal; when the voltage signal is smaller than or equal to a preset voltage signal, the current ripple suppression module performs ripple filtering on the current signal and transmits the current signal subjected to ripple filtering to the load, and when the voltage signal is larger than the preset voltage signal, the current ripple suppression module transmits the current signal to the load.

In a possible implementation manner of the first aspect, the current ripple suppression module includes a switching unit and a current ripple suppression unit; the switching unit is electrically connected with the second end of the signal acquisition module and the current ripple suppression unit respectively, the switching unit and the current ripple suppression unit are both used for being electrically connected with the dimming power supply, and the current ripple suppression unit is also used for being electrically connected with the load;

the switch unit is used for receiving the voltage signal, when the voltage signal is smaller than or equal to the preset voltage signal, the switch unit is disconnected, the current ripple suppression unit performs ripple filtering on the current signal and transmits the current signal subjected to ripple filtering to the load, when the voltage signal is larger than the preset voltage signal, the switch unit is conducted and outputs a first level signal to the current ripple suppression unit, and the current ripple suppression unit transmits the current signal to the load according to the first level signal.

In a possible implementation manner of the first aspect, when the first end of the signal acquisition module is used for being electrically connected with the negative electrode of the dimming power supply, the switching unit includes a first resistor, a first switching tube and a second switching tube; the first resistor is respectively and electrically connected with a first conduction end of the second switching tube, the current ripple suppression unit and an anode of the dimming power supply, a second end of the first resistor is respectively and electrically connected with a control end of the second switching tube and the first conduction end of the first switching tube, the second conduction end of the second switching tube is electrically connected with the current ripple suppression unit, the second conduction end of the first switching tube is respectively and electrically connected with a first end of the signal acquisition module and a cathode of the dimming power supply, and the control end of the first switching tube is respectively and electrically connected with a second end of the signal acquisition module and the current ripple suppression unit.

In a possible implementation manner of the first aspect, when the first end of the signal acquisition module is used for being electrically connected with the positive pole of the dimming power supply, the switching unit includes a comparator and a third switching tube; the first input end of the comparator is respectively and electrically connected with the first end of the signal acquisition module and the positive electrode of the dimming power supply, the second input end of the comparator is respectively and electrically connected with the second end of the signal acquisition module, the first conducting end of the third switching tube and the current ripple suppression unit, the output end of the comparator is electrically connected with the control end of the third switching tube, and the second conducting end of the third switching tube is electrically connected with the current ripple suppression unit.

In a possible implementation manner of the first aspect, the current ripple suppression unit includes a second resistor, a third resistor, a first diode, a first voltage regulator tube, a second voltage regulator tube, a fourth switching tube, and a first capacitor; the cathode of the first diode is electrically connected with the first end of the third resistor and the cathode of the second voltage stabilizing tube respectively, the anode of the second voltage stabilizing tube is electrically connected with the switch unit, the first end of the first capacitor and the first end of the second resistor respectively, the second end of the second resistor is electrically connected with the control end of the fourth switch tube and the cathode of the first voltage stabilizing tube respectively, and the second conducting end of the fourth switch tube and the anode of the first voltage stabilizing tube are both used for being electrically connected with the anode of the load;

when the first end of the signal acquisition module is used for being electrically connected with the negative electrode of the dimming power supply, the anode of the first diode is respectively and electrically connected with the switch unit, the second end of the third resistor, the first conduction end of the fourth switch tube and the positive electrode of the dimming power supply, and the second end of the first capacitor is respectively and electrically connected with the negative electrode of the load, the switch unit and the second end of the signal acquisition module;

When the first end of the signal acquisition module is used for being electrically connected with the positive electrode of the dimming power supply, the anode of the first diode is electrically connected with the switch unit, the second end of the signal acquisition module, the second end of the third resistor and the first conduction end of the fourth switch tube respectively, and the second end of the first capacitor is electrically connected with the negative electrode of the dimming power supply and the negative electrode of the load respectively.

In a possible implementation manner of the first aspect, when the first end of the signal acquisition module is used for being electrically connected with the negative electrode of the dimming power supply, the current ripple suppression module includes a first current ripple suppression chip and a second capacitor;

the power supply pin of the first current ripple suppression chip is used for being electrically connected with the positive electrode of the dimming power supply, the control pin of the first current ripple suppression chip is electrically connected with the first end of the signal acquisition module and the negative electrode of the dimming power supply respectively, the load pin of the first current ripple suppression chip is used for being electrically connected with the positive electrode of the load, the capacitor pin of the first current ripple suppression chip is electrically connected with the first end of the second capacitor, and the grounding pin of the first current ripple suppression chip is electrically connected with the second end of the second capacitor, the negative electrode of the load and the second end of the signal acquisition module respectively.

In a possible implementation manner of the first aspect, when the first end of the signal acquisition module is used for being electrically connected with the positive electrode of the dimming power supply, the current ripple suppression module includes a second current ripple suppression chip and a third capacitor; the power supply pin of the second current ripple suppression chip is electrically connected with the positive electrode of the dimming power supply and the first end of the signal acquisition module respectively, the control pin of the second current ripple suppression chip is electrically connected with the second end of the signal acquisition module, the load pin of the second current ripple suppression chip is electrically connected with the positive electrode of the load, the capacitor pin of the second current ripple suppression chip is electrically connected with the first end of the third capacitor, and the second end of the third capacitor is electrically connected with the negative electrode of the dimming power supply and the negative electrode of the load respectively.

In a possible implementation manner of the first aspect, the signal acquisition module includes a sampling resistor, a first end of the sampling resistor is used for being electrically connected with the dimming power supply, and a second end of the sampling resistor is electrically connected with the current ripple suppression module.

In a second aspect, an embodiment of the present application provides an adaptive current ripple suppression system, including a dimming power supply and an adaptive current ripple suppression circuit according to any one of the first aspects, where the adaptive current ripple suppression circuit is connected in series between the dimming power supply and a load.

In a third aspect, embodiments of the present application provide a lighting product comprising a load and the adaptive current ripple suppression system of the second aspect, the adaptive current ripple suppression system being connected in series between a triac dimmer and the load.

Compared with the prior art, the embodiment of the application has the beneficial effects that:

the embodiment of the application provides a self-adaptive current ripple suppression circuit which comprises a signal acquisition module and a current ripple suppression module. The current ripple suppression module is connected in series between the dimming power supply and the load, the first end of the signal acquisition module is used for being electrically connected with the dimming power supply, and the second end of the signal acquisition module is electrically connected with the current ripple suppression module.

The signal acquisition module is used for acquiring a current signal output by the dimming power supply and outputting a voltage signal to the current ripple suppression module according to the current signal. When the voltage signal is smaller than or equal to a preset voltage signal, the current ripple suppression module performs ripple filtering on the current signal and transmits the current signal after ripple filtering to a load, and when the voltage signal is larger than the preset voltage signal, the current ripple suppression module transmits the current signal to the load.

When the voltage signal is smaller than or equal to a preset voltage signal, the corresponding silicon controlled rectifier dimmer is adjusted to the low end, the current ripple suppression module carries out ripple filtering on the current signal, and the current signal after the ripple filtering is transmitted to a load, so that the current signal flowing through the load is more stable, and the problem of optical jitter existing when the silicon controlled rectifier dimmer is adjusted to the low end is effectively solved.

When the voltage signal is larger than the preset voltage signal, the corresponding silicon controlled dimmer is adjusted to the middle-high end, the current ripple suppression module directly transmits the current signal output by the dimming power supply to the load, and the problem that the power supply efficiency is reduced because the current ripple suppression module is always in the current ripple suppression mode when the silicon controlled dimmer is adjusted to the middle-high end is effectively solved.

The current ripple suppression module determines whether to carry out ripple filtering on the current signal according to the collected current signal, so that the problem of light jitter existing at the low end when the silicon controlled rectifier dimmer is adjusted to the middle-high end is solved, and the problem of power efficiency reduction caused by the fact that the current ripple suppression module is in a current ripple suppression mode when the silicon controlled rectifier dimmer is adjusted to the middle-high end is also solved.

In summary, the self-adaptive current ripple suppression circuit provided by the embodiment of the application solves the problem of reduced power efficiency caused by the fact that the lighting product solves the problem of light jitter when the silicon controlled rectifier is adjusted to the low end.

It will be appreciated that the advantages of the second to third aspects may be found in the relevant description of the first aspect, and are not described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic block diagram of an adaptive current ripple suppression circuit according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating the operation of an adaptive current ripple suppression circuit according to an embodiment of the present application;

FIG. 3 is a schematic block diagram of an adaptive current ripple suppression circuit provided in another embodiment of the present application;

FIG. 4 is a schematic diagram of a circuit connection of an adaptive current ripple suppression circuit according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a circuit connection of an adaptive current ripple suppression circuit according to another embodiment of the present application;

FIG. 6 is a schematic diagram of a circuit connection of an adaptive current ripple suppression circuit according to another embodiment of the present application;

FIG. 7 is a schematic diagram of a circuit connection of an adaptive current ripple suppression circuit according to another embodiment of the present application;

FIG. 8 is a functional block diagram of an adaptive current ripple suppression system provided in accordance with one embodiment of the present application;

fig. 9 is a functional block diagram of a lighting product provided by an embodiment of the present application.

In the figure: 10. an adaptive current ripple suppression circuit; 101. a signal acquisition module; 102. a current ripple suppression module; 1021. a switching unit; 1022. a current ripple suppressing unit; 20. a dimming power supply; 30. a load; 40. a silicon controlled dimmer; 80. an adaptive current ripple suppression system; 90. a lighting product.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As used in the present description and the appended claims, the term "if" may be interpreted in context as "when …" or "upon" or "in response to a determination" or "in response to detection. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Currently, a dimmable lighting product generally comprises a silicon controlled dimming power supply and an LED load, the light output effect of the dimming power supply is usually adjusted by matching the silicon controlled dimming power supply with a silicon controlled dimmer, the silicon controlled dimmer is connected in series between an AC (Alternating Current ) power supply and the lighting product, and the voltage of the AC power supply is controlled through phase-cut chopper to achieve the light output effect of the lighting product, wherein the AC power supply is an alternating current regulated power supply device or is directly supplied by a municipal power grid. The thyristor dimming power supply is an AC-DC (Alternating Current-Direct Current) constant Current power supply compatible with a thyristor dimmer, and is used for providing stable Current for an LED load. However, the lighting product can often cause light jitter of the lighting product due to ripple in the current output by the triac dimmer power supply when the triac dimmer adjusts to a low end (smaller phase angle) due to mains distortion interference, thereby causing discomfort to human eyes. In order to solve the above-mentioned problems, a current ripple suppression circuit is usually added at the output end of the scr dimming power supply to filter the ripple in the current, so as to improve the light emitting quality of the lighting product, but when the scr dimmer is adjusted to a middle-high end (a larger phase angle), the current ripple suppression circuit is still in the current ripple suppression mode, resulting in a decrease in the power efficiency.

The magnitude of the conduction phase angle can be changed by adjusting the chopping phase of the silicon controlled rectifier dimmer, so as to realize dimming. When the silicon controlled rectifier dimmer is adjusted to a smaller phase angle, the silicon controlled rectifier dimmer is adjusted to a lower end, and the current output by the silicon controlled rectifier dimming power supply is smaller. When the silicon controlled rectifier dimmer is adjusted to a larger phase angle, the silicon controlled rectifier dimmer can be adjusted to a middle-high end, and the current output by the silicon controlled rectifier dimming power supply is larger.

In view of the foregoing, an embodiment of the present application provides an adaptive current ripple suppression circuit 10, as shown in fig. 1, where the adaptive current ripple suppression circuit 10 includes a signal acquisition module 101 and a current ripple suppression module 102, the current ripple suppression module 102 is connected in series between a dimming power supply 20 and a load 30, a first end of the signal acquisition module 101 is electrically connected to the dimming power supply 20, and a second end of the signal acquisition module 101 is electrically connected to the current ripple suppression module 102.

Specifically, as shown in fig. 2, the signal acquisition module 101 is configured to acquire a current signal output by the dimming power supply 20, and output a voltage signal to the current ripple suppression module 102 according to the current signal. When the voltage signal is less than or equal to the preset voltage signal, the current ripple suppression module 102 performs ripple filtering on the current signal, and transmits the current signal after the ripple filtering to the load 30, and when the voltage signal is greater than the preset voltage signal, the current ripple suppression module 102 transmits the current signal to the load 30.

As shown in fig. 4, 5, 6 and 7, the signal acquisition module 101 includes a sampling resistor RCS. The first end of the sampling resistor RCS is electrically connected to the dimming power supply 20, and the second end of the sampling resistor RCS is electrically connected to the current ripple suppression module 102. The sampling resistor RCS is configured to collect a current signal output by the dimming power supply 20, and output a voltage signal to the current ripple suppression module 102 according to the current signal, where a resistance value of the sampling resistor RCS is R. Assuming that the voltage signal is denoted by Vcs, vcs=iout.t·r, where iout.t denotes a current signal output when the dimming power supply 20 matches the triac dimmer, and R denotes a resistance value of the sampling resistor RCS. If the preset voltage signal is represented by Vref, vref=iout.max·a·r, where iout.max represents the maximum current signal output when the dimming power supply 20 is not matched with the triac dimmer, a represents the angle coefficient corresponding to the triac dimmer when the triac dimmer is adjusted to the low end, the value range is 0% to 100%, and R represents the resistance value of the sampling resistor RCS.

Therefore, when the voltage signal Vcs is smaller than or equal to the preset voltage signal Vref, the corresponding scr dimmer adjusts to the low end, and the current ripple suppression module 102 performs ripple filtering on the current signal iout.t, and transmits the current signal after ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the scr dimmer adjusts to the low end is effectively solved.

When the voltage signal Vcs is greater than the preset voltage signal Vref, the corresponding scr dimmer adjusts to the middle-high end, and the current ripple suppression module 102 directly transmits the current signal iout. T output by the dimming power supply 20 to the load 30, so that the problem that the power efficiency is reduced when the current ripple suppression module 102 is always in the current ripple suppression mode when the scr dimmer adjusts to the middle-high end is effectively solved.

The current ripple suppression module 102 determines whether to perform ripple filtering on the current signal iout according to the collected current signal iout.t, so that the problem of light jitter existing in the process of adjusting the silicon controlled rectifier dimmer to the low end is solved, and the problem of power efficiency reduction caused by the fact that the current ripple suppression module 102 is in a current ripple suppression mode when the silicon controlled rectifier dimmer is adjusted to the medium-high end is also solved.

In summary, the self-adaptive current ripple suppression circuit 10 provided in the embodiment of the present application solves the problem of reduced power efficiency caused by the problem of light jitter when the triac dimmer is adjusted to a low end.

Illustratively, the load 30 is an LED load.

Illustratively, the dimming power supply 20 is an AC-DC constant current power supply compatible with a thyristor dimmer, which may be a linear, non-isolated or isolated architecture constant current power supply.

As shown in fig. 3, the current ripple suppression module 102 includes a switching unit 1021 and a current ripple suppression unit 1022, the current ripple suppression unit 1022 is connected in series between the dimming power supply 20 and the load 30, the switching unit 1021 is electrically connected to the second end of the signal acquisition module 101 and the current ripple suppression unit 1022, and the switching unit 1021 is further electrically connected to the dimming power supply 20.

Specifically, the switch unit 1021 is configured to receive the voltage signal Vcs, when the voltage signal Vcs is less than or equal to the preset voltage signal Vref, the corresponding scr dimmer is adjusted to the low end, the switch unit 1021 is turned off, the current ripple suppression unit 1022 performs ripple filtering on the current signal iout.t, and transmits the current signal after the ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the scr dimmer is adjusted to the low end is effectively solved.

When the voltage signal Vcs is greater than the preset voltage signal Vref, the corresponding scr dimmer is adjusted to the medium-high end, the switching unit 1021 is turned on, and a first level signal is output to the current ripple suppression unit 1022, and the current ripple suppression unit 1022 directly transmits the current signal iout to the load 30 according to the first level signal, so that the problem that the power efficiency is reduced when the current ripple suppression unit 1022 is always in the current ripple suppression mode during the adjustment of the scr dimmer to the medium-high end is effectively solved. The first level signal is a high level signal.

The switch unit 1021 is turned off or on according to the collected current signal iout.t, so that the current ripple suppression unit 1022 performs ripple filtering on the current signal iout.t, and transmits the current signal iout.t after the ripple filtering to the load 30 or transmits the current signal iout.t to the load 30, that is, the current ripple suppression module 102 can work adaptively, which solves the problem of light jitter existing when the thyristor dimmer is adjusted to the low end and the problem of reduced power efficiency caused by the current ripple suppression unit 1022 being in the current ripple suppression mode when the thyristor dimmer is adjusted to the medium-high end.

As shown in fig. 4, when the first terminal of the signal acquisition module 101 is used to be electrically connected to the negative electrode of the dimming power supply 20, that is, the first terminal of the sampling resistor RCS is used to be electrically connected to the negative electrode of the dimming power supply 20, the switching unit 1021 includes a first resistor R1, a first switching tube Q1, and a second switching tube Q2. The first resistor R1 is electrically connected to the first conducting end of the second switching tube Q2, the current ripple suppression unit 1022 and the positive electrode of the dimming power supply 20, the second end of the first resistor R1 is electrically connected to the control end of the second switching tube Q2 and the first conducting end of the first switching tube Q1, the second conducting end of the second switching tube Q2 is electrically connected to the current ripple suppression unit 1022, the second conducting end of the first switching tube Q1 is electrically connected to the first end of the signal acquisition module 101 and the negative electrode of the dimming power supply 20, and the control end of the first switching tube Q1 is electrically connected to the second end of the signal acquisition module 101 and the current ripple suppression unit 1022. As can be seen from fig. 4, the second conducting end of the first switching tube Q1 is electrically connected to the first end of the sampling resistor RCS and the negative electrode of the dimming power supply 20, respectively. The control terminal of the first switching tube Q1 is electrically connected to the second terminal of the sampling resistor RCS and the current ripple suppression unit 1022, respectively.

Specifically, when the current signal iout.t output by the dimming power supply 20 is smaller, the voltage signal Vcs is smaller and smaller than the preset voltage signal Vref, and the corresponding scr dimmer adjusts to the low end. Since the voltage signal Vcs is smaller, the voltage difference between the voltage at the control terminal of the first switching tube Q1 and the voltage at the second conducting terminal of the first switching tube Q1 is smaller, and the on condition of the first switching tube Q1 is not satisfied, so that the first switching tube Q1 is turned off. The voltage at the control terminal of the second switching tube Q2 is pulled up by the first resistor R1, and the on condition of the second switching tube Q2 is not satisfied, so that the second switching tube Q2 is turned off, i.e., the switching unit 1021 is turned off. When the switch unit 1021 is in the off state, the current ripple suppression unit 1022 performs ripple filtering on the current signal iout.t, and transmits the current signal after the ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the thyristor dimmer is adjusted to the low end is effectively solved.

When the current signal iout.t output by the dimming power supply 20 is larger, the voltage signal Vcs is also larger and is larger than the preset voltage signal Vref, and the corresponding scr dimmer adjusts to the medium-high end. Because the voltage signal Vcs is larger, the voltage difference between the voltage at the control end of the first switching tube Q1 and the voltage at the second conducting end of the first switching tube Q1 is larger, and the conducting condition of the first switching tube Q1 is satisfied, so that the first switching tube Q1 is conducted. After the first switching tube Q1 is turned on, the voltage at the control end of the second switching tube Q2 is pulled down to meet the conduction condition of the second switching tube Q2, so that the second switching tube Q2 is turned on, that is, the switching unit 1021 is turned on, and outputs a first level signal to the current ripple suppression unit 1022, where the first level signal is a high level signal. The current ripple suppression unit 1022 directly transmits the current signal iout.t to the load 30 according to the first level signal, so that the problem that the power efficiency is reduced when the current ripple suppression unit 1022 is always in the current ripple suppression mode when the thyristor dimmer is adjusted to the medium-high end is effectively solved.

The first switching tube Q1 is an NMOS (N-Metal-Oxide-Semiconductor) tube, the control end of the first switching tube Q1 is a gate of the NMOS tube, the first conducting end of the first switching tube Q1 is a drain of the NMOS tube, and the second conducting end of the first switching tube Q1 is a source of the NMOS tube. The second switching tube Q2 is a PMOS (positive channel Metal Oxide Semiconductor, P-channel metal oxide semiconductor) tube, the control end of the second switching tube Q2 is the grid electrode of the PMOS tube, the first conduction end of the second switching tube Q2 is the drain electrode of the PMOS tube, and the second conduction end of the second switching tube Q2 is the source electrode of the PMOS tube.

As shown in fig. 4, the current ripple suppressing unit 1022 includes a second resistor R2, a third resistor R3, a first diode D1, a first regulator tube ZD1, a second regulator tube ZD2, a fourth switching tube Q4, and a first capacitor C1. The cathode of the first diode D1 is electrically connected to the first end of the third resistor R3 and the cathode of the second voltage stabilizing tube ZD2, the anode of the second voltage stabilizing tube ZD2 is electrically connected to the switch unit 1021, the first end of the first capacitor C1 and the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected to the control end of the fourth switch tube Q4 and the cathode of the first voltage stabilizing tube ZD1, and the second conducting end of the fourth switch tube Q4 and the anode of the first voltage stabilizing tube ZD1 are both electrically connected to the anode of the load 30. As can be seen from fig. 4, the anode of the second voltage stabilizing tube ZD2 is electrically connected to the second conducting end of the second switching tube Q2, the first end of the first capacitor C1 and the first end of the second resistor R2, respectively.

When the first end of the signal collecting module 101 is electrically connected to the negative electrode of the dimming power supply 20, that is, the first end of the sampling resistor RCS is electrically connected to the negative electrode of the dimming power supply 20, as shown in fig. 4, the anode of the first diode D1 is electrically connected to the switch unit 1021, the second end of the third resistor R3, the first conducting end of the fourth switch tube Q4, and the positive electrode of the dimming power supply 20, and the second end of the first capacitor C1 is electrically connected to the negative electrode of the load 30, the switch unit 1021, and the second end of the signal collecting module 101. As can be seen from fig. 4, the anode of the first diode D1 is electrically connected to the first end of the first resistor R1, the first conducting end of the second switching tube Q2, the second end of the third resistor R3, the first conducting end of the fourth switching tube Q4, and the anode of the dimming power supply 20, respectively. The second terminal of the first capacitor C1 is electrically connected to the negative electrode of the load 30, the control terminal of the first switching tube Q1, and the second terminal of the sampling resistor RCS, respectively.

Specifically, when the switch unit 1021 is turned off, the current ripple suppression unit 1022 performs ripple filtering on the current signal iout.t, and transmits the current signal after the ripple filtering to the load 30, and the specific working principle is as follows: the voltage output by the dimming power supply 20 is in a saturated conduction state after passing through the first diode D1 and the second voltage stabilizing tube ZD2, and the ripple filtering of the current signal iout.t is realized by utilizing the characteristic that the output current of the fourth switching tube Q4 in the saturation region is constant current, and the current signal after the ripple filtering is transmitted to the load 30. The first capacitor C1 is configured to charge or discharge according to the voltage output by the dimming power supply 20, so that the output voltage of the dimming power supply 20 is maintained stable, and meanwhile, a part of ripple is filtered by the first capacitor C1, so that the current ripple suppression unit 1022 can achieve a better ripple filtering effect. The second resistor R2 acts as a current limiter. The third resistor R3 is used for providing a discharging loop when the first capacitor C1 is discharged. The first regulator ZD1 is used for protecting the fourth switching tube Q4 from breakdown. The second voltage stabilizing tube ZD2 has the function of adjusting the current ripple suppression degree, the higher the voltage of the voltage stabilizing tube is, the deeper the ripple suppression is, the better the implementation effect is, but the larger the loss generated by the fourth switching tube Q4 is, and the lower the power efficiency is, so that the type of the second voltage stabilizing tube ZD2 can be determined according to the actual situation.

When the switch unit 1021 is turned on, the current ripple suppression unit 1022 directly transmits the current signal iout to the load 30 according to the first level signal, and the specific working principle is as follows: after the switch unit 1021 is turned on, a first level signal is output to the current ripple suppression unit 1022, that is, the first level signal is output to the junction of the second voltage stabilizing tube ZD2, the second resistor R2 and the first capacitor C1, and the first level signal is a high level signal, so that the fourth switch tube Q4 is completely turned on, and further, the current signal iout.t output by the dimming power supply 20 is directly transmitted to the load 30, thereby effectively solving the problem that the power efficiency is reduced when the current ripple suppression unit 1022 is always in the current ripple suppression mode when the thyristor dimmer is adjusted to the middle-high end.

The first capacitor C1 is an electrolytic capacitor, and the first end of the first capacitor C1 is an anode of the electrolytic capacitor, and the second end of the first capacitor C1 is a cathode of the electrolytic capacitor.

The fourth switching tube Q4 is an NMOS tube, the control end of the fourth switching tube Q4 is a gate of the NMOS tube, the first conducting end of the fourth switching tube Q4 is a drain of the NMOS tube, and the second conducting end of the fourth switching tube Q4 is a source of the NMOS tube.

As shown in fig. 5, when the first terminal of the signal acquisition module 101 is used to be electrically connected to the positive electrode of the dimming power supply 20, that is, the first terminal of the sampling resistor RCS is used to be electrically connected to the positive electrode of the dimming power supply 20, the switching unit 1021 includes a comparator COM and a third switching tube Q3. A first input end of the comparator COM is electrically connected to the first end of the signal acquisition module 101 and the positive electrode of the dimming power supply 20, a second input end of the comparator COM is electrically connected to the second end of the signal acquisition module 101, the first conducting end of the third switching tube Q3 and the current ripple suppression unit 1022, an output end of the comparator COM is electrically connected to the control end of the third switching tube Q3, and the second conducting end of the third switching tube Q3 is electrically connected to the current ripple suppression unit 1022. As can be seen from fig. 5, the first input terminal of the comparator COM is electrically connected to the first terminal of the sampling resistor RCS and the positive electrode of the dimming power supply 20, respectively. The second input end of the comparator COM is electrically connected to the second end of the sampling resistor RCS, the first conducting end of the third switching tube Q3, the anode of the first diode D1, the second end of the third resistor R3 and the first conducting end of the fourth switching tube Q4, respectively. The second conducting end of the third switching tube Q3 is electrically connected to the anode of the second voltage stabilizing tube ZD2, the first end of the first capacitor C1 and the first end of the second resistor R2, respectively.

As shown in fig. 5, when the first terminal of the signal acquisition module 101 is used to be electrically connected to the positive electrode of the dimming power supply 20, that is, the first terminal of the sampling resistor RCS is used to be electrically connected to the positive electrode of the dimming power supply 20, the second terminal of the first capacitor C1 in the current ripple suppression unit 1022 is electrically connected to the negative electrode of the dimming power supply 20 and the negative electrode of the load 30, respectively.

Specifically, when the current signal iout.t output by the dimming power supply 20 is smaller, the voltage signal Vcs is smaller and smaller than the preset voltage signal Vref, and the corresponding scr dimmer adjusts to the low end. Because the voltage signal Vcs is smaller, the voltage difference at the two input ends of the comparator COM is smaller, the on condition of the comparator COM is not satisfied, the comparator COM is turned off, and then the third switching tube Q3 is turned off, namely the switching unit 1021 is turned off, the characteristic that the output current of the fourth switching tube Q4 in the saturation region is constant current is utilized to filter the ripple of the current signal iout.t, and the current signal after the ripple filtering is transmitted to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the thyristor dimmer is regulated to the low end is effectively solved.

When the current signal iout.t output by the dimming power supply 20 is larger, the voltage signal Vcs is also larger and is larger than the preset voltage signal Vref, and the corresponding scr dimmer adjusts to the medium-high end. Since the voltage signal Vcs is larger, the voltage difference at the two input ends of the comparator COM is larger, the conduction condition of the comparator COM is satisfied, the comparator COM is turned on, the voltage at the control end of the third switching tube Q3 is pulled up, and the conduction condition of the third switching tube Q3 is satisfied, so that the third switching tube Q3 is turned on, that is, the switching unit 1021 is turned on, and the first level signal is output to the current ripple suppression unit 1022, and the first level signal is a high level signal. The fourth switching tube Q4 is fully turned on under the action of the first level signal, and directly transmits the current signal iout.t output by the dimming power supply 20 to the load 30, so that the problem that the power efficiency is reduced when the current ripple suppression unit 1022 is always in the current ripple suppression mode when the silicon controlled rectifier dimmer is adjusted to the middle-high end is effectively solved.

The comparator COM is illustratively a comparator with a reference.

The third switching tube Q3 is an NMOS tube, the control end of the third switching tube Q3 is a gate of the NMOS tube, the first conducting end of the third switching tube Q3 is a drain of the NMOS tube, and the second conducting end of the third switching tube Q3 is a source of the NMOS tube.

As shown in fig. 6, when the first terminal of the signal acquisition module 101 is used to be electrically connected to the negative electrode of the dimming power supply 20, that is, the first terminal of the sampling resistor RCS is used to be electrically connected to the negative electrode of the dimming power supply 20, the current ripple suppression module 102 includes a first current ripple suppression chip U1 and a second capacitor C2.

The power supply pin VIN of the first current ripple suppression chip U1 is electrically connected to the positive electrode of the dimming power supply 20, the control pin R of the first current ripple suppression chip U1 is electrically connected to the first end of the signal acquisition module 101 and the negative electrode of the dimming power supply 20, the load pin led+ of the first current ripple suppression chip U1 is electrically connected to the positive electrode of the load 30, the capacitor pin c+ of the first current ripple suppression chip U1 is electrically connected to the first end of the second capacitor C2, and the ground pin GND of the first current ripple suppression chip U1 is electrically connected to the second end of the second capacitor C2, the negative electrode of the load 30 and the second end of the signal acquisition module 101. As can be seen from fig. 6, the control pin R of the first current ripple suppression chip U1 is electrically connected to the first end of the sampling resistor RCS and the negative electrode of the dimming power supply 20, respectively. The ground pin GND of the first current ripple-reduction chip U1 is electrically connected to the second terminal of the second capacitor C2, the negative electrode of the load 30, and the second terminal of the sampling resistor RCS, respectively. The second capacitor C2 is used for maintaining the output voltage of the dimming power supply 20 stable, filtering out a part of ripple waves, and ensuring that the first current ripple suppression chip U1 can achieve a better ripple wave filtering effect. It should be noted that, the sampling resistor RCS can flexibly set the preset voltage signal Vref according to an actual application scenario.

Specifically, when the voltage signal Vcs is less than or equal to the preset voltage signal Vref, the corresponding scr dimmer adjusts to the low end, the first current ripple suppression chip U1 performs ripple filtering on the current signal iout.t, and transmits the current signal after ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the scr dimmer adjusts to the low end is effectively solved.

When the voltage signal Vcs is greater than the preset voltage signal Vref, the corresponding scr dimmer adjusts to the middle-high end, and the first current ripple suppression chip U1 directly transmits the current signal iout.t output by the dimming power supply 20 to the load 30, so that the problem that the power efficiency is reduced when the first current ripple suppression chip U1 is always in the current ripple suppression mode during the adjustment of the scr dimmer to the middle-high end is effectively solved.

The first current ripple suppression chip U1 is designed by a semiconductor field effect transistor, and may integrate protection functions such as overvoltage protection (OVP, over Voltage Protection), overcurrent protection (OCP, over current protection), and Over-temperature protection (OTP, over-Temperature Protection) according to practical requirements, so that the design is more convenient and stable.

The second capacitor C2 is an electrolytic capacitor, and the first end of the second capacitor C2 is an anode of the electrolytic capacitor, and the second end of the second capacitor C2 is a cathode of the electrolytic capacitor.

As shown in fig. 7, when the first terminal of the signal acquisition module 101 is used to be electrically connected to the positive electrode of the dimming power supply 20, that is, the first terminal of the sampling resistor RCS is used to be electrically connected to the positive electrode of the dimming power supply 20, the current ripple suppression module 102 includes a second current ripple suppression chip U2 and a third capacitor C3. The power supply pin VIN of the second current ripple suppression chip U2 is electrically connected to the positive electrode of the dimming power supply 20 and the first end of the signal acquisition module 101, the control pin R of the second current ripple suppression chip U2 is electrically connected to the second end of the signal acquisition module 101, the load pin led+ of the second current ripple suppression chip U2 is electrically connected to the positive electrode of the load 30, the capacitor pin c+ of the second current ripple suppression chip U2 is electrically connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is electrically connected to the negative electrode of the dimming power supply 20 and the negative electrode of the load 30, respectively. The third capacitor C3 is used for maintaining the output voltage of the dimming power supply 20 stable, filtering out a part of ripple waves, and ensuring that the second current ripple suppression chip U2 can achieve a better ripple wave filtering effect. It should be noted that, the sampling resistor RCS can flexibly set the preset voltage signal Vref according to an actual application scenario.

Specifically, when the voltage signal Vcs is less than or equal to the preset voltage signal Vref, the corresponding scr dimmer adjusts to the low end, the second current ripple suppression chip U2 performs ripple filtering on the current signal iout.t, and transmits the current signal after ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the scr dimmer adjusts to the low end is effectively solved.

When the voltage signal Vcs is greater than the preset voltage signal Vref, the corresponding scr dimmer adjusts to the middle-high end, and the second current ripple suppression chip U2 directly transmits the current signal iout.t output by the dimming power supply 20 to the load 30, so that the problem that the power efficiency is reduced when the second current ripple suppression chip U2 is always in the current ripple suppression mode during the adjustment of the scr dimmer to the middle-high end is effectively solved.

The second current ripple suppression chip U2 is designed by a semiconductor field effect transistor, and can integrate protection functions such as overvoltage protection, overcurrent protection, over-temperature protection and the like according to actual requirements, so that the design is more convenient and stable.

The third capacitor C3 is an electrolytic capacitor, and the first end of the third capacitor C3 is an anode of the electrolytic capacitor, and the second end of the third capacitor C3 is a cathode of the electrolytic capacitor.

As shown in fig. 8, the embodiment of the present application further provides an adaptive current ripple suppression system 80, which includes a dimming power supply 20 and an adaptive current ripple suppression circuit 10, wherein the adaptive current ripple suppression circuit 10 is connected in series between the dimming power supply 20 and the load 30. As can be seen from fig. 1, the current ripple suppression module in the self-adaptive current ripple suppression circuit 10 is connected in series between the dimming power supply 20 and the load 30, and a first end of the signal acquisition module in the self-adaptive current ripple suppression circuit 10 is electrically connected to the dimming power supply 20.

Specifically, the signal acquisition module in the self-adaptive current ripple suppression circuit 10 is configured to acquire a current signal output by the dimming power supply 20, and output a voltage signal to the current ripple suppression module in the self-adaptive current ripple suppression circuit 10 according to the current signal. When the voltage signal is smaller than or equal to the preset voltage signal, the corresponding silicon controlled rectifier dimmer is adjusted to the low end, the current ripple suppression module in the self-adaptive current ripple suppression circuit 10 performs ripple filtering on the current signal, and the current signal after ripple filtering is transmitted to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the silicon controlled rectifier dimmer is adjusted to the low end is effectively solved.

When the voltage signal is greater than the preset voltage signal, the corresponding silicon controlled dimmer is adjusted to the middle-high end, the current ripple suppression module in the adaptive current ripple suppression circuit 10 directly transmits the current signal output by the dimming power supply 20 to the load 30, and the problem that the power supply efficiency is reduced when the adaptive current ripple suppression circuit 10 is always in the current ripple suppression mode when the silicon controlled dimmer is adjusted to the middle-high end is effectively solved.

Therefore, the adaptive current ripple suppression system 80 provided by the embodiment of the application solves the problem of power efficiency reduction caused by the problem of light jitter when the lighting product is adjusted to the low end by the silicon controlled rectifier.

Illustratively, the load 30 is an LED load.

As shown in fig. 9, an embodiment of the present application also provides a lighting product 90 including a load 30 and an adaptive current ripple suppression system 80. An adaptive current ripple suppression system 80 is connected in series between the triac dimmer 40 and the load 30. As can be seen from fig. 8, the dimming power supply in the adaptive current ripple suppression system 80 is electrically connected to the triac dimmer 40, and the adaptive current ripple suppression circuit in the adaptive current ripple suppression system 80 is electrically connected to the load 30.

Specifically, the adaptive current ripple suppression circuit in the adaptive current ripple suppression system 80 collects the current signal output by the dimming power supply, generates a voltage signal according to the current signal, and when the voltage signal is smaller than or equal to a preset voltage signal, the corresponding silicon controlled rectifier dimmer 40 adjusts to the low end, the adaptive current ripple suppression circuit in the adaptive current ripple suppression system 80 performs ripple filtering on the current signal, and transmits the current signal after the ripple filtering to the load 30, so that the current signal flowing through the load 30 is more stable, and the problem of optical jitter existing when the silicon controlled rectifier dimmer 40 adjusts to the low end is effectively solved.

When the voltage signal is greater than the preset voltage signal, the corresponding scr dimmer 40 adjusts to the middle-high end, and the adaptive current ripple suppression circuit in the adaptive current ripple suppression system 80 directly transmits the current signal to the load 30, so that the problem of reduced power efficiency caused when the adaptive current ripple suppression system 80 is always in the current ripple suppression mode when the scr dimmer 40 adjusts to the middle-high end is effectively solved.

In summary, the lighting product 90 provided by the embodiment of the application also considers the power efficiency when solving the problem of light jitter existing when the triac dimmer 40 adjusts to the low side.

Illustratively, the load 30 is an LED load.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. The self-adaptive current ripple suppression circuit is characterized by comprising a signal acquisition module and a current ripple suppression module, wherein the current ripple suppression module is connected in series between a dimming power supply and a load, a first end of the signal acquisition module is used for being electrically connected with the dimming power supply, and a second end of the signal acquisition module is electrically connected with the current ripple suppression module;

the signal acquisition module is used for acquiring a current signal output by the dimming power supply and outputting a voltage signal to the current ripple suppression module according to the current signal; when the voltage signal is smaller than or equal to a preset voltage signal, the current ripple suppression module performs ripple filtering on the current signal and transmits the current signal subjected to ripple filtering to the load, and when the voltage signal is larger than the preset voltage signal, the current ripple suppression module transmits the current signal to the load.

2. The adaptive current ripple suppression circuit of claim 1, wherein the current ripple suppression module comprises a switching unit and a current ripple suppression unit, the current ripple suppression unit being connected in series between the dimming power supply and the load, the switching unit being electrically connected to the second end of the signal acquisition module and the current ripple suppression unit, respectively, the switching unit being further adapted to be electrically connected to the dimming power supply;

the switch unit is used for receiving the voltage signal, when the voltage signal is smaller than or equal to the preset voltage signal, the switch unit is disconnected, the current ripple suppression unit performs ripple filtering on the current signal and transmits the current signal subjected to ripple filtering to the load, when the voltage signal is larger than the preset voltage signal, the switch unit is conducted and outputs a first level signal to the current ripple suppression unit, and the current ripple suppression unit transmits the current signal to the load according to the first level signal.

3. The adaptive current ripple suppression circuit of claim 2, wherein the switching unit comprises a first resistor, a first switching tube, and a second switching tube when the first end of the signal acquisition module is configured to be electrically connected to the negative pole of the dimming power supply; the first resistor is respectively and electrically connected with a first conduction end of the second switching tube, the current ripple suppression unit and an anode of the dimming power supply, a second end of the first resistor is respectively and electrically connected with a control end of the second switching tube and the first conduction end of the first switching tube, the second conduction end of the second switching tube is electrically connected with the current ripple suppression unit, the second conduction end of the first switching tube is respectively and electrically connected with a first end of the signal acquisition module and a cathode of the dimming power supply, and the control end of the first switching tube is respectively and electrically connected with a second end of the signal acquisition module and the current ripple suppression unit.

4. The adaptive current ripple suppression circuit of claim 3, wherein the switching unit comprises a comparator and a third switching tube when the first end of the signal acquisition module is configured to be electrically connected to the positive pole of the dimming power supply; the first input end of the comparator is respectively and electrically connected with the first end of the signal acquisition module and the positive electrode of the dimming power supply, the second input end of the comparator is respectively and electrically connected with the second end of the signal acquisition module, the first conducting end of the third switching tube and the current ripple suppression unit, the output end of the comparator is electrically connected with the control end of the third switching tube, and the second conducting end of the third switching tube is electrically connected with the current ripple suppression unit.

5. The adaptive current ripple suppression circuit of claim 4, wherein the current ripple suppression unit comprises a second resistor, a third resistor, a first diode, a first voltage regulator tube, a second voltage regulator tube, a fourth switching tube, and a first capacitor; the cathode of the first diode is electrically connected with the first end of the third resistor and the cathode of the second voltage stabilizing tube respectively, the anode of the second voltage stabilizing tube is electrically connected with the switch unit, the first end of the first capacitor and the first end of the second resistor respectively, the second end of the second resistor is electrically connected with the control end of the fourth switch tube and the cathode of the first voltage stabilizing tube respectively, and the second conducting end of the fourth switch tube and the anode of the first voltage stabilizing tube are both used for being electrically connected with the anode of the load;

When the first end of the signal acquisition module is used for being electrically connected with the negative electrode of the dimming power supply, the anode of the first diode is respectively and electrically connected with the switch unit, the second end of the third resistor, the first conduction end of the fourth switch tube and the positive electrode of the dimming power supply, and the second end of the first capacitor is respectively and electrically connected with the negative electrode of the load, the switch unit and the second end of the signal acquisition module;

when the first end of the signal acquisition module is used for being electrically connected with the positive electrode of the dimming power supply, the anode of the first diode is electrically connected with the switch unit, the second end of the signal acquisition module, the second end of the third resistor and the first conduction end of the fourth switch tube respectively, and the second end of the first capacitor is electrically connected with the negative electrode of the dimming power supply and the negative electrode of the load respectively.

6. The adaptive current ripple suppression circuit of claim 1, wherein the current ripple suppression module comprises a first current ripple suppression chip and a second capacitor when the first end of the signal acquisition module is configured to be electrically connected to the negative pole of the dimming power supply;

The power supply pin of the first current ripple suppression chip is used for being electrically connected with the positive electrode of the dimming power supply, the control pin of the first current ripple suppression chip is electrically connected with the first end of the signal acquisition module and the negative electrode of the dimming power supply respectively, the load pin of the first current ripple suppression chip is used for being electrically connected with the positive electrode of the load, the capacitor pin of the first current ripple suppression chip is electrically connected with the first end of the second capacitor, and the grounding pin of the first current ripple suppression chip is electrically connected with the second end of the second capacitor, the negative electrode of the load and the second end of the signal acquisition module respectively.

7. The adaptive current ripple suppression circuit of claim 1, wherein the current ripple suppression module includes a second current ripple suppression chip and a third capacitor when the first end of the signal acquisition module is configured to be electrically connected to the positive pole of the dimming power supply; the power supply pin of the second current ripple suppression chip is electrically connected with the positive electrode of the dimming power supply and the first end of the signal acquisition module respectively, the control pin of the second current ripple suppression chip is electrically connected with the second end of the signal acquisition module, the load pin of the second current ripple suppression chip is electrically connected with the positive electrode of the load, the capacitor pin of the second current ripple suppression chip is electrically connected with the first end of the third capacitor, and the second end of the third capacitor is electrically connected with the negative electrode of the dimming power supply and the negative electrode of the load respectively.

8. The adaptive current ripple suppression circuit of any one of claims 1-7, wherein the signal collection module comprises a sampling resistor, a first end of the sampling resistor is configured to be electrically connected to the dimming power supply, and a second end of the sampling resistor is electrically connected to the current ripple suppression module.

9. An adaptive current ripple suppression system comprising a dimming power supply and the adaptive current ripple suppression circuit of any one of claims 1-8, the adaptive current ripple suppression circuit being connected in series between the dimming power supply and a load.

10. A lighting product comprising a load and the adaptive current ripple suppression system of claim 9, the adaptive current ripple suppression system being serially connected between a triac dimmer and the load.