CN108112149B - Power supply control device and lamp - Google Patents
Power supply control device and lamp Download PDFInfo
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- CN108112149B CN108112149B CN201711437414.0A CN201711437414A CN108112149B CN 108112149 B CN108112149 B CN 108112149B CN 201711437414 A CN201711437414 A CN 201711437414A CN 108112149 B CN108112149 B CN 108112149B
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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Abstract
The invention provides a power supply control device and a lamp, wherein the device comprises: the power supply circuit comprises a power storage circuit, a power storage supply circuit, a control circuit and a feedback circuit; the feedback circuit is used for outputting a first feedback voltage or a second feedback voltage to the control circuit; the control circuit is used for: according to the first feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light-emitting module and other circuits in the load can work normally; according to the second feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light emitting module does not emit light, but other parts or all circuits of the load remain in normal operation. The invention realizes the power supply of other circuits when the load does not emit light.
Description
Technical Field
The present invention relates to the field of lamps, and in particular, to a power supply control device and a lamp.
Background
A luminaire is understood to mean an appliance that emits light with a light source, which may have various dimensions, uses, light source types, etc. In the field of the lamp, in order to enrich the functions of the lamp, other circuits, such as a communication module, may be configured for the lamp.
In the prior art, the power supply control device includes a tank circuit and a tank power supply circuit, and when the light is emitted, the charging of the tank circuit is controlled by the tank power supply circuit, so that the output power supply meets the load requirement, and the power supply control device includes: so that the light emitting module in the load emits light normally, and the power supply control device stops operating when the light emitting module does not emit light.
However, for other circuits such as a communication module, the power control module may still need to operate when not emitting light, and cannot effectively supply power to the other circuits.
Disclosure of Invention
The invention provides a power supply control device and a lamp, which are used for solving the problem that a power supply control module cannot effectively supply power to other circuits such as a communication module when the power supply control module does not emit light.
According to a first aspect of the present invention, there is provided a power supply control apparatus for supplying power to a load of a lamp, comprising: the power supply circuit comprises a power storage circuit, a power storage supply circuit, a control circuit and a feedback circuit; the control circuit is respectively connected with the energy storage power supply circuit and the feedback circuit; the energy storage circuit is respectively connected with the energy storage power supply circuit and the load;
the feedback circuit is used for outputting a first feedback voltage or a second feedback voltage to the control circuit;
the control circuit is used for:
according to the first feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light-emitting module and other circuits in the load can work normally;
according to the second feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light emitting module does not emit light, but other parts or all circuits of the load remain in normal operation.
Optionally, the feedback circuit includes a voltage acquisition module, a first resistance module and a second resistance module; the second resistance module is connected in series between the first resistance module and the ground;
the voltage acquisition module is used for acquiring a basic voltage and supplying power to the first resistance module and the second resistance module by utilizing the basic voltage;
the control circuit is connected to a first node between the first resistance module and the second resistance module;
the resistance value of the second resistance module is adjustable, and when the resistance value of the second resistance module is adjusted to a first resistance value, the control circuit acquires the first feedback voltage from the first node; when the resistance value of the second resistor module is adjusted to a second resistance value, the control circuit collects the second feedback voltage from the first node.
Optionally, the second resistance module includes a first switch, a first resistance unit and a second resistance unit; the first switch is connected with the second resistance unit in series and then connected with the first resistance unit in parallel;
when the first switch is closed, the resistance value of the second resistance module is the first resistance value; when the first switch is opened, the resistance value of the second resistance module is the second resistance value.
Optionally, the first resistor module includes a first resistor, the first resistor unit includes a second resistor, and the second resistor unit includes a third resistor.
Optionally, the energy storage power supply circuit comprises a first winding, a diode, a third resistor module and a second switch;
the first end of the energy storage circuit and the cathode of the diode are connected to a second node, and the second node is connected with an external power supply; the second end of the energy storage circuit and the first winding are connected to a third node;
the positive electrode of the diode and the first end of the first winding are connected to a fourth node, and the second switch and the third resistor module are connected in series and then connected between the fourth node and the ground;
the control end of the second switch is connected with the control circuit, and the control circuit is specifically used for controlling the energy storage power supply circuit to supply power to the energy storage circuit by controlling the switching frequency of the second switch;
the voltage acquisition module comprises a second winding, one end of the second winding is connected with the first resistance module or the second resistance module, and the other end of the second winding is grounded; the second winding is capable of deriving the base voltage from the first winding.
Optionally, the tank circuit includes an output capacitance.
Optionally, the output capacitor is an electrolytic capacitor, a first end of the electrolytic capacitor is a positive electrode end, and a second end of the electrolytic capacitor is a negative electrode end.
Optionally, the first winding and the second winding are primary winding and secondary winding of a transformer.
Optionally, the control circuit controls the energy storage power supply circuit to supply power to the energy storage circuit according to the second feedback voltage, specifically so that: the voltage output by the energy storage circuit to the load meets the following conditions: the light emitting module does not emit light, but the communication module of the load remains in operation.
According to a second aspect of the present invention there is provided a luminaire comprising the power supply control device of the first aspect.
According to the power supply control device provided by the invention, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light-emitting module does not emit light, but other parts or all circuits of the load keep working normally, so that power supply of other circuits of the load is realized when the light-emitting module does not emit light, and meanwhile, the light-emitting module is also used for outputting a first feedback voltage or a second feedback voltage to the control circuit through the feedback circuit; according to the first feedback voltage, the light-emitting module and other circuits in the load can work normally, and according to the second feedback voltage, the light-emitting module does not emit light, but other parts or all circuits of the load keep working normally.
In addition, the energy storage circuit can still play a role when not emitting light, and the utilization rate of the energy storage circuit is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a power supply control device according to the present invention;
FIG. 2 is a schematic diagram of a first power supply control device according to the present invention;
FIG. 3 is a schematic diagram of a third embodiment of a power supply control device;
fig. 4 is a circuit diagram of a power supply control device according to the present invention.
Reference numerals illustrate:
1-a feedback circuit;
11-a first resistor module;
12-a second resistor module;
121-a first resistance unit;
122-a second resistance unit;
q1-a first switch;
r1-a first resistor;
r2-a second resistor;
r3-a third resistor;
13-a voltage acquisition module;
2-a control circuit;
u1-a control chip;
3-an energy storage power supply circuit;
31-a third resistor module;
r4-fourth resistor;
q2-a second switch;
d1-a diode;
an L1-transformer;
l11-a first winding;
l12-a second winding;
uac-external power source;
a 4-tank circuit;
c1-an output capacitor;
5-load.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 is a schematic circuit diagram of a power supply control device according to the present invention.
Referring to fig. 1, the power supply control device is configured to supply power to a load 5 of a lamp, and includes: the energy storage circuit 4, the energy storage power supply circuit 3, the control circuit 2 and the feedback circuit 1.
The control circuit 2 is respectively connected with the energy storage power supply circuit 3 and the feedback circuit 1; the energy storage circuit 4 is respectively connected with the energy storage power supply circuit 3 and the load 5.
The feedback circuit 1 is configured to output a first feedback voltage or a second feedback voltage to the control circuit.
The first feedback voltage and the second feedback voltage may be understood as voltages of different magnitudes, which may be dynamically varying voltages, rather than specifically a single determined voltage value or voltage curve.
The control circuit 2 is configured to:
according to the first feedback voltage, the tank power supply circuit 3 is controlled to supply power to the tank circuit 4, and the voltage output by the tank circuit 4 to the load 5 is made to satisfy: the light emitting modules and other circuits in the load 5 can work normally.
The control process can be any scheme in the field for supplying power to the load 5 by using the energy storage circuit 4, the corresponding control process can be selected according to different power supply circuits 3, different paths can be formed between the energy storage circuit 4 and the energy storage power supply circuit 3 in the specific implementation process, and the control circuit 2 can be used for realizing the switching between the different paths so as to meet the output requirement of the energy storage circuit 4.
According to the second feedback voltage, the tank power supply circuit 3 is controlled to supply power to the tank circuit 4, and the voltage output by the tank circuit 4 to the load 5 is made to satisfy: the light emitting module does not emit light, but other parts or all circuits of the load 5 remain in normal operation.
The implementation of this process may be understood with reference to the process of controlling according to the first feedback voltage, and since the circuit requirements that it meets are different, and correspondingly, the switching frequency between the different paths may be different, the different requirements that are met may also be understood as limitations on the output control of the control circuit 2.
By controlling the second feedback voltage, the embodiment can keep supplying power to other parts or all circuits of the load 5 when the light emitting module does not emit light so as to keep the load operating, compared with the prior art, in which the energy storage circuit 4 does not supply power any more when the light emitting module does not emit light, in one existing scheme, another independent energy storage circuit can be used to supply power to other circuits, which increases the use of the power supply device, but in the embodiment, the embodiment can supply power based on the existing energy storage circuit 4, the scheme is relatively simple, and the use of the power supply device can be saved. Meanwhile, compared with the case that the tank circuit 4 is not used once not emitting light in the prior art, the present embodiment can effectively improve the utilization rate of the tank circuit 4 when the existing tank circuit 4 is used.
Other part or all of the circuits of the load 5 may include, but are not limited to, the following: the device comprises a communication module, a memory module, an image acquisition module, an audio acquisition module, a display module and a sensor. The communication module can be listed as a Bluetooth module, a Zigbee module, a Wifi module and the like, the image acquisition module can be listed as a camera, the audio acquisition module can be listed as a microphone, the display module can be listed as a display screen, and the sensor can be listed as a sound sensor, a distance sensor, a temperature sensor and the like.
Taking a communication module as an example, the control circuit 2 controls the energy storage power supply circuit 3 to supply power to the energy storage circuit 4 according to the second feedback voltage, specifically so that: the voltage output from the tank circuit 4 to the load 5 satisfies: the light emitting module does not emit light, but the communication module of the load remains in operation.
According to the power supply control device provided by the embodiment, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light-emitting module does not emit light, but other parts or all circuits of the load keep working normally, so that power supply of other circuits of the load is realized when the light-emitting module does not emit light, and meanwhile, the light-emitting module is also used for outputting a first feedback voltage or a second feedback voltage to the control circuit through the feedback circuit; according to the first feedback voltage, the light-emitting module and other circuits in the load can work normally, and according to the second feedback voltage, the light-emitting module does not emit light, but other parts or all circuits of the load keep working normally.
In addition, the energy storage circuit can still play a role when not emitting light, and the utilization rate of the energy storage circuit is effectively improved.
Fig. 2 is a schematic circuit diagram of a power supply control device according to a second embodiment of the present invention.
Please refer to fig. 2, which is a further development based on the embodiment of fig. 1, for the feedback circuit 1:
the feedback circuit 1 comprises a voltage acquisition module 13, a first resistance module 11 and a second resistance module 12; the second resistor module 12 is connected in series between the first resistor module 11 and ground.
The voltage acquisition module 13 is configured to acquire a base voltage, and power the first resistor module 11 and the second resistor module 12 with the base voltage. The voltage acquisition module 13 may adopt any scheme in the field that can acquire voltage and use the voltage to supply power to the resistor module. Meanwhile, the base voltage may be a voltage that varies, not a specific voltage value.
The control circuit 2 is connected to a first node between the first resistor module 11 and the second resistor module 12, and is configured to collect a voltage of the first node, which may be a first feedback voltage or a second feedback voltage.
The resistance value of the second resistor module 12 is adjustable, and when the resistance value of the second resistor module 12 is adjusted to a first resistance value, the control circuit acquires the first feedback voltage from the first node; when the resistance of the second resistor module 12 is adjusted to a second resistance, the control circuit 2 collects the second feedback voltage from the first node.
The second resistor module 12 may be any circuit implementation with an adjustable resistance. Through the change of the resistor, the change of the voltage of the first node can be realized, and the voltage collected by the control circuit is changed.
In one embodiment, the second resistor module 12 includes a first switch Q1, a first resistor unit 121, and a second resistor unit 122; the first switch Q1 is connected in series with the second resistor unit 122 and then connected in parallel with the first resistor unit 121. Specifically, when the first switch Q1 is closed, the resistance value of the second resistor module 12 is the first resistance value; when the first switch Q1 is turned on, the resistance of the second resistor module 12 is the second resistance.
Based on the above circuit design, when the first switch Q1 is closed, the resistance value of the second resistor module 12 is a resistance value generated by connecting the first resistor unit 121 and the second resistor unit 122 in parallel, which can correspondingly generate the first feedback voltage; when the first switch Q1 is turned on, the resistance value of the second resistor module 12 is the resistance value of the first resistor unit 121, and the second resistor unit 122 is not connected, which can correspondingly generate the second feedback voltage. It can be seen that the first resistance is smaller than the second resistance, so that the ratio of the first feedback voltage to the voltage divided by the voltage obtaining module 13 is lower than the second feedback voltage.
Through the design, the switching between the two resistance values is realized. In this case, since the second resistor unit 122 is not provided, the first resistor unit 121 and the first resistor module 11 can provide the resistance value for realizing the normal light emission of the light emitting module, and compared with the above, the improvement of the above embodiment is that the second resistor unit 122 and the first switch Q1 are added, and the structure of the original circuit is not damaged. Therefore, the workload of circuit design can be effectively reduced, and the improvement of the existing circuit is facilitated.
In other alternatives, for example, a varistor, a three-contact switch, or the like may be used, and if a three-contact switch is used, it may be disposed at the first node, and the three contacts thereof connect the first resistor unit, the second resistor unit, and the first resistor module, respectively, and dispense with the use of the first switch Q1.
Fig. 3 is a schematic circuit diagram of a power supply control device according to the present invention.
Please refer to fig. 3, which is a further development based on the embodiment of fig. 2, for the tank power supply circuit 3:
the energy storage power supply circuit 3 comprises a first winding L11, a diode D1, a third resistor module 31 and a second switch Q2;
the first end of the tank circuit 4 and the cathode of the diode D1 are connected to a second node, which can refer to the upper end of the diode D1 in fig. 3; the second node is connected with an external power supply Uac; the second end of the tank circuit 4 and the first winding L11 are connected to a third node, which can refer to the right end of the first winding L11 in fig. 3.
The anode of the diode D1 and the first end of the first winding L1 are connected to a fourth node, which can refer to the left end of the first winding L11 in fig. 3; the second switch Q2 is connected in series with the third resistor module 31 and then connected between the fourth node and ground.
The control end of the second switch Q2 is connected to the control circuit 2, and the control circuit 2 is specifically configured to control the energy storage power supply circuit 3 to supply power to the energy storage circuit 4 by controlling the switching frequency of the second switch Q2.
Taking the circuit shown in fig. 3 as an example, when the second switch Q2 is closed, a path can be formed between the tank circuit 4, the first winding L11, the second switch Q2, the third resistor module 31 and the ground, and when the second switch Q2 is open, a path can be formed between the tank circuit 4, the first winding L11, the diode D1 and the tank circuit 4, so that different paths of the tank circuit 4 can be realized by switching the second switch Q2, and power supply control of the tank circuit 4 can be realized by switching between the two paths.
Specifically, it can be understood that: the longer the second switch Q2 is closed, the greater the voltage output through the tank circuit 4; the shorter the second switch Q2 is closed, the smaller the voltage output via the tank circuit 4.
Based on the above tank power supply circuit 3, the present embodiment can obtain the base voltage using the first winding L11 of the tank power supply circuit 3. The voltage acquisition module 13 includes a second winding L12, one end of the second winding L12 is connected to the first resistor module 11 or the second resistor module 12, and the other end is grounded to form a power supply path; the second winding L12 is capable of obtaining the base voltage from the first winding L11. The first winding L11 and the second winding L12 may be primary windings and secondary windings of the transformer L1.
It can be seen that the base voltage is obtained from the voltage at which the tank power supply circuit 3 supplies power to the tank circuit 4, and may specifically be proportional to the voltage across the first winding L11. When the diode D1 is turned on, the voltage across the first winding L11 is the same as the voltage across the tank circuit 4.
In other alternative embodiments, the base voltage according to the requirement may be directly generated, or the base voltage may be obtained from the load side, so long as the generated first feedback voltage and second feedback voltage can trigger different control of the tank power supply circuit 3, and the control result satisfies the two power supply requirements of the tank power circuit 4 on the load 5, which does not depart from the spirit of the present invention.
Fig. 4 is a circuit diagram of a power supply control device according to the present invention.
Please refer to fig. 4, which is understood as a further development of the embodiment of fig. 1.
For the first resistor module 11, it may include a first resistor R1, and in other alternative embodiments, the first resistor module 11 may be formed by combining a plurality of resistors, and the resistors may be connected in parallel or in series.
For the first resistor unit 121 therein, it may include a second resistor R2, and for the second resistor unit 122 therein, it may include a third resistor R3. Similar to the first resistor module 11, in other alternative embodiments, the first resistor unit 121 and the second resistor unit 122 may be formed by combining multiple groups, where resistors may be connected in parallel or in series.
Referring to fig. 4, after the third resistor R3 is connected in series with the first switch Q1, it is connected in parallel with the second resistor R2, the first end of the first resistor R1 is connected to the second winding L1, the second end of the first resistor R1 is respectively connected to the first end of the third resistor R3 and the first end of the second resistor R2, the second end of the third resistor R3 is connected to the first end of the first switch Q1, and the second end of the first switch Q1 and the second end of the second resistor R2 are grounded.
For the tank circuit 4, an output capacitor C1 may be included, where two ends of the output capacitor C1 are respectively connected to the second node and the third node. The output capacitor C1 may be an electrolytic capacitor, the electrolytic capacitor is one of capacitors, the metal foil is an anode (aluminum or tantalum), an oxide film (aluminum oxide or tantalum pentoxide) closely attached to the metal with the anode is a dielectric, and the cathode is composed of a conductive material, an electrolyte (the electrolyte may be liquid or solid) and other materials.
When the electrolytic capacitor does not need to work (for example, when dimming is performed), the voltage of the first node is set to be a lower voltage, so that the electrolytic capacitor outputs a lower voltage and continues to be used for other circuits.
In addition, the control circuit 2 may be a specific chip or a specific circuit, and in one embodiment, the chip or the circuit may include a comparator, a subtracter, an amplifier, and other devices, for example, the control circuit may include a subtracter and a comparator, where a first input end of the subtracter is connected to a first node, a second input end of the subtracter is connected to a reference voltage, the subtracter calculates a difference between a voltage of the first node and the reference voltage, and the comparator compares the difference or the voltage obtained by amplifying the difference with a difference threshold, and further outputs a high level signal or a low level signal according to a comparison result to control opening and closing of the second switch Q2. The method can be realized in a circuit mode or a software mode, and meanwhile, the specific realization of the control logic is not limited to the process of firstly calculating and then comparing by the subtracter.
The processing logic of the control circuit 2 employed in correspondence with it may also vary, based on different basic voltage acquisition modes, different feedback circuits 1 or different tank power supply circuits 3, without being limited to the above list.
In the specific implementation process, the process of power supply control can be understood as follows:
when the control end input of the first switch Q1 is at a high level, the third resistor R3 is connected into the circuit, the output voltage is higher, and normal operation and use are met; when the control end of the first switch Q1 is input to a low level, the third resistor R3 is turned off, the output voltage is lower, the light emitting module is not bright, but the output capacitor C1 still has voltage, and the voltage can be continuously supplied to other circuits (such as a communication module, a memory module, an image acquisition module, an audio acquisition module, a display module, and a sensor) to work.
The embodiment also provides a lamp, which comprises the power supply control device related to the scheme.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention 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 or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A power supply control device for supplying power to a load of a lamp, comprising: the power supply circuit comprises a power storage circuit, a power storage supply circuit, a control circuit and a feedback circuit; the control circuit is respectively connected with the energy storage power supply circuit and the feedback circuit; the energy storage circuit is respectively connected with the energy storage power supply circuit and the load;
the feedback circuit is used for outputting a first feedback voltage or a second feedback voltage to the control circuit;
the control circuit is used for:
according to the first feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light-emitting module and other circuits in the load can work normally;
according to the second feedback voltage, the energy storage power supply circuit is controlled to supply power to the energy storage circuit, and the voltage output by the energy storage circuit to the load is enabled to meet the following conditions: the light emitting module does not emit light, but other parts or all circuits of the load remain in normal operation.
2. The apparatus of claim 1, wherein the feedback circuit comprises a voltage acquisition module, a first resistance module, and a second resistance module; the second resistance module is connected in series between the first resistance module and the ground;
the voltage acquisition module is used for acquiring a basic voltage and supplying power to the first resistance module and the second resistance module by utilizing the basic voltage;
the control circuit is connected to a first node between the first resistance module and the second resistance module;
the resistance value of the second resistance module is adjustable, and when the resistance value of the second resistance module is adjusted to a first resistance value, the control circuit acquires the first feedback voltage from the first node; when the resistance value of the second resistor module is adjusted to a second resistance value, the control circuit collects the second feedback voltage from the first node.
3. The apparatus of claim 2, wherein the second resistance module comprises a first switch, a first resistance unit, and a second resistance unit; the first switch is connected with the second resistance unit in series and then connected with the first resistance unit in parallel;
when the first switch is closed, the resistance value of the second resistance module is the first resistance value; when the first switch is opened, the resistance value of the second resistance module is the second resistance value.
4. The apparatus of claim 3, wherein the first resistance module comprises a first resistance, the first resistance unit comprises a second resistance, and the second resistance unit comprises a third resistance.
5. The apparatus of claim 2, wherein the base voltage is derived from a voltage at which a tank power supply circuit supplies power to the tank circuit.
6. The apparatus according to any one of claims 2 to 5, further comprising: the energy storage power supply circuit comprises a first winding, a diode, a third resistance module and a second switch;
the first end of the energy storage circuit and the cathode of the diode are connected to a second node, and the second node is connected with an external power supply; the second end of the energy storage circuit and the first winding are connected to a third node;
the positive electrode of the diode and the first end of the first winding are connected to a fourth node, and the second switch and the third resistor module are connected in series and then connected between the fourth node and the ground;
the control end of the second switch is connected with the control circuit, and the control circuit is specifically used for controlling the energy storage power supply circuit to supply power to the energy storage circuit by controlling the switching frequency of the second switch;
the voltage acquisition module comprises a second winding, one end of the second winding is connected with the first resistance module or the second resistance module, and the other end of the second winding is grounded; the second winding is capable of deriving the base voltage from the first winding.
7. The apparatus of any one of claims 1 to 5, wherein the tank circuit comprises an output capacitance.
8. The apparatus of claim 7, wherein the output capacitor is an electrolytic capacitor, a first end of the electrolytic capacitor is a positive end, and a second end of the electrolytic capacitor is a negative end.
9. The apparatus according to any one of claims 1 to 5, wherein the control circuit controls the tank power supply circuit to supply power to the tank circuit according to the second feedback voltage, specifically such that: the voltage output by the energy storage circuit to the load meets the following conditions: the light emitting module does not emit light, but the communication module of the load remains in operation.
10. A luminaire comprising the power supply control device of any one of claims 1 to 9.
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| CN201711437414.0A CN108112149B (en) | 2017-12-26 | 2017-12-26 | Power supply control device and lamp |
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| CN201711437414.0A CN108112149B (en) | 2017-12-26 | 2017-12-26 | Power supply control device and lamp |
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| CN108112149B true CN108112149B (en) | 2023-07-07 |
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| CN108112149A (en) | 2018-06-01 |
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