CN218473434U - Desk lamp low-power consumption lighting circuit - Google Patents
Desk lamp low-power consumption lighting circuit Download PDFInfo
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- CN218473434U CN218473434U CN202221887760.5U CN202221887760U CN218473434U CN 218473434 U CN218473434 U CN 218473434U CN 202221887760 U CN202221887760 U CN 202221887760U CN 218473434 U CN218473434 U CN 218473434U
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Abstract
The utility model discloses a low-power consumption lighting circuit of a desk lamp, which comprises a relay switch circuit, a power supply conversion module, a lamp power supply circuit and a single chip controller, wherein the power input end of the relay switch circuit is connected with an input power supply; the power output end of the relay switch circuit is connected with the input end of the power conversion module; the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source to drive the lamp source to emit light; the single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit so as to carry out dimming control on the lamp source through the lamp power supply circuit, and when no illumination is carried out, the input power supply of the power supply conversion module is cut off through the relay switch circuit, so that the standby power consumption of the lamp power supply circuit can be completely cut off, and the low-power-consumption standby of the lamp power supply circuit is realized.
Description
Technical Field
The utility model relates to a desk-top reading lamp control circuit technical field especially relates to a desk-top light low-power consumption lighting circuit.
Background
The desk lamp is a common article in daily life and is used for illuminating a certain energy area. The stand-by function of the existing floor type desk type lighting lamp is relatively large, so that when the desk type reading lamp is not used for lighting, the output current of a lamp power supply circuit is controlled to be 0 ampere current output in a controller mode. Although the output current of the lamp power supply circuit is 0 ampere, the lamp cannot be driven to emit light. At this time, the illumination lamp is in a standby state. However, at this time, since the power chip of the lamp power supply circuit is in a standby state, a certain amount of electric energy is consumed, and the lamp cannot meet the requirement of low power consumption.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving one of the technical problems in the related art at least to a certain extent. Therefore, the utility model discloses an aim at provides a desk lamp low-power consumption lighting circuit.
In order to achieve the above object, an embodiment of the present invention provides a desk lamp low power consumption lighting circuit, including:
the power supply input end of the relay switch circuit is connected with an input power supply;
the power output end of the relay switch circuit is connected with the input end of the power conversion module;
the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source to drive the lamp source to emit light;
and the single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit so as to carry out dimming control on the lamp source through the lamp power supply circuit and cut off the input power supply of the power supply conversion module through the relay switch circuit when no illumination exists.
Further, according to an embodiment of the present invention, the relay switch circuit includes:
a base electrode of the triode Q1 is connected with one control end of the single-chip microcomputer controller through a resistor R12, an emitting electrode of the triode Q1 is connected with a reference ground, and the emitting electrode of the triode Q1 is also connected with the base electrode of the triode Q1 through a resistor R13;
relay JDQ2, a control end of relay JDQ2 pass through resistance R11 with triode Q1's collecting electrode is connected, another control end of relay JDQ2 is connected with power supply, relay JDQ 2's power input end with input power connects, relay JDQ 2's power output end with power conversion module's input is connected.
Further, according to an embodiment of the present invention, the relay switch circuit further includes:
diode D2, diode D2's positive pole with relay JDQ 2's a control end is connected, diode D2's negative pole with relay JDQ 2's another control end is connected.
Further, according to the utility model discloses an embodiment, desk lamp low-power consumption lighting circuit still includes:
the first power interface is used for introducing an input power supply and is connected with the power input end of the relay switch circuit;
and the power supply conversion module is connected with the power supply output end of the relay switch circuit through the second power supply interface.
Further, according to the utility model discloses an embodiment, desk lamp low-power consumption lighting circuit still includes:
a voltage conversion circuit connected to the input power source and the relay switch circuit, respectively; the input power supply is alternating current in a range of 90-360V; the voltage conversion circuit is used for converting an input power supply into low-voltage direct current and then providing switch control power supply voltage for the relay switch circuit.
Further, according to the utility model discloses an embodiment, desk lamp low-power consumption lighting circuit still includes: a power filter circuit, the voltage conversion circuit through the power filter circuit with the input power is connected, the power filter circuit includes:
one end of the fuse is connected with one end of the input power supply;
one end of the piezoresistor is connected with the other end of the fuse, and the other end of the piezoresistor is connected with the other end of the input power supply;
one end of the first filter capacitor is connected with the other end of the fuse, and the other end of the first filter capacitor is connected with the other end of the input power supply;
and the voltage input end of the voltage conversion circuit is connected with two ends of the first filter capacitor through the first common mode choke coil.
Further, according to the utility model discloses an embodiment, desk lamp low-power consumption lighting circuit still includes: the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module through the direct current filter circuit, and the direct current filter circuit comprises:
one end of the second filter capacitor is connected with one power output end of the power conversion module, and the other end of the second filter capacitor is connected with the other power output end of the power conversion module;
and the input end of the lamp power supply circuit is connected with the two power output ends of the power conversion module through the second common mode choke coil.
Further, according to the utility model discloses an embodiment, lamps and lanterns supply circuit includes:
the power supply input end of the first street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the first street lamp source power supply circuit is connected with a first street lamp source, and the PWM dimming control end of the first street lamp source power supply circuit is connected with the first dimming control end of the single chip microcomputer controller;
the power supply input end of the second light source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the second light source power supply circuit is connected with the second light source, and the PWM dimming control end of the second light source power supply circuit is connected with the second dimming control end of the single chip microcomputer controller;
a power input end of the third lamp source power supply circuit is connected with a low-voltage direct-current output end of the voltage conversion circuit, an output end of the third lamp source power supply circuit is connected with a third lamp source, and a PWM dimming control end of the third lamp source power supply circuit is connected with a third dimming control end of the single-chip microcomputer controller;
and the power supply input end of the fourth street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the fourth street lamp source power supply circuit is connected with a fourth street lamp source, and the PWM dimming control end of the fourth street lamp source power supply circuit is connected with the fourth dimming control end of the single chip microcomputer controller.
Further, according to the utility model discloses an embodiment, first street lamp source supply circuit includes:
the first peripheral circuit is connected with the first power chip, the current and voltage adjusting end of the first power chip is connected with the single chip microcomputer controller, and the first power chip is used for adjusting and controlling the power supply current and voltage output to the lamp source according to the PWM (pulse width modulation) signal output by the single chip microcomputer controller.
Further, according to the utility model discloses an embodiment, desk lamp low-power consumption lighting circuit still includes: and the 3.3V power supply circuit is respectively connected with the voltage conversion circuit and the single chip microcomputer controller so as to convert the low-voltage direct current output by the voltage conversion circuit into 3.3V power supply voltage and supply power for the single chip microcomputer controller.
The low-power-consumption lighting circuit of the desk lamp provided by the embodiment of the utility model is connected with an input power supply through the power input end of the relay switch circuit; the power output end of the relay switch circuit is connected with the input end of the power conversion module; the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source to drive the lamp source to emit light; the single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit so as to carry out dimming control on the lamp source through the lamp power supply circuit, and when no illumination is carried out, the input power supply of the power supply conversion module is cut off through the relay switch circuit, so that the standby power consumption of the lamp power supply circuit can be completely cut off, and the low-power-consumption standby of the lamp power supply circuit is realized.
Drawings
Fig. 1 is a schematic diagram of a low-power consumption lighting circuit of a desk lamp according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power filter circuit, a voltage conversion module, a relay switch circuit, a first power interface, and a second power interface provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of a circuit structure of a single chip microcomputer controller provided by the embodiment of the present invention;
fig. 4 is a schematic diagram of a lamp power supply circuit structure provided in an embodiment of the present invention;
fig. 5 is a schematic diagram of a 3.3V power supply circuit structure provided by the embodiment of the present invention.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1 to 4, an embodiment of the present invention provides a desk lamp low-power consumption lighting circuit, including: the lamp power supply comprises a relay switch circuit, a power supply conversion module, a lamp power supply circuit and a single chip microcomputer controller, wherein the power supply input end of the relay switch circuit is connected with an input power supply; the power supply output end of the relay switch circuit is connected with the input end of the power supply conversion module; as shown in fig. 1 and 2, the low power consumption lighting circuit of the desk lamp further includes: the relay switch circuit comprises a first power interface and a second power interface, wherein the first power interface is used for introducing an input power supply and is connected with a power input end of the relay switch circuit; and the power supply conversion module is connected with the power supply output end of the relay switch circuit through the second power supply interface. The input power supply is alternating current in a range of 90-360V. Thus, the input power can be controlled to be turned on or off through the relay switch circuit. When the input power supply is conducted, the power supply conversion module is used for converting the input power supply into low-voltage direct current and outputting the low-voltage direct current to the lamp power supply circuit.
The input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source to drive the lamp source to emit light.
The single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit so as to carry out dimming control on the lamp source through the lamp power supply circuit, and cut off the input power supply of the power supply conversion module through the relay switch circuit when no illumination exists. As shown in fig. 1, the on/off control of the relay switch circuit can be performed by the single chip microcomputer controller. When the lamp is in a working state, the single-chip microcomputer controller can control the relay switch circuit to be conducted, an input electric power source is output to the power conversion module, the input electric power source is converted into low-voltage direct current (for example, 220V alternating current is converted into 42V) through the power conversion module, the low-voltage direct current is output to the lamp power supply circuit, and the lamp power source is driven to emit light through the lamp power supply circuit. When the lamp is not in a working state, the single-chip microcomputer controller can control the relay switch circuit to be switched off, so that the power supply of the power supply conversion module and the lamp power supply circuit is cut off, the standby loss of the power supply conversion module and the lamp power supply circuit is further cut off, and the standby loss of the lamp can be greatly reduced.
The low-power-consumption lighting circuit of the desk lamp provided by the embodiment of the utility model is connected with an input power supply through the power input end of the relay switch circuit; the power output end of the relay switch circuit is connected with the input end of the power conversion module; the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source to drive the lamp source to emit light; the single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit, so that the lamp power supply circuit can be used for carrying out dimming control on the lamp source, and when no illumination exists, the relay switch circuit is used for cutting off the input power supply of the power supply conversion module, the standby power consumption of the lamp power supply circuit can be completely cut off, and the low-power-consumption standby of the lamp power supply circuit is realized.
Referring to fig. 2 and 3, the relay switching circuit includes: the base electrode of the triode Q1 is connected with one control end of the single chip microcomputer controller through a resistor R12, the emitting electrode of the triode Q1 is connected with a reference ground, and the emitting electrode of the triode Q1 is also connected with the base electrode of the triode Q1 through a resistor R13; a control end of relay JDQ2 pass through resistance R11 with triode Q1's collecting electrode is connected, another control end of relay JDQ2 is connected with power supply, relay JDQ 2's power input end with input power connects, relay JDQ 2's power output end with power conversion module's input is connected.
As shown in fig. 2 and 3, the base of the transistor Q1 is connected to the J4 interface of the mcu through the interfaces of the resistors R12 and J9, and the mcu outputs a relay ON/OFF control signal through an ON/OFF signal line. When the ON/OFF is a high level signal, the collector and the emitter of the triode Q1 can be conducted, the relay JDQ2 generates magnetic attraction to close the conducting switch, and an input power supply can be output to the power supply conversion module through the conducting switch, so that the power supply conversion module is powered. ON the contrary, when the ON/OFF is a low level signal, the triode Q1 is turned OFF, the conducting switch is turned OFF, and the power supply of the power conversion module and the rear lamp power supply circuit is cut OFF, so that the standby loss is reduced.
Referring to fig. 2, the relay switching circuit further includes: diode D2, diode D2's positive pole with relay JDQ 2's a control end is connected, diode D2's negative pole with relay JDQ 2's another control end is connected.
Through diode D2 is parallelly connected in relay JDQ2 both ends control, when triode Q1 ends, can with the counterattack voltage absorption of the charging coil in relay JDQ 2. The triode Q1 is prevented from being damaged by high-voltage counterattack voltage.
Referring to fig. 1 and 2, the low power consumption lighting circuit of the desk lamp further includes: the voltage conversion circuit is respectively connected with the input power supply and the relay switch circuit; the input power supply is alternating current in a range of 90-360V; the voltage conversion circuit is used for converting an input power supply into low-voltage direct current and then providing switch control power supply voltage for the relay switch circuit. As shown in fig. 2, the voltage conversion circuit can convert 220V commercial power ac input power into 12V low voltage dc, and output it to provide working power voltage for the relay switch circuit.
Referring to fig. 1 and 2, the low power consumption lighting circuit of the desk lamp further includes: a power filter circuit through which the voltage conversion circuit is connected to the input power, as shown in fig. 2, the power filter circuit including: the filter circuit comprises a fuse, a piezoresistor, a first filter capacitor and a first common mode choke coil; one end of the fuse is connected with one end of the input power supply; one end of the piezoresistor is connected with the other end of the fuse, and the other end of the piezoresistor is connected with the other end of the input power supply; one end of the first filter capacitor is connected with the other end of the fuse, and the other end of the first filter capacitor is connected with the other end of the input power supply; and the voltage input end of the voltage conversion circuit is connected with two ends of the first filter capacitor through the first common-mode choke coil.
Specifically, because input power passes through the interface and is connected with alternating current power supply output, when the plug is pegged graft or is disturbed by the external, all can produce interfering signal or strong pulse signal, through piezo-resistor can be with strong pulse signal filtering, through first filter capacitor and first common mode choke coil can be with interfering signal filtering, can blow when the heavy current appears in the circuit through the fuse to protection back end circuit.
Referring to fig. 1 and 4, the low power consumption lighting circuit of the desk lamp further includes: the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module through the direct current filter circuit, and the direct current filter circuit comprises: one end of the second filter capacitor is connected with one power output end of the power conversion module, and the other end of the second filter capacitor is connected with the other power output end of the power conversion module; and the input end of the lamp power supply circuit is connected with the two power supply output ends of the power supply conversion module through the second common mode choke coil.
Specifically, because lamps and lanterns supply circuit need provide power supply for the lamp source to the drive lamp source is luminous the utility model discloses in the implementation, the lamp source is LED lamp source. In order to avoid the damage of the unstable power supply voltage to the LED lamp source and ensure the stability of the light emission of the lamp source, the second filter capacitor and the second common mode choke coil can filter the unstable interference source, so that the stable power supply voltage is output to the lamp power supply circuit.
Referring to fig. 1 and 4, the lamp power supply circuit includes: the power supply input end of the first street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the first street lamp source power supply circuit is connected with the first street lamp source, and the PWM dimming control end of the first street lamp source power supply circuit is connected with the first dimming control end of the single chip microcomputer controller; the power supply input end of the second light source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the second light source power supply circuit is connected with the second light source, and the PWM dimming control end of the second light source power supply circuit is connected with the second dimming control end of the single chip microcomputer controller; the power supply input end of the third lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the third lamp source power supply circuit is connected with a third lamp source, and the PWM dimming control end of the third lamp source power supply circuit is connected with the third dimming control end of the single chip microcomputer controller; the power supply input end of the fourth street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the fourth street lamp source power supply circuit is connected with the fourth street lamp source, and the PWM dimming control end of the fourth street lamp source power supply circuit is connected with the fourth dimming control end of the single-chip microcomputer controller.
Specifically, as shown in fig. 4, after the output power of the power conversion module is subjected to voltage conversion by the first, second, third and fourth light source power supply circuits, 4 independent LED light sources are output to drive the 4 LED light bars to emit light. Because the 4 street lamp source power supply circuits are mutually independent, the mutual influence is reduced, and the illumination state of the lamp is more stable.
As shown in fig. 4, the first streetlamp power supply circuit includes: the first power supply chip is used for adjusting and controlling the power supply current and voltage output to the lamp source according to the PWM pulse width modulation signal output by the single chip microcomputer controller. And the voltage regulating end of the first power supply chip is connected with the single chip microcomputer controller through a PWM1 signal. Therefore, under the control of the singlechip controller, the output voltage of the first power supply chip can be regulated and controlled, and the lamp source at the output end of the lamp power supply circuit is connected, so that the lamp light regulation and the on-off control are carried out on the lamp source.
Referring to fig. 1 and 5, the low power consumption lighting circuit of the desk lamp further includes: and the 3.3V power supply circuit is respectively connected with the voltage conversion circuit and the single chip microcomputer controller so as to convert the low-voltage direct current output by the voltage conversion circuit into 3.3V power supply voltage and supply power for the single chip microcomputer controller.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalent substitutions can be made on the technical solutions described in the foregoing embodiments or some technical features thereof. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (10)
1. A desk lamp low-power consumption lighting circuit which is characterized by comprising:
the power supply input end of the relay switch circuit is connected with an input power supply;
the power output end of the relay switch circuit is connected with the input end of the power conversion module;
the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module, and the output end of the lamp power supply circuit is connected with the lamp source so as to drive the lamp source to emit light;
and the single chip microcomputer controller is respectively connected with the power supply conversion module and the relay switch circuit so as to carry out dimming control on the lamp source through the lamp power supply circuit and cut off the input power supply of the power supply conversion module through the relay switch circuit when no illumination exists.
2. The desk lamp low power consumption lighting circuit according to claim 1, wherein the relay switch circuit comprises:
the base electrode of the triode Q1 is connected with one control end of the single chip microcomputer controller through a resistor R12, the emitting electrode of the triode Q1 is connected with a reference ground, and the emitting electrode of the triode Q1 is also connected with the base electrode of the triode Q1 through a resistor R13;
relay JDQ2, a control end of relay JDQ2 pass through resistance R11 with triode Q1's collecting electrode is connected, another control end of relay JDQ2 is connected with power supply, relay JDQ 2's power input end with input power connects, relay JDQ 2's power output end with power conversion module's input is connected.
3. The desk lamp low power consumption lighting circuit according to claim 2, wherein the relay switch circuit further comprises:
diode D2, diode D2's positive pole with relay JDQ 2's a control end is connected, diode D2's negative pole with relay JDQ 2's another control end is connected.
4. The desk lamp low power consumption lighting circuit of claim 1, further comprising:
the first power interface is used for introducing an input power supply and is connected with the power input end of the relay switch circuit;
and the power supply conversion module is connected with the power supply output end of the relay switch circuit through the second power supply interface.
5. The desk lamp low power consumption lighting circuit of claim 4, further comprising:
a voltage conversion circuit connected to the input power source and the relay switch circuit, respectively; the input power supply is alternating current in a range of 90-360V; the voltage conversion circuit is used for converting an input power supply into low-voltage direct current and then providing switch control power supply voltage for the relay switch circuit.
6. The desk lamp low-power consumption lighting circuit according to claim 5, further comprising: a power filter circuit, the voltage conversion circuit through the power filter circuit with the input power is connected, the power filter circuit includes:
one end of the fuse is connected with one end of the input power supply;
one end of the piezoresistor is connected with the other end of the fuse, and the other end of the piezoresistor is connected with the other end of the input power supply;
one end of the first filter capacitor is connected with the other end of the fuse, and the other end of the first filter capacitor is connected with the other end of the input power supply;
and the voltage input end of the voltage conversion circuit is connected with two ends of the first filter capacitor through the first common mode choke coil.
7. The desk lamp low power consumption lighting circuit of claim 1, further comprising: the input end of the lamp power supply circuit is connected with the output end of the power supply conversion module through the direct current filter circuit, and the direct current filter circuit comprises:
one end of the second filter capacitor is connected with one power supply output end of the power supply conversion module, and the other end of the second filter capacitor is connected with the other power supply output end of the power supply conversion module;
and the input end of the lamp power supply circuit is connected with the two power supply output ends of the power supply conversion module through the second common mode choke coil.
8. The desk lamp low power consumption lighting circuit of claim 5, wherein the lamp power supply circuit comprises:
the power supply input end of the first street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the first street lamp source power supply circuit is connected with a first street lamp source, and the PWM dimming control end of the first street lamp source power supply circuit is connected with the first dimming control end of the single chip microcomputer controller;
the power supply input end of the second light source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the second light source power supply circuit is connected with the second light source, and the PWM dimming control end of the second light source power supply circuit is connected with the second dimming control end of the single chip microcomputer controller;
a third lamp source power supply circuit, wherein a power supply input end of the third lamp source power supply circuit is connected with a low-voltage direct current output end of the voltage conversion circuit, an output end of the third lamp source power supply circuit is connected with a third lamp source, and a PWM dimming control end of the third lamp source power supply circuit is connected with a third dimming control end of the single chip microcomputer controller;
and the power supply input end of the fourth street lamp source power supply circuit is connected with the low-voltage direct current output end of the voltage conversion circuit, the output end of the fourth street lamp source power supply circuit is connected with a fourth street lamp source, and the PWM dimming control end of the fourth street lamp source power supply circuit is connected with the fourth dimming control end of the singlechip controller.
9. The desk lamp low power consumption lighting circuit of claim 8, wherein the first street light source power supply circuit comprises:
the first peripheral circuit is connected with the first power chip, the current and voltage adjusting end of the first power chip is connected with the single chip microcomputer controller, and the first power chip is used for adjusting and controlling the power supply current and voltage output to the lamp source according to the PWM (pulse width modulation) signal output by the single chip microcomputer controller.
10. The desk lamp low power consumption lighting circuit of claim 6, further comprising: and the 3.3V power supply circuit is respectively connected with the voltage conversion circuit and the single chip microcomputer controller so as to convert the low-voltage direct current output by the voltage conversion circuit into 3.3V power supply voltage and supply power for the single chip microcomputer controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221887760.5U CN218473434U (en) | 2022-07-21 | 2022-07-21 | Desk lamp low-power consumption lighting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221887760.5U CN218473434U (en) | 2022-07-21 | 2022-07-21 | Desk lamp low-power consumption lighting circuit |
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| CN218473434U true CN218473434U (en) | 2023-02-10 |
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| CN202221887760.5U Active CN218473434U (en) | 2022-07-21 | 2022-07-21 | Desk lamp low-power consumption lighting circuit |
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