CN217591143U - Multifunctional LED driving circuit - Google Patents
Multifunctional LED driving circuit Download PDFInfo
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- CN217591143U CN217591143U CN202122942630.9U CN202122942630U CN217591143U CN 217591143 U CN217591143 U CN 217591143U CN 202122942630 U CN202122942630 U CN 202122942630U CN 217591143 U CN217591143 U CN 217591143U
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Abstract
The utility model discloses a multifunctional LED drive circuit, which comprises a piecewise linear PWM dimming power supply and a single chip microcomputer U7, wherein the input end of the piecewise linear PWM dimming power supply is connected with an alternating current power supply output by a fuse, and the piecewise linear PWM dimming power supply utilizes different voltages controlled and output by sine waves at different times to light LED lamp beads with different colors; the power supply end of the single chip microcomputer U7 is connected with a constant voltage circuit, and the constant voltage circuit is connected to an alternating current power supply with the input end connected with the alternating current power supply output by the fuse. The utility model discloses a multi-functional LED drive circuit adopts thereby the piecewise linearity PWM adjusts luminance the power and utilizes the different time voltage of sine wave different to realize lightening the spectrum that LED lamp pearl of different colours reached the ideal. The utility model discloses a multi-functional LED drive circuit adopts to increase simple step-down circuit on the linear power supply of main part and gives the singlechip power supply, thereby realize control functions such as knob accent light and knob cycle timing to singlechip and main part power integration an organic whole.
Description
Technical Field
The utility model relates to a drive circuit, specific saying so relates to a multi-functional LED drive circuit.
Background
The existing LED drive circuit generally adopts a topological structure of a switching power supply and has single-path constant current output. If there is a modulation spectrum, multiple outputs may be required, and the power supply typically uses 0-10V dimming. Such a circuit is relatively complex. The cost is relatively expensive.
The existing LED power supply only adopts 0-10V dimming in a single-path or multi-path constant current switching power supply mode, the LED power supply can be realized by using multi-path output to light LED lamp beads with different colors if the spectrum needs to be realized, and additional control panels need to be added if additional control functions such as timing and the like are needed. The complex circuit components increase the failure rate of the product and cause the cost of the product to be expensive.
SUMMERY OF THE UTILITY MODEL
To the deficiency among the prior art, the to-be-solved technical problem of the utility model lies in providing a multi-functional LED drive circuit, and the purpose of designing this multi-functional LED drive circuit is to realize various control functions.
In order to solve the technical problem, the utility model discloses a following scheme realizes: the utility model discloses a multi-functional LED drive circuit, this multi-functional LED drive circuit insert AC power supply, and AC power supply's L line and N line respectively connect two parallelly connected fuses, and this multi-functional LED drive circuit includes:
the input end of the piecewise linear PWM dimming power supply is connected with an alternating current power supply output by a fuse, and LED lamp beads with different colors are lightened by using different voltages which are controlled and output by sine waves at different time;
the power supply end of the single chip U7 is connected with a constant voltage circuit, and the constant voltage circuit is connected to an alternating current power supply with the input end connected with the alternating current power supply output by the fuse.
Further, the piecewise linear PWM dimming power supply comprises a piecewise linear PWM dimming circuit, and the piecewise linear PWM dimming circuit comprises:
a pin 1 and a pin 3 of the bridge rectifier diode BD3 are respectively connected with an L line and an N line of an alternating current power supply passing through a fuse, and a piezoresistor RV1 is connected between the pin 1 and the N line of the bridge rectifier diode BD 3;
a first resistor group formed by connecting a resistor R13, a resistor R14 and a resistor R15 in series, wherein two ends of the first resistor group are respectively connected to pin 2 of the bridge rectifier diode BD3 and pin 4 of the bridge rectifier diode BD 3;
a second resistor group formed by connecting a resistor R18, a resistor R16, a resistor R19 and a resistor R17 in series, wherein one end of the second resistor group is connected to pin 2 of the bridge rectifier diode BD 3;
the device comprises a control chip U1, a control chip U2 and a control chip U3, wherein a VDD pin of the control chip U1, a VDD pin of the control chip U2 and a VDD pin of the control chip U3 are connected with each other; the GND pin of the control chip U1, the GND pin of the control chip U2 and the GND pin of the control chip U3 are connected with each other; the MULT pin of the control chip U1, the MULT pin of the control chip U2 and the MULT pin of the control chip U3 are connected with each other; the DR1 pin of the control chip U1, the DR1 pin of the control chip U2 and the DR1 pin of the control chip U3 are connected with each other; the DR2 pin of the control chip U1, the DR2 pin of the control chip U2 and the DR2 pin of the control chip U3 are connected with each other; the DR4 pin of the control chip U1, the DR4 pin of the control chip U2 and the DR4 pin of the control chip U3 are connected with each other; a VDD pin of the control chip U1 is connected to a capacitor C5, the VDD pin of the control chip U1 is further connected to the other end of the second resistor group, the other end of the capacitor C5 is connected to the 4 pin of the bridge rectifier diode BD3 and grounded, the GND pin of the control chip U1 is connected to the ground terminal of the capacitor C5, a MULT pin of the control chip U1 is connected to a circuit node between the resistor R13 and the resistor R14, a CS pin of the control chip U1 is connected to a resistor R12, and the other end of the resistor R12 is connected to the ground terminal of the capacitor C5; a resistor R27 is connected between the CS pin of the control chip U2 and the GND pin of the control chip U2, a resistor R28 is connected between the CS pin of the control chip U3 and the GND pin of the control chip U3, a capacitor CS1 is connected between the GND pin of the control chip U3 and the DR4 pin of the control chip U3, and the control chip U1, the control chip U2 and the control chip U3 are all provided with PWM dimming ports which are connected with one another;
the light source comprises four light emitting diodes connected in series, the positive electrode input end of the light source is connected to a pin 2 of the bridge rectifier diode BD3, a pin DR1 of the control chip U1 is connected to a circuit node between a first light emitting diode and a second light emitting diode, a pin DR2 of the control chip U1 is connected to a circuit node between the second light emitting diode and a third light emitting diode, a pin DR3 of the control chip U1 is connected to a circuit node between the third light emitting diode and a fourth light emitting diode, and a pin DR4 of the control chip U1 is connected to the negative electrode end of the light source.
Further, the constant voltage circuit includes:
a pin 1 and a pin 3 of the bridge rectifier diode BD2 are respectively connected with an L line and an N line of an alternating current power supply after passing through a fuse;
a pin C of the buck control chip U6 is respectively connected to a pin 2 of the bridge rectifier diode BD2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, a pin 4 of the bridge rectifier diode BD2 is connected to a ground end of the capacitor C2, a pin FB of the chip U6 is connected to a resistor R11, a pin VDD of the chip U6 is connected to a capacitor C3, a pin GND of the chip U6 is respectively connected to the other end of the capacitor C3, one end of the inductor L2 and a negative electrode of the diode D1, a positive terminal of the diode D1 is connected to the ground end of the capacitor C2, the other end of the inductor L2 is connected to a DC5V output and is connected to the other end of the resistor R11 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the ground end of the capacitor C2, and the capacitor C6 is connected in parallel with a resistor R21; singlechip U7, be connected with electric capacity C7 between its 1 foot and 16 foot and 1 foot of chip U7 still connects to inductor L2's non-earthing terminal, 16 feet ground connection of chip U7, be connected with resistance R23 and the resistance R22 of establishing ties between 3 feet and the 5 feet of chip U7, ground connection on the circuit node between resistance R23 and the resistance R22, 12 feet of chip U7 are connected with resistance R26, the other end of resistance R26 connect resistance R25 respectively with the PWM port of adjusting luminance, the other end ground connection of resistance R25 just resistance R25 connects in parallel has electric capacity C4.
Furthermore, the control circuit device of the single chip U7 includes:
the VR2 knob switch resistor group is formed by connecting three or more than three first resistors in parallel, a switch is arranged at the grounding end of each first resistor, the non-grounding end of each first resistor is respectively connected with the resistor R20 and the DIM1-7 pin of the chip U7, and the other end of the resistor R20 is connected to the non-grounding end of the inductor L2;
and the VR3 knob switch resistor group is formed by connecting three or more than three second resistors in parallel, a switch is arranged at the grounding end of each second resistor, the non-grounding ends of the second resistors are respectively connected with the resistor R24 and the DIM2-9 pin of the chip U7, and the other end of the resistor R24 is connected to the non-grounding end of the inductor L2.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a what multi-functional LED drive circuit adopted is that piecewise linearity PWM adjusts luminance control chip utilizes thereby the sine wave different time voltage difference to realize lightening the spectrum that LED lamp pearl of different colours reaches the ideal.
The utility model discloses a multi-functional LED drive circuit adopts and increases simple step-down circuit on the linear power supply of main part and give the singlechip power supply, thereby realize knob switch dimming and knob switch cycle control function such as timing to singlechip and main part power integration an organic whole.
Drawings
Fig. 1 is a partial view 1 of the general view of the multifunctional LED driving circuit of the present invention.
Fig. 2 is a partial 2 diagram of the general diagram of the multifunctional LED driving circuit of the present invention.
Fig. 3 is a partial 3 diagram of the general diagram of the multifunctional LED driving circuit of the present invention.
Fig. 4 is a partial 4 diagram of the general diagram of the multifunctional LED driving circuit of the present invention.
Fig. 5 is a partial 5 diagram of the general diagram of the multifunctional LED driving circuit of the present invention.
Fig. 6 is a partial 6 diagram of the general diagram of the multifunctional LED driving circuit of the present invention.
Fig. 7 is the sine wave schematic diagram of the piecewise linear PWM dimming power supply of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention. It is to be understood that the embodiments described herein are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Please refer to fig. 1-4: the line a in fig. 1 is connected to the line a in fig. 2, the line D in fig. 1 is connected to the line D in fig. 2, the line B in fig. 1 is connected to the line B in fig. 3, the line C in fig. 1 is connected to the line C in fig. 3, the line E in fig. 1 is connected to the line E in fig. 3, the line F in fig. 3 is connected to the line F in fig. 4, and after the circuits in fig. 1-4 are connected, the circuits in fig. 5 and 6 constitute a general diagram of the multifunctional LED driving circuit of the present invention.
Example 1: the utility model discloses a concrete structure as follows:
the utility model discloses a multi-functional LED drive circuit, this multi-functional LED drive circuit insert alternating current power supply, and alternating current power supply's L line and N line respectively connect two parallelly connected fuses, and this multi-functional LED drive circuit includes:
the input end of the piecewise linear PWM dimming power supply is connected with an alternating current power supply output by a fuse, and different voltages controlled and output by sine waves at different time are utilized to light LED lamp beads with different colors; as shown in fig. 7, different time periods correspond to different voltages, four groups of LED lamp beads correspond to different voltages, and when the corresponding voltage values are reached, the LED lamp beads of the group are turned on;
the power supply end of the single chip U7 is connected with a constant voltage circuit, and the constant voltage circuit is connected to an alternating current power supply with the input end connected with the alternating current power supply output by the fuse.
In a preferred embodiment of this embodiment, the piecewise linear PWM dimming power supply includes a piecewise linear PWM dimming circuit, and the piecewise linear PWM dimming circuit includes:
a pin 1 and a pin 3 of the bridge rectifier diode BD3 are respectively connected with an L line and an N line of an alternating current power supply passing through a fuse, and a piezoresistor RV1 is connected between the pin 1 and the N line of the bridge rectifier diode BD 3;
a first resistor group formed by connecting a resistor R13, a resistor R14 and a resistor R15 in series, wherein two ends of the first resistor group are respectively connected to the pin 2 of the bridge rectifier diode BD3 and the pin 4 of the bridge rectifier diode BD 3;
a second resistor group formed by connecting a resistor R18, a resistor R16, a resistor R19 and a resistor R17 in series, wherein one end of the second resistor group is connected to pin 2 of the bridge rectifier diode BD 3;
the device comprises a control chip U1, a control chip U2 and a control chip U3, wherein a VDD pin of the control chip U1, a VDD pin of the control chip U2 and a VDD pin of the control chip U3 are connected with each other; the GND pin of the control chip U1, the GND pin of the control chip U2 and the GND pin of the control chip U3 are connected with each other; the MULT pin of the control chip U1, the MULT pin of the control chip U2 and the MULT pin of the control chip U3 are connected with each other; the DR1 pin of the control chip U1, the DR1 pin of the control chip U2 and the DR1 pin of the control chip U3 are connected with each other; the DR2 pin of the control chip U1, the DR2 pin of the control chip U2 and the DR2 pin of the control chip U3 are connected with each other; the DR4 pin of the control chip U1, the DR4 pin of the control chip U2 and the DR4 pin of the control chip U3 are connected with each other; the VDD pin of the control chip U1 is connected with a capacitor C5, the VDD pin of the control chip U1 is also connected to the other end of the second resistor group, the other end of the capacitor C5 is connected to the pin 4 of the bridge rectifier diode BD3 and is grounded, the GND pin of the control chip U1 is connected to the ground end of the capacitor C5, the MULT pin of the control chip U1 is connected to a circuit node between the resistor R13 and the resistor R14, the CS pin of the control chip U1 is connected with a resistor R12, and the other end of the resistor R12 is connected to the ground end of the capacitor C5; a resistor R27 is connected between the CS pin of the control chip U2 and the GND pin of the control chip U2, a resistor R28 is connected between the CS pin of the control chip U3 and the GND pin of the control chip U3, a capacitor CS1 is connected between the GND pin of the control chip U3 and the DR4 pin of the control chip U3, and the control chip U1, the control chip U2 and the control chip U3 are all provided with PWM dimming ports which are connected with one another;
the light source comprises four light emitting diodes connected in series, the positive electrode input end of the light source is connected to a pin 2 of the bridge rectifier diode BD3, a pin DR1 of the control chip U1 is connected to a circuit node between a first light emitting diode and a second light emitting diode, a pin DR2 of the control chip U1 is connected to a circuit node between the second light emitting diode and a third light emitting diode, a pin DR3 of the control chip U1 is connected to a circuit node between the third light emitting diode and a fourth light emitting diode, and a pin DR4 of the control chip U1 is connected to the negative electrode end of the light source.
In a preferred embodiment of the present invention, the constant voltage circuit includes:
a pin 1 and a pin 3 of the bridge rectifier diode BD2 are respectively connected with an L line and an N line of an alternating current power supply after passing through a fuse;
a pin C of the buck control chip U6 is respectively connected to a pin 2 of the bridge rectifier diode BD2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, a pin 4 of the bridge rectifier diode BD2 is connected to a ground end of the capacitor C2, a pin FB of the chip U6 is connected to a resistor R11, a pin VDD of the chip U6 is connected to a capacitor C3, a pin GND of the chip U6 is respectively connected to the other end of the capacitor C3, one end of the inductor L2 and a negative electrode of the diode D1, a positive terminal of the diode D1 is connected to the ground end of the capacitor C2, the other end of the inductor L2 is connected to a DC5V output and is connected to the other end of the resistor R11 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the ground end of the capacitor C2, and the capacitor C6 is connected in parallel with a resistor R21; the single-chip microcomputer U7 is characterized in that a capacitor C7 is connected between a pin 1 and a pin 16 of the single-chip microcomputer U7, a pin 1 of the chip U7 is further connected to a non-grounded end of the inductor L2, a pin 16 of the chip U7 is grounded, a resistor R23 and a resistor R22 which are connected in series are connected between a pin 3 and a pin 5 of the chip U7, a circuit node between the resistor R23 and the resistor R22 is grounded, a pin 12 of the chip U7 is connected with a resistor R26, the other end of the resistor R26 is respectively connected with a resistor R25 and the PWM dimming port, the other end of the resistor R25 is grounded, and a capacitor C4 is connected in parallel with the resistor R25.
In a preferred technical solution of this embodiment, the control circuit device of the single chip microcomputer U7 includes:
the VR2 knob switch resistor group is formed by connecting three or more than three first resistors in parallel, a switch is arranged at the grounding end of each first resistor, the non-grounding end of each first resistor is respectively connected with the resistor R20 and the DIM1-7 pin of the chip U7, and the other end of the resistor R20 is connected to the non-grounding end of the inductor L2;
and the VR3 knob switch resistor group is formed by connecting three or more than three second resistors in parallel, a switch is arranged at the grounding end of each second resistor, the non-grounding ends of the second resistors are respectively connected with the resistor R24 and the DIM2-9 pin of the chip U7, and the other end of the resistor R24 is connected to the non-grounding end of the inductor L2.
The utility model discloses drive circuit adopts linear constant current power supply, and integrated miniwatt step-down constant voltage power supply and singlechip come control linear power supply to give and light and realize various control function simultaneously.
The utility model discloses a multi-functional LED drive circuit and traditional LED drive circuit difference:
conventional LED power adopts single way or multichannel constant current switch power supply to come the lamp pearl of lightening different colour wave bands and reach the spectrum of ideal, the utility model discloses a thereby piecewise linearity PWM adjusts luminance the power and utilizes the different time voltage of sine wave different to realize lightening the spectrum that different colours's LED lamp pearl reached the ideal.
In the dimming or timing control part, the conventional power supply adopts 0-10V dimming or additionally adds a control board to realize the functions of timing and the like. A simple voltage reduction constant voltage circuit is added on a main linear power supply to supply power to a single chip microcomputer, and the single chip microcomputer and the main power supply are integrated into a whole, so that control functions of knob dimming, knob cycle timing and the like are achieved.
Advantages and formation process:
the conventional LED power supply adopts a single-path or multi-path constant current switching power supply, a piecewise linear PWM dimming power supply is adopted, the output of the linear power supply is half sine wave voltage after bridge rectifier rectification, when the sine wave voltage rises, a certain value is used for lightening LED lamp beads with one path of color temperature, when the voltage further rises to a higher value, another path of LED lamp beads with different color wave bands is lightened, and the like, so that the needed spectrum is realized.
The dimming or timing control part adopts a simple and economical voltage reduction constant voltage circuit to supply power to the singlechip, so that the singlechip converts various control functions into PWM signals to a linear power supply of the main body, and the desired control functions, such as the functions of knob switch dimming, knob switch cycle timing and the like, are achieved.
The utility model discloses a multi-functional LED drive circuit's characteristics are simple economy reliably, and circuit structure is simple, easily control, and the cost of manufacture is low, therefore has very high engineering practical value.
The above description is only the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all the equivalent structures or equivalent processes that are used in the specification and drawings of the present invention can be directly or indirectly applied to other related technical fields, and all the same principles are included in the scope of the present invention.
Claims (4)
1. The utility model provides a multi-functional LED drive circuit, this multi-functional LED drive circuit inserts alternating current power supply, and alternating current power supply's L line and N line respectively connect two fuses that connect in parallel, its characterized in that, this multi-functional LED drive circuit includes:
the input end of the piecewise linear PWM dimming power supply is connected with an alternating current power supply output by a fuse, and LED lamp beads with different colors are lightened by using different voltages which are controlled and output by sine waves at different time;
the power supply end of the single chip U7 is connected with a constant voltage circuit, and the constant voltage circuit is connected to an alternating current power supply with the input end connected with the alternating current power supply output by the fuse.
2. The multifunctional LED driving circuit of claim 1, wherein the piecewise linear PWM dimming power supply comprises piecewise linear PWM dimming circuit, the piecewise linear PWM dimming circuit comprising:
a pin 1 and a pin 3 of the bridge rectifier diode BD3 are respectively connected with an L line and an N line of an alternating current power supply passing through a fuse, and a piezoresistor RV1 is connected between the pin 1 and the N line of the bridge rectifier diode BD 3;
a first resistor group formed by connecting a resistor R13, a resistor R14 and a resistor R15 in series, wherein two ends of the first resistor group are respectively connected to pin 2 of the bridge rectifier diode BD3 and pin 4 of the bridge rectifier diode BD 3;
a second resistor group formed by connecting a resistor R18, a resistor R16, a resistor R19 and a resistor R17 in series, wherein one end of the second resistor group is connected to pin 2 of the bridge rectifier diode BD 3;
the device comprises a control chip U1, a control chip U2 and a control chip U3, wherein a VDD pin of the control chip U1, a VDD pin of the control chip U2 and a VDD pin of the control chip U3 are connected with each other; the GND pin of the control chip U1, the GND pin of the control chip U2 and the GND pin of the control chip U3 are connected with each other; the MULT pin of the control chip U1, the MULT pin of the control chip U2 and the MULT pin of the control chip U3 are connected with each other; the DR1 pin of the control chip U1, the DR1 pin of the control chip U2 and the DR1 pin of the control chip U3 are connected with each other; the DR2 pin of the control chip U1, the DR2 pin of the control chip U2 and the DR2 pin of the control chip U3 are connected with each other; the DR4 pin of the control chip U1, the DR4 pin of the control chip U2 and the DR4 pin of the control chip U3 are connected with each other; a VDD pin of the control chip U1 is connected to a capacitor C5, the VDD pin of the control chip U1 is further connected to the other end of the second resistor group, the other end of the capacitor C5 is connected to the 4 pin of the bridge rectifier diode BD3 and grounded, the GND pin of the control chip U1 is connected to the ground terminal of the capacitor C5, a MULT pin of the control chip U1 is connected to a circuit node between the resistor R13 and the resistor R14, a CS pin of the control chip U1 is connected to a resistor R12, and the other end of the resistor R12 is connected to the ground terminal of the capacitor C5; a resistor R27 is connected between the CS pin of the control chip U2 and the GND pin of the control chip U2, a resistor R28 is connected between the CS pin of the control chip U3 and the GND pin of the control chip U3, a capacitor CS1 is connected between the GND pin of the control chip U3 and the DR4 pin of the control chip U3, and the control chip U1, the control chip U2 and the control chip U3 are all provided with PWM dimming ports which are connected with one another;
the LED lamp comprises a light source consisting of four LEDs connected in series, wherein the positive electrode input end of the light source is connected to a pin 2 of a bridge rectifier diode BD3, a pin DR1 of a control chip U1 is connected to a circuit node between a first LED and a second LED, a pin DR2 of the control chip U1 is connected to a circuit node between the second LED and a third LED, a pin DR3 of the control chip U1 is connected to a circuit node between the third LED and a fourth LED, and a pin DR4 of the control chip U1 is connected to the negative electrode end of the light source.
3. The multi-functional LED driving circuit according to claim 1, wherein the constant voltage circuit comprises:
a pin 1 and a pin 3 of the bridge rectifier diode BD2 are respectively connected with an L line and an N line of an alternating current power supply after passing through a fuse;
a pin C of the buck control chip U6 is respectively connected to a pin 2 of the bridge rectifier diode BD2 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, a pin 4 of the bridge rectifier diode BD2 is connected to a ground end of the capacitor C2, a pin FB of the chip U6 is connected to a resistor R11, a pin VDD of the chip U6 is connected to a capacitor C3, a pin GND of the chip U6 is respectively connected to the other end of the capacitor C3, one end of the inductor L2 and a negative electrode of the diode D1, a positive terminal of the diode D1 is connected to the ground end of the capacitor C2, the other end of the inductor L2 is connected to a DC5V output and is connected to the other end of the resistor R11 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the ground end of the capacitor C2, and the capacitor C6 is connected in parallel with a resistor R21; the single-chip microcomputer U7 is characterized in that a capacitor C7 is connected between a pin 1 and a pin 16 of the single-chip microcomputer U7, a pin 1 of the chip U7 is further connected to a non-grounded end of the inductor L2, a pin 16 of the chip U7 is grounded, a resistor R23 and a resistor R22 which are connected in series are connected between a pin 3 and a pin 5 of the chip U7, a circuit node between the resistor R23 and the resistor R22 is grounded, a pin 12 of the chip U7 is connected with a resistor R26, the other end of the resistor R26 is respectively connected with a resistor R25 and the PWM dimming port, the other end of the resistor R25 is grounded, and a capacitor C4 is connected in parallel with the resistor R25.
4. The multifunctional LED driving circuit according to claim 3, wherein the control circuit device of the single-chip U7 comprises:
the VR2 knob switch resistor group is formed by connecting three or more than three first resistors in parallel, a switch is arranged at the grounding end of each first resistor, the non-grounding end of each first resistor is respectively connected with the resistor R20 and a DIM1-7 pin of the chip U7, and the other end of the resistor R20 is connected to the non-grounding end of the inductor L2;
and the VR3 knob switch resistor group is formed by connecting three or more than three second resistors in parallel, a switch is arranged at the grounding end of each second resistor, the non-grounding ends of the second resistors are respectively connected with the resistor R24 and the DIM2-9 pin of the chip U7, and the other end of the resistor R24 is connected to the non-grounding end of the inductor L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122942630.9U CN217591143U (en) | 2021-11-26 | 2021-11-26 | Multifunctional LED driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122942630.9U CN217591143U (en) | 2021-11-26 | 2021-11-26 | Multifunctional LED driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN217591143U true CN217591143U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122942630.9U Active CN217591143U (en) | 2021-11-26 | 2021-11-26 | Multifunctional LED driving circuit |
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- 2021-11-26 CN CN202122942630.9U patent/CN217591143U/en active Active
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