CN218897315U - LED (light-emitting diode) color mixing control circuit - Google Patents
LED (light-emitting diode) color mixing control circuit Download PDFInfo
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- CN218897315U CN218897315U CN202222969182.6U CN202222969182U CN218897315U CN 218897315 U CN218897315 U CN 218897315U CN 202222969182 U CN202222969182 U CN 202222969182U CN 218897315 U CN218897315 U CN 218897315U
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Abstract
The utility model discloses an LED (light-emitting diode) color mixing control circuit, which relates to the field of LEDs, and comprises: the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module; the step-down rectifying and filtering module is used for converting 220V alternating current into direct current; the voltage control module is used for supplying working voltage to the LED working module; the LED working module is used for LED luminous illumination; the safety protection module is used for grounding leakage when the working current of the LED working module is overlarge; the feedback module is used for stabilizing the output voltage of the voltage control module; compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the MOS tube conduction frequency of the LED working module is controlled by PWM signals to adjust the luminous intensity of the three-color luminous tube, so that the purpose of free color mixing is achieved, the MOS tube voltage drop is small, and compared with resistance voltage regulation, the circuit energy consumption is smaller.
Description
Technical Field
The utility model relates to the field of LEDs, in particular to an LED color mixing control circuit.
Background
A light emitting diode, abbreviated as LED, is a commonly used light emitting device that emits light by energy released by recombination of electrons and holes, and thus can be used to make a light emitting diode. As indicator lights in circuits and instruments, or as a text or numerical display.
The existing LED color mixing is used for mixing colors of the luminous tube by adjusting the size of the resistor, and the resistor consumes unnecessary electric energy and needs improvement.
Disclosure of Invention
The utility model aims to provide an LED color mixing control circuit for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
an LED color mixing control circuit comprising:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the step-down rectifying and filtering module is used for converting 220V alternating current into direct current;
the voltage control module is used for supplying working voltage to the LED working module;
the LED working module is used for LED luminous illumination;
the safety protection module is used for grounding leakage when the working current of the LED working module is overlarge;
the feedback module is used for detecting the working current of the LED working module and stabilizing the output voltage of the voltage control module according to the working current;
the commercial power supply module is connected with the step-down rectifying and filtering module, the step-down rectifying and filtering module is connected with the voltage control module and the feedback module, the voltage control module is connected with the LED working module, the LED working module is connected with the safety protection module and the feedback module, and the feedback module is connected with the voltage control module.
As still further aspects of the utility model: the voltage control module comprises a resistor R1, a triode V1, a resistor R2 and a triode V6, wherein an emitter of the triode V1 is connected with one end of the resistor R1, the voltage reduction rectifying and filtering module, a collector of the triode V1 is connected with the LED working module, a base of the triode V1 is connected with the other end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is connected with the collector of the triode V6, a base of the triode V6 is connected with the feedback module, and an emitter of the triode V6 is grounded.
As still further aspects of the utility model: the LED working module comprises an inductor L2, a MOS tube V3, a MOS tube V4, a luminous tube D1, a luminous tube D2 and a luminous tube D3, wherein one end of the inductor L2 is connected with a voltage control module, the other end of the inductor L2 is connected with the D pole of the MOS tube V2, the D pole of the MOS tube V3 and the D pole of the MOS tube V4, the S pole of the MOS tube V2 is connected with the positive pole of the luminous tube D1, the S pole of the MOS tube V3 is connected with the positive pole of the luminous tube D2, the S pole of the MOS tube V4 is connected with the positive pole of the luminous tube D3, one end of the luminous tube D1 is connected with the negative pole of the luminous tube D2, the negative pole of the luminous tube D3, a safety protection module and a feedback module, and the other end of the resistance R3 is grounded.
As still further aspects of the utility model: the safety protection module comprises a diode D4, a triode V5 and a resistor R4, wherein the negative electrode of the diode D4 is connected with the collector electrode of the triode V5 and the LED working module, the positive electrode of the diode D4 is connected with one end of the resistor R4 and the base electrode of the triode V5, the other end of the resistor R4 is grounded, and the emitter electrode of the triode V5 is grounded.
As still further aspects of the utility model: the feedback module comprises a potentiometer RP1, a resistor R7, a resistor R8, a resistor R5, a resistor R6, an amplifier U1 and a capacitor C3, wherein one end of the potentiometer RP1 is connected with the buck rectifying and filtering module, the other end of the potentiometer RP1 is connected with one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R7 is grounded, the other end of the resistor R8 is connected with the same-phase end of the amplifier U1, the inverting end of the amplifier U1 is connected with one end of the capacitor C3 and one end of the resistor R5, the other end of the capacitor C3 is grounded, the other end of the resistor R5 is connected with the LED working module, the output end of the amplifier U1 is connected with one end of the resistor R6, and the other end of the resistor R6 is connected with the voltage control module.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the MOS tube conduction frequency of the LED working module is controlled by PWM signals to adjust the luminous intensity of the three-color luminous tube, so that the purpose of free color mixing is achieved, the MOS tube voltage drop is small, and compared with resistance voltage regulation, the circuit energy consumption is smaller.
Drawings
Fig. 1 is a schematic diagram of an LED color mixing control circuit.
Fig. 2 is a circuit diagram of an LED color mixing control circuit.
Fig. 3 is a pin diagram of LM 358.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
Referring to fig. 1, an LED color mixing control circuit includes:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the step-down rectifying and filtering module is used for converting 220V alternating current into direct current;
the voltage control module is used for supplying working voltage to the LED working module;
the LED working module is used for LED luminous illumination;
the safety protection module is used for grounding leakage when the working current of the LED working module is overlarge;
the feedback module is used for detecting the working current of the LED working module and stabilizing the output voltage of the voltage control module according to the working current;
the commercial power supply module is connected with the step-down rectifying and filtering module, the step-down rectifying and filtering module is connected with the voltage control module and the feedback module, the voltage control module is connected with the LED working module, the LED working module is connected with the safety protection module and the feedback module, and the feedback module is connected with the voltage control module.
In particular embodiments: 220V alternating current supplied by a live wire and a zero wire is introduced into the mains supply module, the voltage is reduced by the voltage reducing rectifying and filtering module through the transformer W, the voltage is rectified by the rectifier T, and the filtering processing is completed through a filtering circuit formed by the capacitor C1, the capacitor C2 and the inductor L1.
In this embodiment: referring to fig. 2, the voltage control module includes a resistor R1, a triode V1, a resistor R2, and a triode V6, wherein an emitter of the triode V1 is connected with one end of the resistor R1, the buck rectifying and filtering module, a collector of the triode V1 is connected with the LED working module, a base of the triode V1 is connected with the other end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is connected with the collector of the triode V6, a base of the triode V6 is connected with the feedback module, and an emitter of the triode V6 is grounded.
The conducting degree of the triode V1 determines the voltage output to the LED working module, the conducting degree of the triode V1 depends on the conducting degree of the triode V6, the conducting degree of the triode V6 depends on the output voltage of the feedback module, and the output voltage of the feedback module depends on the voltage of the LED working module, so that the voltage control module is matched with the feedback module, and the output voltage of the voltage control module is stable.
In this embodiment: referring to fig. 2, the led operating module includes an inductor L2, a MOS tube V3, a MOS tube V4, a light emitting tube D1, a light emitting tube D2, and a light emitting tube D3, wherein one end of the inductor L2 is connected to the voltage control module, the other end of the inductor L2 is connected to the D pole of the MOS tube V2, the D pole of the MOS tube V3, the D pole of the MOS tube V4, the S pole of the MOS tube V2 is connected to the positive pole of the light emitting tube D1, the S pole of the MOS tube V4 is connected to the positive pole of the light emitting tube D3, one end of the negative pole of the light emitting tube D1 is connected to the resistor R3, the negative pole of the light emitting tube D2, the safety protection module, and the feedback module, and the other end of the resistor R3 is grounded.
The on frequency of the MOS tube V2, the MOS tube V3 and the MOS tube V4 is adjusted by adjusting the duty ratio of the G pole PWM signals output to the MOS tube V2, the MOS tube V3 and the MOS tube V4, the luminous intensity of the luminous tube D1 (red light), the luminous tube D2 (green light) and the luminous tube D3 (blue light) is changed, and the light of any required color is obtained based on different light intensity combinations of the three optical primary colors.
In this embodiment: referring to fig. 2, the safety protection module includes a diode D4, a triode V5, and a resistor R4, wherein a negative electrode of the diode D4 is connected to a collector of the triode V5 and the LED operating module, a positive electrode of the diode D4 is connected to one end of the resistor R4 and a base of the triode V5, another end of the resistor R4 is grounded, and an emitter of the triode V5 is grounded.
When the current of the LED working module is overlarge, the voltage on the resistor R3 is larger, so that the voltage stabilizing diode D4 is broken down, the triode V5 is conducted, the grounding leakage is avoided, and the overlarge voltage is prevented from being output to the amplifier U1 of the feedback module, so that the amplifier U1 is damaged.
In this embodiment: referring to fig. 2 and 3, the feedback module includes a potentiometer RP1, a resistor R7, a resistor R8, a resistor R5, a resistor R6, an amplifier U1, and a capacitor C3, wherein one end of the potentiometer RP1 is connected to the buck rectifying filter module, the other end of the potentiometer RP1 is connected to one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R7 is grounded, the other end of the resistor R8 is connected to the in-phase end of the amplifier U1, the inverting end of the amplifier U1 is connected to one end of the capacitor C3 and one end of the resistor R5, the other end of the capacitor C3 is grounded, the other end of the resistor R5 is connected to the LED working module, the output end of the amplifier U1 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the voltage control module.
The model of the amplifier U2 is LM358, and the LM358 is a double operational amplifier, and two independent high-gain and internal frequency compensating operational amplifiers are arranged inside the amplifier.
When voltage fluctuation causes triode V1 to output the voltage increase for LED operation module, LED operation module's electric current increases for voltage increase on the resistance R3, amplifier U1's inverting terminal voltage increases, and amplifier U1 output's square wave signal's duty cycle increases, and triode V6's conduction frequency drops, and triode V1 output is for LED operation module's voltage when reducing, constitutes feedback regulation, and circuit output is for LED operation module's voltage stabilization.
The working principle of the utility model is as follows: the utility model provides a 220V alternating current is supplied with to the mains supply module, and the output is given step-down rectification filter module, and step-down rectification filter module turns into direct current with 220V alternating current, and voltage control module supplies operating voltage for LED operating module, and LED operating module LED illumination that shines, and when safety protection module LED operating module operating current was too big, ground connection leakage, feedback module detected the operating current of LED operating module, stabilizes voltage control module's output voltage according to this electric current.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. An LED color mixing control circuit is characterized in that:
the LED color mixing control circuit comprises:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the step-down rectifying and filtering module is used for converting 220V alternating current into direct current;
the voltage control module is used for supplying working voltage to the LED working module;
the LED working module is used for LED luminous illumination;
the safety protection module is used for grounding leakage when the working current of the LED working module is overlarge;
the feedback module is used for detecting the working current of the LED working module and stabilizing the output voltage of the voltage control module according to the working current;
the commercial power supply module is connected with the step-down rectifying and filtering module, the step-down rectifying and filtering module is connected with the voltage control module and the feedback module, the voltage control module is connected with the LED working module, the LED working module is connected with the safety protection module and the feedback module, and the feedback module is connected with the voltage control module.
2. The LED color mixing control circuit of claim 1, wherein the voltage control module comprises a resistor R1, a triode V1, a resistor R2, and a triode V6, the emitter of the triode V1 is connected with one end of the resistor R1, the collector of the triode V1 is connected with the LED working module, the base of the triode V1 is connected with the other end of the resistor R1, one end of the resistor R2, the other end of the resistor R2 is connected with the collector of the triode V6, the base of the triode V6 is connected with the feedback module, and the emitter of the triode V6 is grounded.
3. The LED color mixing control circuit according to claim 1, wherein the LED operating module comprises an inductor L2, a MOS tube V3, a MOS tube V4, a light emitting tube D1, a light emitting tube D2, and a light emitting tube D3, one end of the inductor L2 is connected to the voltage control module, the other end of the inductor L2 is connected to the D pole of the MOS tube V2, the D pole of the MOS tube V3, the D pole of the MOS tube V4, the S pole of the MOS tube V2 is connected to the positive pole of the light emitting tube D1, the S pole of the MOS tube V4 is connected to the positive pole of the light emitting tube D3, one end of a negative pole connecting resistor R3 of the light emitting tube D1, the negative pole of the light emitting tube D2, the safety protection module, and the feedback module, and the other end of the resistor R3 is grounded.
4. The LED color mixing control circuit of claim 1, wherein the safety protection module comprises a diode D4, a triode V5, and a resistor R4, wherein the negative electrode of the diode D4 is connected with the collector of the triode V5 and the LED operating module, the positive electrode of the diode D4 is connected with one end of the resistor R4 and the base of the triode V5, the other end of the resistor R4 is grounded, and the emitter of the triode V5 is grounded.
5. The LED color mixing control circuit according to claim 3, wherein the feedback module comprises a potentiometer RP1, a resistor R7, a resistor R8, a resistor R5, a resistor R6, an amplifier U1, and a capacitor C3, wherein one end of the potentiometer RP1 is connected to the buck rectification filter module, the other end of the potentiometer RP1 is connected to one end of the resistor R7 and one end of the resistor R8, the other end of the resistor R7 is grounded, the other end of the resistor R8 is connected to the in-phase end of the amplifier U1, the inverting end of the amplifier U1 is connected to one end of the capacitor C3 and one end of the resistor R5, the other end of the capacitor C3 is grounded, the other end of the resistor R5 is connected to the LED operation module, the output end of the amplifier U1 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the voltage control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222969182.6U CN218897315U (en) | 2022-11-08 | 2022-11-08 | LED (light-emitting diode) color mixing control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222969182.6U CN218897315U (en) | 2022-11-08 | 2022-11-08 | LED (light-emitting diode) color mixing control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218897315U true CN218897315U (en) | 2023-04-21 |
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|---|---|---|---|
| CN202222969182.6U Active CN218897315U (en) | 2022-11-08 | 2022-11-08 | LED (light-emitting diode) color mixing control circuit |
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| CN (1) | CN218897315U (en) |
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- 2022-11-08 CN CN202222969182.6U patent/CN218897315U/en active Active
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