CN217741945U - Color temperature adjusting control circuit based on 555 chip - Google Patents

Abstract

The utility model relates to a mixing of colors temperature control circuit based on 555 chips, include: a 555 chip module; the charge and discharge module is electrically connected to the 555 chip module; wherein, the charge-discharge module includes: the charging module is electrically connected to the 555 chip module; one end of the discharging module is electrically connected to the charging module, and the other end of the discharging module is electrically connected to the 555 chip module; and one end of the peripheral circuit module is electrically connected to the charging module, and the other end of the peripheral circuit module is electrically connected to the discharging module. The utility model provides a mixing of colors temperature control circuit based on 555 chips should be mixed colors temperature control circuit and be used for the LED light, and this colour temperature regulation partial circuit reduces original 1/3, and the material is no longer in short supply simultaneously.

Description

Color temperature adjusting control circuit based on 555 chip

Technical Field

The utility model relates to a LED lighting circuit technical field especially relates to a mixing of colors temperature control circuit based on 555 chips.

Background

In order to reduce stock SKUs (types and models) in the lighting market, the lamp with adjustable color temperature is increasingly widely required, and the color temperature of the lamp is mainly modulated by a single chip Microcomputer (MCU) scheme and a resistance current limiting scheme in the market at present. Wherein the MCU scheme leads to the stock difficulty because the core lacks in two years nearly, the price rises, resistance current-limiting scheme also exists as alternative and is applicable to the miniwatt lamps and lanterns that are less than 20W, after lamps and lanterns power grow, output current grow, lead to the power loss increase on resistance, be unfavorable for hot control and lamps and lanterns light efficiency can reduce too much and middle colour temperature colour tolerance is difficult to control, the precision requirement very high shortcoming to lamp pearl festival voltage drop VF, especially to many grades of power adjustable lamps and lanterns, resistance current-limiting scheme control degree of difficulty increases, the production management and control is complicated, be unfavorable for production efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above problem that prior art exists, provide a mixing of colors temperature control circuit based on 555 chips.

In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a following technical scheme realizes:

the utility model provides a mixing of colors temperature control circuit based on 555 chip, include:

a 555 chip module; and

the charge-discharge module is electrically connected to the 555 chip module;

wherein, the charge-discharge module includes:

the charging module is electrically connected to the 555 chip module;

one end of the discharging module is electrically connected to the charging module, and the other end of the discharging module is electrically connected to the 555 chip module; and

and one end of the peripheral circuit module is electrically connected to the charging module, and the other end of the peripheral circuit module is electrically connected to the discharging module.

In an embodiment of the present invention, eight pins are disposed on the 555 chip module.

In an embodiment of the present invention, the eight pins include a GND pin, and the GND pin is grounded.

In an embodiment of the present invention, the charging module includes:

one end of the resistor R1 is connected with the 555 chip module, and the other end of the resistor R1 is connected with the switch and the discharging module;

one end of the resistor Rupper is connected with the resistor R1;

one end of the switch is connected with the resistor Rupper; and

and one end of the diode D1 is connected with the switch, and the other end of the diode D1 is connected with the 555 chip module.

In an embodiment of the present invention, the discharging module includes:

one end of the resistor Rlower is connected with the switch;

one end of the resistor R2 is connected with the resistor Rlower; and

and one end of the diode D2 is connected with the resistor R2, and the other end of the diode D2 is connected with the 555 chip module.

In an embodiment of the present invention, the peripheral circuit includes:

a power supply V1;

one end of the capacitor C1 is connected with the resistor R1 and the positive electrode of the power supply V1, and the other end of the capacitor C1 is connected with the negative electrode of the power supply V1;

the capacitor C3 is electrically connected to the capacitor C1, the diode D2 and the 555 chip module; and

and one end of the capacitor C2 is connected with the capacitor C3, and the other end of the capacitor C2 is connected with the 555 chip module.

In an embodiment of the present invention, the color temperature control circuit further includes a pulse width modulation complementary module electrically connected to the 555 chip module.

The utility model provides a mixing of colors temperature control circuit based on 555 chip should be mixed colors temperature control circuit and be used for the LED light, chooses for use the 555 chip for use, and the charge-discharge route uses the diode to separate, can realize the adjustable change of duty cycle. Specifically, during charging, pin VCC passes through resistance R1, resistance Rupper, and diode D1 charges for electric capacity C3, during discharging, through resistance R2, resistance Rlower, diode D2 discharges for electric capacity C3, and adjusting resistance Rupper and resistance Rlower just can change the time proportion of charging and discharging, has produced the PWM (pulse width) of different duty cycles promptly, and this colour temperature regulation partial circuit reduces to original 1/3, and the material no longer lacks in short supply simultaneously.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is an overall circuit diagram of the present invention;

fig. 2 is a simulation waveform diagram of the PWM generator of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1, the utility model provides a pair of mixing of colors temperature control circuit based on 555 chips can be used to the LED light, adjusts the colour temperature of LED light. In an embodiment of the present invention, the color temperature control circuit includes a 555 chip module, a charge-discharge module and a pulse width modulation complementary module. Specifically, eight pins are arranged on the 555 chip module, the eight pins are respectively a pin GND, a pin TRIG, a pin OUT, a pin RST, a pin VCC, a pin DIS, a pin THRS and a pin CV, and the pin GND is grounded.

Referring to fig. 1, in an embodiment of the present invention, the charging/discharging module includes a charging module, a discharging module, and a peripheral circuit module. Specifically, the charging module is electrically connected to the 555 chip module. The charging module comprises a resistor R1, a resistor Rupper, a switch and a diode D1, one end of the resistor R1 is connected with a pin Vcc and a pin RST, the other end of the resistor R1 is connected with one end of the resistor Rupper, the other end of the resistor Rupper is connected with the switch and a discharging module, one end of the switch is connected with one end of the diode D1, one end of the diode D1 is connected with a pin DIS, and the other end of the diode D1 is connected with a pin TRIG. One end of the discharging module is electrically connected to the charging module, and the other end of the discharging module is electrically connected to the 555 chip module. Specifically, the discharging module comprises a resistor Rlower, a resistor R2 and a diode D2, one end of the resistor Rlower is connected with the switch, the other end of the resistor Rlower is connected with one end of the resistor R2, the other end of the resistor R2 is connected with one end of the diode D2, and the other end of the diode D2 is connected with the pin TRIG. One end of the peripheral circuit module is electrically connected to the charging module, and the other end of the peripheral circuit module is electrically connected to the discharging module. Specifically, the peripheral circuit includes power V1, electric capacity C3 and electric capacity C2, electric capacity C1's one end and resistance R1 and power V1's anodal connection, electric capacity C1's the other end and electric capacity C3 and power V1's negative pole are connected the back ground connection, electric capacity C3's wherein one end is connected with diode D2, electric capacity C3's wherein one end is connected with pin THRS, electric capacity C3's the other end and electric capacity C2's one end are connected, electric capacity C2's the other end and pin CV are connected.

Referring to fig. 1, in an embodiment of the present invention, the pulse width modulation complementary module includes a resistor R4, a capacitor C4, a resistor R11, a field effect transistor Q1, a diode D3, a diode D4, a field effect transistor Q2, a resistor R7, a capacitor C5, and a resistor R6, specifically, one end of the resistor R4 is connected to the pin OUT, the other end of the resistor R4 is connected to the capacitor C4, the capacitor C4 is connected in parallel to the resistor R11, one end of the resistor R11 is connected to the field effect transistor Q1, and the other end of the resistor R11 is grounded. The other end of the field effect transistor Q1 is connected to a diode D3 and a resistor R6, and one end of the diode D3 is connected to a diode D4. The other end of the resistor R6 is connected with the resistor R7 and the capacitor C5, one end of the resistor R7 is connected with the field effect transistor Q2, the other end of the field effect transistor Q2 is connected with the diode D4, and one end of the diode D4 is connected with the ammeter I2 and then grounded.

Referring to fig. 1, in an embodiment of the present invention, a 555 chip is selected, and the charging and discharging paths are separated by diodes, so that the duty ratio can be adjusted. Specifically, during charging, the pin VCC charges the capacitor C3 through the resistor R1, the resistor Rupper, and the diode D1. During discharging, the capacitor C3 is discharged through the resistor R2, the resistor Rlower and the diode D2. By adjusting the resistor Rupper and the resistor Rlower, the time ratio of charging and discharging can be changed, i.e. PWM (pulse width) with different duty ratios is generated.

Referring to fig. 1 and 2, in an embodiment of the present invention, VCC is equal to 12V, px1 replaces Rupper and Px2 replaces Rlower respectively to form a group, 5 groups of calculations (5-step color temperature design) are selected, where x is 1-5, duty is duty ratio, and the settlement result is as follows:

to sum up, the utility model provides a mixing of colors temperature control circuit based on 555 chip should be mixed colors temperature control circuit and be used for the LED light on, choose the 555 chip for use, and charge-discharge path uses the diode to separate, can realize the adjustable change of duty cycle. Specifically, during charging, the pin VCC charges the capacitor C3 through the resistor R1, the resistor Rupper, and the diode D1. During discharging, the capacitor C3 is discharged through the resistor R2, the resistor Rlower and the diode D2. By adjusting the resistor Rupper and the resistor Rlower, the time proportion of charging and discharging can be changed, that is, PWM (pulse width) with different duty ratios is generated, the color temperature adjusting part circuit is reduced to 1/3 of the original circuit, meanwhile, the materials are not in short supply, the color temperature adjusting effect is consistent with the MCU scheme, and simultaneously, the links of software writing and code burning are saved, as can be seen from fig. 2, for example, the duty ratio calculated by the calculation book on the second-gear parameter is 30.2%, the frequency is 964Hz, the simulated duty ratio is 30.5%, the frequency is 965Hz, and the frequency is basically consistent, so that the accuracy of the circuit is verified.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims (7)

1. A color temperature control circuit based on a 555 chip is characterized by comprising:

a 555 chip module; and

the charge-discharge module is electrically connected to the 555 chip module;

wherein, the charge-discharge module includes:

the charging module is electrically connected to the 555 chip module;

one end of the discharging module is electrically connected to the charging module, and the other end of the discharging module is electrically connected to the 555 chip module; and

and one end of the peripheral circuit module is electrically connected to the charging module, and the other end of the peripheral circuit module is electrically connected to the discharging module.

2. The color temperature control circuit according to claim 1, wherein: eight pins are arranged on the 555 chip module.

3. The color temperature control circuit according to claim 2, wherein: the eight pins include a GND pin, and the GND pin is grounded.

4. The color temperature control circuit according to claim 1, wherein: the charging module includes:

one end of the resistor R1 is connected with the 555 chip module, and the other end of the resistor R1 is connected with the switch and the discharging module;

one end of the resistor Rupper is connected with the resistor R1;

one end of the switch is connected with the resistor Rupper; and

and one end of the diode D1 is connected with the switch, and the other end of the diode D1 is connected with the 555 chip module.

5. The color temperature control circuit according to claim 4, wherein: the discharge module includes:

one end of the resistor Rlower is connected with the switch;

one end of the resistor R2 is connected with the resistor Rlower; and

and one end of the diode D2 is connected with the resistor R2, and the other end of the diode D2 is connected with the 555 chip module.

6. The color temperature control circuit according to claim 5, wherein: the peripheral circuit includes:

a power supply V1;

one end of the capacitor C1 is connected with the resistor R1 and the positive electrode of the power supply V1, and the other end of the capacitor C1 is connected with the negative electrode of the power supply V1;

the capacitor C3 is electrically connected to the capacitor C1, the diode D2 and the 555 chip module; and

and one end of the capacitor C2 is connected with the capacitor C3, and the other end of the capacitor C2 is connected with the 555 chip module.

7. The color temperature control circuit according to claim 1, wherein: the color temperature adjusting control circuit further comprises a pulse width modulation complementary module, and the pulse width modulation complementary module is electrically connected to the 555 chip module.

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