CN217936028U

CN217936028U - Dimming circuit based on 4KA514

Info

Publication number: CN217936028U
Application number: CN202221881649.5U
Authority: CN
Inventors: 李喆; 贲贵黄; 李慧颍; 巫中伟; 何素东
Original assignee: Shanghai Shizhen Microelectronics Co ltd
Current assignee: Shanghai Shizhen Microelectronics Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-29
Anticipated expiration: 2032-07-20

Abstract

The utility model discloses a dimming circuit based on 4KA514, which relates to the technical field of dimming control, and comprises a power module for providing electric energy; the power supply adjusting module is used for processing electric energy; the trigger module is used for outputting a trigger signal; the delay control module is used for outputting a control signal in a delay way; the selection control module is used for selecting a control mode; the integrated control module is used for carrying out dimming control through the 4KA 514; the isolation dimming module is used for isolation dimming; and the indicating module is used for indicating work. The utility model discloses dimmer circuit based on 4KA514 adopts 4KA514 as this dimmer circuit's main control chip, and trigger module adjusts luminance change, adopts time delay control module to carry out time delay control to dimmer circuit, realizes closing the time delay of adjusting brightness to adopt to keep apart dimmer module and carry out isolation control to the electrical apparatus that needs the light modulation, avoid the electrical apparatus to the interference of integrated control module and lead to the decline of the precision of adjusting luminance.

Description

Dimming circuit based on 4KA514

Technical Field

The utility model relates to a dimming control technical field specifically is dimming circuit based on 4KA 514.

Background

At present, various lighting devices have become necessities of people's life, along with the attention of people to energy conservation, a dimming lamp circuit is generated, people can realize the light requirements of various scenes through the adjustment of the dimming circuit, meanwhile, along with the development of science and technology, the dimming circuit is also developed towards the direction of intellectualization, the dimming of the circuit is realized by generally adopting a touch control mode at present, specifically, the required brightness is switched by continuously touching a touch switch, and the adjustment of the lamp is driven by an integrated circuit such as 4KA514, when the dimming circuit is controlled, the integrated circuit and the lamp are directly controlled by a thyristor and are easily influenced by a load end, and the intelligence degree of the dimming circuit is not high due to single touch dimming, so the improvement is needed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a dimmer circuit based on 4KA514 to solve the problem that proposes in the above-mentioned background art.

According to the embodiment of the utility model provides an in, provide the dimming circuit based on 4KA514, this dimming circuit based on 4KA514 includes: the device comprises a power supply module, a power supply adjusting module, a triggering module, a time delay control module, a selection control module, a zero-crossing detection module, an integrated control module, an isolation dimming module and an indication module;

the power supply module is used for providing electric energy required by the circuit;

the power supply adjusting module is connected with the power supply module, the delay control module and the integrated control module, and is used for reducing the voltage of the output electric energy and carrying out rectification, filtering and DC-DC conversion processing on the reduced voltage;

the trigger module is used for outputting a trigger signal through the touch switch;

the delay control module is connected with the trigger module and used for receiving the trigger signal output by the trigger module and outputting a control signal in a delayed manner;

the selection control module is connected with the trigger module and the integrated control module, is used for controlling the trigger module to be directly connected with the integrated control module, is connected with the delay control module, and is used for controlling the delay control module to be connected with the integrated control module;

the zero-crossing detection module is connected with the power supply module and the integrated control module and is used for carrying out zero-crossing detection on the power supply module and outputting a detection signal;

the integrated control module is used for receiving the signals output by the trigger module, the delay control module and the zero-crossing detection module through the 4KA514 and outputting pulse signals;

the isolation dimming module is connected with the integrated control module and used for receiving the driving signal output by the integrated control module and carrying out isolation dimming;

and the indicating module is connected with the integrated control module and used for receiving the driving signal output by the integrated control module and controlling the work of the indicating lamp.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses dimmer circuit based on 4KA514 adopts 4KA514 as this dimmer circuit's main control chip, can be by the change of trigger module through touch switch regulation luminance, and adopt time delay control module to carry out time delay control to dimmer circuit, the realization is closed absolutely to adjusting bright time delay, improve dimmer circuit's intelligence, and adopt and keep apart the dimmer module and carry out isolation control to the electrical apparatus that needs adjust luminance, avoid the electrical apparatus to lead to the decline of the precision of adjusting luminance to integrated control module's interference, and this dimmer circuit is simple and easy, and is low in cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic block diagram of a 4KA 514-based dimming circuit provided by an example of the present invention.

Fig. 2 is a circuit diagram of a 4KA 514-based dimming circuit provided by an example of the present invention.

Fig. 3 is a schematic diagram of a functional pin of 4KA514 according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, 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.

The dimming circuit based on 4KA514 comprises: the system comprises a power supply module 1, a power supply adjusting module 2, a triggering module 3, a time delay control module 4, a selection control module 5, a zero-crossing detection module 6, an integrated control module 7, an isolation dimming module 8 and an indication module 9;

specifically, the power module 1 is used for providing electric energy required by a circuit;

the power supply adjusting module 2 is connected with the power supply module 1, the delay control module 4 and the integrated control module 7, and is used for reducing the voltage of the output electric energy and carrying out rectification, filtering and DC-DC conversion processing on the reduced voltage;

the trigger module 3 is used for outputting a trigger signal through the touch switch P1;

the delay control module 4 is connected with the trigger module 3 and is used for receiving the trigger signal output by the trigger module 3 and outputting a control signal in a delayed manner;

the selection control module 5 is connected with the trigger module 3 and the integrated control module 7, is used for controlling the trigger module 3 to be directly connected with the integrated control module 7, is connected with the delay control module 4, and is used for controlling the delay control module 4 to be connected with the integrated control module 7;

the zero-crossing detection module 6 is connected with the power module 1 and the integrated control module 7 and is used for performing zero-crossing detection on the power module 1 and outputting a detection signal;

the integrated control module 7 is configured to receive the signals output by the trigger module 3, the delay control module 4 and the zero-crossing detection module 6 through the 4KA514 and output a pulse signal;

the isolation dimming module 8 is connected with the integrated control module 7 and is used for receiving the driving signal output by the integrated control module 7 and performing isolation dimming;

and the indicating module 9 is connected with the integrated control module 7 and is used for receiving the driving signal output by the integrated control module 7 and controlling the work of an indicating lamp.

In a specific embodiment, the power module 1 may use a commercial voltage power supply to provide ac power; the power supply regulating module 2 can adopt an RC voltage reduction circuit, a rectification filter circuit and a DC-DC conversion circuit to process the input alternating current; the trigger module 3 may adopt, but is not limited to, a touch switch P1, a touch screen switch, and other switches that output a trigger signal; the delay control module 4 can adopt a delay circuit to realize the delay control of the circuit; the selection control module 5 only needs to adopt a selection switch; the zero-crossing detection module 6 can adopt a sampling resistor and a capacitor and is matched with the integrated control module 7 to realize zero-crossing detection of the power module 1; the integrated control module 7 can adopt a 4KA514 chip as a main controller of the dimming circuit; the isolation dimming module 8 can adopt a photoelectric isolation circuit to isolate dimming; the indicating module 9 may be an indicating lamp circuit.

In this embodiment, referring to fig. 2 and fig. 3, the power module 1 includes an AC power supply AC, a ninth resistor R9, a third diode D3, a first voltage regulator VD1, and an eighth capacitor C8; the power supply regulating module 2 comprises a third resistor R3, a fifth capacitor C5, a rectifier G1, a fourth capacitor C4 and a DC-DC converter U3;

specifically, a first end of the alternating current power supply AC is connected to an anode of a third diode D3 through a ninth resistor R9, a cathode of the third diode D3 is connected to a cathode of the first voltage regulator tube VD1, one end of the eighth capacitor C8, one end of the fifth capacitor C5 and one end of the third resistor R3, an anode of the first voltage regulator tube VD1 is connected to a second end of the alternating current power supply AC, the other end of the eighth capacitor C8 and a third end of the rectifier G1, the other end of the third resistor R3 and the other end of the fifth capacitor C5 are both connected to a first end of the rectifier G1, a second end of the rectifier G1 is connected to one end of the fourth capacitor C4 and the ground, and a fourth end of the rectifier G1 is connected to the other end of the fourth capacitor C4 and the input end of the DC-DC converter U3.

In a specific embodiment, the AC power source AC may be a commercial voltage power source; the rectifier G1 can be selected to be full-bridge rectification; the DC-DC converter U3 may be a converter with an output of 5V, and the specific type is not limited.

Further, the trigger module 3 includes a touch switch P1, a first capacitor C1, a second capacitor C2, and a second resistor R2; the selection control module 5 comprises a first selection switch S1;

specifically, the output end of the touch switch P1 is connected to the third end of the selector switch sequentially through the first capacitor C1 and the second capacitor C2, and the first end of the selector switch is connected to the first end of the second resistor R2.

Further, the delay control module 4 includes a first resistor R1, a third capacitor C3, and a timer U2;

specifically, the fourth end and the eighth end of the timer U2 are both connected to the output end of the DC-DC converter U3 and one end of the first resistor R1, the seventh end and the sixth end of the timer U2 are both connected to the other end of the first resistor R1 and one end of the third capacitor C3, the other end of the third capacitor C3 and the first end of the timer U2 are both grounded, and the third end of the timer U2 is connected to the second end of the first selection switch S1.

In a particular embodiment; the first selection switch S1 may be a single-pole double-throw switch; the timer U2 can be a 555 series timer U2.

Further, the integrated control module 7 includes a first diode D1, a second diode D2, a second selection switch S2, an eleventh resistor R11, and an integrated chip U1; the zero-crossing detection module 6 comprises a ninth capacitor C9 and a tenth resistor R10;

specifically, the fourth end of the integrated chip U1, the cathode of the first diode D1, and the anode of the second diode D2 are all connected to the second end of the second resistor R2, the fifth end of the integrated chip U1 is connected to the first end of the rectifier G1, the seventh end of the integrated chip U1 is connected to the anode of the first diode D1 and the third end of the rectifier G1, the sixth end of the integrated chip U1 is connected to the first end of the second selector switch S2, the second end of the second selector switch S2 is connected to the seventh end of the integrated chip U1, the fourth end of the second selector switch S2 is suspended, the third end of the second selector switch S2 is connected to the third end of the integrated chip U1, the cathode of the second diode D2, one end of the eleventh resistor R11, and the cathode of the third diode D3, the other end of the eleventh resistor R11 is connected to the first end of the integrated chip U1, the second end of the integrated chip U1 is connected to one end of the ninth capacitor C9 and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the first AC voltage regulator tube, and the first AC voltage regulator tube is connected to the ninth capacitor VD 1.

Further, the isolation dimming module 8 includes a sixth capacitor C6, an optocoupler U5, a fifth resistor R5, a first power VCC1, a seventh resistor R7, a sixth resistor R6, a thyristor SCR, an eighth resistor R8, a seventh capacitor C7, and a dimming lamp LED2;

specifically, the third end of the optocoupler U5 is connected with the eighth end of the integrated chip U1 through a sixth capacitor C6, the fourth end of the optocoupler U5 is connected with a first power VCC1 through a fifth resistor R5, the first end of the integrated signal is connected with one end of a thyristor SCR, one end of an eighth resistor R8 and one end of a dimming lamp LED2 through a sixth resistor R6, the other end of the thyristor SCR is connected with one end of a seventh resistor R7, one end of a seventh capacitor C7 and the second end of the AC power supply AC, the other end of the dimming lamp LED2 is connected with the first end of the AC power supply AC, the other end of the seventh resistor R7 and the control end of the thyristor SCR are connected with the second end of the optocoupler U5, and the other end of the seventh capacitor C7 is connected with the other end of the eighth resistor R8.

Further, the indication module 9 includes an inverter U4, a fourth resistor R4, and a first indicator light LED1;

specifically, the input end of the phase inverter U4 is connected to the eighth end of the integrated chip U1, the output end of the phase inverter U4 is connected to the anode of the first indicator light LED1 through the fourth resistor R4, and the cathode of the first indicator light LED1 is grounded.

In an embodiment, the integrated chip U1 is a 4KA514 chip, specifically, a first terminal of the integrated chip U1, an internal capacitor and an oscillator stage generate a clock, and an external resistance value determines a generated brightness level, a second terminal is a zero-crossing detection terminal, a third terminal is a positive power voltage application terminal, a fourth terminal is a lamp surface or touch panel touch sensing input, a fifth terminal is an AGC loop determination control feedback, a sixth terminal is three dimming state input terminals, a seventh terminal is a power voltage negative terminal, and an eighth terminal is a pulse output terminal; the second selection switch S2 is a single-pole double-throw switch; the optocoupler U5 can be an MOC3021 photocoupler; the thyristor SCR can be selected from Q4004L4.

The utility model discloses a dimming circuit based on 4KA514, provide the alternating current through power module 1, power module 2 steps down the alternating current, the rectification, the filtering is good and the DC-DC handles, integrated control module 7 is through receiving the trigger signal that trigger module 3 exported so as to control the work of keeping apart dimming module 8, specifically, when the third end and the first end of first select switch S1 in the selection control module 5 are connected, integrated control module 7 is directly controlled by trigger module 3, the trigger signal of output passes through first diode D1 and second diode D2 clamper so that integrated chip U1 receives, integrated chip U1 exports a negative pulse signal through its eighth end, so as to control the conduction of opto-coupler U5 and thyristor SCR in proper order, dimming lamp LED2 begins to work, the opposite phase is carried out the negative pulse of inverting phase pair input and is exported the positive pulse and then control the work of first pilot lamp LED1, and when the touch switch P1 is touched again, the conduction angle of the thyristor SCR changes so as to change the brightness of the dimming lamp LED2, the brightness adjusting mode depends on the connection mode of the sixth end of the integrated chip U1, the sequence of dark light, medium light, bright light and extinction is changed in sequence when the sixth end of the integrated chip U1 is suspended, the sequence of dark light, medium light, high and medium light, bright light and extinction is changed when the sixth end of the integrated chip U1 is connected to the third end, the sequence of bright light, medium light and dark light is changed when the sixth end of the integrated chip U1 is connected to the seventh end, when time delay control is needed, the first end and the second end of the first selector switch S1 are connected, the timer U2 receives a signal output by the touch switch P1, the timer U2 outputs a control signal to the integrated chip U1 when the touch switch U1 controls the dimming lamp LED2 to work, the dimming lamp LED2 is turned off after a period of time delay, the dimming lamp LED2 starts to work at another brightness after being pressed again, the dimming lamp LED2 is turned off after a period of time delay, the change of the brightness is controlled according to the connection mode of the sixth end, the isolation dimming module 8 is adopted to conduct isolation control on the electric appliance needing dimming, the reduction of dimming precision caused by the interference of the electric appliance on the integrated control module 7 is avoided, and the dimming circuit is simple and easy to implement and low in cost.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. 4KA514 based dimming circuit,

the dimming circuit based on 4KA514 comprises: the device comprises a power supply module, a power supply adjusting module, a triggering module, a time delay control module, a selection control module, a zero-crossing detection module, an integrated control module, an isolation dimming module and an indication module;

the power supply adjusting module is connected with the power supply module, the delay control module and the integrated control module, and is used for reducing the voltage of output electric energy and carrying out rectification, filtering and DC-DC conversion processing on the reduced voltage;

the isolation dimming module is connected with the integrated control module and is used for receiving the driving signal output by the integrated control module and performing isolation dimming;

the indicating module is connected with the integrated control module and used for receiving the driving signal output by the integrated control module and controlling the work of the indicating lamp.

2. The 4KA514 based dimming circuit of claim 1, wherein the power module comprises an ac power source, a ninth resistor, a third diode, a first regulator tube, an eighth capacitor; the power supply regulating module comprises a third resistor, a fifth capacitor, a rectifier, a fourth capacitor and a DC-DC converter;

the first end of the alternating current power supply is connected with the anode of a third diode through a ninth resistor, the cathode of the third diode is connected with the cathode of a first voltage-stabilizing tube, one end of an eighth capacitor, one end of a fifth capacitor and one end of a third resistor, the anode of the first voltage-stabilizing tube is connected with the second end of the alternating current power supply, the other end of the eighth capacitor and the third end of a rectifier, the other ends of the third resistor and the fifth capacitor are connected with the first end of the rectifier, the second end of the rectifier is connected with one end of the fourth capacitor and the ground end, and the fourth end of the rectifier is connected with the other end of the fourth capacitor and the input end of the DC-DC converter.

3. The 4KA514 based dimming circuit of claim 2, wherein the trigger module comprises a touch switch, a first capacitor, a second resistor; the selection control module comprises a first selection switch;

the output end of the touch switch is connected with the third end of the selector switch sequentially through the first capacitor and the second capacitor, and the first end of the selector switch is connected with the first end of the second resistor.

4. The 4KA 514-based dimming circuit of claim 3, wherein the delay control module comprises a first resistor, a third capacitor, a timer;

the fourth end and the eighth end of the timer are both connected with the output end of the DC-DC converter and one end of the first resistor, the seventh end and the sixth end of the timer are both connected with the other end of the first resistor and one end of the third capacitor, the other end of the third capacitor and the first end of the timer are both grounded, and the third end of the timer is connected with the second end of the first selector switch.

5. The 4KA 514-based dimming circuit according to claim 4, wherein the integrated control module comprises a first diode, a second selection switch, an eleventh resistor, an integrated chip; the zero-crossing detection module comprises a ninth capacitor and a tenth resistor;

the fourth end of the integrated chip, the cathode of the first diode and the anode of the second diode are all connected with the second end of the second resistor, the fifth end of the integrated chip is connected with the first end of the rectifier, the seventh end of the integrated chip is connected with the anode of the first diode and the third end of the rectifier, the sixth end of the integrated chip is connected with the first end of the second selector switch, the second end of the second selector switch is connected with the seventh end of the integrated chip, the fourth end of the second selector switch is suspended, the third end of the second selector switch is connected with the third end of the integrated chip, the cathode of the second diode, one end of the eleventh resistor and the cathode of the third diode, the other end of the eleventh resistor is connected with the first end of the integrated chip, the second end of the integrated chip is connected with one end of the ninth capacitor and one end of the tenth resistor, the other end of the tenth resistor is connected with the first end of the alternating current power supply, and the other end of the ninth capacitor is connected with the anode of the first voltage regulator tube.

6. The 4KA 514-based dimming circuit according to claim 5, wherein the isolation dimming module comprises a sixth capacitor, an optocoupler, a fifth resistor, a first power supply, a seventh resistor, a sixth resistor, a thyristor, an eighth resistor, a seventh capacitor and a dimming lamp;

the third end of opto-coupler passes through sixth electric capacity and connects the eighth end of integrated chip, and the fourth end of opto-coupler passes through fifth resistance connection first power, and the one end of sixth ohmic connection thyristor, the one end of eighth resistance and the one end of dimming lamp are passed through to integrated signal's first end, the one end of seventh resistance, the one end of seventh electric capacity and the second end of AC power supply are connected to the other end of thyristor, and AC power supply's first end is connected to the other end of dimming lamp, and the second end of opto-coupler is connected to the other end of seventh resistance and the control end of thyristor, and the other end of eighth resistance is connected to the other end of seventh electric capacity.

7. The 4KA514 based dimming circuit of claim 5, wherein the indication module comprises an inverter, a fourth resistor, a first indicator light;

the input end of the phase inverter is connected with the eighth end of the integrated chip, the output end of the phase inverter is connected with the anode of the first indicator light through the fourth resistor, and the cathode of the first indicator light is grounded.