CN212970179U

CN212970179U - Silicon controlled rectifier dimming circuit capable of adjusting color temperature

Info

Publication number: CN212970179U
Application number: CN202021487577.7U
Authority: CN
Inventors: 张权; 姚斌雄
Original assignee: Ningbo Klite Electric Manufacture Co Ltd
Current assignee: Ningbo Klite Electric Manufacture Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-04-13
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a can adjust silicon controlled rectifier dimming circuit of colour temperature, relate to the circuit field, including TRACE light modulator, the rectifier bridge, TRACE light modulation unit, the colour temperature regulation unit, remove the ripple unit, cold look LED light source group and warm look LED light source group, TRACE light modulator links to each other with the live wire, input and TRACE light modulator of rectifier bridge link to each other, another input links to each other with the zero line, rectifier bridge output positive pole links to each other with TRACE light modulation unit bleeder current input, rectifier bridge output negative pole links to each other with public wiring end GND, TRACE light modulation unit LED current input end links to each other with removal ripple unit output, it links to each other with cold look LED light source group and warm look LED light source group to remove ripple unit input, colour temperature regulation unit input links to each other with the rectifier bridge, colour temperature regulation unit output links to each other with cold look LED light source group and warm look LED. The utility model has the advantages that the color temperature of the LED lamp and the brightness of the LED lamp can be simply and effectively adjusted freely by the LED lamp; the LED lamp has the beneficial effect of enabling the light of the LED lamp to be more stable.

Description

Silicon controlled rectifier dimming circuit capable of adjusting color temperature

Technical Field

The utility model belongs to the technical field of the dimmer circuit and specifically relates to a silicon controlled rectifier dimmer circuit that can adjust colour temperature is related to.

Background

Different color temperatures and the brightness of the lamplight are used in different moods, seasons and time periods, so that the mood can be adjusted, and the healthy life can be realized. In the application process of the LED lamp, some occasions need light to realize atmosphere adjustment, different requirements of each person are met, light color temperature can be selected by a free and simple switch, and silicon controlled rectifier dimming can be realized by a dimmer after one color temperature is determined. However, the existing LED silicon controlled rectifier circuit has only one of the functions, which can switch color temperature but cannot adjust brightness, or can adjust brightness but cannot freely switch color temperature. The patent application of the chinese patent publication No. CN 108112130 a discloses a silicon controlled dimming circuit capable of freely selecting a color temperature mode, wherein a color temperature switching circuit is connected between an anode output end and a cathode output end of a rectifier bridge, and has a first output port and a second output port; the first output port is connected to the input end of the first silicon controlled rectifier dimming circuit, and the output end of the first silicon controlled rectifier dimming circuit is connected to the negative electrode of the first LED light source group; the second output port is connected to the input end of the second silicon controlled rectifier dimming circuit, and the output end of the second silicon controlled rectifier dimming circuit is connected to the negative electrode of the second LED light source group; the anode of the first LED light source group and the anode of the second LED light source group are connected to the anode output end of the rectifier bridge; the first output port outputs high level, the first LED light source group is lightened, and the second LED light source group is extinguished; and the brightness of the first LED light source group is adjusted through the silicon controlled rectifier dimmer. Therefore, under the condition of ensuring the traditional external dimension, other structural parts are not added, and the color modulation and dimming of the LED lamp are realized at low cost. This patent has realized the mixing of colors of LED lamp and has adjusted luminance again, but it can only realize the switching of two kinds of colour temperatures, does not have the memory function simultaneously, has applied a plurality of silicon controlled rectifier dimming circuits, and is comparatively complicated, and does not have the ripple structure that goes, and the stability of light is not enough.

Disclosure of Invention

The utility model relates to a solve prior art and can only switch the colour temperature but can't adjust luminance, perhaps can adjust luminance but can not do freely to switch colour temperature and light undulant big, unstable problem provides one kind and gives out light more stable, can realize simultaneously switching the colour temperature of LED lamp and adjusting the silicon controlled rectifier dimmer circuit of the luminance of LED lamp.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a silicon controlled rectifier dimming circuit capable of adjusting color temperature is characterized by comprising a TRACE dimmer, a rectifier bridge, a TRACE dimming unit, a color temperature adjusting unit, a ripple removing unit, a cold color LED light source group and a warm color LED light source group, the TRACE light modulator is connected with a live wire, one input end of the rectifier bridge is connected with the TRACE light modulator, the other input end of the rectifier bridge is connected with a zero line, the positive electrode of the output end of the rectifier bridge is connected with the leakage current input end of the TRACE dimming unit, the cathode of the output end of the rectifier bridge is connected with a common terminal GND, the LED current input end of the TRACE dimming unit is connected with the output end of the ripple removing unit, the input end of the ripple removing unit is connected with the cold color LED light source group and the warm color LED light source group, the input end of the color temperature adjusting unit is connected with the rectifier bridge, the output end of the color temperature adjusting unit is connected with the cold color LED light source group and the warm color LED light source group, and the cold color LED light source group is connected with the warm color LED light source group in parallel. TRACE light modulator is the silicon controlled rectifier light modulator, for phase-cut light modulator, its rectification effect of rectifier bridge, turn into the direct current with commercial power 220V alternating current, the insurance resistance plays overcurrent protection effect, and play the effect of buffering, reduce input current's peak value, the luminance of cold colour LED light source group and warm colour LED light source group is adjusted to the silicon controlled rectifier unit of adjusting luminance, it can reduce the current output ripple to remove the ripple module, reduce the fluctuation of light, the colour temperature of lamp can be adjusted to the colour temperature regulating unit, change the changes in temperature chromatic light, cold colour LED light source group and warm colour LED light source group are the luminescence unit. The color temperature adjusting unit controls the on-off of the circuits of the cold color LED light source group and the warm color LED light source group to realize the adjustment of the cold and warm color temperatures, and the brightness of the lamp can be adjusted by using a TRACE dimmer after the color temperature is set.

Preferably, the TRACE dimming unit comprises an isolation diode DS21, a chip US31 and a resistor RS41, wherein the anode of the isolation diode DS21 is connected with a rectifier bridge, the cathode of the isolation diode DS21 is connected with a cold color LED light source group, a warm color LED light source group and an HVDD pin of the chip US31, the BLE pin of the chip US31 is connected with the rectifier bridge, the GND pin of the chip US31 is connected with a common GND end, one end of the resistor RS41 is connected with a CS pin of the chip US31, and the other end of the resistor RS41 is connected with the common GND end. The DS21 is an isolation diode to prevent the CD21 from discharging through PIN3 of US51 to affect detection, the US31 is a TRACE dimming control IC, a BLE PIN of a chip US31 is a leakage current input port to provide a holding current for the conduction of the controlled silicon, and the holding current is used as an input end to be connected with a dimmer detection end or not, if no dimmer is used for detecting the connection, the circuit efficiency is improved; the chip US31 comprises an OUT pin, an HVDD pin, a CS pin and an RS41 resistor, wherein the OUT pin is an LED current input port, the HVDD pin is an HVDD pin and a high-voltage power supply input port, and the CS pin is an output current value setting port; the VCC pin of the chip US31 is the power supply port inside the chip; the HEMP of the chip US31 sets a port for the over-temperature compensation point, the suspension compensation point is 150 ℃, the grounding is 132 ℃ and the VCC is 120 ℃.

Preferably, the ripple removing unit comprises a chip US41, a filter capacitor CD21 and a power supply filter capacitor CS62, wherein the anode of the filter capacitor CD21 is connected with the cathode of an isolation diode DS21, the cathode of the filter capacitor CD21 is connected with the OUT pin of the chip US31 and the GND pin of the chip US41, one end of the power supply filter capacitor CS62 is connected with the VC pin of the chip US41, and the other end of the power supply filter capacitor CS62 is connected with the GND pin of the US 41. US41 is a ripple-free IC to further reduce output current ripple and optical ripple. CS62 is the supply filter capacitance of the IC.

Preferably, the color temperature adjusting unit comprises a resistor R31A, a resistor R31B and a single chip microcomputer US51, one end of the resistor R31A is connected with the rectifier bridge, the other end of the resistor R31A is connected with a GP 1/CIN-pin of the single chip microcomputer US51, one end of the resistor R31B is connected with a GP 1/CIN-pin of the single chip microcomputer US51, the other end of the resistor R31B is connected with a VSS pin of the single chip microcomputer US51 and a common GND end, the GP3 pin of the single chip microcomputer US51 is connected with the cold color LED light source group, and the GP2/COUT pin of the single chip microcomputer US51 is connected with the warm color LED light source group. US51 controls the adjustment of the color temperature of the lamp, detects the input switching signal through the voltage dividing circuit composed of R31A and R31B, determines the output logic of PIN5 and PIN6, controls the switching of MOS Q41 and Q42, and determines the color temperature value of the lamp. The voltage divider composed of the R31A and the R31B can also be used as a line voltage input high voltage (such as an input voltage greater than 106% of a rated voltage) to reduce the overtemperature protection point of the US51 from 150 ℃ to 120 ℃ so as to regulate the step-down output current and reduce the loss of the US 51.

Preferably, the cold color LED light source group comprises a cold color LED lamp bead string and an MOS tube switch Q41, the cold color LED lamp bead string is formed by connecting a plurality of cold color LED lamp beads in series, the anode of the cold color LED lamp bead string is connected with the cathode of an isolating diode DS21, the cathode of the cold color LED lamp bead string is connected with the drain electrode of an MOS tube switch Q41, the source electrode of the MOS tube switch Q41 is connected with the LEDN pin of a chip US41, and the grid electrode of the MOS tube switch Q41 is connected with the GP3 pin of a single chip US 51. The cold color LED lamp string can emit light with cold color temperature, and the MOS tube is used for controlling the on-off of the cold color LED lamp string, is responsible for the on-off of the circuit and can prevent reverse connection.

Preferably, the warm color LED light source group comprises a warm color LED lamp bead string and an MOS tube switch Q42, the warm color LED lamp bead string is formed by connecting a plurality of warm color LED lamp beads in series, the anode of the warm color LED lamp bead string is connected with the cathode of an isolation diode DS21, the cathode of the warm color LED lamp bead string is connected with the drain electrode of an MOS tube switch Q42, the source electrode of the MOS tube switch Q42 is connected with the LEDN pin of a chip US42, and the grid electrode of the MOS tube switch Q41 is connected with the GP2/COUT pin of a single chip microcomputer US 51. The warm color LED lamp string can emit light with warm color temperature, and the MOS tube is used for controlling the on-off of the warm color LED lamp string, is responsible for the on-off of the circuit and can also prevent reverse connection.

Preferably, the LED chip further comprises a MOS tube switch Q31, the drain of the MOS tube switch Q31 is connected with the VCC pin of the chip US31, the source of the MOS tube switch Q31 is connected with the HEMP pin of the chip US31, and the gate of the MOS tube switch Q31 is connected with the GP0/CIN + of the chip US 51. The chip US31 is connected with the single chip microcomputer US51 through an MOS tube, the temperature of the chip US31 can be controlled through the single chip microcomputer US51, and the reliability of a product can be improved.

Preferably, the circuit further comprises a safety resistor, one end of the safety resistor is connected with the TRACE dimmer, and the other end of the safety resistor is connected with the other input end of the rectifier bridge. A safety resistor is added in the circuit to play a role in overcurrent protection and buffering, so that the peak value of input current is reduced, and the safety of the circuit is ensured.

Therefore, the utility model discloses following beneficial effect has: the color temperature and the brightness of the LED lamp can be adjusted freely by the LED lamp simply and effectively; the light of the LED lamp is more stable.

Drawings

Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the embodiments.

The utility model provides a can adjust silicon controlled rectifier dimming circuit of colour temperature, as shown in figure 1, including TRACE light modulator, the rectifier bridge, TRACE light modulation unit, the colour temperature adjusting unit, remove the ripple unit, cold colour LED light source group and warm colour LED light source group, TRACE light modulator links to each other with the live wire, an input of rectifier bridge links to each other with TRACE light modulator, another input links to each other with the zero line, rectifier bridge output end positive pole links to each other with TRACE light modulation unit bleeder current input end, rectifier bridge output end negative pole links to each other with public wiring end GND, TRACE light modulation unit LED current input end links to each other with removing ripple unit output end, it links to each other with cold colour LED light source group and warm colour LED light source group to remove ripple unit input, colour temperature adjusting unit input end links to each other with the rectifier bridge, colour temperature adjusting unit output links to each other with cold colour LED light source group and warm colour LED light source group. TRACE light modulator is the silicon controlled rectifier light modulator, for phase-cut light modulator, its rectification effect of rectifier bridge, turn into the direct current with commercial power 220V alternating current, the insurance resistance plays overcurrent protection effect, and play the effect of buffering, reduce input current's peak value, the luminance of cold colour LED light source group and warm colour LED light source group is adjusted to the silicon controlled rectifier unit of adjusting luminance, it can reduce the current output ripple to remove the ripple module, reduce the fluctuation of light, the colour temperature of lamp can be adjusted to the colour temperature regulating unit, change the changes in temperature chromatic light, cold colour LED light source group and warm colour LED light source group are the luminescence unit. The color temperature adjusting unit controls the on-off of the circuits of the cold color LED light source group and the warm color LED light source group to realize the adjustment of the cold and warm color temperatures, and the brightness of the lamp can be adjusted by using a TRACE dimmer after the color temperature is set.

The TRACE dimming unit comprises an isolation diode DS21, a chip US31 and a resistor RS41, wherein the anode of the isolation diode DS21 is connected with a rectifier bridge, the cathode of the isolation diode DS21 is connected with the HVDD pin of the cold color LED light source group, the warm color LED light source group and the chip US31, the BLE pin of the chip US31 is connected with the rectifier bridge, the GND pin of the chip US31 is connected with a public GND end, one end of the resistor RS41 is connected with the CS pin of the chip US31, and the other end of the resistor RS41 is connected with the public GND end. The model of the chip US31 is KP18011ESP, DS21 is isolation diode, prevent CD21 from discharging through PIN3 of US51, influence the detection, US31 is TRACE dimming control IC, BLE PIN of the chip US31 is the input port of the bleeder current, offer the holding current for the thyristor is conducted, and connect the dimmer detection end as the input end, if there is no dimmer to measure and close, in order to raise the efficiency of the circuit; the chip US31 comprises an OUT pin, an HVDD pin, a CS pin and an RS41 resistor, wherein the OUT pin is an LED current input port, the HVDD pin is an HVDD pin and a high-voltage power supply input port, and the CS pin is an output current value setting port; the VCC pin of the chip US31 is the power supply port inside the chip; the HEMP of the chip US31 sets a port for the over-temperature compensation point, the suspension compensation point is 150 ℃, the grounding is 132 ℃ and the VCC is 120 ℃.

The ripple removing unit comprises a chip US41, a filter capacitor CD21 and a power supply filter capacitor CS62, wherein the anode of the filter capacitor CD21 is connected with the cathode of an isolation diode DS21, the cathode of the filter capacitor CD21 is connected with the OUT pin of the chip US31 and the GND pin of the chip US41, one end of the power supply filter capacitor CS62 is connected with the VC pin of the chip US41, and the other end of the power supply filter capacitor CS62 is connected with the GND pin of the US 41. The model of the chip US41 is DIO8241F, and US41 is a ripple-removing IC, which further reduces output current ripple and optical fluctuation. CS62 is the supply filter capacitance of the IC.

The color temperature adjusting unit comprises a resistor R31A, a resistor R31B and a single chip microcomputer US51, one end of the resistor R31A is connected with the rectifier bridge, the other end of the resistor R31A is connected with a GP 1/CIN-pin of the single chip microcomputer US51, one end of the resistor R31B is connected with a GP 1/CIN-pin of the single chip microcomputer US51, the other end of the resistor R31B is connected with a VSS pin and a common GND end of the single chip microcomputer US51, a GP3 pin of the single chip microcomputer US51 is connected with a cold color LED light source group, and a GP2/COUT pin of the single chip microcomputer US51 is connected with a warm color. The model number of the singlechip US51 is 10F204, the singlechip US51 controls the color temperature adjustment of the lamp, the input switching signals are detected through a voltage division circuit consisting of R31A and R31B, the logic output by PIN5 and PIN6 is determined, the switches of MOS Q41 and Q42 are controlled, and the color temperature value of the lamp is determined. The voltage divider composed of the R31A and the R31B can also be used as a line voltage input high voltage (such as an input voltage greater than 106% of a rated voltage) to reduce the overtemperature protection point of the US51 from 150 ℃ to 120 ℃ so as to regulate the step-down output current and reduce the loss of the US 51.

Cold color LED light source group includes cold color LED lamp pearl cluster and MOS pipe switch Q41, cold color LED lamp pearl cluster is established ties by a plurality of cold color LED lamp pearl and is constituteed, cold color LED lamp pearl cluster positive pole links to each other with isolation diode DS21 negative pole, cold color LED lamp pearl cluster negative pole links to each other with MOS pipe switch Q41's drain electrode, MOS pipe switch Q41's source electrode links to each other with chip US 41's LEDN pin, MOS pipe switch Q41's grid links to each other with singlechip US 51's GP3 pin. The cold color LED lamp string can emit light with cold color temperature, and the MOS tube is used for controlling the on-off of the cold color LED lamp string, is responsible for the on-off of the circuit and can prevent reverse connection.

Warm look LED light source group is including warm look LED lamp pearl cluster and MOS pipe switch Q42, warm look LED lamp pearl cluster is established ties by a plurality of warm look LED lamp pearl and is constituteed, warm look LED lamp pearl cluster positive pole links to each other with isolation diode DS21 negative pole, warm look LED lamp pearl cluster negative pole links to each other with MOS pipe switch Q42's drain electrode, MOS pipe switch Q42's source electrode links to each other with chip US 42's LEDN pin, MOS pipe switch Q41's grid links to each other with singlechip US 51's GP2/COUT pin. The warm color LED lamp string can emit light with warm color temperature, and the MOS tube is used for controlling the on-off of the warm color LED lamp string, is responsible for the on-off of the circuit and can also prevent reverse connection.

The LED chip is characterized by further comprising a MOS tube switch Q31, wherein the drain electrode of the MOS tube switch Q31 is connected with the VCC pin of the chip US31, the source electrode of the MOS tube switch Q31 is connected with the HEMP pin of the chip US31, and the gate electrode of the MOS tube switch Q31 is connected with GP0/CIN + of the chip US 51. The chip US31 is connected with the single chip microcomputer US51 through an MOS tube, the temperature of the chip US31 can be controlled through the single chip microcomputer US51, and the reliability of a product can be improved.

And one end of the safety resistor is connected with the TRACE dimmer, and the other end of the safety resistor is connected with the other input end of the rectifier bridge. A safety resistor is added in the circuit to play a role in overcurrent protection and buffering, so that the peak value of input current is reduced, and the safety of the circuit is ensured.

When the circuit works, the input switching signals are detected through a voltage division circuit consisting of R31A and R31B, the logics of PIN5 and PIN6 output are determined, the switching of MOS Q41 and Q42 is controlled, the color temperature value of the lamp is determined, and the control commands are as follows:

after the color temperature is set, the brightness of the lamp can be adjusted by the silicon controlled dimmer, so that the functions of adjusting the color temperature of the lamp light and adjusting the wide brightness are realized.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A silicon controlled rectifier dimming circuit capable of adjusting color temperature is characterized by comprising a TRACE dimmer, a rectifier bridge, a TRACE dimming unit, a color temperature adjusting unit, a ripple removing unit, a cold color LED light source group and a warm color LED light source group, the TRACE light modulator is connected with a live wire, one input end of the rectifier bridge is connected with the TRACE light modulator, the other input end of the rectifier bridge is connected with a zero line, the positive electrode of the output end of the rectifier bridge is connected with the leakage current input end of the TRACE dimming unit, the cathode of the output end of the rectifier bridge is connected with a common terminal GND, the LED current input end of the TRACE dimming unit is connected with the output end of the ripple removing unit, the input end of the ripple removing unit is connected with the cold color LED light source group and the warm color LED light source group, the input end of the color temperature adjusting unit is connected with the rectifier bridge, the output end of the color temperature adjusting unit is connected with the cold color LED light source group and the warm color LED light source group, and the cold color LED light source group is connected with the warm color LED light source group in parallel.

2. The silicon controlled rectifier dimming circuit capable of adjusting color temperature according to claim 1, wherein the TRACE dimming unit comprises an isolation diode DS21, a chip US31 and a resistor RS41, the anode of the isolation diode DS21 is connected with a rectifier bridge, the cathode of the isolation diode DS21 is connected with the HVDD pin of the cold color LED light source group, the warm color LED light source group and the chip US31, the BLE pin of the chip US31 is connected with the rectifier bridge, the GND pin of the chip US31 is connected with a common GND terminal, one end of the resistor RS41 is connected with the CS pin of the chip US31, and the other end of the resistor RS41 is connected with the common GND terminal.

3. The silicon controlled rectifier dimming circuit capable of adjusting the color temperature according to claim 2, wherein the ripple removing unit comprises a chip US41, a filter capacitor CD21 and a power supply filter capacitor CS62, the anode of the filter capacitor CD21 is connected with the cathode of an isolation diode DS21, the cathode of the filter capacitor CD21 is connected with the OUT pin of the chip US31 and the GND pin of the chip US41, one end of the power supply filter capacitor CS62 is connected with the VC pin of the chip US41, and the other end of the power supply filter capacitor CS62 is connected with the GND pin of the US 41.

4. The silicon controlled rectifier dimming circuit capable of adjusting the color temperature according to claim 1, wherein the color temperature adjusting unit comprises a resistor R31A, a resistor R31B and a single chip microcomputer US51, one end of the resistor R31A is connected with a rectifier bridge, the other end of the resistor R31A is connected with a GP 1/CIN-pin of the single chip microcomputer US51, one end of the resistor R31B is connected with a GP 1/CIN-pin of the single chip microcomputer US51, the other end of the resistor R31B is connected with a VSS pin of the single chip microcomputer US51 and a common GND end, the GP3 pin of the single chip microcomputer US51 is connected with a cold color LED light source group, and the GP2/COUT pin of the single chip microcomputer US51 is connected with a warm color LED light source group.

5. The silicon controlled rectifier dimming circuit capable of adjusting the color temperature according to claim 4, wherein the cold color LED light source group comprises a cold color LED lamp bead string and a MOS tube switch Q41, the cold color LED lamp bead string is formed by connecting a plurality of cold color LED lamp beads in series, the anode of the cold color LED lamp bead string is connected with the cathode of an isolating diode DS21, the cathode of the cold color LED lamp bead string is connected with the drain electrode of the MOS tube switch Q41, the source electrode of the MOS tube switch Q41 is connected with the LEDN pin of a chip US41, and the grid electrode of the MOS tube switch Q41 is connected with the GP3 pin of a single chip US 51.

6. The silicon controlled rectifier dimming circuit capable of adjusting the color temperature according to claim 5, wherein the warm color LED light source group comprises a warm color LED lamp bead string and a MOS tube switch Q42, the warm color LED lamp bead string is formed by connecting a plurality of warm color LED lamp beads in series, the anode of the warm color LED lamp bead string is connected with the cathode of an isolation diode DS21, the cathode of the warm color LED lamp bead string is connected with the drain electrode of the MOS tube switch Q42, the source electrode of the MOS tube switch Q42 is connected with the LEDN pin of a chip US42, and the grid electrode of the MOS tube switch Q41 is connected with the GP2/COUT pin of a single chip US 51.

7. The silicon controlled rectifier dimming circuit capable of adjusting the color temperature according to claim 1, further comprising a MOS transistor switch Q31, wherein a drain of the MOS transistor switch Q31 is connected to a VCC pin of a chip US31, a source of the MOS transistor switch Q31 is connected to a HEMP pin of the chip US31, and a gate of the MOS transistor switch Q31 is connected to GP0/CIN + of the chip US 51.

8. The silicon controlled rectifier dimming circuit capable of adjusting color temperature according to claim 1, further comprising a safety resistor, wherein one end of the safety resistor is connected to the TRACE dimmer, and the other end of the safety resistor is connected to the other input end of the rectifier bridge.