CN211406376U - DALI adjusts luminance and mixes colour temperature power - Google Patents

Abstract

The utility model discloses a DALI light modulation and color temperature regulation power supply, which comprises an EMI filter circuit, a rectifier circuit, a flyback switch circuit, a PWM controller circuit, a voltage transformation circuit, a cold tone photoelectric circuit, a warm tone photoelectric circuit, a DALI interface circuit, a DALI decoding processing module circuit and a dial circuit; the DALI interface circuit is used for receiving and transmitting DALI signals and transmitting the DALI signals to the DALI decoding processing module circuit for processing, the DALI decoding processing module circuit outputs PWM dimming signals to the cold tone light circuit and the warm tone light circuit respectively for dimming of the two circuits, and the dial circuit is connected to the DALI decoding processing module circuit and used for setting address codes. This novel adjust luminance through adjusting LED drive current size, realize the colour temperature through the cold/warm control switch of conversion and adjust, realize manual setting address code through dial-up circuit.

Description

A DALI dimming and color temperature power supply

technical field

The utility model relates to the technical field of LED power supplies, in particular to a DALI dimming and color temperature power supply.

Background technique

According to the voltage and current characteristics of the LED, the LED light source is generally driven by a constant current power supply. Due to the light color controllability of LEDs, more and more LED lighting fixtures use the function of dimming control.

There are two ways of LED dimming: one is to adjust the pulse width of the LED driving voltage, that is, pulse width modulation (PWM) dimming, and the other is to adjust the size of the LED driving current. Although the frequency of PWM dimming is high enough (generally greater than 100Hz), the human eye cannot distinguish the high-frequency flickering of light during dimming, but whether this high-frequency flickering light has an impact on people's physical and mental health is worthwhile. Our concern, after all, natural sunlight is a continuous ray of light.

However, the DALI system technology has been promoted, but the DALI system can carry up to 64 components with independent addresses, and they are all automatic dialing IDs. The system automatically writes and reads addresses, and cannot accurately identify the location of lamps, which brings inconvenience to adjustment and maintenance. , At the same time, now users have different requirements for different color temperatures, some like warm color temperature, some need cool color temperature, generally below 3000K is warm color temperature, and above 5000K is cold color temperature, different brightness and color temperature requirements are the needs of the market, To this end, it is necessary to design a DALI power supply with adjustable brightness and color temperature to meet market demands.

Utility model content

The technical problem to be solved by the utility model is to provide a DALI dimming and color temperature power supply. The power supply transmits PWM pulses through a microprocessor and converts it into an analog voltage, which is used as a reference level for constant current drive. By adjusting the reference voltage value To adjust the constant current drive output current, adjust the LED drive current for dimming, switch the cool/warm control switch to adjust the color temperature, and manually set the address code through the DIP circuit.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present utility model is: a DALI dimming and color temperature power supply, including an EMI filter circuit, a rectifier circuit, a flyback switch circuit, a PWM controller circuit, a transformer circuit, a cool color tone Light circuit, warm dimming circuit, DALI interface circuit, DALI decoding processing module circuit and dial code circuit; AC alternating current is filtered by EMI filter circuit to filter out differential mode and common mode interference, and then enters the rectifier circuit for rectification and filtering, and then passes through the transformer circuit. Step-down processing is performed. The flyback switch circuit and the PWM controller circuit are connected between the rectifier circuit and the transformer circuit to control the pulse width of the pulse voltage. The cool dimming circuit and the warm dimming circuit are respectively connected to the transformer circuit. The output end, and the two output ends are respectively connected to the cool-color and warm-color load light sources, which are used to adjust the color temperature of the cool and warm colors. The DALI interface circuit is used to send and receive DALI signals, and transmit the DALI signals to the DALI decoding processing module circuit for processing. DALI decoding The processing module circuit outputs the PWM dimming signal to the cold dimming circuit and the warm dimming circuit respectively for dimming of the two circuits, and the dialing circuit is connected to the DALI decoding processing module circuit for setting the address code.

A further optimized technical solution is that the cool dimming circuit includes a step-down voltage regulator chip IC1, the VIN pin 7 and VIN pin 8 of the chip are connected in parallel to the positive output end of the rectifier circuit, and the SNS pin 6 is connected to the cool color tone. For the positive output end of the optical circuit, the resistors RS1 and RS2 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and the SNS pin 6. The switch SW1 is connected in series with resistors R45 and R46 and then connected in parallel between VIN pins 7 and 8. Between the node of VIN pin 8 and SNS pin 6, one end of capacitor C2 is connected to the node of switch SW1 and pin 7 and VIN pin 8, the other end is grounded, and the PDRV pin is connected to the gate of MOS transistor Q3 , the source of the MOS transistor Q3 is connected to the SNS pin 6, the drain of the MOS transistor Q3 is connected to the negative output end of the cool dimming circuit, and the ADJ pin 4 is connected to the DALI decoding processing module circuit through the pull-up resistor R32 to output the PWM dimming signal Output terminal, GND pin 3 is grounded, capacitor C6 and resistor R31 are connected in parallel between ADJ pin 4 and GND pin 3, LX pin 1 is connected to the positive output terminal of the rectifier circuit through the voltage regulator D1, and capacitor C5 is connected in parallel with Between LX pin 1 and GND pin 3, one end of inductor L1 is connected to LX pin 1, the other end is connected to the negative output end of the cool dimming circuit, one end of the capacitor C19 is connected to the positive output end of the rectifier circuit, and the other end is grounded;

The warm dimming circuit includes a step-down voltage regulator chip IC2, the VIN pin 7 and VIN pin 8 of the chip are connected in parallel to the positive output end of the rectifier circuit, and the SNS pin 6 is connected to the positive output end of the warm dimming circuit, Resistors RS3 and RS4 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and SNS pin 6. The switch SW1 is connected in series with resistors R36 and R37 and then connected in parallel between the junction of VIN pin 7 and VIN pin 8. Between the point and SNS pin 6, one end of capacitor C7 is connected to the junction of switch SW2 and pin 7 and VIN pin 8, the other end is grounded, the PDRV pin is connected to the gate of MOS transistor Q4, and the source of MOS transistor Q4 The pole is connected to SNS pin 6, the drain of MOS transistor Q4 is connected to the negative output terminal of the warm dimming circuit, and the ADJ pin 4 is connected to the DALI decoding processing module circuit through the pull-up resistor R43 to output the PWM dimming signal output terminal, and the GND pin 3 is grounded, capacitor C9 and resistor R42 are connected in parallel between ADJ pin 4 and GND pin 3, LX pin 1 is connected to the positive output end of the rectifier circuit through voltage regulator D6, and capacitor C8 is connected in parallel between LX pin 1 and GND Between pins 3, one end of inductor L2 is connected to LX pin 1, the other end is connected to the negative output end of the warm dimming circuit, one end of the capacitor C23 is connected to the positive output end of the rectifier circuit, and the other end is grounded.

A further optimized technical solution is that the DALI interface circuit includes a DALI signal input end, a rectifier chip U4, transistors VT1, VT2, VT4, MOS transistors VT3, and optocouplers U2 and U3; the input end of the rectifier chip U4 and the DALI signal input end. Connection, the base of the triode VT1 is connected to the positive output terminal of the rectifier chip U4 through the resistor R1, the emitter is connected to the positive output terminal of the rectifier chip U4, the collector is connected to the base of the triode VT2, and the emitter of the triode VT2 is connected to the base of the triode VT1 , the collector is connected to the output terminal of the photocoupler U2, the base is connected to the negative output terminal of the rectifier chip U4 through the resistors R3, R7, R9, the drain of the MOS tube VT3 is connected to the emitter of the triode VT1, and the gate of the MOS tube VT3 Divided into two channels, one is connected to the output end of the photocoupler U3 through the resistor R5, the source of the MOS tube VT3 is connected to the base of the triode VT4 through the resistor R6, the emitter of the triode VT4 is connected to the negative output end of the rectifier chip U4, and the resistors R10, R11 and The capacitor C8 is connected in parallel between the node of the MOS tube VT3 and the resistor R6 and the negative output end of the rectifier chip U4. The output receiving signal DRX of the photocoupler U2 is sent to the signal receiving end of the MCU processor of the DALI decoding processing module circuit, and the photoelectric coupling The device U3 outputs the activation signal DTX to the signal receiving end of the MCU processor of the DALI decoding processing module circuit.

A further optimized technical solution is that the DALI decoding processing module circuit includes an MVU processing chip, the PA1 pin is connected to the output end of the photocoupler U2, the PA4 pin is connected to the output end of the photocoupler U3, and the PA9 pin is connected to the output end of the photocoupler U3, and the PA9 pin is connected to the pull-up resistor R32. Connect to ADJ pin 4 of chip IC1, PA10 pin is connected to ADJ pin 4 of chip IC2 via pull-up resistor R43, PFO pin and PF1 pin are connected with crystal oscillator circuit, PA13 pin and PA14 pin are connected with EEPROM access device, the address pins PB8 to PB14 are connected to the DIP circuit.

A further optimized technical solution is that the DIP circuit is composed of two 8421 DIP switches, one of which constitutes the ten-bit address bit of the address bit, and the other constitutes the one-bit address bit.

The beneficial effects produced by adopting the above technical solutions are: the utility model has the function of outputting two independent powers, realizes adjustable color temperature control by converting the light source of cold and warm color temperature, has the function of manual dialing of the address (ID), and can be found through the numbers of DALI. Address lighting interface to realize dimming control of light source, realize intelligent control, meet the needs of different users, and match more reasonable lighting solutions.

Description of drawings

Fig. 1 is the main power circuit diagram of the DALI dimming and color temperature power supply in this embodiment;

Fig. 2 is the circuit diagram of cool dimming circuit and warm dimming circuit in this example;

Fig. 3 is the circuit diagram of the DALI interface circuit in the present embodiment;

Fig. 4 is the circuit diagram of the DALI decoding processing module circuit in the present embodiment;

Fig. 5 is the circuit diagram of the dialing circuit in this embodiment;

FIG. 6 is a circuit diagram of the power supply circuit in this embodiment.

Detailed ways

The technical solutions in 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIG. 1, the utility model discloses a DALI dimming and color temperature power supply, which includes an EMI filter circuit, a rectifier circuit, a flyback switch circuit, a PWM controller circuit, a transformer circuit, a cold color dimming circuit, and a warm color dimming circuit. Optical circuit, DALI interface circuit, DALI decoding processing module circuit and dialing circuit; AC alternating current is filtered by EMI filter circuit to filter out differential mode and common mode interference, and then enters rectifier circuit for rectification and filtering, and then goes through transformer circuit for step-down processing. The flyback switch circuit and the PWM controller circuit are connected between the rectifier circuit and the transformer circuit to control the pulse width of the pulse voltage. The output ends of the circuit are respectively connected to the load light sources of cool and warm colors, which are used to adjust the color temperature of cool and warm colors. The DALI interface circuit is used to send and receive DALI signals, and transmit the DALI signals to the DALI decoding processing module circuit for processing. The DALI decoding processing module circuit outputs PWM The dimming signal is respectively given to the cold dimming circuit and the warm dimming circuit for dimming of the two circuits, and the dialing circuit is connected to the DALI decoding processing module circuit for setting the address code.

Specifically, the mains 220Vac passes through the EMI filter circuit composed of LF1, CX1, and LF2 to filter out the differential mode and common mode interference, and then enters the rectifier bridge BD1 rectifier and the filter circuit composed of C12, C4, and L, and converts the AC into 300V DC. The high-voltage DC 300V is converted into 50V low-voltage DC through the flyback switching circuit composed of peripheral components such as U1, T1, Q1; the dimming and color temperature circuit is composed of two DC-DC step-down circuits, one for warm color and one for cold color. It is composed of IC1, IC2 and its peripheral circuits. The constant current of the two channels can be switched through the DIP switches SW1 and SW2; the dimming of cool and warm colors is controlled by the output PWM signal of the DALI decoding module; IC3 and its peripheral circuits, L5 , E2 constitutes a power supply circuit, providing a stable 12V voltage to supply power to the DALI decoding module.

As shown in Figure 2, the specific cool dimming circuit includes a step-down voltage regulator chip IC1, the VIN pin 7 and VIN pin 8 of the chip are connected in parallel to the positive output end of the rectifier circuit, and the SNS pin 6 is connected to the cool color The positive output terminal of the dimming circuit, the resistance RS1 and RS2 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and the SNS pin 6, and the switch SW1 is connected in series with resistors R45 and R46 and then connected in parallel with VIN pin 7 Between the junction of VIN pin 8 and SNS pin 6, one end of capacitor C2 is connected to the junction of switch SW1 and pin 7 and VIN pin 8, the other end is grounded, and the PDRV pin is connected to the gate of MOS transistor Q3 pole, the source of the MOS transistor Q3 is connected to the SNS pin 6, the drain of the MOS transistor Q3 is connected to the negative output end of the cool dimming circuit, and the ADJ pin 4 is connected to the DALI decoding processing module circuit through the pull-up resistor R32 to output PWM dimming Signal output terminal, GND pin 3 is grounded, capacitor C6 and resistor R31 are connected in parallel between ADJ pin 4 and GND pin 3, LX pin 1 is connected to the positive output end of the rectifier circuit through voltage regulator D1, and capacitor C5 is connected in parallel Between LX pin 1 and GND pin 3, one end of inductor L1 is connected to LX pin 1, the other end is connected to the negative output end of the cool dimming circuit, one end of the capacitor C19 is connected to the positive output end of the rectifier circuit, and the other end is grounded;

As shown in FIG. 2, specifically, the warm dimming circuit includes a step-down voltage regulator chip IC2, the VIN pin 7 and VIN pin 8 of the chip are connected in parallel to the positive output end of the rectifier circuit, and the SNS pin 6 is connected to To the positive output terminal of the warm dimming circuit, the exclusion resistors RS3 and RS4 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and the SNS pin 6, and the switch SW1 is connected in series with resistors R36 and R37 in parallel with the VIN pin. Between the junction of pin 7 and VIN pin 8 and SNS pin 6, one end of capacitor C7 is connected to the junction of switch SW2 and pin 7 and VIN pin 8, the other end is grounded, and the PDRV pin is connected to MOS transistor Q4 The gate of the MOS transistor Q4 is connected to the SNS pin 6, the drain of the MOS transistor Q4 is connected to the negative output terminal of the warm dimming circuit, and the ADJ pin 4 is connected to the DALI decoding processing module circuit through the pull-up resistor R43 to output PWM Dimming signal output terminal, GND pin 3 is grounded, capacitor C9 and resistor R42 are connected in parallel between ADJ pin 4 and GND pin 3, LX pin 1 is connected to the positive output terminal of the rectifier circuit through voltage regulator D6, and capacitor C8 Connected in parallel between LX pin 1 and GND pin 3, one end of inductor L2 is connected to LX pin 1, the other end is connected to the negative output end of the warm dimming circuit, one end of the capacitor C23 is connected to the positive output end of the rectifier circuit, and the other end is grounded .

As shown in Figure 3, the DALI interface circuit includes a DALI signal input end, a rectifier chip U4, transistors VT1, VT2, VT4, MOS transistors VT3, photocouplers U2, U3; the input end of the rectifier chip U4 is connected to the DALI signal input end, The base of the triode VT1 is connected to the positive output terminal of the rectifier chip U4 through the resistor R1, the emitter is connected to the positive output terminal of the rectifier chip U4, the collector is connected to the base of the triode VT2, the emitter of the triode VT2 is connected to the base of the triode VT1, the collector The electrode is connected to the output terminal of the photocoupler U2, the base is connected to the negative output terminal of the rectifier chip U4 through the resistors R3, R7, R9, the drain of the MOS tube VT3 is connected to the emitter of the triode VT1, and the gate of the MOS tube VT3 is divided into two parts. One way is connected to the output end of the photocoupler U3 through the resistor R5, the source of the MOS tube VT3 is connected to the base of the triode VT4 through the resistor R6, the emitter of the triode VT4 is connected to the negative output end of the rectifier chip U4, the resistors R10, R11 and the capacitor C8 It is connected in parallel between the node of MOS tube VT3 and resistor R6 and the negative output terminal of rectifier chip U4. The output receiving signal DRX of photocoupler U2 is sent to the signal receiving end of the MCU processor of the DALI decoding processing module circuit, and the photocoupler U3 Output the start signal DTX to the signal receiving end of the MCU processor of the DALI decoding processing module circuit.

As shown in Figure 4, the DALI decoding processing module circuit includes an MVU processing chip. The PA1 pin is connected to the output end of the photocoupler U2, the PA4 pin is connected to the output end of the photocoupler U3, and the PA9 pin is connected to the chip through the pull-up resistor R32. ADJ pin 4 of IC1, PA10 pin is connected to ADJ pin 4 of chip IC2 through pull-up resistor R43, PFO pin and PF1 pin are connected with crystal oscillator circuit, PA13 pin and PA14 pin are connected with EEPROM accessor, The address pins PB8 to PB14 are connected to the DIP circuit.

As shown in FIG. 5 , the DIP circuit is composed of two 8421 DIP switches, one of which constitutes the ten-bit address bit of the address bit, and the other constitutes the one-bit address bit. The DIP circuit mainly uses two 8421 DIP switches of SWA and SWB, which form the tens and one digits of the address bits. Each machine can set its own address code through SWA and SWB, with a maximum of 64 address codes.

Claims (5)

1. a DALI dimming color temperature power supply, it is characterized in that: comprise EMI filter circuit, rectifier circuit, flyback switch circuit, PWM controller circuit, transformer circuit, cold dimming circuit, warm dimming circuit, DALI interface circuit, DALI decoding processing module circuit and dialing circuit; AC alternating current is filtered by the EMI filter circuit to filter out differential mode and common mode interference, and then enters the rectifier circuit for rectification and filtering, and then goes through the transformer circuit for step-down processing, and the flyback switch circuit and The PWM controller circuit is connected between the rectifier circuit and the transformer circuit, and is used to control the pulse width of the pulse voltage. Connect the cool and warm load light sources to adjust the color temperature of the cool and warm colors. The DALI interface circuit is used to send and receive DALI signals, and transmit the DALI signals to the DALI decoding processing module circuit for processing. The DALI decoding processing module circuit outputs the PWM dimming signal to respectively. The cool dimming circuit and the warm dimming circuit are used for the dimming of the two circuits, and the dialing circuit is connected to the DALI decoding processing module circuit for the setting of the address code. 2. A kind of DALI dimming color temperature power supply according to claim 1, it is characterized in that: described cold color dimming circuit comprises step-down voltage regulator chip IC1, and VIN pin 7 and VIN pin 8 of this chip are connected with each other. It is connected to the positive output terminal of the rectifier circuit, and the SNS pin 6 is connected to the positive output terminal of the cool dimming circuit. The resistance RS1 and RS2 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and SNS pin 6. , the switch SW1 is connected in series with resistors R45 and R46 and then connected between the junction of VIN pin 7 and VIN pin 8 and SNS pin 6, and one end of capacitor C2 is connected to the junction of switch SW1 and pin 7 and VIN pin 8 The other end is grounded, the PDRV pin is connected to the gate of the MOS transistor Q3, the source of the MOS transistor Q3 is connected to the SNS pin 6, the drain of the MOS transistor Q3 is connected to the negative output end of the cool dimming circuit, and the ADJ pin 4 Connect the DALI decoding processing module circuit to the output terminal of the PWM dimming signal through the pull-up resistor R32, the GND pin 3 is grounded, the capacitor C6 and the resistor R31 are connected in parallel between the ADJ pin 4 and the GND pin 3, and the LX pin 1 The voltage regulator tube D1 is connected to the positive output end of the rectifier circuit, the capacitor C5 is connected in parallel between the LX pin 1 and the GND pin 3, one end of the inductor L1 is connected to the LX pin 1, and the other end is connected to the negative output end of the cool dimming circuit. , one end of the capacitor C19 is connected to the positive output end of the rectifier circuit, and the other end is grounded; The warm dimming circuit includes a step-down voltage regulator chip IC2, the VIN pin 7 and VIN pin 8 of the chip are connected in parallel to the positive output end of the rectifier circuit, and the SNS pin 6 is connected to the positive output end of the warm dimming circuit, Resistors RS3 and RS4 are connected in parallel between the junction of VIN pin 7 and VIN pin 8 and SNS pin 6. The switch SW1 is connected in series with resistors R36 and R37 and then connected in parallel between the junction of VIN pin 7 and VIN pin 8. Between the point and SNS pin 6, one end of capacitor C7 is connected to the junction of switch SW2 and pin 7 and VIN pin 8, the other end is grounded, the PDRV pin is connected to the gate of MOS transistor Q4, and the source of MOS transistor Q4 The pole is connected to SNS pin 6, the drain of MOS transistor Q4 is connected to the negative output terminal of the warm dimming circuit, and the ADJ pin 4 is connected to the DALI decoding processing module circuit through the pull-up resistor R43 to output the PWM dimming signal output terminal, and the GND pin 3 is grounded, capacitor C9 and resistor R42 are connected in parallel between ADJ pin 4 and GND pin 3, LX pin 1 is connected to the positive output end of the rectifier circuit through voltage regulator D6, and capacitor C8 is connected in parallel between LX pin 1 and GND Between pins 3, one end of inductor L2 is connected to LX pin 1, the other end is connected to the negative output end of the warm dimming circuit, one end of the capacitor C23 is connected to the positive output end of the rectifier circuit, and the other end is grounded. 3. A DALI dimming and color temperature power supply according to claim 2, wherein the DALI interface circuit comprises a DALI signal input terminal, a rectifier chip U4, triode VT1, VT2, VT4, MOS tube VT3, a photoelectric Couplers U2, U3; the input terminal of the rectifier chip U4 is connected to the DALI signal input terminal, the base of the triode VT1 is connected to the positive output terminal of the rectifier chip U4 through the resistor R1, the emitter is connected to the positive output terminal of the rectifier chip U4, and the collector is connected to the triode The base of VT2, the emitter of triode VT2 is connected to the base of triode VT1, the collector is connected to the output terminal of photocoupler U2, the base is connected to the negative output terminal of rectifier chip U4 through resistors R3, R7 and R9, and the MOS tube VT3 The drain of the MOS transistor VT1 is connected to the emitter of the transistor VT1, the gate of the MOS transistor VT3 is divided into two channels, one is connected to the output end of the photocoupler U3 through the resistor R5, and the source of the MOS transistor VT3 is connected to the base of the transistor VT4 through the resistor R6. The emitter of VT4 is connected to the negative output terminal of the rectifier chip U4, the resistors R10, R11 and the capacitor C8 are connected in parallel between the node of the MOS tube VT3 and the resistor R6 and the negative output terminal of the rectifier chip U4, the output of the optocoupler U2 receives the signal DRX To the signal receiving end of the MCU processor of the DALI decoding processing module circuit, the optocoupler U3 outputs the start signal DTX to the signal receiving end of the MCU processor of the DALI decoding processing module circuit. 4. a kind of DALI dimming and color temperature power supply according to claim 3, is characterized in that: described DALI decoding processing module circuit comprises MVU processing chip, PA1 pin is connected to photoelectric coupler U2 output end, PA4 pin Connect to the output end of photocoupler U3, PA9 pin is connected to ADJ pin 4 of chip IC1 via pull-up resistor R32, PA10 pin is connected to ADJ pin 4, PFO pin and PF1 pin of chip IC2 via pull-up resistor R43 The crystal oscillator circuit is connected, the EEPROM accessor is connected to the PA13 pin and the PA14 pin, and the address pins PB8 to PB14 are connected to the DIP circuit. 5. A DALI dimming and color temperature power supply according to claim 3, characterized in that: the dialing circuit is composed of two 8421 dialing switches, one of which is composed of ten address bits of the address bit, and the other is composed of One-bit address bits.

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