Silicon controlled rectifier dimming ERP standard color modulation control circuit

Abstract

The utility model discloses a silicon controlled rectifier dimming ERP (Enterprise Resource Planning) standard color modulation control circuit, and relates to the technical field of circuits. 220V alternating current is connected with the input protection circuit through the silicon controlled rectifier dimmer, the output end of the input protection circuit is connected with the rectification circuit, the rectification circuit is connected with the silicon controlled rectifier controller through the power supply circuit, and the silicon controlled rectifier controller is connected with the ERP standard constant current regulator through the holding current regulating circuit. The ERP standard constant current regulator is respectively connected with the reference current regulating circuit and the HI port current regulating circuit, the rectifying circuit is connected with the isolating loop, the isolating loop is respectively connected with the stroboscopic and input current compensating circuit and the LED lamp bead string circuit, and the stroboscopic and input current compensating circuit and the LED lamp bead string circuit are both connected with the ERP standard constant current regulator. The dimming circuit is simple in circuit, convenient to debug, capable of achieving the dimming function, low in cost, easy to authenticate and integrate, capable of meeting the ERP authentication requirement and wide in application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a thyristor dimming ERP standard color adjustment control circuit. Background Art

[0002] According to the new ErP regulations EU2019 / 2020 for lighting products and the current harmonic standard IEC 61000-3-2:2019 announced by the EU on December 5, 2019, current lighting products can no longer meet the needs of the European market. In order to meet the needs of the market and customers, various solution providers have upgraded and improved their products. The upgraded products have two representative point solutions: using a linear solution to achieve an ERP standard line and using a switching power supply to achieve a dimming function. Specifically, the shortcomings of each solution are as follows:

[0003] (1) Using a linear solution to implement the ERP standard circuit: This solution cannot use the thyristor dimming function and has a single function.

[0004] (2) Using switching power supply to realize dimming function:

[0005] ①This solution has the function of thyristor dimming, but it cannot meet the ERP requirements and cannot pass the ERP standards;

[0006] ② High cost, requiring a bulky transformer for energy storage and voltage reduction. The cost of the transformer is expensive, ranging from 1 yuan to several yuan;

[0007] ③It cannot be integrated, and a separate power module is required, which cannot be integrated into LED lamps;

[0008] ④ There are many peripheral circuits, and the switching power supply has a switching frequency. A large number of safety components need to pass safety and electromagnetic interference certification, so more peripheral devices are required;

[0009] ⑤Difficult to pass certification, because the switching power supply control adopts PWM switch to achieve control, there is a problem of switching frequency, and the conducted noise and radiated noise are difficult to adjust during certification, and safety devices need to be added to pass certification.

[0010] In order to solve the above problems, it is particularly necessary to design a new type of thyristor dimming ERP standard color control circuit. Utility Model Content

[0011] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a thyristor dimming ERP standard color control circuit with a simple structure, reasonable design, compliance with ERP requirements, realization of dimming function, easy integration, low cost, strong practicality, and easy promotion and use.

[0012] In order to achieve the above-mentioned purpose, the utility model is realized by the following technical scheme: a thyristor dimming ERP standard color adjustment control circuit, including a thyristor dimmer, an input protection circuit, a rectifier circuit, a thyristor controller, a power supply circuit, a maintaining current adjustment circuit, an isolation circuit, a strobe and input current compensation circuit, an ERP standard constant current regulator, a reference current adjustment circuit, a HI port current adjustment circuit and an LED lamp bead string circuit, 220V AC power is connected to the input protection circuit via the thyristor dimmer, the output end of the input protection circuit is connected to the rectifier circuit, the rectifier circuit is connected to the thyristor controller through the power supply circuit, the thyristor controller is connected to the ERP standard constant current regulator through the maintaining current adjustment circuit, the ERP standard constant current regulator is respectively connected to the reference current adjustment circuit and the HI port current adjustment circuit, the rectifier circuit is connected to the isolation circuit, the isolation circuit is respectively connected to the strobe and input current compensation circuit and the LED lamp bead string circuit, the strobe and input current compensation circuit and the LED lamp bead string circuit are all connected to the ERP standard constant current regulator.

[0013] Preferably, the input protection circuit comprises a fuse and a surge resistor, and the thyristor dimmer is connected in series with the fuse and the surge resistor and connected between the live wire and the neutral wire of the 220V AC power.

[0014] Preferably, the rectifier circuit includes a rectifier bridge, and the input end of the rectifier bridge is connected to the two ends of the surge resistor; the power supply circuit includes a first resistor, one end of the first resistor is connected to the output end of the rectifier bridge, and the other end of the first resistor is connected to the OUT terminal of the thyristor controller.

[0015] Preferably, the holding current regulating circuit comprises a second resistor, one end of the second resistor is connected to the CS terminal of the thyristor controller, and the other end of the second resistor is connected to the RT terminal of the ERP standard constant current regulator.

[0016] Preferably, the isolation circuit includes a diode, the positive electrode of the diode is connected to the output end of the rectifier bridge, and the negative electrode of the diode is respectively connected to the strobe and input current compensation circuit and the LED lamp bead string circuit.

[0017] Preferably, the strobe and input current compensation circuit includes a third resistor and an energy storage compensation capacitor, the third resistor and the energy storage compensation capacitor are connected in parallel, one end of the parallel connection is connected to the cathode of the diode, and the other end is connected to the HI terminal of the ERP standard constant current regulator.

[0018] Preferably, the reference current regulation circuit includes a fourth resistor, the HI port current regulation circuit includes a fifth resistor, one end of the fourth resistor is grounded, and the other end of the fourth resistor is connected to the RT terminal of the ERP standard constant current regulator; one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected to the CS terminal of the ERP standard constant current regulator.

[0019] Preferably, the LED lamp bead string circuit includes a first LED lamp bead to an nth LED lamp bead, the positive terminal of the circuit composed of the above-mentioned lamp beads connected in series is connected to the negative electrode of the diode, the negative terminal is connected to the OUT terminal of the ERP standard constant current regulator, and the negative terminal is also connected to the sixth resistor to the RV terminal of the ERP standard constant current regulator, and the OUT terminal of the ERP standard constant current regulator is connected to the first capacitor to the ground; the first LED lamp bead to the nth LED lamp bead adopts color temperature lamp beads of any range of 1000K-10000K.

[0020] The beneficial effects of the utility model are as follows: the circuit is simple, the debugging is convenient, the dimming function is realized, the cost is low, the certification is easy, the integration is easy, the ERP certification requirements are met, the reliability is high, and the application prospect is broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods;

[0022] Figure 1 It is a structural block diagram of the utility model;

[0023] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] Reference Figure 1-2The specific implementation adopts the following technical scheme: a thyristor dimming ERP standard color adjustment control circuit, including a thyristor dimmer RT, an input protection circuit 1, a rectifier circuit 2, a thyristor controller U1, a power supply circuit 3, a maintenance current adjustment circuit 4, an isolation circuit 5, a strobe and input current compensation circuit 6, an ERP standard constant current regulator U2, a reference current adjustment circuit 7, a HI port current adjustment circuit 8 and an LED lamp bead string circuit 9. The 220V AC power is connected to the input protection circuit 1 through the thyristor dimmer RT, and the output end of the input protection circuit 1 is connected to the rectifier circuit. The rectifier circuit 2 is connected to the thyristor controller U1 through the power supply circuit 3, the thyristor controller U1 is connected to the ERP standard constant current regulator U2 through the maintaining current regulation circuit 4, the ERP standard constant current regulator U2 is respectively connected to the reference current regulation circuit 7 and the HI port current regulation circuit 8, the rectifier circuit 2 is connected to the isolation circuit 5, the isolation circuit 5 is respectively connected to the strobe and input current compensation circuit 6 and the LED lamp bead string circuit 9, the strobe and input current compensation circuit 6 and the LED lamp bead string circuit 9 are all connected to the ERP standard constant current regulator U2. Specifically, the composition structure and connection relationship of each circuit are as follows:

[0026] The input protection circuit 1 includes a fuse F1 and a surge resistor V1, and the rectifier circuit 2 includes a rectifier bridge BD1. The thyristor dimmer RT, the fuse F1 and the surge resistor V1 are connected in series between the live wire and the neutral wire of the 220V AC power. The input end of the rectifier bridge BD1 is connected to both ends of the surge resistor V1. The brightness of the lamp can be changed by adjusting the size of the thyristor dimmer RT. The fuse F1 is used to automatically blow to protect the safety of the back-end circuit and products when an abnormality occurs in the entire system. The surge resistor V1 protects the entire circuit system from being damaged by the surge voltage of the external power grid. The rectifier bridge BD1 rectifies the AC into DC.

[0027] The power supply circuit 3 includes a first resistor RS, one end of the first resistor RS is connected to the output end of the rectifier bridge BD1, and the other end of the first resistor RS is connected to the OUT terminal of the thyristor controller U1. The first resistor RS is a power supply current limiting and voltage reducing resistor of the thyristor controller U1, and provides a starting current and voltage for the thyristor controller U1. The thyristor controller U1 adopts a common linear regulator with dimming function on the market.

[0028] The maintaining current regulating circuit 4 includes a second resistor R1, one end of the second resistor R1 is connected to the CS terminal of the thyristor controller U1, and the other end of the second resistor R1 is connected to the RT terminal of the ERP standard constant current regulator U2. The second resistor R1 is used for maintaining current regulation of the ERP standard constant current regulator U2. By adjusting the size of the second resistor R1, the maintaining current of the ERP standard constant current regulator U2 can be adjusted to better match more regulators and make the dimming smoother. The ERP standard constant current regulator U2 is a universal linear constant current ERP standard regulator.

[0029] The isolation circuit 5 includes a diode D1, the positive electrode of the diode D1 is connected to the output end of the rectifier bridge BD1, and the negative electrode of the diode D1 is respectively connected to the strobe and input current compensation circuit 6 and the LED lamp bead string circuit 9. The strobe and input current compensation circuit 6 includes a third resistor R2 and an energy storage compensation capacitor Ce1, the third resistor R2 is a discharge resistor, and the third resistor R2 is connected in parallel with the energy storage compensation capacitor Ce1, one end of the parallel connection is connected to the negative electrode of the diode D1, and the other end is connected to the HI terminal of the ERP standard constant current regulator U2.

[0030] The reference current regulation circuit 7 includes a fourth resistor R3, which is an output current setting resistor. The HI port current regulation circuit 8 includes a fifth resistor R4, which is a HI ERP standard port compensation current setting resistor, wherein one end of the fourth resistor R3 is grounded, and the other end of the fourth resistor R3 is connected to the RT terminal of the ERP standard constant current regulator U2; one end of the fifth resistor R4 is grounded, and the other end of the fifth resistor R4 is connected to the CS terminal of the ERP standard constant current regulator U2.

[0031] The LED lamp bead string circuit 9 includes a first LED lamp bead L1 to an nth LED lamp bead Ln. The positive terminal of the circuit composed of the above-mentioned lamp beads connected in series is connected to the negative electrode of the diode D1, and the negative terminal is connected to the OUT terminal of the ERP standard constant current regulator U2. The negative terminal is also connected to the sixth resistor R5 to the RV terminal of the ERP standard constant current regulator U2. The OUT terminal of the ERP standard constant current regulator U2 is connected to the first capacitor C1 to the ground. The first LED lamp bead L1 to the nth LED lamp bead Ln use color temperature lamp beads of any range of 1000K-10000K.

[0032] The working principle of this specific implementation method is as follows: the circuit is connected to the live wire and the neutral wire of the 220V AC power or other power supply, and after the surge is absorbed by the fuse F1 and the surge resistor V1, it is rectified by the rectifier bridge BD1. The rectified power supply passes through the first resistor RS to provide the starting power supply for the thyristor controller U1, and the thyristor controller U1 enters the working preparation state; the other path passes through the diode D1 and is divided into two paths. The first path goes to the positive electrode of the first LED lamp bead L1 to provide voltage to the first LED lamp bead L1. At this time, the first LED lamp bead L1 is in the waiting command state; the second path goes to the HI port of the ERP standard constant current regulator U2 after current compensation by the third resistor R2 and the energy storage compensation capacitor Ce1, and provides compensation current and high-voltage starting current voltage for HI. At this time, the ERP standard constant current regulator U2 enters the working state. By adjusting the fifth resistor R4 at the external CS port, the charging current of the electrolytic solution can be increased or decreased to meet the harmonic and stroboscopic standards of the ERP. The calculation formula of the charging current of the CS port is I HI =V CS / R CS = VREXT / R3(A); When adjusting the regulator, the thyristor controller U1 provides a maintaining current for the ERP standard constant current regulator U2 through the second resistor R1, which makes the dimming process smoother without flickering.

[0033] This specific implementation has a simple circuit, is easy to debug, realizes the dimming function, and meets the needs of the market and customers. Its technical advantages are:

[0034] ① The circuit is simple. It uses the common ERP standard linear constant current chip on the market as the linear constant current regulator and cooperates with the common color temperature adjustment function circuit on the market. It uses few components and the circuit is extremely simple. At the same time, the color temperature control system does not require writing a specific program, eliminating the trouble of debugging the program, making debugging easier and shortening the entire product development cycle.

[0035] ② Electronic components are highly interchangeable. As long as the parameters and performance of the electronic components used in the circuit are consistent, they can be used universally, and the selection is more diversified.

[0036] ③Easy to integrate. This circuit does not have a bulky transformer and numerous safety components. It is small in size and can be easily integrated into LED lamps to become a light source that integrates the driver and the lamp, reducing the size and weight of the lamp.

[0037] ④The dimming is smooth, the dimming process is good, and there is no flickering phenomenon during the process.

[0038] ⑤ Comply with ERP certification requirements, easy to pass certification, line linear drive, eliminating switching frequency problems, no noise is generated when MOS is turned on and off, no conducted noise and radiated noise are generated, no need to add any safety devices, saving costs.

[0039] ⑥ Low cost, adopts linear drive solution, simple circuit, uses fewer components, greatly reduces costs, makes the product more competitive, meets market demand, and has broad market application prospects.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thyristor dimming ERP standard color control circuit, characterized in that: The invention comprises a thyristor dimmer (RT), an input protection circuit (1), a rectifier circuit (2), a thyristor controller (U1), a power supply circuit (3), a maintaining current regulating circuit (4), an isolation circuit (5), a strobe and input current compensation circuit (6), an ERP standard constant current regulator (U2), a reference current regulating circuit (7), an HI port current regulating circuit (8) and an LED lamp bead string circuit (9). 220V AC power is connected to the input protection circuit (1) via the thyristor dimmer (RT), the output end of the input protection circuit (1) is connected to the rectifier circuit (2), and the rectifier circuit (2) is connected to the power supply circuit ( 3) connected to a thyristor controller (U1), the thyristor controller (U1) is connected to an ERP standard constant current regulator (U2) through a maintaining current regulating circuit (4), the ERP standard constant current regulator (U2) is respectively connected to a reference current regulating circuit (7) and an HI port current regulating circuit (8), the rectifier circuit (2) is connected to an isolation circuit (5), the isolation circuit (5) is respectively connected to a stroboscopic and input current compensation circuit (6) and an LED lamp bead string circuit (9), the stroboscopic and input current compensation circuit (6) and the LED lamp bead string circuit (9) are both connected to the ERP standard constant current regulator (U2).

2. According to claim 1, a thyristor dimming ERP standard color control circuit is characterized in that: The input protection circuit (1) comprises a fuse (F1) and a surge resistor (V1); a thyristor dimmer (RT), the fuse (F1) and the surge resistor (V1) are connected in series between the live wire and the neutral wire of a 220V alternating current.

3. According to claim 1, a thyristor dimming ERP standard color control circuit is characterized in that: The rectifier circuit (2) comprises a rectifier bridge (BD1), and the input end of the rectifier bridge (BD1) is connected to the two ends of the surge resistor (V1).

4. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The power supply circuit (3) comprises a first resistor (RS), one end of the first resistor (RS) is connected to the output end of the rectifier bridge (BD1), and the other end of the first resistor (RS) is connected to the OUT terminal of the thyristor controller (U1).

5. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The holding current regulating circuit (4) comprises a second resistor (R1), one end of the second resistor (R1) is connected to the CS terminal of the thyristor controller (U1), and the other end of the second resistor (R1) is connected to the RT terminal of the ERP standard constant current regulator (U2).

6. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The isolation circuit (5) comprises a diode (D1), the positive electrode of the diode (D1) is connected to the output end of the rectifier bridge (BD1), and the negative electrode of the diode (D1) is respectively connected to the strobe and input current compensation circuit (6) and the LED lamp bead string circuit (9).

7. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The strobe and input current compensation circuit (6) comprises a third resistor (R2) and an energy storage compensation capacitor (Ce1), wherein the third resistor (R2) and the energy storage compensation capacitor (Ce1) are connected in parallel, one end of the parallel connection is connected to the cathode of the diode (D1), and the other end is connected to the HI terminal of the ERP standard constant current regulator (U2).

8. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The reference current regulating circuit (7) comprises a fourth resistor (R3), one end of the fourth resistor (R3) is grounded, and the other end of the fourth resistor (R3) is connected to the RT terminal of the ERP standard constant current regulator (U2).

9. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The HI port current regulating circuit (8) comprises a fifth resistor (R4), one end of the fifth resistor (R4) is grounded, and the other end of the fifth resistor (R4) is connected to the CS terminal of the ERP standard constant current regulator (U2).

10. The thyristor dimming ERP standard color adjustment control circuit according to claim 1, characterized in that: The LED lamp bead string circuit (9) comprises a first LED lamp bead (L1) to an nth LED lamp bead (Ln), wherein the positive terminal of the circuit formed by sequentially connecting the above-mentioned lamp beads in series is connected to the negative terminal of a diode (D1), and the negative terminal is connected to the OUT terminal of an ERP standard constant current regulator (U2), and the negative terminal is also connected to a sixth resistor (R5) to the RV terminal of the ERP standard constant current regulator (U2), and the OUT terminal of the ERP standard constant current regulator (U2) is connected to a first capacitor (C1) to a ground terminal; the first LED lamp bead (L1) to the nth LED lamp bead (Ln) adopts lamp beads with a color temperature range of 1000K-10000K.

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