Novel European standard three-section dimming circuit

Abstract

The utility model relates to the technical field of light-emitting diode (LED) light control, in particular to a novel European standard three-section light modulation circuit, which comprises an input protection module, a rectification module, a filtering module, a driving module, a light modulation module and an LED lamp, the output end of the rectifier module is connected with the input end of the filter module and the input end of the dimming module, the output end of the filter module is connected with the input end of the dimming module, and the output end of the dimming module is connected with the LED lamp. The utility model aims to provide the novel European standard three-section dimming circuit, through a simple design architecture, the design architecture is composed of the new European standard main power chip and the three-section dimming module, and meanwhile, capacitive elements are added to adjust the requirements of new regulations such as phase, harmonic wave, stroboflash and the like, so as to meet all parameter requirements of the new European standard.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED light control technical field, concretely relates to a novel three -segment light modulation circuit of euro standard. BACKGROUND

[0002] At present, with the implementation of the new energy efficiency regulation IEC 61000-3-2:2019 standard of euro standard, the products of european market are all facing the situation of upgrading. The LED products with power above 5W need to meet the standard parameter requirements of new euro standard, and the old version of LED products need to work with adapter. Although the adapter can meet the new type of euro standard A energy efficiency demand, the cost of adapter is high, which affects the large-scale updating of LED products. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims at providing a novel three -segment light modulation circuit of euro standard, which is composed of new euro standard main power chip and three -segment light modulation module by simple design architecture, and the capacitive element is added to adjust the requirements of new regulation phase, harmonic, stroboscopic, etc., to meet all parameter requirements of new euro standard.

[0004] The utility model is implemented through the following technical solutions:

[0005] A novel three -segment light modulation circuit of euro standard, including input protection module, rectifier module, filter module, drive module, light modulation module and LED lamp, the input protection module is connected to the input end of rectifier module, the output end of rectifier module is connected with the input end of filter module and the input end of light modulation module respectively, the output end of filter module is connected with the input end of light modulation module, the output end of light modulation module is connected with LED lamp.

[0006] Wherein, the filter module includes capacitor CB1, inductance L1, capacitor E1 and capacitor E2, the capacitor CB1 is connected in parallel to the input end of rectifier module, one end of inductance L1 is connected with the output end of rectifier module and the positive pole of capacitor E1 respectively, the other end of inductance L1 is connected with the positive pole of capacitor E2, the negative pole of capacitor E1 and the negative pole of capacitor E2 are grounded.

[0007] Wherein, the drive module includes the chip U1 of model BP2861 and inductance T1, the output end of filter module is connected with the HV end of chip U1, the D end of chip U1 is connected with one end of inductance T1, the other end of inductance T1 is connected with LED lamp.

[0008] The light adjusting module comprises a chip U2 of S4723M type, a transistor Q1, a transistor Q2 and a resistor R4, the resistor R4 is connected between the input end of the rectifier module and the CLK end of the chip U2, the L1 end of the chip U2 is connected with the base of the transistor Q1, the L2 end of the chip U2 is connected with the base of the transistor Q2, the collector of the transistor Q1 and the collector of the transistor Q2 are connected with the CS end of the chip U1, and the emitter of the transistor Q1 and the emitter of the transistor Q2 are grounded.

[0009] The light adjusting module further comprises a capacitor C1, and the capacitor C1 is connected to the CLK end and the GND end of the chip U2.

[0010] The novel three-section light adjusting circuit has the advantages that:

[0011] The novel three-section light adjusting circuit has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model makes further explanation to the utility model with the drawings, but the embodiment in the drawings does not constitute any limit to the utility model, and other drawings can be obtained according to the following drawings without the premise of creative labor for ordinary skilled person in the art.

[0013] Figure 1 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from the description herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0015] At present, with the implementation of the new energy efficiency regulation IEC 61000-3-2:2019 standard of the European regulation, the products in the European market are all facing the situation of upgrading. The LED products with power above 5W need to meet the standard parameter requirements of the new European regulation, and the old version of the LED products need to work with the adapter. Although the adapter can meet the demand of the new European regulation A-class energy efficiency, the cost of the adapter is high, which affects the large-scale updating and replacement of the LED products.

[0016] To solve the above problems, the embodiment discloses a new three-section dimming circuit for European regulations, which is composed of a new main power chip for European regulations and a three-section dimming module by a simple design architecture, and a capacitive element is added to adjust the requirements of new regulations such as phase, harmonic, and stroboscopic, so as to meet all parameter requirements of new European regulations.

[0017] To solve the above problems, the embodiment discloses a new three-section dimming circuit for European regulations, which includes an input protection module, a rectifier module, a filter module, a driving module, a dimming module, and an LED lamp, the input protection module is electrically connected to the input end of the rectifier module, the output end of the rectifier module is connected to the input end of the filter module and the input end of the dimming module respectively, the output end of the filter module is connected to the input end of the dimming module, and the output end of the dimming module is connected to the LED lamp.

[0018] Specifically, the new three-section dimming circuit for European regulations includes an input protection module, a rectifier module, a filter module, a driving module, and a dimming module, which is composed of a new main power chip for European regulations and a three-section dimming module, and a capacitive element is added to adjust the requirements of new regulations such as phase, harmonic, and stroboscopic, so as to meet all parameter requirements of new European regulations.

[0019] In the embodiment, the input protection module is a fuse resistor F1, which plays a role of fusing and protecting the subsequent circuit in time when a large current occurs due to short circuit in the subsequent stage.

[0020] Further, the filter module includes a capacitor CB1, an inductor L1, a capacitor E1, and a capacitor E2, the capacitor CB1 is connected in parallel to the input end of the rectifier module, one end of the inductor L1 is connected to the output end of the rectifier module and the positive electrode of the capacitor E1 respectively, the other end of the inductor L1 is connected to the positive electrode of the capacitor E2, and the negative electrode of the capacitor E1 and the negative electrode of the capacitor E2 are grounded. In the embodiment, the inductor L1, the capacitor E1, and the capacitor E2 form a Π-type filter circuit, so that the pulsed direct current rectified is smoother, and a harmonic regulation circuit unit is formed by combining the CB1 capacitor at the input end; by adjusting the capacity value of the CB1 capacitor, the 3rd harmonic control is <86%, and the 5th harmonic control is <61%; by adjusting the capacity value of the E1 and E2 electrolytic capacitors, the phase <65 and no stroboscopic balance are achieved, and the circuit unit design meets the index requirements of the four elements parameters of the new regulations "phase, harmonic, stroboscopic, and displacement factor".

[0021] Further, the driving module includes a chip U1 with a model of BP2861 and an inductor T1, the output end of the filter module is connected to the HV end of the chip U1, the D end of the chip U1 is connected to one end of the inductor T1, and the other end of the inductor T1 is connected to the LED lamp.

[0022] In the embodiment, the rectifier module back bus passes through the Π type filter module back, is connected to the HV end of the chip U1, the high voltage starting chip works, the D end outputs the high level signal, drives the chip internal MOS tube to work, the inductor T1 stores the energy, the CS end of the chip U1 detects the output current to exceed the threshold value, then the MOS stops, the high frequency switch is provided through the MOS tube, the working voltage is provided for the LED, the design of low power consumption can improve the conversion efficiency > 90%, and the A level light efficiency requirement of the product is realized.

[0023] Further, the dimming module comprises a chip U2 of model S4723M, a triode Q1, a triode Q2, a resistor R4, a resistor R5 and a resistor R6, the resistor R5 and the resistor R6 are connected in series between the output end of the rectifier module and the VCC end of the chip U2, the resistor R4 is connected between the input end of the rectifier module and the CLK end of the chip U2, the L1 end of the chip U2 is connected with the base of the triode Q1, the L2 end of the chip U2 is connected with the base of the triode Q2, the collector of the triode Q1 and the collector of the triode Q2 are connected with the CS end of the chip U1, and the emitter of the triode Q1 and the emitter of the triode Q2 are grounded.

[0024] Further, the dimming module further comprises a capacitor C1, and the capacitor C1 is connected to the CLK end and the GND end of the chip U2.

[0025] In the embodiment, the resistor R5 and the resistor R6 are connected in series to divide voltage, then the VCC end of the U2 chip and the capacitor C1 are connected to GND; when the capacitor C1 charging voltage reaches 12V, the chip U2 starts to work; the CLK end of the chip U2 is connected with the resistor R4 to the N line of the AC input end, and the state of the switch is detected and judged through the AC signal, when the pin detects the input end switch, the chip U2 drives the MOS tube Q1 and the MOS tube Q2 at the L1 end and the L2 end respectively, and different powers are displayed, so that the three-stage dimming function is realized; the switching window time is set to 3.2S in the chip, and if the light-off time exceeds the switching window time, the next time the light is turned on, the state before the light is turned off is presented, and the memory function is realized.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A novel three-stage dimming circuit for European standards, characterized in that, The input protection module is electrically connected to the input end of the rectifier module, the output end of the rectifier module is connected with the input end of the filter module and the input end of the light adjusting module respectively, the output end of the filter module is connected with the input end of the light adjusting module, and the output end of the light adjusting module is connected with the LED lamp. The driving module comprises a chip U1 with a model of BP2861, and the light adjusting module comprises a chip U2 with a model of S4723M.

2. A novel three-stage dimming circuit for EU according to claim 1, characterized in that, The filter module comprises a capacitor CB1, an inductor L1, a capacitor E1 and a capacitor E2, the capacitor CB1 is connected in parallel with the input end of the rectifier module, one end of the inductor L1 is connected with the output end of the rectifier module and the positive pole of the capacitor E1 respectively, the other end of the inductor L1 is connected with the positive pole of the capacitor E2, and the negative pole of the capacitor E1 and the negative pole of the capacitor E2 are grounded.

3. A novel three-stage dimming circuit for EU according to claim 1, characterized in that, The driving module further comprises an inductor T1, the output end of the filter module is connected with the HV end of the chip U1, the D end of the chip U1 is connected with one end of the inductor T1, and the other end of the inductor T1 is connected with the LED lamp.

4. A novel three-stage dimming circuit for EU according to claim 3, characterized in that, The light adjusting module further comprises a triode Q1, a triode Q2 and a resistor R4, the resistor R4 is connected between the input end of the rectifier module and the CLK end of the chip U2, the L1 end of the chip U2 is connected with the base of the triode Q1, the L2 end of the chip U2 is connected with the base of the triode Q2, the collector of the triode Q1 and the collector of the triode Q2 are connected with the CS end of the chip U1, and the emitter of the triode Q1 and the emitter of the triode Q2 are grounded.

5. A novel three segment dimming circuit for EU according to claim 4, characterized in that, The light adjusting module further comprises a capacitor C1, and the capacitor C1 is connected with the CLK end and the GND end of the chip U2.

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