Ceiling lamp control circuit

Abstract

The invention discloses a ceiling lamp control circuit, which relates to the technical field of ceiling lamp control, and comprises an EMC (Electro Magnetic Compatibility) rectifying and filtering circuit, an alternating current signal detection circuit, a power factor circuit, a dual-channel constant current circuit, a constant voltage circuit and a control circuit, the EMC rectification filter circuit is electrically connected with the power factor circuit, a power factor is electrically connected with the dual-channel constant current circuit, the power factor is electrically connected with the constant voltage circuit, the constant voltage circuit is electrically connected with the control circuit, the control circuit is electrically connected with the alternating current signal detection circuit, and the control circuit is electrically connected with the constant current circuit. The EMC rectifying and filtering circuit is electrically connected with the alternating current signal detection circuit, the power factor, the double-channel constant current circuit, the constant voltage circuit and the control circuit, the light state of the lamp is controlled through a wall switch, an infrared remote controller and a mobile phone app according to the using habit of a user, and the using convenience of the ceiling lamp is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ceiling lamp control, in particular to a ceiling lamp control circuit. Background Art

[0002] The ceiling lamp control circuit is a circuit system used to control the switch, brightness, color temperature and other functions of the ceiling lamp. When the user sends a control signal through a wall switch, remote control, mobile phone APP or voice recognition, the input interface of the ceiling lamp control circuit receives the signal, and the input interface transmits the signal to the control module. The single-chip microcomputer parses the signal and performs corresponding operations, such as turning the light on and off, adjusting the brightness, changing the color temperature, etc. The control module sends the corresponding control signal to the drive circuit through the output interface according to the operation instruction. The drive circuit adjusts the working state of the LED chip or lamp bead inside the ceiling lamp according to the control signal to achieve light adjustment. The user can adjust the brightness, color temperature and other parameters of the ceiling lamp in real time by sending the control signal again to meet the usage requirements of different scenarios. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ceiling lamp control circuit comprises an EMC rectifier and filter circuit, an AC signal detection circuit, a power factor circuit, a dual-channel constant current circuit, a constant voltage circuit, a control circuit and an LED interface, wherein the EMC rectifier and filter circuit is electrically connected to the AC signal detection circuit, the EMC rectifier and filter circuit is electrically connected to the power factor circuit, the power factor circuit is electrically connected to the dual-channel constant current circuit, the power factor circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the control circuit, the control circuit is electrically connected to the AC signal detection circuit, the control circuit is electrically connected to the constant current circuit, and the EMC rectifier and filter circuit is electrically connected to the AC signal detection circuit, the power factor circuit, the dual-channel constant current circuit, the constant voltage circuit and the control circuit respectively.

[0007] Further: the EMC rectifier and filter circuit is composed of the above components F1, VR1, CX1, L8, CX2, L2, D2 and CB1 to form an EMC rectifier and filter circuit, the F1 and VR1 form an overcurrent and overvoltage protection circuit, the four components CX1, L8, CX2, L2 form a two-stage filter circuit to solve electromagnetic interference (EMI), the two components D2 and CB1 form a rectifier and filter, and CB1 is used to suppress the high-frequency noise of the voltage.

[0008] Furthermore: the AC signal detection circuit is composed of six components, namely D7, R14, R16, R17, Q1 and R15, forming an AC signal recognition circuit.

[0009] Further: the power factor circuit is composed of T4, D3, U2 and an external circuit, wherein U2 forms a voltage detection circuit with R30, R3, R6, R11 and C9, wherein C9 forms a low-pass filter with R30, R3 and R30, C9 and U2 link GND (P2) and FB (P1), the input signal of the FB detection circuit has a low-pass filter circuit, U2 and C10 link GND (P2) and VCC (P3), VCC filter circuit, R9 and R10 are used in parallel, link ISP (P4) and GND (P2), becoming a power limiting circuit, T4, D5 and R2 form an inductively coupled power supply circuit.

[0010] Further: the dual-channel constant current circuit is a dual-channel non-stroboscopic dimming circuit composed of 2 groups of BP2886X, and the dual-channel non-stroboscopic dimming photoelectric circuit is composed of a white light dimming circuit and a yellow light dimming circuit. The white light dimming photoelectric circuit is composed of U4, D8, T2, C15, R19, R22, R23, R20, and R26, and the yellow light dimming photoelectric circuit is composed of U3, D9, T3, C14, R18, R24, R25, R21, and R28, wherein T2 and T3 are energy storage inductors, C15 and C14 are output Filter capacitor, D8 and D9 are freewheeling diodes, U4 and U3 are MOS drive circuits, R19 and R18 are output dummy loads, R22 and R23 link CS (P8) and GND (P2) of U4, R24 and R25 link CS (P8) and GND (P2) of U3, forming an output current setting circuit, the reference voltage of the chip BP3886X is 300mV, Iled = reference voltage / Rcs, R26 and R20, R28 and R21 are PWM signal input absorption and current limiting protection resistors.

[0011] Further: the constant voltage circuit is composed of U1, C5, D4, D6, L3, C7, C8, and R4, and the constant voltage circuit is a 3.3V standby circuit, and its power supply control module is DL-K069, D4 links C7 and VCC (P3) to form an output voltage feedback circuit; U1's CS (P5) and GND (P1) are connected in parallel with R5 to form an output power protection circuit, and C7 (electrolytic) and C8 (magnetic sheet) are connected in parallel, and R4 is a dummy load of the output voltage, and its function is to stabilize the output voltage. When the load changes suddenly, the output voltage is relatively stable.

[0012] Further: the control circuit is DL-K069, and DL-K069 is a wall switch / WIFI / IR control module.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The ceiling lamp control circuit provided by the present invention can control the lighting state of the lamp by a wall switch, an infrared remote controller and a mobile phone app according to the user's usage habits, thereby improving the convenience of using the ceiling lamp.

[0015] The invention discloses a ceiling lamp control circuit which meets the standards of 5W<rated power<25W lighting equipment, harmonic current should not exceed the standard, and energy efficiency level.

[0016] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0017] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the circuit structure of the present invention;

[0020] Figure 2 The circuit diagram of the AC signal detection circuit of the present invention;

[0021] Figure 3 It is a circuit diagram of the power factor circuit of the present invention;

[0022] Figure 4 It is a circuit diagram of a dual-channel constant current circuit of the present invention;

[0023] Figure 5 The circuit diagram of the dual-channel constant current circuit D9 of the present invention;

[0024] Figure 6 It is a circuit diagram of a constant voltage circuit of the present invention;

[0025] Figure 7 The control circuit diagram of the present invention is

[0026] Figure 8 This is a logic block diagram of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] See also Figure 1-8The present invention provides a technical solution: a ceiling lamp control circuit, comprising: an EMC rectifier and filter circuit, an AC signal detection circuit, a power factor circuit, a dual-channel constant current circuit, a constant voltage circuit, a control circuit and an LED interface, wherein the EMC rectifier and filter circuit is electrically connected to the AC signal detection circuit, the EMC rectifier and filter circuit is electrically connected to the power factor circuit, the power factor circuit is electrically connected to the dual-channel constant current circuit, the power factor circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the control circuit, the control circuit is electrically connected to the AC signal detection circuit, and the control circuit is electrically connected to the constant The EMC rectifier and filter circuit are electrically connected to the AC signal detection circuit, the power factor circuit, the dual-channel constant current circuit, the constant voltage circuit, and the control circuit respectively. The EMC rectifier and filter circuit is composed of the above components F1, VR1, CX1, L8, CX2, L2, D2 and CB1 to form an EMC rectifier and filter circuit. F1 and VR1 form an overcurrent and overvoltage protection circuit. CX1, L8, CX2, L2, four components form a two-stage filter circuit to solve electromagnetic interference (EMI). D2 and CB1 form a rectifier and filter, and CB1 is used to suppress high-frequency noise of the voltage.

[0032] Among them, the preferred ones are Figure 2 The AC signal detection circuit is composed of six components, D7, R14, R16, R17, Q1 and R15, to form an AC signal recognition circuit. Using the principle of the 50Hz state grid, a signal is sent to the control module unit (DL_K069) every 0.02 seconds. D7 is used for single-wave rectification, and R14, R16, and R17 form a current-limiting voltage divider circuit. Using the 50Hz sinusoidal wave characteristics of the state grid, when the VR17 voltage is greater than 0.6V, Q1 starts to conduct, and the 3.3V voltage flows to GND through R15 and Q1. AC_S changes from a high level (3.3V) to a low level, forming a 50Hz signal. When the switch is closed, the AC_S signal is a high level (3.3V), which is used to judge the AC switch signal.

[0033] Preferably, see Figure 3 The power factor circuit is composed of T4, D3, U2 and external circuits, where U2, R30, R3, R6, R11 and C9 form a voltage detection circuit. Using the reference voltage 2.5V of U2, the output voltage parameter (2.5V / R11)*(R30+R3+R6+R11)≈400V is determined;

[0034] Among them, C9, R30, R3 and R30 form a low-pass filter, which plays a role of high-frequency filtering. C9 and U2 connect GND (P2) and FB (P1). The input signal of the FB detection circuit has a low-pass filter circuit, which improves the stability of the U2_FB (P1) detection level, so that there is a stable output voltage of 400V;

[0035] U2 and C10 connect GND (P2) and VCC (P3). The VCC filter circuit ensures that the chip U2 has a stable working voltage and that U2 works stably.

[0036] R9 and R10 are used in parallel to link ISP (P4) and GND (P2) to form a power limiting circuit. The peak current detection method is used to ensure the maximum output power of the BOOST circuit and play an over-power protection role.

[0037] T4, D5 and R2 form an inductive coupling power supply circuit. Using the transformer mutual inductance principle, according to the relationship between voltage and inductance turns, this circuit has about 17V to power U2, reducing the heating coefficient of the LDO inside U2 and improving the conversion efficiency of the power supply. After the user power factor is improved, the reactive power it absorbs from the power system will be reduced, which improves the efficiency of the active power of the power grid and improves the quality of the power grid. This circuit meets Harmonics–Class-C per IEC 61000-3-2:2018 / AMD1:2020 (including >=5Wand<=25W).

[0038] Preferably, see Figure Figure 4 and Figure 5 The dual-channel constant current circuit is a dual-channel non-stroboscopic dimming circuit composed of two groups of BP2886X, and the dual-channel non-stroboscopic dimming photoelectric circuit is composed of a white light dimming circuit and a yellow light dimming circuit. The white light dimming photoelectric circuit is composed of U4, D8, T2, C15, R19, R22, R23, R20, and R26, and the yellow light dimming photoelectric circuit is composed of U3, D9, T3, C14, R18, R24, R25, R21, and R28. Among them, T2 and T3 are energy storage inductors, C15 and C14 are output filter capacitors, D8 and D9 are freewheeling diodes, U4 and U3 are MOS drive circuits, and R19 and R18 are output dummy loads. When the circuit is turned off, it helps release the energy of the filter capacitors C15 and C14 to ensure that the load LED will not be slightly bright.

[0039] R22 and R23 connect CS (P8) and GND (P2) of U4, and R24 and R25 connect CS (P8) and GND (P2) of U3 to form an output current setting circuit;

[0040] The reference voltage of the chip BP3886X is 300mV, Iled = reference voltage / Rcs;

[0041] R26 and R20, R28 and R21 are PWM signal input absorption and current limiting protection resistors. PWM_C / PWM_W signals are input to U4 and U3 respectively. The LED output current is adjusted by adjusting the PWM duty cycle to control the LED brightness. According to different PWM duty cycles, the appropriate color temperature and brightness are adjusted. BP2886X is a high-precision buck-type LED constant current driver chip that supports 1%-100% PWM dimming input dimming. It adopts analog dimming control mode throughout the process and is designed for flicker-free and noise-free LED intelligent lighting applications. BP2886X has multiple protection functions, including LED open circuit protection, LED short circuit protection, chip temperature overheating regulation, etc. This application design uses BP2886F, with a single-channel maximum power of 35W and a maximum supported current of 500mA.

[0042] Preferably, see Figure 6 The constant voltage circuit is composed of U1, C5, D4, D6, L3, C7, C8, and R4, and the constant voltage circuit is a 3.3V standby circuit. Its power supply control module is DL-K069, in which SEL (P2) is connected to VCC (P3) to determine that the output voltage is 3.3V, and C5 is connected in parallel with VCC (P3) and GND (P1) of U1 to form a chip bootstrap circuit;

[0043] D4 connects C7 and VCC (P3) to form an output voltage feedback circuit; CS (P5) and GND (P1) of U1 are connected in parallel with R5 to form an output power protection circuit, and C7 (electrolytic) and C8 (magnetic sheet) are connected in parallel. Because the equivalent circuit inductance of the large capacitor is too large, the decoupling function of high-frequency electromagnetic interference is small. After the small-capacity high-voltage ceramic capacitor is connected in parallel, the high-frequency damage current will be short-circuited to the ground by the small capacitor because the equivalent circuit inductance of the high-voltage ceramic capacitor is small, thereby playing the role of decoupling the high-frequency damage of the switching power supply;

[0044] The dummy load of R4 output voltage is used to stabilize the output voltage. When the load changes suddenly, the output voltage is relatively stable, forming a BP2525X is an ultra-low standby power consumption non-isolated step-down constant voltage driver chip. Suitable for non-isolated power supplies with full voltage input, the BP2525X chip adopts multi-mode control technology and can supply power to VCC from the output voltage, effectively reducing the system standby power consumption, improving efficiency, and reducing the noise of the system when working under light load, low standby power consumption <20mW, fixed output voltage, selectable 3.3V or 5V voltage, output voltage accuracy 5%, integrated high-voltage startup and power supply circuit, excellent dynamic response, amplitude reduction modulation technology to reduce audio noise, frequency jitter technology to improve EMI, built-in soft start protection function, overload protection, short circuit protection, over-temperature protection, cycle-by-cycle current limiting.

[0045] Preferably, see Figure 7 and Figure 8 The control circuit is DL-K069, and DL-K069 is a wall switch / WIFI / IR control module, where U1 is an EMW3090 WIFI module, which supports 802.11b / g / n protocol, integrates ARM-CM4F core, wireless LAN media access control (WLAN MAC) / baseband / RF module, 256 kilobytes random access memory (RAM) / 2 megabytes flash memory (FLASH), using the advantages of WiFi connection and secondary development, the program to be executed can be written into the module, U2 is an infrared receiver, which receives the command sent by the infrared remote control, converts it into a corresponding communication signal through the output pin, and transmits it to U1 pin P11. U1 analyzes the communication signal and then executes the corresponding command, R4 is the pull-up resistor of the infrared receiver output pin, R3 is the output resistor of the infrared receiver output pin, C3, C4, R2 are the low-pass filter power supply circuit of the infrared receiver, C1, R1, C2 are the Π-type filter power supply circuit of the WIFI module, among which pin P10 is the AC signal detection pin. Each time an AC signal is input, the logic control of neutral light, warm light, and night light can be realized. P3 and P4 are PWM signal output pins, which control the white light of BP2886F and the yellow light dimming circuit of BP2886F respectively. J2 is the burn-in interface, and J5 is the connector interface.

[0046] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A ceiling lamp control circuit, characterized in that: include: EMC rectifier and filter circuit, AC signal detection circuit, power factor circuit, dual-channel constant current circuit, constant voltage circuit, control circuit and LED interface, the EMC rectifier and filter circuit is electrically connected to the AC signal detection circuit, the EMC rectifier and filter circuit is electrically connected to the power factor circuit, the power factor circuit is electrically connected to the dual-channel constant current circuit, the power factor circuit is electrically connected to the constant voltage circuit, the constant voltage circuit is electrically connected to the control circuit, the control circuit is electrically connected to the AC signal detection circuit, the control circuit is electrically connected to the constant current circuit, the EMC rectifier and filter circuit is electrically connected to the AC signal detection circuit, the power factor circuit, the dual-channel constant current circuit, the constant voltage circuit and the control circuit respectively.

2. A ceiling lamp control circuit according to claim 1, characterized in that: The EMC rectifier and filter circuit is composed of the above components F1, VR1, CX1, L8, CX2, L2, D2 and CB1 to form an EMC rectifier and filter circuit; The F1 and VR1 form an over-current and over-voltage protection circuit, and the four components CX1, L8, CX2, and L2 form a two-stage filtering circuit to solve electromagnetic interference (EMI); The two components D2 and CB1 form a rectifier filter, and CB1 is used to suppress the high-frequency noise of the voltage.

3. A ceiling lamp control circuit according to claim 2, characterized in that: The AC signal detection circuit is composed of six components, namely D7, R14, R16, R17, Q1 and R15, forming an AC signal identification circuit.

4. A ceiling lamp control circuit according to claim 3, characterized in that: The power factor circuit is composed of T4, D3, U2 and an external circuit to form a power factor circuit; Wherein U2, R30, R3, R6, R11 and C9 form a voltage detection circuit; Among them, C9, R30, R3 and R30 form a low-pass filter, C9 and U2 connect GND (P2) and FB (P1), and the input signal of the FB detection circuit has a low-pass filter circuit; U2 and C10 connect GND (P2) and VCC (P3), VCC filter circuit; R9 and R10 are used in parallel to link ISP (P4) and GND (P2) to form a power limiting circuit; T4, D5 and R2 form an inductively coupled power supply circuit.

5. A ceiling lamp control circuit according to claim 4, characterized in that: The dual-channel constant current circuit is a dual-channel non-stroboscopic dimming circuit composed of two groups of BP2886X, and the dual-channel non-stroboscopic dimming photoelectric circuit is composed of a white light dimming circuit and a yellow light dimming circuit. The white light dimming photoelectric circuit is composed of U4, D8, T2, C15, R19, R22, R23, R20, and R26, and the yellow light dimming photoelectric circuit is composed of U3, D9, T3, C14, R18, R24, R25, R21, and R28, wherein T2 and T3 are energy storage inductors, C15 and C14 are output filter capacitors, D8 and D9 are freewheeling diodes, U4 and U3 are MOS drive circuits, and R19 and R18 are output dummy loads; R22 and R23 connect CS (P8) and GND (P2) of U4, and R24 and R25 connect CS (P8) and GND (P2) of U3 to form an output current setting circuit; The reference voltage of the chip BP3886X is 300mV, Iled = reference voltage / Rcs; R26 and R20, R28 and R21 are PWM signal input absorption and current limiting protection resistors.

6. A ceiling lamp control circuit according to claim 5, characterized in that: The constant voltage circuit is composed of U1, C5, D4, D6, L3, C7, C8, and R4, and the constant voltage circuit is a 3.3V standby circuit, and its power supply control module is DL-K069; D4 links C7 and VCC (P3) to form an output voltage feedback circuit; U1's CS (P5) and GND (P1) are connected in parallel with R5 to form an output power protection circuit, and C7 (electrolytic) and C8 (magnetic sheet) are connected in parallel to reduce ESR and output ripple; R4 is a dummy load for the output voltage, which stabilizes the output voltage. When the load changes suddenly, the output voltage is relatively stable.

7. According to claim 6, a ceiling lamp control circuit is characterized in that: The control circuit is DL-K069, and DL-K069 is a wall switch / WIFI / IR control module.

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