Control circuit compatible with silicon controlled rectifier dimming and wall switching color temperature

Abstract

The utility model relates to the technical field of dimming control, in particular to a control circuit compatible with silicon controlled rectifier dimming and wall switching color temperature, which comprises a low-end performance improvement unit, a wall switching control unit, a constant-current driving unit compatible with silicon controlled rectifier dimming and a load unit, the compatible silicon controlled rectifier dimming constant-current driving unit is electrically connected with the wall switching control unit and the load unit, the compatible silicon controlled rectifier dimming constant-current driving unit is used for judging whether a system is connected to a silicon controlled rectifier dimmer, and the low-end performance improving unit is electrically connected with the compatible silicon controlled rectifier dimming constant-current driving unit, the wall switching control unit and the load unit. The wall switching control unit is electrically connected with the load unit, and the low-end performance improvement unit enables the wall switching control unit to still have stable voltage when the silicon controlled rectifier dimmer is adjusted to low brightness, so that the misoperation of wall switching when the silicon controlled rectifier dimmer is adjusted to low brightness can be avoided, and the dimming compatibility and experience feeling are further improved.

Description

Technical Field

[0001] This utility model relates to the field of dimming control technology, and in particular to a control circuit that is compatible with silicon controlled rectifier dimming and wall-mounted color temperature switching. Background Technology

[0002] With the development of lighting products, multifunctional and high-performance products are popular, including wall-cut products compatible with SCR dimming. However, conventional wall-cut products compatible with SCR dimming currently trigger the wall-cut control function when dimmed to low brightness, which affects the user experience and dimming compatibility. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a control circuit that is compatible with SCR dimming and wall-switching color temperature, which can avoid the misoperation of wall-switching when dimming to low brightness, thereby improving dimming compatibility and user experience.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A control circuit compatible with SCR dimming and wall-switching color temperature includes a low-end performance enhancement unit, a wall-switching control unit, a SCR dimming constant current drive unit, and a load unit. The SCR dimming constant current drive unit is electrically connected to the wall-switching control unit and the load unit, respectively. The SCR dimming constant current drive unit is used to determine whether the system is connected to a SCR dimmer. The low-end performance enhancement unit is electrically connected to the SCR dimming constant current drive unit, the wall-switching control unit, and the load unit, respectively. The wall-switching control unit is electrically connected to the load unit. The low-end performance enhancement unit ensures that the wall-switching control unit still has a stable voltage when the SCR dimmer is adjusted to a low brightness.

[0006] Furthermore, the low-end performance enhancement unit includes a MOSFET Q3, a diode D2, and an electrolytic capacitor E3. The source of the MOSFET Q3 is electrically connected to the compatible thyristor dimming constant current drive unit and the load unit, respectively, and the drain of the MOSFET Q3 is electrically connected to the wall-cut control unit.

[0007] Furthermore, the low-end performance enhancement unit also includes a Zener diode ZD3, the anode of which is electrically connected to the gate of the MOSFET Q3, and the cathode of which is electrically connected to the drain of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the wall-cut control unit.

[0008] Furthermore, the low-end performance enhancement unit also includes a capacitor C5. One end of the capacitor C5 is electrically connected to the anode of the Zener diode ZD3 and the gate of the MOSFET Q3, respectively. The other end of the capacitor C5 is electrically connected to the source of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the load unit, respectively.

[0009] Furthermore, the compatible silicon controlled rectifier dimming constant current drive unit includes a chip IC1, the model of which is BP5178. The first pin of the chip IC1 is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit, respectively.

[0010] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors R4 and R5. The eighth pin of the chip IC1 is electrically connected to one end of resistor R4 and one end of resistor R5, respectively. The other end of resistor R4 is electrically connected to the other end of resistor R5, the low-end performance enhancement unit, and the wall-cutting control unit, respectively.

[0011] Furthermore, the compatible silicon controlled rectifier dimming constant current drive unit also includes a resistor R6, one end of which is electrically connected to the fifth pin of the chip IC1, and the other end of which is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit.

[0012] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors RS1, RS2, RS3, and RS4. One end of resistor RS1 is electrically connected to one end of resistor RS2 and the third pin of chip IC1. The other end of resistor RS1 is electrically connected to the other end of resistor RS2, one end of resistor RS3, one end of resistor RS4, and the fourth pin of chip IC1. The other end of resistor RS3 is electrically connected to the other end of resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1. The other ends of resistor RS3, resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1 are all grounded.

[0013] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors R1, R2, R3 and capacitor C1. One end of resistor R1 is electrically connected to one end of resistor R2, one end of resistor R3, one end of capacitor C1 and the first pin of chip IC1, respectively. The other end of resistor R1 is electrically connected to the other end of capacitor C1 and both the other ends of resistor R1 and capacitor C1 are grounded. The other end of resistor R2 is electrically connected to the other end of resistor R3, the low-end performance enhancement unit and the wall-cutting control unit, respectively.

[0014] Furthermore, the wall-cutting control unit includes a chip IC6, which is an S4225. The first pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the second pin of the chip IC6 is electrically connected to the compatible thyristor dimming constant current drive unit, the fourth pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the fifth pin of the chip IC6 is electrically connected to the sixth pin of the chip IC6 and the load unit, and the seventh pin of the chip IC6 is electrically connected to the eighth pin of the chip IC6 and the load unit.

[0015] The beneficial effects of this utility model are as follows:

[0016] This solution incorporates a low-end performance enhancement unit, a wall-cut control unit, a compatible SCR dimming constant current drive unit, and a load unit. The compatible SCR dimming constant current drive unit determines whether a SCR dimmer is connected to the system. When no SCR dimmer is detected, it shuts off the bleed current to reduce losses and improve system efficiency. When a SCR dimmer is detected, it automatically opens the bleed current to maintain normal operation of the SCR dimmer during dimming, thus improving SCR dimmer compatibility. The wall-cut control unit can control multiple load units by changing the switching state of the output port. The alternating on / off state of the circuit load is used to adjust the color temperature or power. When the SCR dimmer is adjusted to the low end (i.e., low brightness), the wall-cut control unit may misjudge and think that the power switch is off. Thus, when the SCR dimmer is adjusted to the high end, the wall-cut control unit will judge that the power switch is on and will switch the color temperature or power. This solution, by setting a low-end performance enhancement unit, ensures that there is still a stable voltage when the SCR dimmer is adjusted to the low end. This avoids the misoperation of the wall-cut control unit, improves dimming compatibility, and is simple, convenient, low-cost, and effective. Attached Figure Description

[0017] Figure 1 This is a connection block diagram of the control circuit for compatible silicon-controlled dimming and wall-mounted color temperature switching of this utility model.

[0018] Figure 2 This is a circuit diagram of the control circuit for compatible silicon controlled rectifier dimming and wall-mounted color temperature switching according to this utility model.

[0019] Label Explanation:

[0020] 1. Low-end performance enhancement unit; 2. Wall-cut control unit; 3. Compatible thyristor dimming constant current drive unit; 4. Load unit; 5. Rectifier and filter unit. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figure 1 A control circuit compatible with SCR dimming and wall-switching color temperature includes a low-end performance enhancement unit, a wall-switching control unit, a SCR dimming constant current drive unit, and a load unit. The SCR dimming constant current drive unit is electrically connected to the wall-switching control unit and the load unit, respectively. The SCR dimming constant current drive unit is used to determine whether the system is connected to a SCR dimmer. The low-end performance enhancement unit is electrically connected to the SCR dimming constant current drive unit, the wall-switching control unit, and the load unit, respectively. The wall-switching control unit is electrically connected to the load unit. The low-end performance enhancement unit ensures that the wall-switching control unit still has a stable voltage when the SCR dimmer is adjusted to a low brightness.

[0023] As can be seen from the above description, the beneficial effects of this utility model are as follows:

[0024] This solution incorporates a low-end performance enhancement unit, a wall-cut control unit, a compatible SCR dimming constant current drive unit, and a load unit. The compatible SCR dimming constant current drive unit determines whether a SCR dimmer is connected to the system. When no SCR dimmer is detected, it shuts off the bleed current to reduce losses and improve system efficiency. When a SCR dimmer is detected, it automatically opens the bleed current to maintain normal operation of the SCR dimmer during dimming, thus improving SCR dimmer compatibility. The wall-cut control unit can control multiple load units by changing the switching state of the output port. The alternating on / off state of the circuit load is used to adjust the color temperature or power. When the SCR dimmer is adjusted to the low end (i.e., low brightness), the wall-cut control unit may misjudge and think that the power switch is off. Thus, when the SCR dimmer is adjusted to the high end, the wall-cut control unit will judge that the power switch is on and will switch the color temperature or power. This solution, by setting a low-end performance enhancement unit, ensures that there is still a stable voltage when the SCR dimmer is adjusted to the low end. This avoids the misoperation of the wall-cut control unit, improves dimming compatibility, and is simple, convenient, low-cost, and effective.

[0025] Furthermore, the low-end performance enhancement unit includes a MOSFET Q3, a diode D2, and an electrolytic capacitor E3. The source of the MOSFET Q3 is electrically connected to the compatible thyristor dimming constant current drive unit and the load unit, respectively, and the drain of the MOSFET Q3 is electrically connected to the wall-cut control unit.

[0026] As can be seen from the above description, by making the MOSFET Q3 operate in the variable resistance region, a stable operating current can be ensured for the load, especially at the low end, without jitter, thereby improving dimming compatibility; diode D2 can ensure that the operation of the compatible thyristor dimming constant current drive unit is not affected by the electrolytic capacitor E3.

[0027] Furthermore, the low-end performance enhancement unit also includes a Zener diode ZD3, the anode of which is electrically connected to the gate of the MOSFET Q3, and the cathode of which is electrically connected to the drain of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the wall-cut control unit.

[0028] Furthermore, the low-end performance enhancement unit also includes a capacitor C5. One end of the capacitor C5 is electrically connected to the anode of the Zener diode ZD3 and the gate of the MOSFET Q3, respectively. The other end of the capacitor C5 is electrically connected to the source of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the load unit, respectively.

[0029] As can be seen from the above description, the function of capacitor C5 and Zener diode ZD3 is to provide a suitable operating voltage for MOSFET Q3, so that MOSFET Q3 can work in the variable resistance region, ensuring a stable operating current for the load, especially at the low end, so that the light does not jitter and improves dimming compatibility.

[0030] Furthermore, the compatible silicon controlled rectifier dimming constant current drive unit includes a chip IC1, the model of which is BP5178. The first pin of the chip IC1 is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit, respectively.

[0031] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors R4 and R5. The eighth pin of the chip IC1 is electrically connected to one end of resistor R4 and one end of resistor R5, respectively. The other end of resistor R4 is electrically connected to the other end of resistor R5, the low-end performance enhancement unit, and the wall-cutting control unit, respectively.

[0032] As can be seen from the above description, resistors R4 and R5 can improve the lightning protection capability of chip IC1.

[0033] Furthermore, the compatible silicon controlled rectifier dimming constant current drive unit also includes a resistor R6, one end of which is electrically connected to the fifth pin of the chip IC1, and the other end of which is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit.

[0034] As can be seen from the above description, chip IC1 monitors the output status through resistor R6 to adjust the output current, ensuring a good linear regulation rate.

[0035] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors RS1, RS2, RS3, and RS4. One end of resistor RS1 is electrically connected to one end of resistor RS2 and the third pin of chip IC1. The other end of resistor RS1 is electrically connected to the other end of resistor RS2, one end of resistor RS3, one end of resistor RS4, and the fourth pin of chip IC1. The other end of resistor RS3 is electrically connected to the other end of resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1. The other ends of resistor RS3, resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1 are all grounded.

[0036] As can be seen from the above description, resistors RS1, RS2, RS3 and RS4 are used together to set the discharge current, and resistors RS3 and RS4 are used together to set the load current.

[0037] Furthermore, the compatible thyristor dimming constant current drive unit also includes resistors R1, R2, R3 and capacitor C1. One end of resistor R1 is electrically connected to one end of resistor R2, one end of resistor R3, one end of capacitor C1 and the first pin of chip IC1, respectively. The other end of resistor R1 is electrically connected to the other end of capacitor C1 and both the other ends of resistor R1 and capacitor C1 are grounded. The other end of resistor R2 is electrically connected to the other end of resistor R3, the low-end performance enhancement unit and the wall-cutting control unit, respectively.

[0038] As can be seen from the above description, resistors R1, R2, and R3 together form pull-up and pull-down resistors to monitor the input voltage, which is used by chip IC1 to determine whether the input is connected to the dimmer. Capacitor C1 plays the role of filtering and preventing interference.

[0039] Furthermore, the wall-cutting control unit includes a chip IC6, which is an S4225. The first pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the second pin of the chip IC6 is electrically connected to the compatible thyristor dimming constant current drive unit, the fourth pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the fifth pin of the chip IC6 is electrically connected to the sixth pin of the chip IC6 and the load unit, and the seventh pin of the chip IC6 is electrically connected to the eighth pin of the chip IC6 and the load unit.

[0040] Please refer to Figure 1 and Figure 2 As shown, Embodiment 1 of this utility model is as follows:

[0041] Please refer to Figure 1A control circuit compatible with SCR dimming and wall-switching color temperature includes a low-end performance enhancement unit 1, a wall-switching control unit 2, a SCR dimming constant current drive unit 3, and a load unit 4. The SCR dimming constant current drive unit 3 is electrically connected to the wall-switching control unit 2 and the load unit 4, respectively. The SCR dimming constant current drive unit 3 is used to determine whether the system is connected to a SCR dimmer. The low-end performance enhancement unit 1 is electrically connected to the SCR dimming constant current drive unit 3, the wall-switching control unit 2, and the load unit 4, respectively. The wall-switching control unit 2 is electrically connected to the load unit 4. The low-end performance enhancement unit 1 ensures that the wall-switching control unit 2 maintains a stable voltage when the SCR dimmer is adjusted to a low brightness.

[0042] The low-end performance enhancement unit 1 includes a MOSFET Q3 (model DMG2302), a diode D2 (model ES1J), and an electrolytic capacitor E3 (capacitance value of 1μF). The source of the MOSFET Q3 is electrically connected to the compatible thyristor dimming constant current drive unit 3 and the load unit 4, respectively, and the drain of the MOSFET Q3 is electrically connected to the wall-cut control unit 2.

[0043] The low-end performance enhancement unit 1 also includes a Zener diode ZD3 (with a Zener voltage of 2.4V). The anode of the Zener diode ZD3 is electrically connected to the gate of the MOSFET Q3, and the cathode of the Zener diode ZD3 is electrically connected to the drain of the MOSFET Q3, the compatible thyristor dimming constant current drive unit 3, and the wall-cut control unit 2, respectively.

[0044] The low-end performance enhancement unit 1 also includes a capacitor C5. One end of the capacitor C5 is electrically connected to the anode of the Zener diode ZD3 and the gate of the MOSFET Q3, respectively. The other end of the capacitor C5 is electrically connected to the source of the MOSFET Q3, the compatible thyristor dimming constant current drive unit 3, and the load unit 4, respectively.

[0045] The compatible silicon controlled rectifier dimming constant current drive unit 3 includes a chip IC1, the model of which is BP5178. The first pin of the chip IC1 is electrically connected to the low-end performance enhancement unit 1 and the wall-cutting control unit 2, respectively.

[0046] The compatible silicon controlled thyristor dimming constant current drive unit 3 also includes resistors R4 (2kΩ) and R5 (2kΩ). The eighth pin of the chip IC1 is electrically connected to one end of resistor R4 and one end of resistor R5, respectively. The other end of resistor R4 is electrically connected to the other end of resistor R5, low-end performance enhancement unit 1 and wall-cutting control unit 2, respectively.

[0047] The compatible silicon controlled rectifier dimming constant current drive unit 3 also includes a resistor R6. One end of the resistor R6 is electrically connected to the fifth pin of the chip IC1, and the other end of the resistor R6 is electrically connected to the low-end performance enhancement unit 1 and the wall-cutting control unit 2.

[0048] The compatible thyristor dimming constant current drive unit 3 further includes resistors RS1 (2Ω), RS2, RS3 (3.9Ω), and RS4. One end of resistor RS1 is electrically connected to one end of resistor RS2 and the third pin of chip IC1. The other end of resistor RS1 is electrically connected to the other end of resistor RS2, one end of resistor RS3, one end of resistor RS4, and the fourth pin of chip IC1. The other end of resistor RS3 is electrically connected to the other end of resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1. The other ends of resistor RS3, RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1 are all grounded.

[0049] The compatible thyristor dimming constant current drive unit 3 also includes resistors R1, R2 (with a resistance value of 1.2MΩ), R3, and capacitor C1. One end of resistor R1 is electrically connected to one end of resistor R2, one end of resistor R3, one end of capacitor C1, and the first pin of chip IC1. The other end of resistor R1 is electrically connected to the other end of capacitor C1, and both the other ends of resistor R1 and capacitor C1 are grounded. The other end of resistor R2 is electrically connected to the other end of resistor R3, low-end performance enhancement unit 1, and wall-cutting control unit 2.

[0050] The thyristor-compatible dimming constant current drive unit 3 also includes an electrolytic capacitor E1 (capacitance value of 68μF) and a resistor R7. For the specific connection relationships between its components, please refer to [reference needed]. Figure 2 .

[0051] The wall-cutting control unit 2 includes a chip IC6, which is an S4225 chip. The first pin of the chip IC6 is electrically connected to the low-end performance enhancement unit 1, the second pin of the chip IC6 is electrically connected to the compatible thyristor dimming constant current drive unit 3, the fourth pin of the chip IC6 is electrically connected to the low-end performance enhancement unit 1, the fifth pin of the chip IC6 is electrically connected to the sixth pin of the chip IC6 and the load unit 4, and the seventh pin of the chip IC6 is electrically connected to the eighth pin of the chip IC6 and the load unit 4.

[0052] The wall-cutting control unit 2 also includes resistors R40 (30kΩ), R41 (30kΩ), and R42; capacitors C10 (2.2nF) and C11 (2.2μF); resistors R26 (1.5MΩ) and R28 (1.5MΩ). For the specific connection relationships between these components, please refer to [reference needed]. Figure 2 .

[0053] The load unit 4 can be a light source with different color temperatures, or a main and auxiliary lighting system with different power. In this embodiment, the load unit 4 includes LED A1, LED W1, LED A8, and LED W8. For the specific connection relationships between these components, please refer to [reference needed]. Figure 2 .

[0054] Please refer to Figure 1 It also includes a rectifier and filter unit 5, which is electrically connected to the compatible thyristor dimming constant current drive unit 3 and the low-end performance enhancement unit 1 respectively.

[0055] The rectifier and filter unit 5 includes a fuse resistor F1 (10Ω), a varistor RV1 (240V), a rectifier bridge BR1 (MB10F), and a diode D1 (ES1J). For the specific connections between these components, please refer to [reference needed]. Figure 2 Fuse resistor F1 provides overcurrent protection; fuse resistor F1 and varistor RV1 together provide surge protection; rectifier bridge BR1, as a full-wave rectifier, rectifies AC power into DC power; diode D1 uses its unidirectionality to prevent crosstalk between units.

[0056] The working principle of the aforementioned control circuit for compatible SCR dimming and wall-mounted color temperature switching is as follows:

[0057] The working principle of the wall-cut control unit 2 is to sequentially change the switching state of the two output ports according to the power switch being turned on and off, thereby achieving the alternating on and off of the two loads to adjust the color temperature or power. When the SCR dimmer is turned to the low end, the wall-cut control unit 2 will determine to turn off the power switch; when the SCR dimmer is turned to the high end, the wall-cut control unit 2 will determine to turn on the power switch. As a result, the wall-cut control unit 2 will activate, switching the color temperature or power. After adding diode D2 and electrolytic capacitor E3, when the SCR dimmer is turned to the low end, the electrolytic capacitor... Capacitor E3 provides a stable voltage to the wall-cut control unit 2, preventing it from being judged as turning off the power switch; diode D2 prevents electrolytic capacitor E3 from affecting the normal operation of the compatible thyristor dimming constant current drive unit 3; when the thyristor dimmer is adjusted to the low end, the load current becomes smaller and fluctuates more, and the light will jitter. The function of capacitor C5 and Zener diode ZD3 is to provide a suitable operating voltage to MOSFET Q3, so that MOSFET Q3 operates in the variable resistance region, ensuring that the load has a stable operating current, especially at the low end, so that the light does not jitter and improves dimming compatibility.

[0058] In the thyristor-compatible dimming constant current drive unit 3, chip IC1 detects whether the input has a dimmer through resistors R1, R2, R3, and capacitor C1. When a dimmer is detected, chip IC1 automatically opens the bleed current to improve thyristor dimmer compatibility; when chip IC1 detects no dimmer, it closes the bleed current to reduce losses and improve system efficiency. Chip IC1 sets the bleed current through resistors RS1, RS2, RS3, and RS4, and sets the load current through resistors RS3 and RS4. Chip IC1 monitors the output status and adjusts the output current through resistor R6 to ensure constant current output and give the system good linear regulation.

[0059] The IC6 chip in the wall-cut control unit 2 detects the input voltage through its own CLK pin to determine the power switch. When the power switch is activated, it switches the conduction of D1 and D2 pins, thereby changing the state of the load connected to D1 and D2 pins.

[0060] In summary, this utility model provides a control circuit compatible with SCR dimming and wall-switching color temperature. By setting up a low-end performance enhancement unit, a wall-switching control unit, a SCR dimming-compatible constant current drive unit, and a load unit, the SCR dimming-compatible constant current drive unit determines whether a SCR dimmer is connected to the system. When no SCR dimmer is detected, it shuts off the discharge current to reduce losses and improve system efficiency. When a SCR dimmer is detected, it automatically opens the discharge current to maintain normal operation of the SCR dimmer during dimming, thereby improving SCR dimmer compatibility. The wall-switching control unit can change the output... The switching state of the port enables the alternating on / off state of multiple loads within the load unit to achieve the purpose of adjusting color temperature or power. When the SCR dimmer is adjusted to the low end (i.e., low brightness), the wall-cut control unit will misjudge and think that the power switch is off. Thus, when the SCR dimmer is adjusted to the high end, the wall-cut control unit will judge that the power switch is on and will switch the color temperature or power. This solution, by setting up a low-end performance enhancement unit, ensures that there is still a stable voltage when the SCR dimmer is adjusted to the low end. This avoids the misoperation of the wall-cut control unit, improves dimming compatibility, and is simple, convenient, low-cost, and effective.

[0061] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A control circuit compatible with SCR dimming and wall-mounted color temperature switching, characterized in that, The system includes a low-end performance enhancement unit, a wall-cut control unit, a compatible SCR dimming constant current drive unit, and a load unit. The compatible SCR dimming constant current drive unit is electrically connected to the wall-cut control unit and the load unit, respectively. The compatible SCR dimming constant current drive unit is used to determine whether the system is connected to a SCR dimmer. The low-end performance enhancement unit is electrically connected to the compatible SCR dimming constant current drive unit, the wall-cut control unit, and the load unit, respectively. The wall-cut control unit is electrically connected to the load unit. The low-end performance enhancement unit ensures that the wall-cut control unit still has a stable voltage when the SCR dimmer is adjusted to a low brightness.

2. The control circuit compatible with SCR dimming and wall-mounted color temperature switching according to claim 1, characterized in that, The low-end performance enhancement unit includes a MOSFET Q3, a diode D2, and an electrolytic capacitor E3. The source of the MOSFET Q3 is electrically connected to the compatible thyristor dimming constant current drive unit and the load unit, respectively, and the drain of the MOSFET Q3 is electrically connected to the wall-cut control unit.

3. The control circuit compatible with SCR dimming and wall-mounted color temperature switching according to claim 2, characterized in that, The low-end performance enhancement unit also includes a Zener diode ZD3. The anode of the Zener diode ZD3 is electrically connected to the gate of the MOSFET Q3, and the cathode of the Zener diode ZD3 is electrically connected to the drain of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the wall-cut control unit, respectively.

4. The control circuit for compatible silicon controlled rectifier dimming and wall-mounted color temperature switching according to claim 3, characterized in that, The low-end performance enhancement unit also includes a capacitor C5. One end of the capacitor C5 is electrically connected to the anode of the Zener diode ZD3 and the gate of the MOSFET Q3, respectively. The other end of the capacitor C5 is electrically connected to the source of the MOSFET Q3, the compatible thyristor dimming constant current drive unit, and the load unit, respectively.

5. The control circuit for compatible silicon controlled rectifier dimming and wall-mounted color temperature switching according to claim 1, characterized in that, The compatible silicon controlled rectifier dimming constant current drive unit includes a chip IC1, the model of which is BP5178. The first pin of the chip IC1 is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit, respectively.

6. The control circuit for compatible SCR dimming and wall-mounted color temperature switching according to claim 5, characterized in that, The compatible thyristor dimming constant current drive unit also includes resistors R4 and R5. The eighth pin of the chip IC1 is electrically connected to one end of resistor R4 and one end of resistor R5, respectively. The other end of resistor R4 is electrically connected to the other end of resistor R5, the low-end performance enhancement unit, and the wall-cutting control unit, respectively.

7. The control circuit for compatible SCR dimming and wall-mounted color temperature switching according to claim 5, characterized in that, The compatible silicon controlled rectifier dimming constant current drive unit also includes a resistor R6. One end of the resistor R6 is electrically connected to the fifth pin of the chip IC1, and the other end of the resistor R6 is electrically connected to the low-end performance enhancement unit and the wall-cutting control unit.

8. The control circuit for compatible SCR dimming and wall-mounted color temperature switching according to claim 5, characterized in that, The compatible thyristor dimming constant current drive unit also includes resistors RS1, RS2, RS3, and RS4. One end of resistor RS1 is electrically connected to one end of resistor RS2 and the third pin of chip IC1. The other end of resistor RS1 is electrically connected to the other end of resistor RS2, one end of resistor RS3, one end of resistor RS4, and the fourth pin of chip IC1. The other end of resistor RS3 is electrically connected to the other end of resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1. The other ends of resistor RS3, resistor RS4, the ninth pin of chip IC1, and the sixth pin of chip IC1 are all grounded.

9. The control circuit for compatible silicon controlled rectifier dimming and wall-mounted color temperature switching according to claim 5, characterized in that, The compatible thyristor dimming constant current drive unit also includes resistors R1, R2, R3 and C1. One end of resistor R1 is electrically connected to one end of resistor R2, one end of resistor R3, one end of capacitor C1 and the first pin of chip IC1. The other end of resistor R1 is electrically connected to the other end of capacitor C1 and both the other ends of resistor R1 and capacitor C1 are grounded. The other end of resistor R2 is electrically connected to the other end of resistor R3, the low-end performance enhancement unit and the wall-cutting control unit.

10. The control circuit compatible with SCR dimming and wall-mounted color temperature switching according to claim 1, characterized in that, The wall-cutting control unit includes a chip IC6, which is model S4225. The first pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the second pin of the chip IC6 is electrically connected to the compatible thyristor dimming constant current drive unit, the fourth pin of the chip IC6 is electrically connected to the low-end performance enhancement unit, the fifth pin of the chip IC6 is electrically connected to the sixth pin of the chip IC6 and the load unit, and the seventh pin of the chip IC6 is electrically connected to the eighth pin of the chip IC6 and the load unit.

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