Double-PUSH and double-stepless dimming and color temperature adjusting multipath constant current output LED power supply

Abstract

The utility model discloses a dual-PUSH and dual-stepless dimming and color temperature adjusting multipath constant current output LED power supply. The LED power supply comprises a main circuit, a main control module, a first DC-DC module, a second DC-DC module, a first PUSH dimming module, a second PUSH dimming module, a first stepless dimming module, a second stepless dimming module and an output channel selection module. The first PUSH light modulation module and the second PUSH light modulation module are connected with the main control module and are respectively connected with the first PUSH light modulator and the second PUSH light modulator. The first stepless dimming module and the second stepless dimming module are connected with the main control module and are respectively connected with the first stepless dimmer and the second stepless dimmer; the output channel selection module is connected with the main control module; through the above structure, various combination output selections can be realized, so that one power supply can be compatible with various light modulators, the application range of the power supply is improved, SKUs of manufacturers and dealers are effectively reduced, preparation of many stock is not needed, and the occupied area of a warehouse is reduced.

Description

Technical Field

[0001] The utility model relates to the field of LED power supplies, in particular to a multi-channel constant current output LED power supply with dual PUSH and dual stepless dimming and color temperature adjustment functions. Background Art

[0002] Currently in the LED industry, constant current dimming and color temperature adjustment drivers have a large market share, and drivers that achieve constant current dimming and color temperature adjustment are widely used and favored by the market. While existing dimmers on the market can achieve dimming and color temperature adjustment, these dimmers are all one type of dimmer corresponding to one type of dimming and color temperature adjustment driver. Dimming and color temperature adjustment drivers are not compatible with multiple dimmers, which will increase the SKUs of manufacturers and distributors and increase the warehouse space. Therefore, there is an urgent need for a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED driver to solve the above problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a multi-channel constant current output LED power supply with dual PUSH and dual stepless dimming and color temperature adjustment.

[0004] An embodiment of the present invention solves the technical problem by adopting a technical solution: a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply, comprising a main circuit, a main control module, a first DC-DC module, a second DC-DC module, a first PUSH dimming module, a second PUSH dimming module, a first stepless dimming module, a second stepless dimming module, and an output channel selection module;

[0005] The main circuit is connected to the external power supply, the first DC-DC module, the second DC-DC module and the main control module, and the load is connected between the output ends of the first DC-DC module and the second DC-DC module;

[0006] The first PUSH dimming module is connected to the main control module and connected to the first PUSH dimmer, and the second PUSH dimming module is connected to the main control module and connected to the second PUSH dimmer;

[0007] The first stepless dimming module is connected to the main control module and is connected to the first stepless dimmer, and the second stepless dimming module is connected to the main control module and is connected to the second stepless dimmer;

[0008] The output channel selection module is connected to the main control module and is used to select the output channel and output mode.

[0009] As one of the preferred embodiments of the present utility model, the first DC-DC module includes a DC-DC dimming chip U4, a MOS tube Q1, a diode D1, an inductor L1 and resistors R1-R2, one end of the resistor R1 is respectively connected to the first output end of the main circuit and the cathode of the diode D1, the other end of the resistor R1 is connected to the input end of the DC-DC dimming chip U4, the anode of the diode D1 is respectively connected to one end of the inductor L1 and the drain of the MOS tube Q1, the other end of the inductor L1 is connected to one end of the load, the gate of the MOS tube Q1 is connected to the output end of the DC-DC dimming chip U4, and the source of the MOS tube Q1 is connected to the PGND end.

[0010] As one of the preferred embodiments of the present invention, the first PUSH dimming module includes a fuse FU1, a rectifier bridge DB1, an optocoupler DU2, resistors R17-R18 and diodes D3-D4, one end of the fuse FU1 is connected to one end of the first PUSH dimmer, the other end of the fuse FU1 is connected to the fourth end of the rectifier bridge DB1, the second end of the rectifier bridge DB1 is connected to the other end of the first PUSH dimmer, the first end of the rectifier bridge DB1 is connected to the cathode of the diode D3 and one end of the optocoupler DU2 light emitter through the resistor R18, the third end of the rectifier bridge DB1 is connected to the anode of the diode D3 and the other end of the optocoupler DU2 light emitter through the diode D4, one end of the optocoupler DU2 light receiver is connected to one end of the resistor R17 and the main control module, the other end of the optocoupler DU2 light receiver is connected to the PGND end, and the other end of the resistor R17 is connected to the VCC end.

[0011] As one of the preferred embodiments of the present invention, the first stepless dimming module and the second stepless dimming module are configured as a 0-10V dimming module, a 1-10V dimming module, a 10VPWM dimming module or a potentiometer dimming module.

[0012] As one of the preferred embodiments of the present utility model, the first stepless dimming module includes a dimming chip U2, an optocoupler DU1, capacitors C5-C6 and resistors R15-R16. The fourth pin of the dimming chip U2 is connected to the V0-10 terminal, and the third pin of the dimming chip U2 is respectively connected to one end of the first stepless dimmer and one end of the capacitor C5. The other end of the capacitor C5 is respectively connected to the other end of the first stepless dimmer, one end of the capacitor C6, one end of the optocoupler DU1 light emitter, the fifth pin of the dimming chip U2 and the SGND terminal. The eighth pin of the dimming chip U2 is connected to the other end of the capacitor C6, and the other end of the optocoupler DU1 light emitter is connected to the sixth pin of the dimming chip U2 via the resistor R16. One end of the optocoupler DU1 light receiver is connected to the main control module and to the VCC terminal via the resistor R15. The other end of the optocoupler DU1 light receiver is connected to the FGND terminal.

[0013] As one of the preferred embodiments of the present utility model, the output channel selection module includes a switch S1, a resistor R21 and a resistor R30, one end of the resistor R21 is connected to the VCC terminal, the other end of the resistor R21 is connected to the main control module and one end of the resistor R30 through the switch S1, and the other end of the resistor R30 is connected to the PGND terminal.

[0014] As one of the preferred embodiments of the present utility model, a dual PUSH and dual stepless dimming and color temperature adjustment multi-channel constant current output LED power supply also includes a first output overload protection module and a second output overload protection module. The first input end of the first output overload protection module is connected between the first DC-DC module and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module. The first input end of the second output overload protection module is connected between the second DC-DC module and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module.

[0015] As one of the preferred embodiments of the present utility model, the first output overload protection module includes an operational amplifier U1A, a capacitor C1 and resistors R5-R8, the non-inverting input terminal of the operational amplifier U1A is respectively connected to one end of the resistor R5 and one end of the resistor R6, the other end of the resistor R5 and the ground terminal of the operational amplifier U1A are connected to the PGND terminal, the other end of the resistor R6 is connected to the other end of the load, the inverting input terminal of the operational amplifier U1A is respectively connected to one end of the resistor R8 and one end of the resistor R10, the other end of the resistor R8 is respectively connected to the first DC-DC module and one end of the load, the other end of the resistor R10 is respectively connected to the output terminal of the operational amplifier U1A and one end of the resistor R7, the other end of the resistor R7 is respectively connected to the main control module and one end of the capacitor C1, and the power supply terminal of the operational amplifier U1A is connected to the VCC terminal.

[0016] As one of the preferred embodiments of the present invention, a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply further includes a power selection module connected to the main control module.

[0017] As one of the preferred embodiments of the present invention, a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply further includes a low-power module connected to the main control module.

[0018] The beneficial effects of the utility model are as follows: a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply, comprising a main circuit, a main control module, a first DC-DC module, a second DC-DC module, a first PUSH dimming module, a second PUSH dimming module, a first stepless dimming module, a second stepless dimming module and an output channel selection module; the main circuit is connected to an external power supply, the first DC-DC module, the second DC-DC module and the main control module, and the load is connected between the output ends of the first DC-DC module and the second DC-DC module; the first PUSH dimming module is connected to the main control module The first PUSH dimmer is connected to the main control module and connected to the second PUSH dimmer; the first stepless dimming module is connected to the main control module and connected to the first stepless dimmer, and the second stepless dimming module is connected to the main control module and connected to the second stepless dimmer; the output channel selection module is connected to the main control module to select the output channel and output mode; the above structure can realize a variety of combined output selections, so that one power supply can be compatible with multiple dimmers, which improves the scope of use of the power supply, effectively reduces the SKUs of manufacturers and distributors, does not need to prepare a lot of inventory, and reduces the warehouse area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a functional block diagram of a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply;

[0021] Figure 2 This is a circuit schematic diagram of a dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply;

[0022] Figure 3 is a circuit schematic diagram of the first DC-DC module;

[0023] Figure 4 is a circuit schematic diagram of the second DC-DC module;

[0024] Figure 5 This is a circuit schematic diagram of the first PUSH dimming module;

[0025] Figure 6 This is the circuit schematic diagram of the second PUSH dimming module;

[0026] Figure 7 This is a circuit diagram of the first stepless dimming module;

[0027] Figure 8 This is a circuit schematic diagram of the second stepless dimming module;

[0028] Figure 9 This is a circuit schematic diagram of the first output overload protection module;

[0029] Figure 10 This is a circuit schematic diagram of the second output overload protection module;

[0030] Figure 11 This is the circuit schematic diagram of the low power module;

[0031] Figure 12 This is the circuit schematic diagram of the temperature protection module;

[0032] Figure 13 This is the circuit schematic diagram of the power selection module;

[0033] Figure 14 Schematic diagram of the circuit for the output channel selection module. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of this utility model, "above," "below," and "within" are understood to be exclusive of the number indicated, while "above," "below," and "within" are understood to be inclusive of the number indicated. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0038] Reference Figures 1 to 14 A dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply includes a main circuit 10, a main control module 20, a first DC-DC module 31, a second DC-DC module 32, a first PUSH dimming module 41, a second PUSH dimming module 42, a first stepless dimming module 51, a second stepless dimming module 52 and an output channel selection module 60;

[0039] The main circuit 10 is connected to an external power supply, a first DC-DC module 31, a second DC-DC module 32, and a main control module 20, and a load is connected between the output terminals of the first DC-DC module 31 and the second DC-DC module 32;

[0040] The first PUSH dimming module 41 is connected to the main control module 20 and is connected to the first PUSH dimmer, and the second PUSH dimming module 42 is connected to the main control module 20 and is connected to the second PUSH dimmer;

[0041] The first stepless dimming module 51 is connected to the main control module 20 and is connected to the first stepless dimmer, and the second stepless dimming module 52 is connected to the main control module 20 and is connected to the second stepless dimmer;

[0042] The output channel selection module 60 is connected to the main control module 20 and is used to select an output channel and an output mode.

[0043] In this utility model, the working principle is as follows:

[0044] 1)Reference Figure 1-Figure 2 When the system is powered on, AC power passes through the EMI filter circuit 91 and is then rectified into DC power by the rectifier bridge. When the main circuit 10 is operating stably, the output voltage loop feedback module 92 and the fixed turns ratio of the transformer output a stable voltage V+. The voltage HV passes through the conversion circuit in the voltage conversion module 93 and outputs stable DC voltages VCC and VDD.

[0045] 2)Reference Figure 1-Figure 4 In some embodiments, the first DC-DC module 31 includes a DC-DC dimming chip U4, a MOS transistor Q1, a diode D1, an inductor L1, and resistors R1-R2. One end of the resistor R1 is respectively connected to the first output end of the main circuit 10 and the cathode of the diode D1, the other end of the resistor R1 is connected to the input end of the DC-DC dimming chip U4, the anode of the diode D1 is respectively connected to one end of the inductor L1 and the drain of the MOS transistor Q1, the other end of the inductor L1 is connected to one end of the load, the gate of the MOS transistor Q1 is connected to the output end of the DC-DC dimming chip U4, and the source of the MOS transistor Q1 is connected to the PGND end.

[0046] Specifically, the voltage V+ supplies power to the DC-DC dimming chip U4 through the resistor R1. When PWM1 is high, the MOS tube Q1 is turned on, and energy passes through V+, is externally connected to the positive electrode of LED2, and then returns to PGND through LED1, inductor L1, MOS tube Q1, and resistor R2; when PWM1 is low, the MOS tube Q1 is turned off, and energy flows from the drain of the MOS tube Q1 through the diode D1 and returns to V+ to complete the freewheeling.

[0047] The second DC-DC module 32 includes a DC-DC dimming chip U5, a MOS transistor Q2, a diode D2, an inductor L2 and resistors R3-R4. One end of the resistor R3 is respectively connected to the second output end of the main circuit 10 and the cathode of the diode D2, and the other end of the resistor R3 is connected to the input end of the DC-DC dimming chip U5. The anode of the diode D2 is respectively connected to one end of the inductor L2 and the drain of the MOS transistor Q2. The other end of the inductor L2 is connected to one end of the load. The gate of the MOS transistor Q2 is connected to the output end of the DC-DC dimming chip U5, and the source of the MOS transistor Q2 is connected to the PGND end.

[0048] Specifically, the voltage V+ supplies power to the DC-DC dimming chip U5 through the resistor R3. When PWM2 is high, during the on-phase of the MOS tube Q2, energy passes through V+, is externally connected to the positive electrode of the LED4, and then returns to PGND through the LED3, the inductor L2, the MOS tube Q2, and the resistor R4. When PWM1 is low, during the off-phase of the MOS tube Q2, energy flows from the drain of the MOS tube Q2 through the diode D2 and returns to V+ to complete the freewheeling.

[0049] 3)Reference Figure 1-Figure 2 、 Figure 5-Figure 6The first PUSH dimming module is a first PUSH dimming or color temperature adjustment signal input. Preferably, the first PUSH dimming module 41 includes a fuse FU1, a rectifier bridge DB1, an optocoupler DU2, resistors R17-R18 and diodes D3-D4. One end of the fuse FU1 is connected to one end of the first PUSH dimmer, the other end of the fuse FU1 is connected to the fourth end of the rectifier bridge DB1, the second end of the rectifier bridge DB1 is connected to the other end of the first PUSH dimmer, and the first end of the rectifier bridge DB1 is connected to the cathode of the diode D3 through the resistor R18. And one end of the optocoupler DU2 light emitter, the third end of the rectifier bridge DB1 is connected to the anode of the diode D3 and the other end of the optocoupler DU2 light emitter through the diode D4, one end of the optocoupler DU2 light receiver is connected to one end of the resistor R17 and the main control module 20, the other end of the optocoupler DU2 light receiver is connected to the PGND end, and the other end of the resistor R17 is connected to the VCC end; the function of the diode D4 is to allow the PUSH signal to be unidirectionally conducted, the diode D3 is used to protect the optocoupler DU2, the resistor R18 is used to limit current, and the optocoupler DU2 is used to isolate signal transmission.

[0050] The second PUSH dimming module is the second PUSH dimming or color temperature adjustment signal input; specifically, the second PUSH dimming module includes a resistor R22, a resistor R26, a diode D5-D6, an optocoupler DU4, a rectifier bridge DB2 and a fuse FU2. One end of the second PUSH dimmer is connected to the fuse FU2 and then to the fourth end of the rectifier bridge DB2. The other end of the second PUSH dimmer is connected to the second end of the rectifier bridge DB2. The first end of the rectifier bridge DB2 is connected to one end of the resistor R26. The other end of the resistor R26 is connected to one end of the optocoupler DU4 light emitter and the diode D 5, the other end of the optocoupler DU4 light emitter is connected to the anode of diode D5 and the anode of diode D6 respectively, the cathode of diode D6 is connected to the third terminal of the rectifier bridge DB2, one end of the optocoupler DU4 light receiver is connected to one end of resistor R22 and the main control module 20 respectively, the other end of resistor R22 is connected to the VCC terminal, and the other end of the optocoupler DU4 light receiver is connected to the PGND terminal; the function of diode D6 is to make the PUSH signal unidirectional, the diode D5 is used to protect the optocoupler DU4, the resistor R26 is used for current limiting, and the optocoupler DU4 is used to isolate signal transmission.

[0051] 4)Reference Figure 1-Figure 2 、 Figure 7-Figure 8In some embodiments, the first stepless dimming module 51 and the second stepless dimming module 52 are set to be a 0-10V dimming module, a 1-10V dimming module, a 10VPWM dimming module or a potentiometer dimming module; preferably, the first stepless dimming module 51 includes a dimming chip U2, an optocoupler DU1, capacitors C5-C6 and resistors R15-R16, the fourth pin of the dimming chip U2 is connected to the V0-10 end, the third pin of the dimming chip U2 is respectively connected to one end of the first stepless dimmer and one end of the capacitor C5, the other end of the capacitor C5 is respectively connected to the other end of the first stepless dimmer, one end of the capacitor C6, the optocoupler One end of the DU1 light emitter is connected to the fifth pin of the dimming chip U2 and the SGND terminal. The eighth pin of the dimming chip U2 is connected to the other end of the capacitor C6. The other end of the optocoupler DU1 light emitter is connected to the sixth pin of the dimming chip U2 via the resistor R16. One end of the optocoupler DU1 light receiver is connected to the main control module 20 and to the VCC terminal via the resistor R15. The other end of the optocoupler DU1 light receiver is connected to the FGND terminal. The first stepless dimming module 51 is the first 0-10V dimming and color temperature adjustment signal input. The capacitor C5 is used for dimmer signal filtering, the resistor R16 is used for current limiting, and the optocoupler DU1 is used for isolating signal transmission.

[0052] The second stepless dimming module 52 is a second 0-10V dimming and color temperature adjustment signal input; specifically, the second stepless dimming module 52 includes a dimming chip U3, capacitors C7-C8, resistors R19-R20 and an optocoupler DU3. One end of the second 0-10V dimmer is connected to one end of the capacitor C7 and pin 3 of the dimming chip U3, respectively. The other end of the second 0-10V dimmer is connected to the other end of the capacitor C7, pin 5 of the dimming chip U3, one end of the capacitor C8, and one end of the optocoupler DU3 light emitter to the SGND end. The dimming chip U3 Pin 4 is connected to the V0-10 terminal, pin 8 of the dimming chip U3 is connected to the other end of the capacitor C8, pin 6 of the dimming chip U3 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to the other end of the optocoupler DU3 light emitter, one end of the resistor R19 is connected to the VCC terminal, and the other end of the resistor R19 is connected to one end of the optocoupler DU3 light receiver and the main control module 20 respectively, and the other end of the optocoupler DU3 light receiver is connected to the PGND terminal; capacitor C7 is used for dimmer signal filtering, resistor R20 is used for current limiting, and optocoupler DU3 is used to isolate signal transmission.

[0053] 5)Reference Figure 1-Figure 2The main control module 20 is respectively connected to the VCC terminal, the PGND terminal, the first PUSH dimming module 41, the second PUSH dimming module 42, the first stepless dimming module 51, the second stepless dimming module 52, the first output overload protection module 71, the second output overload protection module 72, the temperature detection module 93, the low power module 82, the power selection module 81, and the output channel selection module 60; it is mainly used to receive the first PUSH signal, the second PUSH signal, the OVP1 signal, the OVP2 signal, the first 0-10V dimming signal, the second 0-10V dimming signal, the temperature protection signal, the power selection signal and the output channel selection signal, and to send the low power signal, the PWM1 signal and the PWM2 signal.

[0054] 6)Reference Figure 1-Figure 2 、 Figure 12 The temperature protection module 94 is for internal temperature detection. Preferably, the temperature protection module includes a resistor R24, a capacitor C9, and a thermistor NTC1; one end of the resistor R24 ​​is connected to the VCC terminal, and the other end of the resistor R24 ​​is respectively connected to the main control module 20, one end of the thermistor NTC1, and one end of the capacitor C9, and the other end of the thermistor NTC1 and the other end of the capacitor C9 are connected to the PGND terminal; when the internal temperature rises, the resistance value of the thermistor NTC1 changes, so that the voltage value of the temperature signal entering the main control module 20 also changes. When the voltage value of the temperature signal entering the main control module 20 exceeds the protection threshold, the main control module 20 controls the signal PWM1 and the signal PWM2 to halve the output or turns off the signal PWM1 and the signal PWM2, thereby achieving the power supply over-temperature protection mechanism.

[0055] 7)Reference Figure 1-Figure 2 、 Figure 13 When the power selection module 81 identifies different power sources, the corresponding output current values ​​are different. Preferably, the power selection module includes a resistor R25 and a resistor R28. One end of the resistor R25 is connected to the VCC terminal, one end of the resistor R28 is connected to the PGND terminal, and the other end of the resistor R25 is connected to the other end of the resistor R28 and the main control module 20 respectively. When different power sources are used, the resistance values ​​of the resistors R25 and R28 will also be different, and the voltage values ​​entering the main control module 20 after voltage division will also be different. The main control module 20 identifies the corresponding power according to the different input voltage values.

[0056] 8)Reference Figure 1-Figure 2 、 Figure 9-10A dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply also includes a first output overload protection module 71 and a second output overload protection module 72. The first input end of the first output overload protection module 71 is connected between the first DC-DC module 31 and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module 20. The first input end of the second output overload protection module 72 is connected between the second DC-DC module 32 and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module 20; the first output overload protection module 71 and the second output overload protection module 72 are used to detect the output load and enter the protection mode when overloaded.

[0057] Preferably, the first output overload protection module 71 includes an operational amplifier U1 A, a capacitor C1, and resistors R5-R8. The non-inverting input terminal of the operational amplifier U1 A is respectively connected to one end of the resistor R5 and one end of the resistor R6, the other end of the resistor R5 and the ground terminal of the operational amplifier U1 A are connected to the PGND terminal, the other end of the resistor R6 is connected to the other end of the load, the inverting input terminal of the operational amplifier U1 A is respectively connected to one end of the resistor R8 and one end of the resistor R10, the other end of the resistor R8 is respectively connected to the first DC-DC module 31 and one end of the load, the other end of the resistor R10 is respectively connected to the output terminal of the operational amplifier U1 A and one end of the resistor R7, the other end of the resistor R7 is respectively connected to the main control module 20 and one end of the capacitor C1, and the power supply terminal of the operational amplifier U1 A is connected to the VCC terminal; in the first output overload protection module 71, the operational amplifier U1 A functions as a differential proportional circuit. Therefore, the voltage across resistor R5 equals the voltage across resistor R10, and the voltage across resistor R6 equals the voltage across resistor R8. Therefore, the OVP1 voltage = (R5 / R6) * the voltage across the lamp (V+, CW-). According to this formula, as the voltage across the lamp (V+, CW-) increases, the OVP1 voltage also increases. When the voltage across the lamp (V+, CW-) exceeds the protection threshold, the OVP1 voltage also exceeds the protection threshold. Upon detecting the OVP1 overvoltage, the main control module 20 disables PWM1 or enters hiccup mode to protect the power supply.

[0058] Furthermore, the second output overload protection module includes an operational amplifier U1 B, a resistor R9, resistors R11-R14 and a capacitor C3. Pin 8 of the operational amplifier U1 B is connected to the VCC terminal, the V+ terminal of the lamp is connected to one end of the resistor R11, the other end of the resistor R11 is respectively connected to pin 5 of the operational amplifier U1 B and one end of the resistor R9, the WW- terminal of the lamp is connected to one end of the resistor R13, the other end of the resistor R13 is respectively connected to pin 6 of the operational amplifier U1 B and one end of the resistor R14, the other end of the resistor R14 is respectively connected to pin 7 of the operational amplifier U1B and one end of the resistor R12, the other end of the resistor R12 is respectively connected to the main control module 20 and one end of the capacitor C3, the other end of the capacitor C3 and the other end of the resistor R9 are connected to the PGND terminal; in the second output overload protection module 72, the operational amplifier U1 B is used as a differential proportional circuit. Therefore, the voltage across resistor R9 is equal to the voltage across resistor R14, and the voltage across resistor R11 is equal to the voltage across resistor R13. Therefore, the OVP2 voltage = (R9 / R11) * the voltage across the lamp (V+, WW-). According to the above formula, as the voltage across the lamp (V+, WW-) increases, the OVP2 voltage also increases. When the voltage across the lamp (V+, WW-) exceeds the protection threshold, the OVP2 voltage also exceeds the protection threshold. Upon receiving the OVP1 overvoltage signal, the main control module 20 disables PWM2 or implements hiccup mode to protect the power supply.

[0059] 9)Reference Figure 1-Figure 2 、 Figure 11The low-power module 82 is used to lower the VDD voltage and reduce power consumption when the dimmer is turned off or closed. Specifically, the low-power module 82 includes a resistor R23, a resistor R27, a resistor R29, a PMOS tube Q3, a capacitor C3 and an optocoupler DU5. One end of the resistor R29 is connected to the main control module 20, and the other end of the resistor R29 is connected to one end of the optocoupler DU5 light emitter. The other end of the optocoupler DU5 light emitter is connected to the PGND end. The VDD end is connected to one end of the resistor R23 and the drain of the PMOS tube Q3 respectively. The other end of the resistor R23 is connected to the gate of the PMOS tube Q3 and one end of the resistor R27 respectively. The other end of the resistor R27 is connected to one end of the optocoupler DU5 light receiver, the source of the PMOS tube Q3 is connected to the V0-10 end and one end of the capacitor C10 respectively, and the other end of the capacitor C10 and the other end of the optocoupler DU5 light receiver are connected to the SGND end; when the dimmer signal is normal, the main control module 20 sends a high signal through the resistor R29 to enter one end of the optocoupler DU5 light emitter, and then returns to the PGND end, the optocoupler DU5 light receiver end is turned on, at this time the gate of the PMOS tube Q3 is pulled low, the PMOS tube Q3 is turned on, the VDD end enters through the drain of the PMOS tube Q3, and the source of the PMOS tube Q3 outputs a voltage V 0-10 supplies power to the first stepless dimming module 51 and the second stepless dimming module 52, and the capacitor C10 is the filter capacitor of V 0-10. At this time, the power supply does not enter the low power consumption mode; when the dimmer signal is turned off, the main control module 20 sends a low signal through the resistor R29 to enter one end of the optocoupler DU5 light emitter, and then returns to the PGND end. The optocoupler DU5 light receiver end is not conductive. At this time, the gate of the PMOS tube Q3 is not pulled low, the PMOS tube Q3 is not conductive, the voltage V 0-10 has no output, and the first stepless dimming module 51 and the second stepless dimming module 52 cannot be powered. At this time, the power supply enters the low power consumption mode.

[0060] 10)Reference Figure 1-Figure 2 、 Figure 14 The output channel selection module 60 can freely select one-channel dimming output or two-channel dimming and color temperature adjustment output. Specifically, the output channel selection module 60 includes a switch S1, a resistor R21, and a resistor R30. One end of the resistor R21 is connected to the VCC terminal, and the other end of the resistor R21 is connected to the main control module 20 and one end of the resistor R30 via the switch S1. The other end of the resistor R30 is connected to the PGND terminal. When the switch S1 is open, the main control module 20 receives a low signal, and the power supply enters the one-channel dimming output; when the switch S1 is closed, the main control module 20 receives a high signal, and the power supply enters the two-channel dimming and color temperature adjustment output.

[0061] 11) The advantages of the present invention are that the power supply structure can realize a variety of combined output options, including: ① one channel dimming output when connected to a single PUSH dimmer; ② two channels dimming and color temperature adjustment output when connected to two PUSH dimmers; ③ one channel dimming output when connected to a single 0-10V dimmer; ④ two channels dimming and color temperature adjustment output when connected to two 0-10V dimmers; ⑤ one channel dimming output when connected to a single PUSH dimmer and a single 0-10V dimmer; ⑥ two channels dimming and color temperature adjustment output when connected to two PUSH dimmers and two 0-10V dimmers, etc. The 0-10V dimming module can also be replaced by a 1-10V dimming module, a 10VPWM dimming module, or a potentiometer dimming module, which also fall within the scope of protection of the present invention. It has the advantages of simple power connection, low cost, stable performance, smooth dimming, and no flicker. When a PUSH dimmer and a 0-10V dimmer are connected at the same time, the dimmer with the smaller signal will be given priority. This allows one dimming and color temperature adjustment power supply to be compatible with multiple dimmers, widely expanding the scope of use of a power supply and effectively reducing the number of SKUs for manufacturers and distributors, eliminating the need to stock a lot of inventory and reducing warehouse space.

[0062] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A dual-PUSH and dual-stepless dimming and color temperature adjustment multi-channel constant current output LED power supply, characterized by: It comprises a main circuit (10), a main control module (20), a first DC-DC module (31), a second DC-DC module (32), a first PUSH dimming module (41), a second PUSH dimming module (42), a first stepless dimming module (51), a second stepless dimming module (52), and an output channel selection module (60); The main circuit (10) is connected to an external power supply, the first DC-DC module (31), the second DC-DC module (32), and the main control module (20), and the load is connected between the output ends of the first DC-DC module (31) and the second DC-DC module (32); The first PUSH dimming module (41) is connected to the main control module (20) and is connected to a first PUSH dimmer, and the second PUSH dimming module (42) is connected to the main control module (20) and is connected to a second PUSH dimmer; The first stepless dimming module (51) is connected to the main control module (20) and is connected to a first stepless dimmer, and the second stepless dimming module (52) is connected to the main control module (20) and is connected to a second stepless dimmer; The output channel selection module (60) is connected to the main control module (20) and is used to select an output channel and an output mode.

2. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The first DC-DC module (31) includes a DC-DC dimming chip U4, a MOS transistor Q1, a diode D1, an inductor L1, and resistors R1-R2, one end of the resistor R1 is respectively connected to the first output end of the main circuit (10) and the cathode of the diode D1, the other end of the resistor R1 is connected to the input end of the DC-DC dimming chip U4, the anode of the diode D1 is respectively connected to one end of the inductor L1 and the drain of the MOS transistor Q1, the other end of the inductor L1 is connected to one end of the load, the gate of the MOS transistor Q1 is connected to the output end of the DC-DC dimming chip U4, and the source of the MOS transistor Q1 is connected to the PGND end.

3. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The first PUSH dimming module (41) includes a fuse FU1, a rectifier bridge DB1, an optocoupler DU2, resistors R17-R18 and diodes D3-D4, one end of the fuse FU1 is connected to one end of the first PUSH dimmer, the other end of the fuse FU1 is connected to the fourth end of the rectifier bridge DB1, the second end of the rectifier bridge DB1 is connected to the other end of the first PUSH dimmer, the first end of the rectifier bridge DB1 is connected to the cathode of the diode D3 and one end of the optocoupler DU2 light emitter via the resistor R18, the third end of the rectifier bridge DB1 is connected to the anode of the diode D3 and the other end of the optocoupler DU2 light emitter via the diode D4, one end of the optocoupler DU2 light receiver is connected to one end of the resistor R17 and the main control module (20), the other end of the optocoupler DU2 light receiver is connected to the PGND end, and the other end of the resistor R17 is connected to the VCC end.

4. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The first stepless dimming module (51) and the second stepless dimming module (52) are configured as a 0-10V dimming module, a 1-10V dimming module, a 10VPWM dimming module or a potentiometer dimming module.

5. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The first stepless dimming module (51) includes a dimming chip U2, an optocoupler DU1, capacitors C5-C6 and resistors R15-R16, the fourth pin of the dimming chip U2 is connected to the V0-10 terminal, the third pin of the dimming chip U2 is respectively connected to one end of the first stepless dimmer and one end of the capacitor C5, the other end of the capacitor C5 is respectively connected to the other end of the first stepless dimmer, one end of the capacitor C6, one end of the optocoupler DU1 light emitter, the fifth pin of the dimming chip U2 and the SGND terminal, the eighth pin of the dimming chip U2 is connected to the other end of the capacitor C6, the other end of the optocoupler DU1 light emitter is connected to the sixth pin of the dimming chip U2 via the resistor R16, one end of the optocoupler DU1 light receiver is connected to the main control module (20) and connected to the VCC terminal via the resistor R15, and the other end of the optocoupler DU1 light receiver is connected to the FGND terminal.

6. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The output channel selection module (60) comprises a switch S1, a resistor R21 and a resistor R30, one end of the resistor R21 is connected to the VCC terminal, the other end of the resistor R21 is connected to the main control module (20) and one end of the resistor R30 via the switch S1, and the other end of the resistor R30 is connected to the PGND terminal.

7. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: The system further comprises a first output overload protection module (71) and a second output overload protection module (72), wherein the first input end of the first output overload protection module (71) is connected between the first DC-DC module (31) and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module (20); the first input end of the second output overload protection module (72) is connected between the second DC-DC module (32) and one end of the load, the second input end is connected to the other end of the load, and the output end is connected to the main control module (20).

8. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 7, characterized in that: The first output overload protection module (71) includes an operational amplifier U1A, a capacitor C1, and resistors R5-R8. The non-inverting input terminal of the operational amplifier U1A is respectively connected to one end of the resistor R5 and one end of the resistor R6. The other end of the resistor R5 and the ground terminal of the operational amplifier U1A are connected to the PGND terminal. The other end of the resistor R6 is connected to the other end of the load. The inverting input terminal of the operational amplifier U1A is respectively connected to one end of the resistor R8 and one end of the resistor R10. The other end of the resistor R8 is respectively connected to the first DC-DC module (31) and one end of the load. The other end of the resistor R10 is respectively connected to the output terminal of the operational amplifier U1A and one end of the resistor R7. The other end of the resistor R7 is respectively connected to the main control module (20) and one end of the capacitor C1. The power supply terminal of the operational amplifier U1A is connected to the VCC terminal.

9. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: It also includes a power selection module (81) connected to the main control module (20).

10. The LED power supply with dual push and dual stepless dimming and color temperature adjustment and multiple constant current outputs according to claim 1, characterized in that: It also includes a low-power consumption module (82) connected to the main control module (20).

Images