Segmented dimming lighting circuit

Abstract

The utility model relates to the technical field of dimming lighting, in particular to a segmented dimming lighting circuit, which comprises an LED driving module and an LED load module, the LED driving module comprises a dimming driving chip IC1 and a dimming control unit, the current output end of the dimming driving chip IC1 is electrically connected with the LED load module, and the dimming control unit is electrically connected with the LED load module. The dimming control unit is electrically connected with the chip selection end of the dimming driving chip IC1, so that the current output end of the dimming driving chip IC1 outputs different LED currents to drive the LED load module to enter a segmented dimming mode, and the purpose of segmented dimming is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dimming lighting, in particular to a segmented dimming lighting circuit. Background Art

[0002] With the popularity of smart lighting products, dimming products are becoming popular. Currently, conventional dimming products are designed with ICs with DIM pins (i.e., brightness control pins). These products provide stepless dimming. However, many users only need segmented dimming, so stepless dimming is an overkill for them, which leads to higher costs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a segmented dimming lighting circuit, which can realize segmented dimming by using a common dimming lighting chip.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A segmented dimming lighting circuit includes an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into a segmented dimming mode.

[0006] Furthermore, the dimming control unit includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor RS1, a resistor RS2, a resistor RS3 and a resistor RS4, and the chip select end of the dimming driver chip IC1 is electrically connected to one end of the resistor RS1, one end of the resistor RS2, one end of the resistor RS3 and one end of the resistor RS4, respectively. The other end of the resistor RS1 is electrically connected to one end of the switch S1, and the other end of the switch S1 is electrically connected to one end of the switch S2, one end of the switch S3 and one end of the switch S4, and the other end of the switch S1, one end of the switch S2, one end of the switch S3 and one end of the switch S4 are all grounded. The other end of the switch S2 is electrically connected to the other end of the resistor RS2, the other end of the switch S3 is electrically connected to the other end of the resistor RS3, and the other end of the switch S4 is electrically connected to the other end of the resistor RS4.

[0007] Furthermore, the dimming control unit includes a resistor RS11, a resistor R19, a MOS transistor Q1, a resistor R12, a resistor R16, a resistor R20, a MOS transistor Q2, a resistor R17, a resistor R13, a resistor R21, a MOS transistor Q3, a resistor R18, and a resistor R15;

[0008] The chip select terminals of the dimming driver chip IC1 are electrically connected to one end of the resistor RS11, one end of the resistor R19, one end of the resistor R20, and one end of the resistor R21. The other end of the resistor RS11 is grounded. The other end of the resistor R19 is electrically connected to the drain of the MOS transistor Q1. The gate of the MOS transistor Q1 is electrically connected to one end of the resistor R12 and one end of the resistor R16. The other end of the resistor R20 is electrically connected to the drain of the MOS transistor Q2. The gate of the MOS transistor Q2 is electrically connected to one end of the resistor R17 and one end of the resistor R13. The other end of the resistor R21 is electrically connected to the drain of the MOS transistor Q3. The gate of the MOS transistor Q3 is electrically connected to one end of the resistor R18 and one end of the resistor R15 respectively. The other end of the resistor R16 is electrically connected to the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 respectively. The other end of the resistor R16, the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 are all grounded.

[0009] Furthermore, a wireless communication module is included, which is electrically connected to the other end of the resistor R12, the other end of the resistor R13, and the other end of the resistor R15 respectively.

[0010] Furthermore, the LED driver module further includes a resistor R7, one end of which is electrically connected to the on-time control end of the dimming driver chip IC1, and the other end of which is electrically connected to the dimming control unit and grounded.

[0011] Furthermore, the LED driver module further includes a resistor R8, one end of which is electrically connected to the over-temperature protection terminal of the dimming driver chip IC1, and the other end of which is electrically connected to the dimming control unit and grounded.

[0012] Furthermore, the LED driver module also includes a resistor R4, a resistor R9 and a resistor R10, one end of the resistor R4 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module, respectively, the other end of the resistor R4 is electrically connected to one end of the resistor R9, the other end of the resistor R9 is electrically connected to the overvoltage protection end of the dimming driver chip IC1 and one end of the resistor R10, respectively, the other end of the resistor R10 is electrically connected to the dimming control unit and the other end of the resistor R10 is grounded.

[0013] Furthermore, the LED driver module further includes a resistor R3, one end of which is electrically connected to the high voltage end of the dimming driver chip IC1, and the other end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module.

[0014] Furthermore, the LED driver module also includes an electrolytic capacitor E1, one end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module respectively, and the other end of the electrolytic capacitor E1 is electrically connected to the dimming control unit and the other end of the electrolytic capacitor E1 is grounded.

[0015] Furthermore, the LED driver module also includes an inductor L2, a diode D1 and a capacitor C5, one end of the inductor L2 is electrically connected to the current output end of the dimming driver chip IC1 and the anode of the diode D1, respectively, the other end of the inductor L2 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is electrically connected to the cathode of the diode D1 and the LED load module, respectively.

[0016] The beneficial effects of the present invention are:

[0017] This solution is provided with an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into the segmented dimming mode, thereby achieving the purpose of segmented dimming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a connection block diagram of the segmented dimming lighting circuit of the present utility model;

[0019] Figure 2 This is a circuit schematic diagram of Example 1 of the segmented dimming lighting circuit of the present utility model;

[0020] Figure 3 This is a circuit schematic diagram of the second embodiment of the segmented dimming lighting circuit of the present utility model;

[0021] Description of labels:

[0022] 1. LED driver module; 101. Dimming control unit; 2. LED load module; 3. Wireless communication module; 4. Rectifier and filter module; 5. Module power supply module. DETAILED DESCRIPTION

[0023] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0024] Please refer to Figure 1 , the technical solution adopted by this utility model is:

[0025] A segmented dimming lighting circuit includes an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into a segmented dimming mode.

[0026] From the above description, it can be seen that the beneficial effects of the present invention are:

[0027] This solution is provided with an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into the segmented dimming mode, thereby achieving the purpose of segmented dimming.

[0028] Furthermore, the dimming control unit includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor RS1, a resistor RS2, a resistor RS3 and a resistor RS4, and the chip select end of the dimming driver chip IC1 is electrically connected to one end of the resistor RS1, one end of the resistor RS2, one end of the resistor RS3 and one end of the resistor RS4, respectively. The other end of the resistor RS1 is electrically connected to one end of the switch S1, and the other end of the switch S1 is electrically connected to one end of the switch S2, one end of the switch S3 and one end of the switch S4, and the other end of the switch S1, one end of the switch S2, one end of the switch S3 and one end of the switch S4 are all grounded. The other end of the switch S2 is electrically connected to the other end of the resistor RS2, the other end of the switch S3 is electrically connected to the other end of the resistor RS3, and the other end of the switch S4 is electrically connected to the other end of the resistor RS4.

[0029] From the above description, we can know that by changing the resistance R of the chip select terminal of the dimming driver chip IC1 CS To change the current of the LED load module, resistors RS1, RS2, RS3 and RS4 are the corresponding resistors R CS Different resistance values, different resistors R CSThe resistance value can get different currents to achieve the purpose of segmented dimming; specifically: when the switch S1 is closed, the resistor RS1 acts as the resistor R CS Determine the current of the LED load module, and so on, close the corresponding switch, and the corresponding resistor is used as the resistor R CS To determine the current of the LED load module, two or more switches can be closed at the same time, and the corresponding two or more resistors can be used as the resistor R CS To determine the current of the LED load module, the number of switches and resistors required is determined by the number of dimming stages to be achieved.

[0030] Furthermore, the dimming control unit includes a resistor RS11, a resistor R19, a MOS transistor Q1, a resistor R12, a resistor R16, a resistor R20, a MOS transistor Q2, a resistor R17, a resistor R13, a resistor R21, a MOS transistor Q3, a resistor R18, and a resistor R15;

[0031] The chip select terminals of the dimming driver chip IC1 are electrically connected to one end of the resistor RS11, one end of the resistor R19, one end of the resistor R20, and one end of the resistor R21. The other end of the resistor RS11 is grounded. The other end of the resistor R19 is electrically connected to the drain of the MOS transistor Q1. The gate of the MOS transistor Q1 is electrically connected to one end of the resistor R12 and one end of the resistor R16. The other end of the resistor R20 is electrically connected to the drain of the MOS transistor Q2. The gate of the MOS transistor Q2 is electrically connected to one end of the resistor R17 and one end of the resistor R13. The other end of the resistor R21 is electrically connected to the drain of the MOS transistor Q3. The gate of the MOS transistor Q3 is electrically connected to one end of the resistor R18 and one end of the resistor R15 respectively. The other end of the resistor R16 is electrically connected to the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 respectively. The other end of the resistor R16, the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 are all grounded.

[0032] From the above description, it can be seen that setting the dimming control unit to the above structure can not only save a switch, but also achieve low standby power consumption. When the MOS tube Q1, MOS tube Q2 and MOS tube Q3 are all disconnected and the resistor RS11 is set to a relatively large resistance value, it can be concluded from the formula that the current of the LED load module is infinitely close to zero, which is equivalent to the whole machine entering the standby mode. When one or more of the MOS tubes Q1, MOS tube Q2 and MOS tube Q3 are closed, the corresponding one or more resistors together serve as the resistor R CS To determine the current of the LED load module, the number of switches and resistors required is determined by the number of dimming stages to be achieved.

[0033] Furthermore, a wireless communication module is included, which is electrically connected to the other end of the resistor R12, the other end of the resistor R13, and the other end of the resistor R15 respectively.

[0034] From the above description, it can be seen that by setting up a wireless communication module, it can be used to realize communication between the remote control or mobile phone APP and the LED driver module, so that the remote control or mobile phone can control the lighting, dimming and other functions of the LED load module.

[0035] Furthermore, the LED driver module further includes a resistor R7, one end of which is electrically connected to the on-time control end of the dimming driver chip IC1, and the other end of which is electrically connected to the dimming control unit and grounded.

[0036] From the above description, it can be seen that the resistor R7 is used to set the maximum on-time of the dimming driver chip IC1.

[0037] Furthermore, the LED driver module further includes a resistor R8, one end of which is electrically connected to the over-temperature protection terminal of the dimming driver chip IC1, and the other end of which is electrically connected to the dimming control unit and grounded.

[0038] From the above description, it can be seen that the resistor R8 is used to set the over-temperature protection point of the dimming driver chip IC1.

[0039] Furthermore, the LED driver module also includes a resistor R4, a resistor R9 and a resistor R10, one end of the resistor R4 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module, respectively, the other end of the resistor R4 is electrically connected to one end of the resistor R9, the other end of the resistor R9 is electrically connected to the overvoltage protection end of the dimming driver chip IC1 and one end of the resistor R10, respectively, the other end of the resistor R10 is electrically connected to the dimming control unit and the other end of the resistor R10 is grounded.

[0040] From the above description, it can be seen that the resistors R4 , R9 and R10 together set the overvoltage protection voltage of the dimming driver chip IC1 .

[0041] Furthermore, the LED driver module further includes a resistor R3, one end of which is electrically connected to the high voltage end of the dimming driver chip IC1, and the other end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module.

[0042] From the above description, it can be seen that the resistor R3 is a current limiting resistor used to supply power to the dimming driver chip IC1.

[0043] Furthermore, the LED driver module also includes an electrolytic capacitor E1, one end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module respectively, and the other end of the electrolytic capacitor E1 is electrically connected to the dimming control unit and the other end of the electrolytic capacitor E1 is grounded.

[0044] From the above description, it can be seen that the electrolytic capacitor E1 is used for output current filtering.

[0045] Furthermore, the LED driver module also includes an inductor L2, a diode D1 and a capacitor C5, one end of the inductor L2 is electrically connected to the current output end of the dimming driver chip IC1 and the anode of the diode D1, respectively, the other end of the inductor L2 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is electrically connected to the cathode of the diode D1 and the LED load module, respectively.

[0046] Please refer to Figure 1 and Figure 2 As shown, the first embodiment of the present utility model is:

[0047] Please refer to Figure 1 A segmented dimming lighting circuit includes an LED driver module 1 and an LED load module 2. The LED driver module 1 includes a dimming driver chip IC1 and a dimming control unit 101. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module 2. The dimming control unit 101 is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module 2 into a segmented dimming mode.

[0048] Please refer to Figure 2The dimming control unit 101 includes a switch S1 (which can be a dip switch or a knob switch), a switch S2 (which can be a dip switch or a knob switch), a switch S3 (which can be a dip switch or a knob switch), a switch S4 (which can be a dip switch or a knob switch), a resistor RS1 (resistance value is 1kΩ), a resistor RS2 (resistance value is 13Ω), a resistor RS3 (resistance value is 10Ω) and a resistor RS4 (resistance value is 7.5Ω). The chip select terminal of the dimming driver chip IC1 is connected to one end of the resistor RS1 and one end of the resistor RS2 respectively. The first end of the resistor RS1 is electrically connected to the first end of the switch S1, the second end of the switch S1 is electrically connected to the first end of the switch S2, the second end of the switch S3 and the first end of the switch S4, and the other end of the switch S1, the second end of the switch S2, the second end of the switch S3 and the first end of the switch S4 are all grounded. The other end of the switch S2 is electrically connected to the other end of the resistor RS2, the other end of the switch S3 is electrically connected to the other end of the resistor RS3, and the other end of the switch S4 is electrically connected to the other end of the resistor RS4.

[0049] Please refer to Figure 2 The LED driver module 1 further includes a resistor R7 (resistance value is 47 kΩ), one end of the resistor R7 is electrically connected to the on-time control end of the dimming driver chip IC1, the other end of the resistor R7 is electrically connected to the dimming control unit 101 and the other end of the resistor R7 is grounded.

[0050] Please refer to Figure 2 The LED driver module 1 further includes a resistor R8 (with a resistance of 100 kΩ), one end of which is electrically connected to the over-temperature protection terminal of the dimming driver chip IC1, and the other end of which is electrically connected to the dimming control unit 101 and grounded.

[0051] Please refer to Figure 2 The LED driver module 1 further includes a resistor R4 (with a resistance value of 270 kΩ), a resistor R9 (with a resistance value of 300 kΩ), and a resistor R10 (with a resistance value of 1 kΩ). One end of the resistor R4 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module 2, respectively. The other end of the resistor R4 is electrically connected to one end of the resistor R9. The other end of the resistor R9 is electrically connected to the overvoltage protection end of the dimming driver chip IC1 and one end of the resistor R10, respectively. The other end of the resistor R10 is electrically connected to the dimming control unit 101, and the other end of the resistor R10 is grounded.

[0052] Please refer to Figure 2The LED driver module 1 further includes a resistor R3 (resistance value is 10 kΩ), one end of the resistor R3 is electrically connected to the high voltage end of the dimming driver chip IC1, and the other end of the resistor R3 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module 2 respectively.

[0053] Please refer to Figure 2 The LED driver module 1 also includes an electrolytic capacitor E1 (capacitance value is 33μF), one end of the electrolytic capacitor E1 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module 2 respectively, and the other end of the electrolytic capacitor E1 is electrically connected to the dimming control unit 101 and the other end of the electrolytic capacitor E1 is grounded.

[0054] Please refer to Figure 2 The LED driver module 1 also includes an inductor L2 (inductance value is 2.7mH), a diode D1 (model ES1J) and a capacitor C5 (capacitance value is 33μF). One end of the inductor L2 is electrically connected to the current output end of the dimming driver chip IC1 and the anode of the diode D1, respectively. The other end of the inductor L2 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is electrically connected to the cathode of the diode D1 and the LED load module 2, respectively.

[0055] The LED load module 2, i.e., the LED light source, can be a single-channel light source or a multi-channel light source. In this embodiment, the LED load module 2 includes a light-emitting diode V1 (using a conventional 2835 light source), a light-emitting diode V2 (using a conventional 2835 light source), a light-emitting diode V3 (using a conventional 2835 light source), a light-emitting diode V4 (using a conventional 2835 light source), a light-emitting diode V5 (using a conventional 2835 light source), a light-emitting diode V6 (using a conventional 2835 light source), a light-emitting diode V7 (using a conventional 2835 light source), and a light-emitting diode V8 (using a conventional 2835 light source). For the specific connection relationship between the components, please refer to Figure 2 ;

[0056] The rectifier and filter module 4 is further comprised of a fuse resistor FR1 (resistance value is 4.7Ω), a fuse resistor FR2 (resistance value is 4.7Ω), a safety capacitor C1 (capacitance value is 100nF), a bridge rectifier BR1 (model MB10F), a resistor R1 (resistance value is 5.1kΩ), a capacitor C2 (capacitance value is 150nF), an inductor L1 (inductance value is 2mH), a capacitor C3 (capacitance value is 150nF), a resistor R2 (resistance value is 470Ω) and a capacitor C4 (capacitance value is 150nF). For the specific connection relationship between the components, please refer to Figure 2; Fuse resistors FR1 and FR2 act as overcurrent protection; safety capacitor C1 acts to suppress interference and protect circuit safety; bridge rectifier BR1 acts as a rectifier, converting AC power into DC power; resistor R1, capacitor C2, inductor L1, and capacitor C3 form a π-type filter to filter out noise and interference signals; resistor R2 and capacitor C4 together provide Bleed current for the dimmer.

[0057] Stepless dimming refers to the continuous and smooth current output by the IC, which is manifested externally as a continuous and smooth change in power, and then a continuous and smooth change in light. Generally, the LED load current is calculated by the formula I LED =V REF / R CS To set; the principle of conventional stepless dimming is: when the DIM pin of IC receives the control signal, IC adjusts the reference level of the internal CS pin (i.e. V REF ), thereby changing the LED load current; when using an IC that is not specifically designed for stepless dimming, there is no DIM pin to adjust V RE F, can only be passed through R CS To change the LED load current;

[0058] Therefore, this solution electrically connects the dimming control unit 101 to the chip select terminal of the dimming driver chip IC1, and changes the resistance R of the chip select terminal (i.e., the CS pin) of the dimming driver chip IC1. CS To change the current of LED load module 2, resistors RS1, RS2, RS3 and RS4 are the corresponding resistors R CS Different resistance values, different resistors R CS The resistance value can get different currents to achieve the purpose of segmented dimming; specifically: when the switch S1 is closed, the resistor RS1 acts as the resistor R CS Determine the current of LED load module 2, and so on, close the corresponding switch, and the corresponding resistor is used as the resistor R CS To determine the current of the LED load module 2, two or more switches can be closed at the same time, and the corresponding two or more resistors can be used together as the resistor R CS To determine the current of the LED load module 2, the number of switches and resistors required is determined by the number of dimming stages to be achieved.

[0059] Resistors R3, R4, R7, R8, R9, R10, electrolytic capacitor E1, inductor L2, capacitor C5, and diode D1 are peripheral components of the dimming driver chip IC1. The dimming driver chip IC1 is a common lighting driver IC and can be any of a Buck chip, a Buck-Boost chip, or a Boost chip. This solution uses the BP3276 chip, which is a Boost type IC. Resistor R3 is a current limiting resistor used to power the dimming driver chip IC1. Resistor R4, R9, and R10 together set the OVP voltage (i.e., overvoltage protection voltage) of the dimming driver chip IC1. Resistor R7 is used to set the maximum on-time of the dimming driver chip IC1. Resistor R8 is used to set the overtemperature protection point of the dimming driver chip IC1. Electrolytic capacitor E1 is used for output current filtering. Inductor L2 is the energy storage inductor of the Boost chip. Diode D1 is the freewheeling diode of the Boost chip. Capacitor C5 is a power-on protection capacitor.

[0060] Please refer to Figure 2 and Figure 3 As shown, the second embodiment of the present utility model is:

[0061] Please refer to Figure 3 The difference between the second embodiment and the first embodiment is that the dimming control unit 101 includes a resistor RS11 (resistance value is 1 kΩ), a resistor R19 (resistance value is 13 Ω), a MOS transistor Q1 (model DMG2302), a resistor R12 (resistance value is 0), a resistor R16 (resistance value is 20 kΩ), a resistor R20 (resistance value is 10 Ω), a MOS transistor Q2 (model DMG2302), a resistor R17 (resistance value is 20 kΩ), a resistor R13 (resistance value is 0 Ω), a resistor R21 (resistance value is 7.5 Ω), a MOS transistor Q3 (model DMG2302), a resistor R18 (resistance value is 20 kΩ), and a resistor R15 (resistance value is 0 Ω).

[0062] The chip select terminals of the dimming driver chip IC1 are electrically connected to one end of the resistor RS11, one end of the resistor R19, one end of the resistor R20, and one end of the resistor R21. The other end of the resistor RS11 is grounded. The other end of the resistor R19 is electrically connected to the drain of the MOS transistor Q1. The gate of the MOS transistor Q1 is electrically connected to one end of the resistor R12 and one end of the resistor R16. The other end of the resistor R20 is electrically connected to the drain of the MOS transistor Q2. The gate of the MOS transistor Q2 is electrically connected to one end of the resistor R17 and one end of the resistor R13. The other end of the resistor R21 is electrically connected to the drain of the MOS transistor Q3. The gate of the MOS transistor Q3 is electrically connected to one end of the resistor R18 and one end of the resistor R15 respectively. The other end of the resistor R16 is electrically connected to the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 respectively. The other end of the resistor R16, the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 are all grounded.

[0063] The wireless communication module 3 is also included, and the wireless communication module 3 is electrically connected to the other end of the resistor R12, the other end of the resistor R13, and the other end of the resistor R15 respectively; the wireless communication module 3 includes a chip MK. For the specific connection relationship between the chip MK and other components, please refer to Figure 3 ;

[0064] It also includes a module power supply module 5, and a rectifier and filter module 4 that rectifies and filters the AC power into DC power to power the LED driver module 1 and the module power supply module 5; the module power supply module 5 adopts a Buck architecture to convert the DC high voltage into a DC low voltage to power the wireless communication module 3. The module power supply module 5 includes a capacitor C2 (capacitance value is 1μF), a chip IC2 (model BP2525), a diode D3 (model ES1J), an electrolytic capacitor E2 (capacitance value is 3.3μF), a resistor RS22 (resistance value is 0.33Ω), an inductor L3 (inductance value is 0.33mH), a diode D5 (model ES1J), a diode D4 (model A7), a resistor Re1 (resistance value is 1kΩ) and an electrolytic capacitor E3 (capacitance value is 470μF). For the specific connection relationship between the components, please refer to Figure 3; Capacitor C2 filters the VCC of chip IC2; chip IC2 is a step-down IC, which reduces high voltage to low voltage to power the wireless communication module; diode D3 serves to isolate the wireless communication module power supply module and LED driver module; electrolytic capacitor E2 plays a filtering role; resistor RS22 is a sampling resistor, used to adjust the current of chip IC2; inductor L3 is an energy storage inductor; diode D5 is a freewheeling diode; diode D4 supplies power to chip IC2; resistor Re1 is a dummy load, which discharges the electrolytic capacitor E3; electrolytic capacitor E3 is a filter capacitor.

[0065] The principle of segmented dimming with low standby power consumption is: set the resistance of a certain circuit relatively large, so that the output current of the dimming driver chip IC1 is infinitely close to zero. At this time, the dimming driver chip IC1 works at an extremely low current, and the power consumption can be reduced to less than 0.5W. When this circuit switch is turned on, the other circuits are closed, which is equivalent to entering standby mode; Figure 3 , directly connect resistor RS11 between the chip select terminal (i.e., CS pin) of the dimming driver chip IC1 and the ground terminal (this can save a switch). When the resistance value of resistor RS11 is set to a large enough value, the dimming driver chip IC1 outputs zero current; that is, when the other switches are closed, the dimming driver chip IC1 outputs zero current, which is equivalent to entering standby mode; when the LED load module 2 wants to output the desired power, just turn on the corresponding switch or switch group; the switches in the figure can be controlled by the wireless communication module 3 to achieve intelligent control.

[0066] Resistor RS11, resistor R21, resistor R20, resistor R19, MOS tube Q1, MOS tube Q2, MOS tube Q3, resistor R12, resistor R16, resistor R17, resistor R13, resistor R18 and resistor R15 and Figure 2 The resistors RS1, RS2, RS3, RS4, switches S1, S2, S3, and S4 have the same functions, except that the corresponding switches are replaced by MOS transistors. Specifically, the resistors R12, R16, and MOS transistor Q1 constitute the switch S2, and the resistor R19 is equivalent to the resistor RS2; the resistors R13, R17, and MOS transistor Q2 constitute the switch S3, and the resistor R20 is equivalent to the resistor RS3; the resistors R15, R18, and MOS transistor Q3 constitute the switch S4, and the resistor R21 is equivalent to the resistor RS4; Figure 3 The resistor RS11 in Figure 2The RS1 in the figure is the same as RS1 in the figure, but the switch S1 is omitted. This setting not only saves a switch, but also achieves low standby power consumption. When MOS tubes Q1, MOS tubes Q2 and MOS tubes Q3 are all disconnected (equivalent to switches S2, S3 and S4 being disconnected and switch S1 being closed) and resistor RS11 is set to a relatively large resistance value, it can be concluded from the formula that the current of LED load module 2 is infinitely close to zero, which is equivalent to the whole machine entering standby mode. When one or more of MOS tubes Q1, MOS tubes Q2 and MOS tubes Q3 are closed, the corresponding one or more resistors together serve as resistor R CS To determine the current of the LED load module 2, the number of switches and resistors required is determined by the number of dimming stages to be achieved.

[0067] In summary, the utility model provides a segmented dimming lighting circuit, which is provided by setting an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into the segmented dimming mode, thereby achieving the purpose of segmented dimming.

[0068] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A segmented dimming lighting circuit, characterized in that: It includes an LED driver module and an LED load module. The LED driver module includes a dimming driver chip IC1 and a dimming control unit. The current output end of the dimming driver chip IC1 is electrically connected to the LED load module. The dimming control unit is electrically connected to the chip select end of the dimming driver chip IC1 so that the current output end of the dimming driver chip IC1 outputs different LED currents to drive the LED load module into the segmented dimming mode.

2. The segmented dimming lighting circuit according to claim 1, characterized in that: The dimming control unit includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor RS1, a resistor RS2, a resistor RS3 and a resistor RS4. The chip select end of the dimming driver chip IC1 is electrically connected to one end of the resistor RS1, one end of the resistor RS2, one end of the resistor RS3 and one end of the resistor RS4, respectively. The other end of the resistor RS1 is electrically connected to one end of the switch S1, and the other end of the switch S1 is electrically connected to one end of the switch S2, one end of the switch S3 and one end of the switch S4, and the other end of the switch S1, one end of the switch S2, one end of the switch S3 and one end of the switch S4 are all grounded. The other end of the switch S2 is electrically connected to the other end of the resistor RS2, the other end of the switch S3 is electrically connected to the other end of the resistor RS3, and the other end of the switch S4 is electrically connected to the other end of the resistor RS4.

3. The segmented dimming lighting circuit according to claim 1, characterized in that: The dimming control unit includes a resistor RS11, a resistor R19, a MOS transistor Q1, a resistor R12, a resistor R16, a resistor R20, a MOS transistor Q2, a resistor R17, a resistor R13, a resistor R21, a MOS transistor Q3, a resistor R18 and a resistor R15; The chip select terminals of the dimming driver chip IC1 are electrically connected to one end of the resistor RS11, one end of the resistor R19, one end of the resistor R20, and one end of the resistor R21. The other end of the resistor RS11 is grounded. The other end of the resistor R19 is electrically connected to the drain of the MOS transistor Q1. The gate of the MOS transistor Q1 is electrically connected to one end of the resistor R12 and one end of the resistor R16. The other end of the resistor R20 is electrically connected to the drain of the MOS transistor Q2. The gate of the MOS transistor Q2 is electrically connected to one end of the resistor R17 and one end of the resistor R13. The other end of the resistor R21 is electrically connected to the drain of the MOS transistor Q3. The gate of the MOS transistor Q3 is electrically connected to one end of the resistor R18 and one end of the resistor R15 respectively. The other end of the resistor R16 is electrically connected to the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 respectively. The other end of the resistor R16, the source of the MOS transistor Q1, the source of the MOS transistor Q2, the other end of the resistor R17, the source of the MOS transistor Q3, and the other end of the resistor R18 are all grounded.

4. The segmented dimming lighting circuit according to claim 3, characterized in that: It also includes a wireless communication module, which is electrically connected to the other end of the resistor R12, the other end of the resistor R13, and the other end of the resistor R15 respectively.

5. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driving module further includes a resistor R7 , one end of which is electrically connected to the on-time control end of the dimming driving chip IC1 , the other end of which is electrically connected to the dimming control unit and the other end of which is grounded.

6. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driving module further includes a resistor R8 , one end of which is electrically connected to the over-temperature protection terminal of the dimming driving chip IC1 , the other end of which is electrically connected to the dimming control unit and the other end of which is grounded.

7. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driver module also includes a resistor R4, a resistor R9 and a resistor R10. One end of the resistor R4 is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module, respectively. The other end of the resistor R4 is electrically connected to one end of the resistor R9. The other end of the resistor R9 is electrically connected to the overvoltage protection end of the dimming driver chip IC1 and one end of the resistor R10, respectively. The other end of the resistor R10 is electrically connected to the dimming control unit and the other end of the resistor R10 is grounded.

8. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driver module further includes a resistor R3 , one end of which is electrically connected to the high voltage end of the dimming driver chip IC1 , and the other end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module.

9. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driver module further includes an electrolytic capacitor E1, one end of which is electrically connected to the current output end of the dimming driver chip IC1 and the LED load module respectively, and the other end of the electrolytic capacitor E1 is electrically connected to the dimming control unit and the other end of the electrolytic capacitor E1 is grounded.

10. The segmented dimming lighting circuit according to claim 1, characterized in that: The LED driver module also includes an inductor L2, a diode D1 and a capacitor C5. One end of the inductor L2 is electrically connected to the current output end of the dimming driver chip IC1 and the anode of the diode D1, respectively. The other end of the inductor L2 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is electrically connected to the cathode of the diode D1 and the LED load module, respectively.

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