Constant current power supply compatible with multiple dimming modes and multi-path output

Abstract

The utility model discloses a constant current power supply compatible with various dimming modes and multi-path output. The constant current power supply comprises an isolation conversion module, a main control module, a dimming mode selection module, an output mode selection module, a plurality of dimming signal processing modules and a plurality of DC-DC constant current output modules. The isolation conversion module is connected between an external power supply and the input end of the DC-DC constant current output module; the main control module is connected among the input ends of the dimming mode selection module, the output mode selection module, the dimming signal processing module and the DC-DC constant current output module; the dimming mode selection module is used for selecting an input dimming signal; the output mode selection module is used for selecting the output number of the DC-DC constant current output module; the lamp can be connected to the output ends of one or more DC-DC constant current output modules so as to adjust the brightness, color temperature and / or color of the lamp; through the above structure, the problem that a constant current power supply can only share a common cathode or a common anode is solved, and the constant current power supply has multiple dimming modes, multiple selectable output channels and selectable output parameter characteristics.

Description

Technical Field

[0001] The utility model relates to the technical field of LED dimming driving power supply and switching power supply, in particular to a constant current power supply compatible with multiple dimming modes and multi-channel outputs. Background Art

[0002] In the LED lighting industry, constant current dimming power supply does not need matching resistors to limit current, and the lamp beads are well received by the market for their high luminous efficiency. The constant current power supply with multiple outputs can realize the dimming and color adjustment functions and can be used in more usage scenarios. Based on this, in order to be compatible with more usage scenarios, when multiple constant current dimming can share both cathode and anode, multiple output channels and multiple output current modes can be combined. Users can choose different output characteristics according to their own situation - large current and small voltage and small current and high voltage, and can achieve single-color dimming, cold and warm dimming and color adjustment, RGB dimming and color adjustment in terms of effect; in addition, with a variety of dimming methods, it is convenient for production and users to prepare stocks; therefore, a constant current power supply that is compatible with multiple dimming methods and multiple outputs is very necessary. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a constant current power supply compatible with multiple dimming modes and multi-channel outputs.

[0004] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: a constant current power supply compatible with multiple dimming modes and multiple outputs, including an isolation conversion module, a main control module, a dimming mode selection module, an output mode selection module, multiple dimming signal processing modules and multiple DC-DC constant current output modules;

[0005] The isolation conversion module is connected between the external power supply and the input end of the DC-DC constant current output module;

[0006] The main control module is connected between the dimming mode selection module, the output mode selection module, the dimming signal processing module and the input end of the DC-DC constant current output module;

[0007] The dimming mode selection module is used to select the input dimming signal;

[0008] The output mode selection module is used to select the output quantity of the DC-DC constant current output module;

[0009] The lamp can be connected to the output end of a single or multiple DC-DC constant current output modules to adjust the brightness, color temperature and / or color of the lamp.

[0010] As one of the preferred embodiments of the present utility model, the DC-DC constant current output module is configured as four channels.

[0011] As one of the preferred embodiments of the utility model, the positive pole of the first lamp is connected to the output positive pole of the four-way DC-DC constant current output module, and the negative pole of the first lamp is connected to the output negative pole of the four-way DC-DC constant current output module.

[0012] As one of the preferred embodiments of the utility model, the positive pole of the first lamp and the positive pole of the second lamp are connected to the output positive pole of the four-way DC-DC constant current output module, the negative pole of the first lamp is connected to the output negative pole of the first DC-DC constant current output module and the output negative pole of the second DC-DC constant current output module, and the negative pole of the second lamp is connected to the output negative pole of the third DC-DC constant current output module and the output negative pole of the fourth DC-DC constant current output module.

[0013] As one of the preferred embodiments of the utility model, the positive pole of the first lamp, the positive pole of the second lamp and the positive pole of the third lamp are connected to the output positive pole of the four-way DC-DC constant current output module, the negative pole of the first lamp is connected to the output negative pole of the first DC-DC constant current output module, the negative pole of the second lamp is connected to the output negative pole of the second DC-DC constant current output module, and the negative pole of the third lamp is connected to the output negative pole of the third DC-DC constant current output module.

[0014] As one of the preferred embodiments of the utility model, the positive pole of the first lamp, the positive pole of the second lamp, the positive pole of the third lamp and the positive pole of the fourth lamp are connected to the output positive pole of the four-way DC-DC constant current output module, the negative pole of the first lamp is connected to the output negative pole of the first DC-DC constant current output module, the negative pole of the second lamp is connected to the output negative pole of the second DC-DC constant current output module, the negative pole of the third lamp is connected to the output negative pole of the third DC-DC constant current output module, and the negative pole of the fourth lamp is connected to the output negative pole of the fourth DC-DC constant current output module.

[0015] As one of the preferred embodiments of the utility model, the dimming mode selection module includes a self-locking switch S3 and a resistor R55, one end of the resistor R55 is connected to VCC, the other end of the resistor R55 is connected to the main control module and one end of the self-locking switch S3, and the other end of the self-locking switch S3 is connected to GND.

[0016] As one of the preferred embodiments of the utility model, the output mode selection module includes a self-locking switch S1-2, a resistor R54 and resistors R57-58, one end of the resistor R54 is connected to VCC, the other end of the resistor R54 is connected to the main control module, one end of the self-locking switch S1 and one end of the self-locking switch S2, the other end of the self-locking switch S1 is connected to GND via resistor R57, and the other end of the self-locking switch S2 is connected to GND via resistor R58.

[0017] As one of the preferred embodiments of the present utility model, at least one dimming signal processing module is configured as a DMX module.

[0018] As one of the preferred embodiments of the present invention, at least one dimming signal processing module is configured as a DAL I module.

[0019] The beneficial effects of the utility model include: a constant current power supply compatible with multiple dimming modes and multiple outputs, comprising an isolation conversion module, a main control module, a dimming mode selection module, an output mode selection module, multiple dimming signal processing modules and multiple DC-DC constant current output modules; the isolation conversion module is connected between an external power supply and the input end of the DC-DC constant current output module; the main control module is connected between the dimming mode selection module, the output mode selection module, the dimming signal processing module and the input end of the DC-DC constant current output module; the dimming mode selection module is used to select the input dimming signal; the output mode selection module is used to select the output quantity of the DC-DC constant current output module; lamps can be connected to the output ends of a single or multiple DC-DC constant current output modules to adjust the brightness, color temperature and / or color of the lamps; the above structure overcomes the problem that the constant current power supply can only share cathode or only share anode, and at the same time has multiple dimming modes, multiple output channels to choose from, and output parameter characteristics to choose from. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 The first embodiment is a principle block diagram of a constant current power supply compatible with multiple dimming modes and multiple outputs;

[0022] Figure 2 The schematic diagram of the second embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs;

[0023] Figure 3 The schematic diagram of the third embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs;

[0024] Figure 4 The fourth embodiment is a functional block diagram of a constant current power supply compatible with multiple dimming modes and multiple outputs;

[0025] Figure 5 The circuit schematic diagram of a constant current power supply compatible with multiple dimming modes and multi-channel outputs;

[0026] Figure 6 It is a circuit schematic diagram of the first embodiment of the dimming signal processing module;

[0027] Figure 7is a circuit schematic diagram of a second embodiment of a dimming signal processing module;

[0028] Figure 8 This is the circuit schematic diagram of the DC-DC constant current output module;

[0029] Fig. 9 The circuit schematic diagram of the module for dimming mode selection;

[0030] Fig.10 Schematic diagram of the module for output mode selection. DETAILED DESCRIPTION

[0031] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model 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 the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0032] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, 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, and 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, and therefore cannot be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0035] Reference Figures 1 to 10, a constant current power supply compatible with multiple dimming modes and multiple outputs, including an isolation conversion module 10, a main control module 20, a dimming mode selection module 30, an output mode selection module 40, multiple dimming signal processing modules 50 and multiple DC-DC constant current output modules 60;

[0036] The isolation conversion module 10 is connected between the external power supply and the input end of the DC-DC constant current output module 60;

[0037] The main control module 20 is connected between the input ends of the dimming mode selection module 30, the output mode selection module 40, the dimming signal processing module 50 and the DC-DC constant current output module 60;

[0038] The dimming mode selection module 30 is used to select an input dimming signal;

[0039] The output mode selection module 40 is used to select the output quantity of the DC-DC constant current output module 60;

[0040] The lamp can be connected to the output end of a single or multiple DC-DC constant current output modules 60 to adjust the brightness, color temperature and / or color of the lamp.

[0041] In this utility model, the working principle is as follows:

[0042] ① The mains power LN passes through the EM I filter module 80 and the bridge rectifier module 90 to output a pulsating direct current with a steamed bun wave. The isolation conversion module 10 converts the pulsating direct current with a steamed bun wave into a flat direct current. It also has functions such as power factor correction and voltage stabilization, and outputs a group of VCC_5V power supplies, a group of VCC_3.3V power supplies, a group of VCC_16V power supplies, and a group of VDC to supply direct current to the DC-DC constant current conversion module 60 at the subsequent stage; the dimming signal processing module 50 is provided with at least two groups for receiving the signal input by the dimmer, isolating and stepping down the signal into a signal acceptable to the single-chip microcomputer, and the wiring terminals are shared and the IO of the signal input is multiplexed; the main control module 20 is used to receive the dimming signal , dimming mode selection signal, output mode selection signal, output dimming control signal to the DC-DC constant current conversion module 60 through a half-duplex bus, and query the output status of each channel, enable control signal, etc.; the dimming mode selection module 30 is used by the main control module 20 to determine which dimming mode is currently in use; the output mode selection module 40 is used by the main control module 20 to determine how many outputs the user needs. For example, when the user selects 3 in the output mode selection module 40, the dimming and color adjustment functions of R, G, B, and W can be achieved; multiple DC-DC constant current conversion modules 60 share a set of bus communications, but the dimming address of each channel is different, and the enable signal is controlled through different IO ports.

[0043] ②Reference Figure 1As a first embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs, the DC-DC constant current output module 60 is set to four channels; the positive electrode of the first lamp is connected to the output positive electrode of the four-channel DC-DC constant current output module 60, and the negative electrode of the first lamp is connected to the output negative electrode of the four-channel DC-DC constant current output module 60;

[0044] Specifically, when the user selects 0 in the output mode selection module 40, the total output current is equal to four times the single-channel output current, and the negative output ends of the four channels are connected together, which can realize the use scenario of high current and low voltage.

[0045] ③Reference Figure 2 As a second embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs, the DC-DC constant current output module 60 is set to four channels; the positive electrode of the first lamp 71 and the positive electrode of the second lamp 72 are connected to the output positive electrode of the four-channel DC-DC constant current output module 60, the negative electrode of the first lamp 71 is connected to the output negative electrode of the first DC-DC constant current output module 60 and the output negative electrode of the second DC-DC constant current output module 60, and the negative electrode of the second lamp 72 is connected to the output negative electrode of the third DC-DC constant current output module 60 and the output negative electrode of the fourth DC-DC constant current output module 60;

[0046] Specifically, when the customer selects 2 in the output mode selection module 40, the total output current is equal to twice the single-channel output current, the negative output ends of the first and second channels are connected together, and the negative output ends of the third and fourth channels are connected together, which can realize the functions of adjusting color temperature and dimming.

[0047] ④Reference Figure 3 As a third embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs, the DC-DC constant current output module 60 is set to four channels; the positive electrode of the first lamp 71, the positive electrode of the second lamp 72 and the positive electrode of the third lamp 73 are connected to the output positive electrode of the four-channel DC-DC constant current output module 60, the negative electrode of the first lamp 71 is connected to the output negative electrode of the first DC-DC constant current output module 60, the negative electrode of the second lamp 72 is connected to the output negative electrode of the second DC-DC constant current output module 60, and the negative electrode of the third lamp 73 is connected to the output negative electrode of the third DC-DC constant current output module 60;

[0048] Specifically, when the customer selects 1 in the output mode selection module 40, the total current is equal to the maximum current that can be output by a single channel, and the R, G, B color temperature and dimming functions can be realized.

[0049] ⑤Reference Figure 4As a fourth embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs, the DC-DC constant current output module 60 is set to four channels; the positive pole of the first lamp 71, the positive pole of the second lamp 72, the positive pole of the third lamp 73 and the positive pole of the fourth lamp 74 are connected to the output positive pole of the four-channel DC-DC constant current output module 60, the negative pole of the first lamp 71 is connected to the output negative pole of the first DC-DC constant current output module 60, the negative pole of the second lamp 72 is connected to the output negative pole of the second DC-DC constant current output module 60, the negative pole of the third lamp 73 is connected to the output negative pole of the third DC-DC constant current output module 60, and the negative pole of the fourth lamp 74 is connected to the output negative pole of the fourth DC-DC constant current output module 60;

[0050] Specifically, when the customer selects 3 in the output mode selection module 40, the total current is equal to the maximum current that can be output by a single channel, and the R, G, B, W color temperatures and dimming functions can be realized.

[0051] ⑥Reference Figure 5-10 As a fifth embodiment of a constant current power supply compatible with multiple dimming modes and multiple outputs, the dimming mode selection module 30 includes a self-locking switch S3 and a resistor R55, one end of the resistor R55 is connected to VCC, the other end of the resistor R55 is connected to the main control module 20 and one end of the self-locking switch S3, and the other end of the self-locking switch S3 is connected to GND; the output mode selection module 40 includes a self-locking switch S1-2, a resistor R54 and a resistor R57-58, one end of the resistor R54 is connected to VCC, the other end of the resistor R54 is connected to the main control module 20, one end of the self-locking switch S1 and one end of the self-locking switch S2, the other end of the self-locking switch S1 is connected to GND via the resistor R57, and the other end of the self-locking switch S2 is connected to GND via the resistor R58;

[0052] Specifically, at least one dimming signal processing module 50 is set as a DMX module, and at least one dimming signal processing module 50 is set as a DAL I module. The DMX module and the DAL I module share a dimming line interface and an IO port. When the self-locking switch S1 in the dimming mode selection module 30 is pressed, IO is 0, and it is judged that the DMX dimming function is selected. When the self-locking switch S1 is not pressed, IO is 3.3V, and it is judged that the DAL I dimming function is selected.

[0053] When neither the self-locking switch S1 nor the self-locking switch S2 is pressed, the channel selection signal is judged to be 0; when the self-locking switch S1 is pressed and the self-locking switch S2 is not pressed, the channel selection signal is judged to be 1; when the self-locking switch S1 is not pressed and the self-locking switch S2 is pressed, the channel selection signal is judged to be 2; when both the self-locking switch S1 and the self-locking switch S2 are pressed, the channel selection signal is judged to be 2.

[0054] ⑦ The advantage of the utility model is that: the above structure overcomes the problem that the constant current power supply can only share the cathode or only share the anode, and at the same time has a variety of dimming modes, a variety of output channels to choose from, and output parameter characteristics to choose from.

[0055] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field 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 constant current power supply compatible with multiple dimming modes and multiple outputs, characterized by: It comprises an isolation conversion module (10), a main control module (20), a dimming mode selection module (30), an output mode selection module (40), a plurality of dimming signal processing modules (50) and a plurality of DC-DC constant current output modules (60); The isolation conversion module (10) is connected between an external power source and an input end of the DC-DC constant current output module (60); The main control module (20) is connected between the input ends of the dimming mode selection module (30), the output mode selection module (40), the dimming signal processing module (50) and the DC-DC constant current output module (60); The dimming mode selection module (30) is used to select an input dimming signal; The output mode selection module (40) is used to select the output quantity of the DC-DC constant current output module (60); The lamp can be connected to the output end of one or more of the DC-DC constant current output modules (60) to adjust the brightness, color temperature and / or color of the lamp.

2. According to claim 1, a constant current power supply compatible with multiple dimming modes and multiple outputs, characterized in that: The DC-DC constant current output module (60) is configured to have four channels.

3. According to claim 2, a constant current power supply compatible with multiple dimming modes and multiple outputs, characterized in that: The positive pole of the first lamp is connected to the positive output poles of the four DC-DC constant current output modules (60), and the negative pole of the first lamp is connected to the negative output poles of the four DC-DC constant current output modules (60).

4. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 2, characterized in that: The positive pole of the first lamp (71) and the positive pole of the second lamp (72) are connected to the positive poles of the outputs of the four DC-DC constant current output modules (60); the negative pole of the first lamp (71) is connected to the negative pole of the output of the first DC-DC constant current output module (60) and the negative pole of the output of the second DC-DC constant current output module (60); and the negative pole of the second lamp (72) is connected to the negative pole of the output of the third DC-DC constant current output module (60) and the negative pole of the output of the fourth DC-DC constant current output module (60).

5. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 2, characterized in that: The positive pole of the first lamp (71), the positive pole of the second lamp (72) and the positive pole of the third lamp (73) are connected to the positive poles of the outputs of the four DC-DC constant current output modules (60); the negative pole of the first lamp (71) is connected to the negative pole of the output of the first DC-DC constant current output module (60); the negative pole of the second lamp (72) is connected to the negative pole of the output of the second DC-DC constant current output module (60); and the negative pole of the third lamp (73) is connected to the negative pole of the output of the third DC-DC constant current output module (60).

6. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 2, characterized in that: The positive pole of the first lamp (71), the positive pole of the second lamp (72), the positive pole of the third lamp (73) and the positive pole of the fourth lamp (74) are connected to the positive poles of the outputs of the four DC-DC constant current output modules (60); the negative pole of the first lamp (71) is connected to the negative pole of the output of the first DC-DC constant current output module (60); the negative pole of the second lamp (72) is connected to the negative pole of the output of the second DC-DC constant current output module (60); the negative pole of the third lamp (73) is connected to the negative pole of the output of the third DC-DC constant current output module (60); and the negative pole of the fourth lamp (74) is connected to the negative pole of the output of the fourth DC-DC constant current output module (60).

7. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 1, characterized in that: The dimming mode selection module (30) comprises a self-locking switch S3 and a resistor R55, one end of the resistor R55 is connected to VCC, the other end of the resistor R55 is connected to the main control module (20) and one end of the self-locking switch S3, and the other end of the self-locking switch S3 is connected to GND.

8. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 1, characterized in that: The output mode selection module (40) comprises a self-locking switch S1-2, a resistor R54 and resistors R57-58, one end of the resistor R54 is connected to VCC, the other end of the resistor R54 is connected to the main control module (20), one end of the self-locking switch S1 and one end of the self-locking switch S2, the other end of the self-locking switch S1 is connected to GND via the resistor R57, and the other end of the self-locking switch S2 is connected to GND via the resistor R58.

9. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 1, characterized in that: At least one of the dimming signal processing modules (50) is configured as a DMX module.

10. The constant current power supply compatible with multiple dimming modes and multiple outputs according to claim 1, characterized in that: At least one of the dimming signal processing modules (50) is configured as a DALI module.

Images