An LED driving power supply system capable of configuring various parameters for a lamp

Abstract

This invention relates to an LED driver power supply system capable of configuring various parameters of a lighting fixture. The system includes a driver power supply module that provides operating voltage to the LED lighting fixture load. The driver power supply module includes a control module. It also includes a load resistor RL disposed at the output terminal of the driver power supply module and connected in parallel across the LED lighting fixture load. The load resistor RL is electrically connected to the control module. The control module contains an information table that maps different load resistor values ​​to different lighting fixture parameter electrical information. The control module instantaneously acquires the resistance value of the load resistor RL before the LED lighting fixture load starts and compares it with the information table to obtain the corresponding lighting fixture parameter electrical information. Based on this, the control module configures the electrical information currently output by the driver power supply module. This system improves the efficiency and ease of operation in configuring the internal parameters of the lighting fixture.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to an LED driver power supply system that can configure various parameters of a lighting fixture. Background Technology

[0002] Users of LED lighting fixtures often have diverse needs, such as the ability to adjust brightness, output voltage, output current, color temperature, color, and operating mode. To meet these requirements, manufacturers design relatively universal power supplies that allow for flexible adjustment of various internal parameters, thereby achieving this goal while simultaneously reducing product lines and saving costs.

[0003] Currently, common adjustment methods include DIP switches, rotary knobs, NFC configuration parameter writing, and wired or wireless system configuration parameter writing. Among these, DIP switches and rotary knobs are simple to operate and low in cost, but the configurable parameters are relatively limited, and all require operation of the lamp body for modification. Once the lamp is packaged and shipped from the factory, multiple parameters cannot be adjusted. NFC configuration parameter writing and wired / wireless system configuration parameter writing are very flexible, but changing the configuration usually requires specific equipment, which is more expensive. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide a new LED driver power supply system that can configure a variety of parameters of the lamp, and is simple to operate, low in cost, and highly applicable.

[0005] To achieve the above objectives, the technical solution of the present invention is: an LED driver power supply system capable of configuring multiple parameters for a lamp, comprising,

[0006] A driver power supply module that provides operating voltage for LED lighting loads, the driver power supply module including a control module;

[0007] Its features are:

[0008] It also includes a load resistor RL disposed at the output end of the driver power module and connected in parallel across the LED lamp load, wherein the load resistor RL is electrically connected to the control module;

[0009] The control module contains an information table that corresponds one-to-one between different load resistor values ​​and different lamp parameter electrical information. The control module acquires the resistance value of the load resistor RL instantaneously before the LED lamp load starts, and compares it with the information table to obtain the corresponding lamp parameter electrical information. Based on this, the control module configures the electrical information currently output by the drive power module.

[0010] Preferably, the drive power module further includes an adjustment module, a conduction module, and a power module that provides voltage to the adjustment module, the conduction module, and the LED lighting load;

[0011] The adjustment module is set between the output terminal of the control module and the load resistor RL to control the opening and closing of the LED lamp load, and can adjust the output electrical information according to the corresponding lamp parameter electrical information and the output information of the control module.

[0012] The conducting module is connected to the load resistor RL and the input terminal of the control module respectively, and forms the first branch with the power supply module. The conducting module turns on the first branch momentarily before the adjustment module starts, and turns off after the circuit stabilizes, so that the control module can obtain the resistance value by acquiring the electrical signal between the conducting module and the control module and using the electrical signal relationship between the conducting module and the load resistor RL and the conduction characteristics of the conducting module.

[0013] Preferably, the conducting module includes a conducting component connected to the load resistor RL and the input terminal of the control module respectively, and a constant voltage source disposed between the conducting component and the power module;

[0014] The electrical signal is the current flowing through the conducting component obtained by the control module, or the voltage value converted from the current, or the time signal obtained by the control module.

[0015] The electrical signal relationship between the conduction module and the load resistor RL corresponds to the conduction characteristics of the conduction module. The conduction characteristics of the conduction component make a fixed relationship between the current flowing through the load resistor RL and the electrical signal obtained by the control module.

[0016] The voltage value U1 of the constant voltage source is less than (the minimum driving voltage of the LED lamp load + the voltage drop between the two ends of the conducting component that are connected to the load resistor RL and the constant voltage source respectively).

[0017] Preferably, the conducting component is at least one PNP transistor, wherein the base of the PNP transistor is connected to a constant voltage source, the emitter is connected to a load resistor RL, and the collector is connected to the input terminal of the control module.

[0018] The reference component is a pull-down resistor R1, and the current I flowing through the pull-down resistor R1 is... R1 There is I between the conductive component and the conductive component R1 =Ic, the conduction characteristic of the conducting component is Ie=Ib+Ic=(1+β)Ib, where Ib, Ic, and Ie are the base, collector, and emitter currents of the PNP transistor, respectively;

[0019] The electrical signal relationship between the conduction module and the load resistor RL is Ie = I RLThe current flowing through the load resistor RL and the current flowing towards the reference component have a linear relationship, I. RL =(1+1 / β)I R1 .

[0020] Preferably, an anti-backflow component is also connected between the constant voltage source and the base of the PNP transistor.

[0021] Preferably, the anti-backflow component is a diode whose positive terminal is connected to the base of a PNP transistor and whose negative terminal is connected to a constant voltage source.

[0022] Preferably, the voltage drop between the two ends of the conducting component that are connected to the load resistor RL and the constant voltage source is 1.4V.

[0023] Preferably, the adjustment module is a constant current source or a constant current source.

[0024] Preferably, the load resistor is integrated with the LED lamp load.

[0025] Compared with the prior art, the advantages of this invention are as follows: By setting load resistors at both ends of the lamp load and setting an information table in the control module that corresponds one-to-one between the resistance value and the lamp parameter information, the relationship between the constant voltage source and the minimum driving voltage of the lamp and the voltage between the conducting components is obtained by fully combining the conduction characteristics of the conducting components. The relationship between the load resistor voltage and the constant voltage source, the load resistor current and the conducting components is obtained to obtain the load resistor value. This value is then compared with the information table to determine the parameter information that needs to be adjusted. Based on this, the adjustment module is controlled to adjust the output electrical signal, which effectively realizes the configuration of multiple parameters, simplifies the operation, and improves the parameter configuration efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the LED driver power supply system that allows for the configuration of various parameters for the luminaire, as described in this application.

[0027] Figure 2 This is a preferred circuit diagram of an LED driver power supply system that allows for the configuration of various parameters of the luminaire, as described in this application. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1 to 2The diagram shows the overall structure and preferred embodiment of the LED driver power supply system of the present invention, which allows for multiple parameter configurations of the lighting fixture. The LED driver power supply system includes a driver power supply module 2 that provides operating voltage to the LED lighting fixture load 1. The driver power supply module 2 includes a control module 21. As those skilled in the art will know, the circuit that drives the lighting fixture includes not only driving components but also modules or components such as rectification and buck converters. However, these are known to those skilled in the art and are not the focus of this application. Furthermore, those skilled in the art can design and solve these problems using conventional technical means according to actual needs; therefore, these components will not be described in detail here.

[0030] As mentioned earlier, various requirements arise for lighting fixtures during actual use. Some users want the brightness to adjust and change according to weather conditions, others want the color to change depending on the time of day, and still others want the current circuit structure to automatically provide the appropriate voltage after replacing the fixtures, without requiring much manual intervention. In special locations such as tunnels and underground parking lots, users want the fixtures to automatically turn on after a power outage and restoration, or in chemical plant areas, the fixtures to automatically turn off after a power outage and restoration, thus changing their operating status. Current adjustment methods have certain shortcomings. To overcome these issues, this application improves the drive power supply system.

[0031] Specifically, the driving power supply system also includes a load resistor RL located at the output end of the driving power supply module 2 and connected in parallel across the LED lamp load 1. The load resistor RL is electrically connected to the control module 21. The control module 21 contains an information table that corresponds one-to-one between different load resistor values ​​and different lamp parameter electrical information. The control module 21 obtains the resistance value of the load resistor RL at the moment the LED lamp load 1 is started, and compares the resistance value with the information table to obtain the lamp parameter electrical information corresponding to the current resistance value. At the same time, the control module 21 configures the electrical information currently output by the driving power supply module 2 accordingly.

[0032] It is readily apparent to those skilled in the art that the electrical parameters of a lighting fixture can be the fixture model, including parameters such as operating voltage, current, and power; it can be the fixture's color information, including parameters such as duty cycle output and voltage; or it can be the operating mode information, including parameters such as the start time of extinguishing (or lighting), the end time of extinguishing (or lighting), voltage, and current, and so on. In short, these electrical parameters are essentially the various electrical signal parameters (such as voltage, current, and duty cycle) that can be received, understood, and adjusted by the circuit at the microscopic level to meet the needs of ordinary consumers (such as color and operating mode) at the macroscopic level. Obviously, from this perspective, the configuration of these parameters also requires software support. However, since this application focuses on protection from the perspective of hardware circuitry, software program settings are not within the scope of this description. Furthermore, for those skilled in the art, designing software programs based on the hardware circuitry disclosed in this application is quite easy, and therefore will not be elaborated upon here.

[0033] As an improvement, the driver power supply module 2 also includes an adjustment module 22, a conduction module 23, and a power supply module 24 that provides voltage to the adjustment module 22, the conduction module 23, and the LED lighting load 1. The adjustment module 22 is located between the output terminal of the control module 21 and the load resistor RL, and is used to control the on / off state of the LED lighting load 1. It can also adjust the electrical information output by the driver power supply module 2 according to the corresponding lighting parameter electrical information and the output information of the control module 21.

[0034] The conducting module 23 is connected to the load resistor RL and the input terminal of the control module 21 respectively, and forms the first branch with the power supply module 24. The conducting module 23 makes the first branch conduct at the moment the adjustment module 22 starts, and does not conduct after the circuit stabilizes. In this way, the control module 21 obtains the resistance value of the load resistor RL by acquiring the electrical signal between the conducting module 23 and the control module 21, and by using the electrical signal relationship between the conducting module 23 and the load resistor RL and the conduction characteristics of the conducting module 23.

[0035] Specifically, in this embodiment, the conduction module 23 includes a conduction component 231 connected to the load resistor RL and the input terminal of the control module 21 respectively, a reference component 232 with one end connected between the control module 21 and the conduction component 231 and the other end grounded, and a constant voltage source 233 disposed between the conduction component 231 and the power module 4.

[0036] The aforementioned electrical signal can be the current flowing through the conducting component 231 acquired by the control module 21; in this embodiment, it corresponds to the current I flowing through the reference component 232. R1The voltage value converted by the control module 21 based on the current, i.e., the voltage value between the conducting component 231 and the input terminal of the control module 21, i.e., the voltage drop on the reference component 232, or the time signal acquired by the control module 21; the electrical signal relationship between the conducting module 23 and the load resistor RL and the conduction characteristics of the conducting module 23 correspond to the conduction characteristics of the conducting component 231, which makes the current flowing through the load resistor RL and the aforementioned electrical signal acquired by the control module 21 have a fixed relationship. Specifically, in this embodiment, the fixed relationship is that the conduction characteristics of the conducting component 231 make the current flowing through the load resistor RL and the current flowing to the reference component 232 have a linear relationship;

[0037] The voltage value U1 of the constant voltage source 233 must satisfy the condition that U1 < (minimum driving voltage of LED lamp load 1 + voltage drop between the two ends of the conducting component connected to the load resistor RL and the constant voltage source 232 respectively). The voltage of the constant voltage source 233 must be specified in this way because only in this way can the driving power supply system ensure that the first branch is conducting at the moment the adjustment module is started and that the LED lamp load can be turned off when the adjustment module is turned off. Otherwise, if U1 > (minimum driving voltage of LED lamp load 1 + voltage drop between the two ends of the conducting component connected to the load resistor RL and the constant voltage source 232 respectively), the lamp cannot be completely turned off. If this happens, the circuit design is a failure.

[0038] like Figure 2 As shown, the conducting component 231 is at least one PNP transistor Q1. The base of the PNP transistor Q1 is connected to the constant voltage source 233, the emitter is connected to the load resistor RL, and the collector is connected to the input terminal of the control module 21. In this application, the control module 21 is an MCU. The reference component 232 is a pull-down resistor R1, and the adjustment module 22 is a constant current source. Of course, it can also be a constant voltage source, which can be selected according to specific needs.

[0039] To ensure circuit safety, an anti-backflow component 234 is connected between the constant voltage source 233 and the base of the PNP transistor Q1. Specifically, in this embodiment, the positive terminal of the anti-backflow component 234 is connected to the base of the PNP transistor Q1, while the negative terminal is connected to the diode D1 of the constant voltage source 233.

[0040] As mentioned earlier, at the moment the adjustment module starts, it means that the constant current source has not yet started and is in the off state, with no current output. At this time, the LED lamp load 1 is cut off, and the current on the power module VCC flows through the load resistor RL, through the PNP transistor Q1, the anti-backflow device D1, and then to the constant voltage source U1. Because this current passes through the emitter-base of the transistor and the two PN junctions of the diode D1, the voltage at point b is (VCC-U1+1.4V). In other words, the voltage drop between the two ends of the conducting component 231 connected to the load resistor RL and the constant voltage source U1 is 1.4V. Therefore, in this circuit, the requirement for the value of U1 is that U1 must satisfy U1 < (minimum driving voltage of LED lamp load 1 + 1.4V).

[0041] The voltage across the load resistor RL is (VCC-U) b Thus, the current flowing through the load resistor RL is (U1 - 1.4V) / RL. Because Q1 is conducting, the current flowing through RL will pass through the base and collector of Q1 to GND. The current flowing through the base of the PNP transistor Q1 is I. b It conforms to the formula (β+1)I b = (U1-1.4V) / RL.

[0042] According to the conduction characteristics of a PNP transistor, Ie = Ib + Ic = (1 + β)Ib, where Ib, Ic, and Ie are the base, collector, and emitter currents of the PNP transistor, respectively. Therefore, the current I flowing through the pull-down resistor 232 is... R1 There is I with the transistor R1 =Ic, the current flowing through the load resistor RL has an Ic relationship with the transistor. RL =Ie. Thus, by deduction, it can be concluded that the current flowing through the load resistor RL and the current flowing towards the reference component 232, i.e., towards the pull-down resistor R1, are related as Ie. RL =(1+1 / β)I R1 .

[0043] Furthermore, the ability of an MCU to convert analog signals into digital signals is common knowledge to those skilled in the art. Therefore, the ADC in the MCU can detect the voltage drop across the pull-down resistor R1. Based on the above formula, it can be deduced that...

[0044]

[0045] In this way, when the device is first powered on and before the lights are turned on, the resistance value of the load resistor RL can be measured. After the MCU obtains the resistance value, it compares it with the information table one by one to find the corresponding electrical information of the light fixture parameters, thereby controlling the constant current source to adjust the output of the corresponding electrical signal to meet different parameter setting requirements.

[0046] For example, one design scenario integrates the load resistor RL with the LED lighting load. When setting the information table, different RL values ​​correspond to different lighting models. That is, when RL is A, it corresponds to model A lighting (32V, 1A, 32W); when RL is B, it corresponds to model B lighting (20V, 0.8A, 16W); when RL is C, it corresponds to model C lighting (8V, 0.5A, 4W), and so on. In this way, when a lighting load is loaded onto the driver power system, the control module MCU can derive the resistance value of the load resistor RL inside the lighting fixture through the above series of derivations. It then compares the RL resistance value with the information in the information table. If it finds that RL = C, and the value of C corresponds to model C lighting in the information table, the MCU will command the constant current source to adjust the current, so that the output current is 0.5A, to provide the corresponding operating voltage and current for the current lighting fixture.

[0047] Of course, the load resistor RL can also be set separately from the LED lamp load, that is, two independent components. This is mainly applicable to situations where the lamp has been pre-produced and packaged. However, regardless of whether it is an integrated design or a separate design, the workflow is the same as the above idea. In this way, it is possible to configure a variety of parameters inside the lamp, which is efficient and easy to operate.

[0048] It should also be noted that the load resistance RL needs to be calculated before the light fixture is turned on because when the constant current source outputs current and the LED light fixture load is turned on, that is, after the light fixture is lit, the voltage at point b is (VCC-U). RL The voltage of a is (VCC-U1). As previously emphasized, U1 < (minimum drive voltage of LED lamp load + 1.4V), and there is a U1 voltage when the lamp is lit. RL =U LED Then there exists (50-U) RL When the voltage at point a is greater than the voltage at point b, the diode D1 is cut off, the PNP transistor Q1 is cut off, no current flows through the pull-down resistor R1, and the voltage at point c is 0. Therefore, it is impossible to detect the resistance value of the load resistor RL at this time.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An LED driver power supply system capable of configuring multiple parameters for a luminaire, comprising, A drive power module (2) that provides operating voltage to an LED lighting load (1), the drive power module (2) including a control module (21); Its features are: It also includes a load resistor RL disposed at the output end of the drive power module (2) and connected in parallel across the LED lamp load (1), wherein the load resistor RL is electrically connected to the control module (21); The control module (21) contains an information table that corresponds one-to-one with different load resistor values ​​and different lamp parameter electrical information. The control module (21) instantly obtains the resistance value of the load resistor RL before the LED lamp load (1) starts, and compares it with the information table to obtain the corresponding lamp parameter electrical information. Based on this, the electrical information currently output by the drive power module (2) is configured. The drive power module (2) also includes an adjustment module (22), a conduction module (23), and a power module (24) that provides voltage to the adjustment module (22), the conduction module (23), and the LED lighting load (1); The adjustment module (22) is set between the output terminal of the control module (21) and the load resistor RL to control the opening and closing of the LED lamp load (1) and can adjust the output electrical information according to the corresponding lamp parameter electrical information and the output information of the control module (21); The conducting module (23) is connected to the load resistor RL and the input terminal of the control module (21) respectively, and forms the first branch with the power supply module (24). The conducting module (23) turns on the first branch momentarily before the adjustment module (22) starts, and turns off after the circuit stabilizes, so that the control module (21) can obtain the resistance value by acquiring the electrical signal between the conducting module (23) and the control module (21) and using the electrical signal relationship between the conducting module (23) and the load resistor RL and the conduction characteristics of the conducting module (23). The conducting module (23) includes a conducting component (231) connected to the load resistor RL and the input terminal of the control module (21) respectively, and a constant voltage source (233) disposed between the conducting component (232) and the power module (24); The electrical signal is the current flowing through the conducting component (231) obtained by the control module (21), or the voltage value converted based on the current, or the time signal obtained by the control module. The electrical signal relationship between the conducting module (23) and the load resistor RL corresponds to the conduction characteristics of the conducting module (23). The conduction characteristics of the conducting component (231) make a fixed relationship between the current flowing through the load resistor RL and the electrical signal obtained by the control module (21). The voltage value U1 of the constant voltage source (233) is less than (the minimum driving voltage of the LED lamp load + the voltage drop between the two ends of the conducting component that are connected to the load resistor RL and the constant voltage source respectively).

2. The LED driver power supply system according to claim 1, characterized in that: The conducting component (231) is at least one PNP transistor (Q1), the base of the PNP transistor (Q1) is connected to a constant voltage source (233), the emitter is connected to a load resistor RL, and the collector is connected to the input terminal of the control module (21). The reference component (232) is a pull-down resistor R1, and the current I flowing through the pull-down resistor R1 is... R1 There is I between the conductive component and the conductive component R1 =Ic, the conduction characteristic of the conducting component (231) is Ie=Ib+Ic=(1+β)Ib, where Ib, Ic, and Ie are the base, collector, and emitter currents of the PNP transistor Q1, respectively; The electrical signal relationship between the conducting module (23) and the load resistor RL is Ie = I RL The current flowing through the load resistor RL and the current flowing towards the reference component (232) have a linear relationship I. RL =(1+1 / β)I R1 .

3. The LED driver power supply system according to claim 2, characterized in that: An anti-backflow component (234) is also connected between the constant voltage source (233) and the base of the PNP transistor (Q1).

4. The LED driver power supply system according to claim 3, characterized in that: The backflow prevention component (234) is a diode whose positive terminal is connected to the base of a PNP transistor (Q1) and whose negative terminal is connected to a constant voltage source (233).

5. The LED driver power supply system according to claim 4, characterized in that: The voltage drop between the two ends of the conducting component (231) that are connected to the load resistor RL and the constant voltage source (233) is 1.4V.

6. The LED driver power supply system according to claim 2, characterized in that: The adjustment module (22) is a constant current source or a constant current source.

7. The LED driver power supply system according to claim 1, characterized in that: The load resistor RL is integrated with the LED lamp load (1).

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