Novel LED anti-radiation driving system
By employing a copper substrate, varistor current-limiting resistor, bridge rectifier circuit, and linear IC in the LED driver system, combined with capacitors C1 and C2, the problem of increased size and cost of existing LED drivers under radiation environments is solved. Stable current control and efficient heat dissipation are achieved, improving the circuit's radiation resistance and reliability.
Patent Information
- Application Number
- CN202423220403.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing LED driver circuit boards contain a large number of electrolytic capacitors, which cannot withstand strong radiation, so it is necessary to add external lead blocks for nuclear protection, which increases cost and size.
The circuit employs a copper substrate, a varistor current-limiting resistor, a bridge rectifier circuit, and a linear IC. Combined with capacitors C1 and C2, the output current is controlled by the amplification region of the internal MOS of the linear IC, reducing the dependence on external electrolytic constant current. The varistor current-limiting resistor prevents high voltage surges and electromagnetic interference. Capacitors C1 and C2 are used for filtering, and the varistor current-limiting resistor is used for lightning surge protection.
Maintaining stable circuit operation under radiation conditions reduces the impact of electrolytic capacitor performance degradation, lowers cost and size, while improving the circuit's radiation resistance and reliability, and enhancing its stability and heat dissipation performance.
Smart Images
Figure CN223872435U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of LED anti-radiation drive system, specifically referring to a new type of LED anti-radiation drive system. Background Technology
[0002] LED drivers are core components of LED lighting systems, responsible for providing appropriate current and voltage to drive LED lights normally. Because LEDs are highly sensitive to current, LED drivers need to provide precise and stable current to ensure the quality of the output light. Furthermore, LED drivers must achieve high power conversion efficiency to reduce energy loss and heat generation. With the continuous development of microelectronics technology, LED drivers are becoming increasingly miniaturized and integrated, which not only reduces the size of the controller but also improves its reliability. Integrated controllers can be more easily integrated with LED luminaires, simplifying the design process. At the same time, LED drivers are also developing towards intelligence, enabling remote control, real-time monitoring, and fault diagnosis of LED luminaires through IoT technology.
[0003] Existing LED driver circuit boards are quite complex and contain a large number of electrolytic capacitors, which cannot withstand strong radiation. Therefore, it is necessary to increase the size of the lead block to provide nuclear protection for key components, which leads to increased costs and larger size. Utility Model Content
[0004] The technical problem this invention aims to solve is that existing LED driver circuit boards are complex and contain a large number of electrolytic capacitors, which cannot withstand strong radiation. Therefore, it is necessary to increase the volume of lead blocks around the circuit board to provide nuclear protection for key components, which leads to increased costs and larger size.
[0005] To achieve the above functions, the technical solution adopted by this utility model is as follows: A novel LED anti-radiation driving system includes a circuit board, a varistor current-limiting resistor, a bridge rectifier circuit, a linear IC, and an LED load terminal. The circuit board is provided with a power input terminal, which is connected to the varistor current-limiting resistor. The output terminal of the bridge rectifier circuit is connected to a capacitor C1. The output terminal of the capacitor C1 is connected to the linear IC. The output terminal of the linear IC is connected to a capacitor C2. The output terminal of the capacitor C2 is connected to the LED load terminal.
[0006] Preferably, the linear IC is subjected to a total dose of 50 kgy radiation test at a national laboratory.
[0007] Preferably, the circuit board is a copper substrate.
[0008] Preferably, the varistor current-limiting resistor can prevent high voltage surges of up to 2 / 4kV.
[0009] The beneficial effects achieved by adopting the above-described structure are as follows:
[0010] 1) The linear IC has passed the 50kgy total dose radiation test in the National Laboratory and has good radiation resistance. It can stably control the output current in the radiation environment, reduce the impact of the performance degradation of external components such as electrolytic capacitors on the circuit under radiation, and ensure the normal operation of the entire circuit. It provides a reliable driving solution for LED lighting applications in the radiation environment. Therefore, it is no longer necessary to increase the volume of lead blocks to provide nuclear protection for key components, and the size is reduced.
[0011] 2) The varistor can prevent high voltage surges of up to 2 / 4kV. In a radiation environment, it can effectively cope with abnormal high voltages in the circuit that may be caused by radiation, protect the subsequent circuit components from damage, and further enhance the radiation resistance stability of the circuit.
[0012] 3) Capacitors C1 and C2 can continue to filter abnormal signals such as electromagnetic interference that may be generated by radiation, maintain the stable operation of the circuit, and ensure that the LED load is not affected by electromagnetic interference and continues to emit light stably.
[0013] 4) The output current is mainly controlled by the amplification region of the internal MOS of the linear IC, reducing the reliance on external electrolytic constant current. Compared with traditional circuits, the capacitor function in this solution is concentrated on filtering, avoiding the use of a large number of electrolytic capacitors to achieve multiple functions such as constant current. This reduces costs, the size and weight of the circuit board, and also reduces the risk of failure caused by aging and leakage of electrolytic capacitors, thus improving the reliability and stability of the circuit.
[0014] 5) Using a copper substrate, whose thermal conductivity is much higher than that of traditional materials, can quickly conduct away the heat generated by electronic components. This efficient thermal management not only reduces energy consumption, but also helps to improve the luminous efficacy of LEDs, because overheating will reduce the brightness and efficiency of LEDs. Attached Figure Description
[0015] Figure 1 This is a circuit board structure diagram of an embodiment of the present utility model;
[0016] Figure 2 This is a circuit diagram of an embodiment of the present utility model.
[0017] The components are: 1. Circuit board; 2. Varistor current limiting resistor; 3. Bridge rectifier circuit; 4. Linear IC; 5. LED load terminal; 6. Power input terminal; 7. C1 capacitor; 8. C2 capacitor. Detailed Implementation
[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.
[0020] like Figure 1-2As shown, this utility model proposes a novel LED anti-radiation driving system, including a circuit board 1, a varistor 2, a bridge rectifier circuit 3, a linear IC 4, and an LED load terminal. The circuit board 1 has a power input terminal 6, which supplies power to the entire copper-based circuit board 1. The power input terminal 6 is connected to the varistor 2, which provides surge protection against lightning strikes, preventing high-voltage surges up to 2 / 4kV. The circuit after passing through the varistor 2 is connected to the bridge rectifier circuit 3. A capacitor C1 7 is connected to the output of the bridge rectifier circuit 3, primarily for filtering and reducing ripple output. The output of capacitor C1 7 is connected to the linear IC 4, which controls the output current. A capacitor C2 8 is connected to the output of the linear IC 4, also providing filtering to reduce EMI impact on the power grid. The output of capacitor C2 8 is connected to the LED load terminal 5. In this technical solution, the output current is mainly controlled by the linear IC 4. 4. By controlling the output current through the amplification region of the internal MOS, the dependence on external electrolytic constant current is reduced. For capacitors C1 (7) and C2 (8), they are mainly used for filtering to reduce the impact of ripple and EMI on the power grid, rather than for constant current control. Compared with traditional circuits that may use a large number of electrolytic capacitors for various functions such as constant current, the function of the capacitors in this scheme is more focused on filtering. Therefore, the number of electrolytic capacitors used in the overall circuit design is reduced. In a radiation environment, the linear IC 4 can maintain stable control of the output current. The varistor current limiting resistor 2 can still prevent abnormal high voltage in the circuit that may be caused by radiation. Capacitors C1 (7) and C2 (8) can continue to filter abnormal signals such as electromagnetic interference that may be generated by radiation, thereby ensuring the normal operation of the entire circuit.
[0021] The linear IC 4 passed the 50 kgy total dose radiation experiment at the National Laboratory. To control the output current, the linear IC 4 does not require an external electrolytic constant current converter. Instead, it controls the output current through the amplification region of the internal MOS, stabilizing the light source lifespan and achieving the radiation resistance effect of the circuit electronic components. This indicates that the linear IC 4 itself has good radiation resistance performance. In the circuit, because it can stably control the output current, it does not require an external electrolytic constant current converter, reducing the impact of potential performance degradation of external electrolytic capacitors and other components in the radiation environment on the circuit.
[0022] The circuit board 1 is a copper substrate, which can significantly improve heat dissipation efficiency. Copper has excellent thermal conductivity, with a thermal conductivity coefficient much higher than that of traditional materials. This allows the copper substrate to quickly conduct away the heat generated by electronic components. This efficient thermal management not only reduces energy consumption but also helps improve the luminous efficacy of LEDs, as overheating reduces the brightness and efficiency of LEDs. In addition, good heat dissipation can extend the lifespan of LEDs and reduce the failure rate caused by thermal stress.
[0023] In practical applications, under radiation conditions, the linear IC 4 can maintain stable control of the output current, the varistor current-limiting resistor 2 can still prevent abnormal high voltage in the circuit that may be caused by radiation, and capacitors C1 7 and C2 8 can continue to filter abnormal signals such as electromagnetic interference that may be generated by radiation. Through the synergistic effect of the above-mentioned components, under radiation conditions, this technical solution can effectively ensure the normal operation of the circuit, reduce the impact of radiation on the LED driving system, and maintain the stable light emission and normal operation of the LED.
[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A novel LED anti-radiation driving system, characterized in that: The circuit includes a circuit board (1), a varistor current limiting resistor (2), a bridge rectifier circuit (3), a linear IC (4), and an LED load terminal. The circuit board (1) is provided with a power input terminal (6), which is connected to the varistor current limiting resistor (2). The output terminal of the bridge rectifier circuit (3) is connected to a capacitor C1, which is connected to the linear IC (4). The output terminal of the linear IC (4) is connected to a capacitor C2, which is connected to the LED load terminal (5).
2. The novel LED anti-radiation driving system according to claim 1, characterized in that: The circuit board (1) is a copper substrate.
3. The novel LED anti-radiation driving system according to claim 1, characterized in that: The varistor current-limiting resistor (2) can prevent high voltage surges of up to 2 / 4kV.