LED control circuit, driving power supply and lamp
By adding capacitors to adjust current phase in the LED control circuit, the problem that the existing technology cannot meet the new harmonic standards is solved, low-cost lamp production and efficient power input quality are achieved, and the competitiveness of the product is enhanced.
Patent Information
- Application Number
- CN202422025716.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing LED control circuit cannot meet the new harmonic standards, resulting in excessive product costs and the existing technical solutions require high cost high PF isolation or non-isolated transformer modules.
A first capacitor is added between the fuse body and the rectifier module, and the phase change of the input current and voltage are adjusted. Through the coordination of the first capacitor and the filter module, the phase of the peak current and the absolute value of the 60-90° positive/negative half-wave minimum current are changed, meeting the new harmonic standard.
It achieves that while meeting the new harmonic standards, it reduces the production cost of lamps, improves the reliability of circuits and power input quality, and enhances the competitiveness of products.
Smart Images
Figure CN223207287U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lighting, and in particular relates to an LED control circuit, a driving power supply and a lamp. Background Art
[0002] After the promulgation and implementation of the GB17625.1-2022 national standard for the lighting industry, lighting equipment with a power range of 5-25W should meet the following requirements for harmonic current emission limits:
[0003] The third harmonic current expressed as a percentage of the fundamental current should not exceed 86%, and the fifth harmonic current should not exceed 61%. At the same time, when the fundamental power supply voltage crosses the zero point as the reference 0", the input current waveform should reach the current threshold at or before 60°, peak at or before 65°, and cannot drop below the current threshold before 90°. The current threshold is equal to 5% of the maximum absolute value of the peak within the measurement window. The phase angle measurement value is determined within the period including the peak absolute value, see Figure 1 .
[0004] However, after the new harmonic standards were promulgated and implemented, existing circuit technology solutions could not meet the new requirements, or required the use of expensive high-PF isolation or non-isolation transformer modules, resulting in excessively high product costs. Therefore, it is urgent to design new circuits to meet the new harmonic standards. Utility Model Content
[0005] To address the shortcomings of existing technologies, the present invention provides an LED control circuit. By adding a first capacitor between the fuse and the rectifier module, the circuit adjusts the phase shift of the input current and voltage, thereby altering the peak current phase and the absolute value of the minimum current in the 60-90° positive / negative half-wave. This ensures that the peak current phase and the absolute value of the minimum current in the 60-90° positive / negative half-wave meet the new harmonic standards. The present invention provides a driver and lamp that, through the use of an LED control circuit, not only meets the new harmonic standards but also simplifies the circuit architecture, resulting in lower production costs and greater competitiveness.
[0006] The technical effects to be achieved by the present invention are achieved through the following aspects:
[0007] In a first aspect, the utility model provides an LED control circuit, comprising a power supply module, a rectifier module, and a transformer module connected in series;
[0008] A fuse is connected between the power module and the rectifier module, a first capacitor is connected between the fuse and the rectifier module, one end of the first capacitor is connected to the live wire terminal of the power module via the fuse, and the other end of the first capacitor is connected to the neutral wire terminal of the power module;
[0009] A filter module is connected between the rectifier module and the transformer module.
[0010] In some implementations, the capacitance of the first capacitor ranges from 1 nF to 1 uF.
[0011] In some implementations, the filtering module includes a first electrolytic capacitor, a positive terminal of the first electrolytic capacitor is connected to the first terminal of the rectifier module, and a negative terminal of the first electrolytic capacitor is connected to the ground terminal.
[0012] In some implementations, the filtering module includes:
[0013] a first inductor element, the first inductor element being connected in series between the rectifier module and the transformer module; and
[0014] A second electrolytic capacitor, wherein a positive terminal of the second electrolytic capacitor is connected between the first inductor element and one end of the transformer module, and a negative terminal of the second electrolytic capacitor is connected to the ground terminal.
[0015] In some implementations, the filtering module includes:
[0016] a second inductor element, the second inductor element being connected in series between the rectifier module and the transformer module;
[0017] a third electrolytic capacitor, wherein a positive terminal of the third electrolytic capacitor is connected between the rectifier module and the second inductor element, and a negative terminal of the third electrolytic capacitor is connected to the ground terminal; and
[0018] A fourth electrolytic capacitor, wherein a positive terminal of the fourth electrolytic capacitor is connected between the second inductor element and the transformer module, and a negative terminal of the fourth electrolytic capacitor is connected to the ground terminal.
[0019] In some implementations, the transformer module is an isolation or non-isolation transformer module.
[0020] Preferably, the transformer module is a low PF isolated or non-isolated transformer module. Specifically, the low PF is a PF isolated or non-isolated transformer module with a power factor less than 0.85.
[0021] In some implementations, the LED control circuit further includes an output module and a switch control module, the output module is connected between the voltage conversion module and the lamp, and the switch control module is connected in parallel to the voltage conversion module and the filter module.
[0022] In a second aspect, the utility model provides a driving power supply including the above-mentioned LED control circuit.
[0023] In a third aspect, the present invention provides a lamp including the above-mentioned LED control circuit or the above-mentioned driving power supply. In summary, the present invention has at least the following advantages:
[0024] 1. The LED control circuit provided by the present invention adds a first capacitor between the fuse and the rectifier module, and then adjusts the phase change of the input current and voltage through the first capacitor to change the phase of the peak current and the absolute value of the minimum current of the 60-90° positive / negative half-wave, so that the adjusted peak current phase and the absolute value of the minimum current of the 60-90° positive / negative half-wave meet the new harmonic standards.
[0025] 2. By combining the filter module with the first capacitor, the problem of too little current filtering can be avoided, and the stability of harmonics can be guaranteed under long-term operation, thereby improving circuit reliability; and further filtering out clutter and optimizing harmonics to improve the input quality of the power supply.
[0026] 3. The driving power supply and lamp provided by the present invention not only meet the new harmonic standards, but also have a simple circuit structure, which reduces the production cost of the lamp and makes it more competitive. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 Schematic diagram of relative phase angle and current parameters of the new harmonic standard in the prior art.
[0028] Figure 2 Schematic diagram of the structure of the LED control circuit in Example 1.
[0029] Figure 3 Schematic diagram of the structure of the LED control circuit in Example 2.
[0030] Figure 4 Schematic diagram of the structure of the LED control circuit in Example 3.
[0031] Figure 5 Schematic diagram of the voltage, current and phase waveforms of an 8W lamp in Example 3.
[0032] Figure 6 Schematic diagram of voltage, current and phase waveforms of an 8W lamp in the prior art.
[0033] Figure 7 Schematic diagram of the voltage, current and phase waveforms of a 16W lamp in Example 3.
[0034] Figure 8 Schematic diagram of voltage, current and phase waveforms of a 24W lamp in Example 3.
[0035] Figure 9 This is a principle circuit diagram of an isolation transformer used in Example 3;
[0036] Figure 10 This is a principle circuit diagram of a non-isolated transformer used in Example 3;
[0037] Figure 11 This is a schematic diagram of the module of the driving power supply in Example 4.
[0038] Figure 12 This is a schematic diagram of the module of the lamp in Example 5.
[0039] Markings in the figure:
[0040] 1. Power module; 2. Rectifier module; 3. Transformer module; 4. Filter module; 5. Output module; 6. Switch control module; F1, fuse; C1, first capacitor; EC1, first electrolytic capacitor; L1, first inductor; EC2, second electrolytic capacitor; L2, second inductor; EC3, third electrolytic capacitor; EC4, fourth electrolytic capacitor; 7. Drive power supply; 8. LED control circuit; 9. Lamps. DETAILED DESCRIPTION
[0041] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.
[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0043] Example 1:
[0044] Please see the attached Figure 2 This embodiment provides an LED control circuit 8, comprising a power module 1, a rectifier module 2, and a transformer module 3 connected in series; wherein a fuse F1 is connected between the power module 1 and the rectifier module 2, and a first capacitor C1 is connected between the fuse F1 and the rectifier module 2. One end of the first capacitor C1 is connected to the live wire terminal of the power module 1 via the fuse F1, and the other end of the first capacitor C1 is connected to the neutral wire terminal of the power module 1; and a filter module 4 is further connected between the rectifier module 2 and the transformer module 3.
[0045] Specifically, the fuse F1 is a fuse. The first capacitor C1 is an AC capacitor. PF is a power factor. Preferably, the capacity range of the first capacitor C1 is 1nF-1uF, thereby ensuring the regulation effect on the phase of the peak current and the absolute value of the minimum current of the 60-90° positive / negative half-wave. It can be understood that the capacity selection of the first capacitor C1 can be flexibly set according to the power requirements of the lighting equipment, and the present application does not limit its specific value. And the first capacitor C1 is two or more, thereby adapting to the design of various lamps and having a wide range of adaptability. The setting of the first capacitor C1 can pre-process the current before the input rectifier module 2, thereby improving the harmonic quality of the power supply and reducing the high PF requirements of the back-end for the transformer module.
[0046] In some embodiments, the transformer module 3 can be a low-PF isolated or non-isolated transformer module 3. Specifically, a power factor less than 0.85 is considered low-PF, generally ranging from 0.5 to 0.85, and a power factor exceeding 0.95 is considered high-PF. The provision of the first capacitor C1 avoids the problem of excessive peak current caused by the use of a low-PF isolated or non-isolated transformer module 3, thereby reducing the manufacturing cost of the LED control circuit.
[0047] In other embodiments, the transformer module 3 can also be a high-PF isolated or non-isolated transformer module 3. With this configuration, high-end or cost-insensitive lighting products in the industry can use high-PF isolated or non-isolated circuits. This configuration not only meets the requirements of the new harmonic standards, but also meets the more stringent requirements of customers.
[0048] The LED control circuit 8 further includes an output module 5 and a switch control module 6 . The output module 5 is connected between the transformer module 3 and the lamp, and the switch control module 6 is connected in parallel to the transformer module 3 and the filter module 4 .
[0049] In this embodiment, a first capacitor C1 is added between the rectifier module 2 and the fuse F1. The first capacitor C1 is used to adjust the phase change of the input current and voltage, thereby changing the phase of the peak current and the absolute value of the minimum current in the 60-90° positive / negative half-wave. This allows lighting equipment with a power range of 5W ≤ rated power ≤ 25W to meet the new harmonic standards. The circuit architecture is simple and can be widely used in production. Furthermore, by adding the first capacitor C1, the transformer module 3 can be configured as a low-PF isolated or non-isolated transformer module 3, effectively reducing costs and thus achieving low costs and improving product competitiveness. The filter module 4 can further filter out clutter in the circuit, optimize harmonics, and improve circuit quality.
[0050] In some embodiments, the filter module 4 includes a first electrolytic capacitor EC1, the positive terminal of the first electrolytic capacitor EC1 is connected to the first end of the rectifier module 2, and the negative terminal of the first electrolytic capacitor EC1 is connected to the ground terminal. Through this setting, the first electrolytic capacitor EC1 can filter out clutter in the circuit, optimize harmonics, and improve circuit quality. Specifically, when the power of the lamp is 8W, the capacity of the first electrolytic capacitor EC1 is any value of 2.2-3.3uf; when the power of the lamp is 16W, the capacity of the first electrolytic capacitor EC1 is any value of 3.3-4.7uf; when the power of the lamp is 24W, the capacity of the first electrolytic capacitor EC1 is any value of 4.7-5.6uf. Among them, the capacity of the first electrolytic capacitor EC1 can be selected according to actual conditions, and the above parameters are for reference only.
[0051] In addition, by using the first capacitor C1 in conjunction with the first electrolytic capacitor EC1, the problem of too small current filtering margin can be avoided, and the stability of harmonics can be ensured under long-term operation, thereby improving circuit reliability.
[0052] Example 2:
[0053] The difference between this embodiment and embodiment 1 is that it is another solution of the filter module 4. Figure 3 The filter module 4 of this embodiment includes a first inductor L1 and a second electrolytic capacitor EC2. The first inductor L1 is connected in series between the rectifier module 2 and the transformer module 3. The positive terminal of the second electrolytic capacitor EC2 is connected between the first inductor L1 and one terminal 3 of the transformer module, and the negative terminal of the second electrolytic capacitor EC2 is connected to ground. Compared to Example 1, the addition of the first inductor L1 in this filter module 4 enhances filtering capabilities, reduces circuit interference, and thus eliminates clutter, optimizes harmonics, and improves circuit quality.
[0054] Specifically, when the power of the lamp is 8W, the inductance of the first inductor L1 can be any value between 1-3mH, and the capacity of the second electrolytic capacitor EC2 can be any value between 2.2-3.3uf; when the power of the lamp is 16W, the inductance of the first inductor L1 can be any value between 1-3mH, and the capacity of the second electrolytic capacitor EC2 can be any value between 3.3-4.7uf; when the power of the lamp is 24W, the inductance of the first inductor L1 can be any value between 1-3mH, and the capacity of the second electrolytic capacitor EC2 can be any value between 4.7-5.6uf. The inductance of the first inductor L1 and the capacity of the second electrolytic capacitor EC2 can be selected according to actual conditions.
[0055] The arrangement of the first inductor element L1 and the second electrolytic capacitor EC2 not only reduces circuit interference, filters out clutter in the circuit, optimizes harmonics, and improves circuit quality, but also avoids the problem of insufficient current filtering. Harmonic stability can be ensured during long-term operation, thereby improving circuit reliability.
[0056] Example 3:
[0057] The difference between this embodiment and embodiment 2 is that it is another solution of the filter module 4. Figure 4 The filter module 4 of this embodiment includes a second inductance element L2, a third electrolytic capacitor EC3 and a fourth electrolytic capacitor EC4: the second inductance element L2 is connected in series between the rectifier module 2 and the transformer module 3; the positive terminal of the third electrolytic capacitor EC3 is connected between the rectifier module 2 and the second inductance element L2, and the negative terminal of the third electrolytic capacitor EC3 is connected to the ground terminal; and the positive terminal of the fourth electrolytic capacitor EC4 is connected between the second inductance element L2 and the transformer module 3, and the negative terminal of the fourth electrolytic capacitor EC4 is connected to the ground terminal.
[0058] Through the setting of the above-mentioned filter module 4, compared with Example 2, a third electrolytic capacitor EC3 is added, which is equivalent to the combination of the filter modules 4 in Example 1 and Example 2, thereby having a stronger filtering ability, reducing circuit interference, thereby filtering out clutter in the circuit, optimizing harmonics, and having high operating reliability, thereby correspondingly improving circuit quality.
[0059] Specifically, when the power of the lamp is 8W, the inductance of the second inductor element L2 is any value of 1-3mH, and the capacity of the third electrolytic capacitor EC3 and the fourth electrolytic capacitor EC4 is any value of 2.2-3.3uf; when the power of the lamp is 16W, the inductance of the second inductor element L2 is any value of 1-3mH, and the capacity of the third electrolytic capacitor EC3 and the fourth electrolytic capacitor EC4 is any value of 3.3-4.7uf; when the power of the lamp is 24W, the inductance of the second inductor element L2 is any value of 1-3mH, and the capacity of the third electrolytic capacitor EC3 and the fourth electrolytic capacitor EC4 is any value of 4.7-5.6uf. Among them, the inductance of the second inductor element L2 and the capacity of the third electrolytic capacitor EC3 and the fourth electrolytic capacitor EC4 can be specifically selected according to actual conditions.
[0060] In this embodiment, the lamps with power of 8W, 16W and 24W are tested as follows:
[0061] 1. When the lamp power is 8W, please refer to Figure 5From the voltage, current, and phase waveforms, we can see that point A represents the peak current, with the measured peak current = 0.28A and the maximum peak current phase angle of 62°. Point B represents the 60-90° minimum current threshold. Under the new standard, the 60-90° minimum current threshold = peak current * 5% = 14mA. This leads to the following table 1 for test values and limits for current and phase:
[0062] Table 1
[0063]
[0064] Table 1 shows that for an 8W lamp using the above LED control circuit, the current peaks at or before 65°. The absolute value of the minimum current in the positive / negative half-wave between 60° and 90° is greater than the current threshold. Specifically, the current threshold is the peak current * 5%. The test complies with the new harmonic standards.
[0065] Also, see Figure 5 From the voltage, current, and phase waveforms, we can see that: measured fundamental current = 0.068A; 3rd harmonic limit = fundamental current * 86% = 58.5mA; 5th harmonic limit = fundamental current * 61% = 41.5mA. Furthermore, we can obtain the following Table 2 regarding the measured currents and limits for the 3rd and 5th harmonics:
[0066] Table 2
[0067]
[0068] Table 2 shows that for an 8W lamp using the above LED control circuit, the third harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 86%). The fifth harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 61%). The test complies with the new harmonic standard.
[0069] In order to reflect the superiority of this embodiment over the prior art, Figure 6 , showing the voltage, current, and phase waveforms for an 8W lamp using a solution other than this embodiment, we can see that point G represents the peak current, with the measured peak current = 0.3A and the maximum peak current phase angle being 70°; point H represents the 60-90° minimum current threshold. Under the new standard, the 60-90° minimum current threshold = peak current * 5% = 15mA. This leads to the following Table 3 for test values and limits for current and phase:
[0070] Table 3
[0071]
[0072] As shown in Table 3 above, an 8W lamp using a control circuit other than that of this embodiment cannot have a current peak at or before 65°. The absolute value of the minimum current in the positive / negative half-wave from 60° to 90° is less than the current threshold, specifically, the current threshold is peak current * 5%. The test does not meet the new harmonic standards.
[0073] 2. When the lamp power is 16W, please refer to Figure 7 From the voltage, current, and phase waveforms, we can see that point C represents the peak current, with the measured peak current = 0.48A and the maximum peak current phase angle = 59.6°. Point D represents the 60-90° minimum current threshold. Under the new standard, the 60-90° minimum current threshold = peak current * 5% = 24mA. This leads to the following Table 4 for the test values and limits for current and phase:
[0074] Table 4
[0075]
[0076] Table 4 shows that for a 16W lamp using the above LED control circuit, the current peaks at or before 65°. The absolute value of the minimum current in the positive / negative half-wave between 60° and 90° is greater than the current threshold. Specifically, the current threshold is the peak current * 5%. This test complies with the new harmonic standards.
[0077] In addition, see Figure 7 From the voltage, current, and phase waveforms, we can see that: measured fundamental current = 0.104A; 3rd harmonic limit = fundamental current * 86% = 89.4mA; 5th harmonic limit = fundamental current * 61% = 63.4mA. Furthermore, the following Table 5 on the measured currents and limits for the 3rd and 5th harmonics can be obtained:
[0078] Table 5
[0079]
[0080] Table 5 shows that for a 16W lamp using the above LED control circuit, the third harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 86%). The fifth harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 61%). The test complies with the new harmonic standard.
[0081] 3. When the lamp power is 24W, please refer to Figure 8From the voltage, current, and phase waveforms, we can see that point E represents the peak current, with the measured peak current = 0.694A and the maximum peak current phase angle = 59.3°. Point F represents the minimum current threshold between 60° and 90°. Under the new standard, the minimum current threshold between 60° and 90° = peak current * 5% = 34.7mA. This leads to the following Table 6 for test values and limits for current and phase:
[0082] Table 6
[0083]
[0084] Table 6 shows that for a 24W lamp using the above LED control circuit, the current peaks at or before 65°. The absolute value of the minimum current in the positive / negative half-wave between 60° and 90° is greater than the current threshold. Specifically, the current threshold is the peak current * 5%. This test complies with the new harmonic standards.
[0085] In addition, see Figure 8 From the voltage, current, and phase waveforms, we can see that: measured fundamental current = 0.142A; 3rd harmonic limit = fundamental current * 86% = 122.3mA; 5th harmonic limit = fundamental current * 61% = 86.7mA. The following table 7 on the measured currents and limits for the 3rd and 5th harmonics can be obtained:
[0086] Table 7
[0087]
[0088] Table 7 shows that for a 24W lamp using the above LED control circuit, the third harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 86%). The fifth harmonic current is less than the harmonic limit (specifically, the harmonic limit is fundamental current * 61%). The test complies with the new harmonic standard.
[0089] In this example, see Figure 9 , its transformer module can adopt isolation transformer module. In addition, Figure 10 As shown, the transformer module can adopt a non-isolated transformer module, which can be flexibly selected according to actual conditions.
[0090] Example 4:
[0091] This embodiment provides a driving power supply 7 based on the above embodiment. Figure 11 , including the above-mentioned LED control circuit 8. By adopting the LED control circuit 8, while meeting the new harmonic standards, it has the characteristics of simple circuit architecture and low production cost of the driving power supply product, making the product more competitive.
[0092] Example 5:
[0093] This embodiment provides a lamp 9 based on the above embodiment. Figure 12 , including the above-mentioned LED control circuit 8 or the above-mentioned driving power supply 7.
[0094] In lamps, the LED control circuit can avoid the problem of insufficient current filtering by using capacitors and electrolytic capacitors. It can ensure the stability of harmonics under long-term operation, improve circuit reliability, and thus ensure the durability of the lamp.
[0095] The above content is merely an example and illustration of the structure of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and these obvious alternative forms are all within the scope of protection of the present invention.
Claims
1. An LED control circuit, characterized in that: It includes a power supply module, a rectifier module and a transformer module connected in series; A fuse is connected between the power module and the rectifier module, a first capacitor is connected between the fuse and the rectifier module, one end of the first capacitor is connected to the live wire terminal of the power module via the fuse, and the other end of the first capacitor is connected to the neutral wire terminal of the power module; A filter module is connected between the rectifier module and the transformer module.
2. The LED control circuit according to claim 1, characterized in that: The capacitance of the first capacitor ranges from 1 nF to 1 uF.
3. The LED control circuit according to claim 1, wherein: The filtering module includes a first electrolytic capacitor, a positive terminal of the first electrolytic capacitor is connected to the first terminal of the rectifier module, and a negative terminal of the first electrolytic capacitor is connected to the ground terminal.
4. The LED control circuit according to claim 3, characterized in that: The filtering module includes: a first inductor element, the first inductor element being connected in series between the rectifier module and the transformer module; and A second electrolytic capacitor, wherein a positive terminal of the second electrolytic capacitor is connected between the first inductor element and one end of the transformer module, and a negative terminal of the first electrolytic capacitor is connected to a ground terminal.
5. The LED control circuit according to claim 1, wherein: The filtering module includes: a second inductor element, the second inductor element being connected in series between the rectifier module and the transformer module; a third electrolytic capacitor, wherein a positive terminal of the third electrolytic capacitor is connected between the rectifier module and the second inductor element, and a negative terminal of the third electrolytic capacitor is connected to the ground terminal; and A fourth electrolytic capacitor, wherein a positive terminal of the fourth electrolytic capacitor is connected between the second inductor element and the transformer module, and a negative terminal of the fourth electrolytic capacitor is connected to the ground terminal.
6. The LED control circuit according to claim 1, characterized in that: The voltage transformation module is an isolated or non-isolated voltage transformation module.
7. The LED control circuit according to claim 6, characterized in that: The voltage transformation module is a low PF isolated or non-isolated voltage transformation module.
8. The LED control circuit according to any one of claims 3 to 7, characterized in that: The LED control circuit further includes an output module and a switch control module. The output module is connected between the voltage conversion module and the lamp, and the switch control module is connected in parallel to the voltage conversion module and the filter module.
9. A driving power supply, characterized in that: The LED control circuit comprises the LED control circuit according to any one of claims 1 to 8.
10. A lamp, characterized in that The device comprises the LED control circuit according to any one of claims 1 to 8 or the driving power supply according to claim 9.