With the global trend of energy saving and emission reduction, LED technology is constantly innovating; from traditional incandescent lamps to energy-saving lamps with some electronic powder coated on the filament, to current LED energy-saving lamps; major semiconductor manufacturers in the world are constantly improving LED Device energy consumption, service life, heat dissipation and other technologies; In fact, the damage of the entire LED lighting system is mainly the damage of the driver, and in reality many manufacturers seem to consider the stability of the driving power supply insufficiently! LED energy-saving products have been widely used in industrial plant lighting, urban landscape, urban lighting, advertising lighting outside the window, tunnel lighting and so on! Our company combined many project experiences and made some brief introduction to the current protection of LED drive power:
Standards: IEC61000-4-5 / GB/T17626.5
Comprehensive wave 8/20US 1.25/50US Low power grid source impedance, using equivalent input 2Ω
Test Level:
Leve | Open circuit test voltage +10% |
| 1 | 0.5KV |
| 2 | 1KV |
| 3 | 2KV |
| 4 | 4KV |
| 5 | 10KV or 100KV(Mountainous or Forest Area) |
Features: The working environment of the outdoor lighting system is very harsh, and it is easy to be affected by lightning surges, the maintenance cost for the damage of the drive power source is very high.
Electrical characteristics: Requires a wide input voltage range, high constant current accuracy, and small current fluctuations.
Drive power (including constant current or constant voltage) | Suggested Options |
| 100W ≤ P ≤ 300W | Option1 |
| 50W ≤ P ≤ 100W | Option 1、 Option 2 |
15W ≤ P ≤ 50W | Option 2、 Option 3 |
| 5W ≤ P ≤15W | Option 2、Option 3、Option 4 |
It uses common and differential mode protection, and is connected in series with the discharge tube on the common differential mode line. There is no leakage current under normal conditions, and the service life of the MOV will be extended. Generally, when the MOV is found to be failure, it is an open circuit or burst. There are also special circumstances, when the MOV is short-circuited, the discharge tube will open circuit to protect the circuit, otherwise it will cause the circuit bus to trip.
It is connected in series with a NTC that suppresses inrush current. This is helpful for absorbing inrush current when the power switch (ON / OFF) is switched, reducing the occurrence of electric sparks during the switching process, and making the constant current accuracy higher and more stable. It is also conducive to extending the device life of the rectifier voltage regulator circuit in the subsequent stage.
Disadvantages
Relatively high cost, taking up some space.
Average cost performance, it uses differential mode protection, and is connected in series with the discharge tube on the differential mode line; under normal circumstances, there is no leakage current between the LN lines, and it will also extend the life of the MOV. This plan can be applied in the projects without PE protective ground wire.
It is connected in series with a NTC that suppresses inrush current. This is helpful for absorbing inrush current when the power switch (ON / OFF) is switched, reducing the occurrence of electric sparks during the switching process, and making the constant current accuracy higher and more stable. It is also conducive to extending the life cycle of the rectifier voltage regulator circuit devices in the subsequent stage.
Disadvantages
The surge voltage is only absorbed by the device, and there is no ground for proper discharge of energy
High cost performance, it uses differential mode protection, only MOV is used on the differential mode line; PCB Layout does not take up space, suitable for low power compact circuits.
It is connected in series with a NTC that suppresses inrush current. This is helpful for absorbing inrush current when the power switch (ON / OFF) is switched, reducing the occurrence of electric sparks during the switching process, and making the constant current accuracy higher and more stable. It is also conducive to extending the life cycle of the rectifier voltage regulator circuit devices in the subsequent stage.
Disadvantages
The requirements for the MOV and the flame retardancy of the chassis are relatively high.
Driving power (Including constant current or constant voltage) | Test Level IEC61000-4-5 / GB/T17626.5 | ||||
| Device | Level 0.5KV | Level 2 1.0KV | Level 3 2KV | Level 4 4KV | |
| 100W ≤ P ≤ 300W | MOV | 14D241K | 14D241K | 20D241K | 25D241K |
| NTC | 2.5D20 or D25 | 2.5D20 or D25 | 2.5D20 or D25 | 2.5D20 or D25 | |
| GDT | 2R230L-5.5 | 2R230L-6 | 2R230L-8 | 2R230L-10 | |
| 50W ≤ P ≤ 100W | MOV | 10D241K | 14D241K | 20D241K | 20D241K |
| NTC | 5D15 or D20 | 5D15 or D20 | 5D15 or D20 | 5D15 or D20 | |
| GDT | 2R230L-5.5 | 2R230L-6 | 2R230L-8 | 2R230L-10 | |
| 15W ≤ P ≤ 50W | MOV | 10D241K | 10D241K | 20D241K | 20D241K |
| NTC | 5D9 or D11 | 5D9 or D11 | 5D9 or D11 | 5D9 or D11 | |
| GDT | 2R230L-5.5 | 2R230L-6 | 2R230L-8 | 2R230L-10 | |
| 5W ≤ P ≤ 15W | MOV | 07D241K | 10D241K | NC | NC |
| NTC | 5D7 or D9 | 5D7 or D9 | NC | NC | |
| GDT | 2R230L-5.5 | 2R230L-6 | NC | NC | |
Driving power (Including constant current or constant voltage) | Test Level IEC61000-4-5 / GB/T17626.5 | ||||
| Device | Level 0.5KV | Level 2 1.0KV | Level 3 2KV | Level 4 4KV | |
| 100W ≤ P ≤ 300W | MOV | 14D511K | 20D511K | 20D511K | 25D511K |
| NTC | 2.5D15 or D20 | 2.5D15 or D20 | 2.5D15 or D20 | 2.5D15 or D20 | |
| GDT | 2R600L-6 | 2R600L-6 | 2R600L-8 | 2R600L-10 | |
| 50W ≤ P ≤ 100W | MOV | 14D511K | 14D511K | 20D511K | 25D511K |
| NTC | 5D15 or D20 | 5D15 or D20 | 5D15 or D20 | 5D15 or D20 | |
| GDT | 2R600L-6 | 2R600L-6 | 2R600L-8 | 2R600L-10 | |
| 15W ≤ P ≤ 50W | MOV | 10D511K | 10D511K | 20D511K | 25D511K |
| NTC | 10D9 or D11 | 10D9 or D11 | 10D9 or D11 | 10D9 or D11 | |
| GDT | 2R600L-6 | 2R600L-6 | 2R600L-8 | 2R600L-10 | |
| 5W ≤ P ≤ 15W | MOV | 7D511K | 7D511K | NC | NC |
| NTC | 22D7 or D9 | 22D7 or D9 | NC | NC | |
| GDT | 2R600L-6 | 2R600L-6 | NC | NC | |
Features: The working environment of the indoor lighting system is relatively prone, and it is not easy to be affected by lightning surges; but it is easily affected by the indoor electrical equipment and needs to be fully considered in terms of cost.
Electrical characteristics: The input voltage range is applicable, and the constant current accuracy is required.
Drive power (including constant current or constant voltage) | Suggested Options |
| 100W ≤ P ≤ 300W | Option 2、Option 3 |
| 50W ≤ P ≤ 100W | Option 2、Option 3、Option 4 |
| 15W ≤ P ≤ 50W | Option 3、Option 4 |
| 5W ≤ P ≤ 15W | Option 4 |
| Driving power (Including constant current or constant voltage) | Test Level IEC61000-4-5 / GB/T17626.5 | ||||
| Device | Level 1 0.5KV | Level 2 1.0KV | Level 3 2KV | Level 4 4KV | |
| 100W ≤ P ≤ 300W | MOV | 20D241K | 25D241K | NC | NC |
| NTC | 5D20 or D25 | 5D20 or D25 | NC | NC | |
| GDT | 2R230L-6 | 2R230L-6 | NC | NC | |
| 50W ≤ P ≤ 100W | MOV | 14D241K | 14D241K | NC | NC |
| NTC | 5D15 or D20 | 5D15 or D20 | NC | NC | |
| GDT | 2R230L-6 | 2R230L-6 | NC | NC | |
| 15W ≤ P ≤ 50W | MOV | 10D241K | 14D241K | NC | NC |
| NTC | 5D9 or D11 | 5D9 or D11 | NC | NC | |
| GDT | 2R230L-6 | 2R230L-6 | NC | NC | |
| 5W ≤ P ≤ 15W | MOV | 07D241K | 10D241K | NC | NC |
| NTC | 5D7 or D9 | 5D7 or D9 | NC | NC | |
| GDT | NC | NC | NC | NC | |
| Driving power (Including constant current or constant voltage) | Test Level IEC61000-4-5 / GB/T17626.5 | ||||
| Device | Level 1 0.5KV | Level 2 1.0KV | Level 3 2KV | Level 4 4KV | |
| 100W ≤ P ≤ 300W | MOV | 20D511K | 20D511K | NC | NC |
| NTC | 2.5D20 or D25 | 2.5D20 or D25 | NC | NC | |
| GDT | 2R600L-6 | 2R600L-6 | NC | NC | |
| 50W ≤ P ≤ 100W | MOV | 14D511K | 14D511K | NC | NC |
| NTC | 5D15 or D20 | 5D15 or D20 | NC | NC | |
| GDT | 2R600L-6 | 2R600L-6 | NC | NC | |
| 15W ≤ P ≤ 50W | MOV | 10D511K | 14D511K | NC | NC |
| NTC | 10D9 or D11 | 10D9 or D11 | NC | NC | |
| GDT | 2R600L-6 | 2R600L-6 | NC | NC | |
| 5W ≤ P ≤ 15W | MOV | 07D511K | 10D511K | NC | NC |
| NTC | 5D7 or D9 | 5D7 or D9 | NC | NC | |
| GDT | NC | NC | NC | NC | |
| Safety Category | Country | Standard |
| UL | USA & Canada | UL8750, UL935, UL1012, UL1310 Class 2 CSA-C22.2 No. 107.1, CSA C22.2 NO. |
| CE | Europe | EN 61347-1,EN61347-2-13 |
| EMI Standards | Country | Notes |
| EN 55015 | Europe | Conducted emission Test & Radiated emissio Test with 6 dB margin |
| FCC | USA | FCC Part 15 Class B, ANSI C63.4: 2009. |
| EMS Standards | Notes |
| EN 61000-3-2 | Harmonic current emissions |
| EN 61000-3-3 | Voltage fluctuations & flicker |
| EN 61000-4-2 | Electrostatic Discharge (ESD): 8 kV air discharge, 4 kV contact discharge |
| EN 61000-4-3 | Radio-Frequency Electromagnetic Field Susceptibility Test-RS |
| EN 61000-4-4 | Electrical Fast Transient / Burst-EFT |
| EN 61000-4-5 | Surge Immunity Test: AC Power Line: line to line 2 kV, line to earth 4 kV |
| EN 61000-4-6 | Conducted Radio Frequency Disturbances |
| EN 61000-4-8 | Power Frequency Magnetic Field Test |
| EN 61000-4-11 | Voltage Dips |
| EN 61547 | Electromagnetic Immunity Requirements Applies To Lighting Equipment |
