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Why should a 20% margin be reserved for LED switch power supply?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
The widespread application of LED switching power supplies in modern lighting systems has brought enormous convenience and benefits to the lighting industry. However, behind the shining LED lights, a seemingly small but crucial issue has attracted high attention from professionals: why should a 20% margin be reserved when designing LED switch power supplies? Is there some kind of electric spark hidden behind this number, which becomes an indispensable key to ensuring the normal operation of the lighting system? Now let's unravel this mystery of light together.



Stability guarantee:

In actual operation, there may be some fluctuations or uncertain factors in the circuit, such as internal components, capacitors, and inductors of the power supply, which may cause some fluctuations during operation, especially in switching power supplies with high switching frequencies. Reserving a 20% margin can ensure that the LED power supply can provide sufficient power in various situations, avoiding power instability caused by load fluctuations or sudden demands.

Extended lifespan:

If the LED switch power supply operates under different temperature conditions, the electrical characteristics of the components may change, affecting the output of the power supply. Reserve margin can reduce the workload of LED switching power supplies, reduce temperature and losses, and help improve the lifespan of the power supply. Power sources that work under lower loads are usually more stable and durable.

To cope with peak demand:

In certain instantaneous peak demand situations, such as instantaneous changes in load caused by the switch, brightness adjustment, or other operations of lighting fixtures. LED switch power supplies require additional power. Reserving a 20% margin can ensure that the power supply can respond to these peak demands in a short period of time and ensure the normal operation of the LED.

Prevent excessive load:

Different types of LED loads (such as different types of LED lamps) may have different requirements for the power supply, and changes in the load may cause power fluctuations. Reserve margin can prevent LED power supply from working under excessive load for a long time, and prevent damage to the power supply due to prolonged high load.
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