Compared with LED lighting, the structure of LED driver is more complicated, and there will be more factors to check, so that LED driver often fails before LED lighting. It’s estimated that, more than 80% of led lighting breakdown results from the failure of the power supply. There are many reasons leading to the failure of LED driver, which can be summarized into the following categories.
1. Aging of electronic components
Electronic components, including resistor, capacitor, diode, transistor, LED, connector, IC and other devices go wrong like open circuit, short circuit, burn, leakage, functional failure, electrical parameters unqualified, unstable failure and other problems.
2. PCB quality problem
Problems including PCB & PCBA poor wetting, board explosion, stratification, CAF, open circuit, short circuit and other problems.
3. Poor dissipation
The driver circuit consists of electronic components, a few of which are very sensitive to temperature. Take the electrolytic capacitor, the common life estimation formula of electrolytic capacitor is "every 10 degrees of temperature reduction, life is doubled", poor heat dissipation is likely to lead to its life greatly shortened, failure in advance, resulting in failure of LED voltage, lamps and lanterns. Especially for built-in power supply ( power supply that installed inside the lamp), the heat source will increase the difficulty of heat conduction and heat dissipation of the whole lamp, LED temperature will rise, its light efficiency and life spam will greatly decrease. So in the design of LED power supply, we should pay attention to its own heat dissipation problem. Therefore, the above problems can be solved by evaluating the lamp design at the beginning and synchronizing the design of the power supply. In the design, the heat dissipation of LED and power supply should be considered comprehensively, and the temperature rise of lamps and lanterns should be controlled as a whole, so as to design better lamps and lanterns.
Post time: Mar-31-2022