Several FREQUENTLY asked questions about LED drive power supply

Several FREQUENTLY asked questions about LED drive power supply

  • 2020-08-31
  • Views:0

Several FREQUENTLY asked questions about LED drive power supply

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  • Categories:NEWS
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  • 2020-08-31
  • Views:0

Constant current drive power supply has high reliability
High reliability of constant-current drive power supply refers to the reliability of electrical performance. Failure of every component may lead to product failure. Therefore, in addition to the reasonable basic design, it is also very clear about the downscaling use of each component. Different components have different failure modes and failure conditions, which are highly required.
Generally, the power supply manufacturers of LED ceiling lights only test the downscaling of a few key power components under extreme conditions, but do not carefully consider all the components. I don't know how many people are able to figure out the key usage and de-scaling of each device they use. The more clearly the product is designed, the more reliable and cost-effective it can be. What are the key considerations for ceramic SMT capacitors? The capacitance will change with the working voltage and the capacitance will decrease with the increase of temperature. The temperature rise of the capacitance should not exceed 20 ℃.
It's just that in our usual design, the SMT capacitor filter is very simple, and the capacity and quantity are enough without careful consideration. If the ceramic capacitor is used instead of the aluminum electrolytic capacitor for output filtering, how do you choose the capacitance value how many parallel connections are needed? What are the key considerations for the use of wound resistors as insurance? How many of you have looked closely at the voltage curve that the resistance is able to withstand in a dynamic instantaneous impact? There are a lot of things to focus on to do high reliability.


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