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LED drive circuits can be very simple or can be complicated such as switching regulators which are highly efficient but are often complex, expensive and have the potential for electromagnetic interference. Linear regulators do not have EMI issues and cost less than a switching regulator but are much less efficient. The simplest circuit is the current limiting resistor which is the lowest cost and has no EMI issues, but it can only be used if the input voltage is regulated.
PTM Published on: 2011-11-03
Austria