This week’s find is a NSI450xx/NSI500xx family of parts from On Semiconductor. It’s a two terminal constant current regulator (CCR) offered in SOD-123,SOT-223 , SMB, SMC and all the way to DPAK cases. The device can handle 45V surges and regulates current to 15-350 mA depending on the individual part number. This makes it very convenient to insert into LED strings and have them stay in regulation and constant brightness with variable input voltage. Continue reading →