Mp3378e Protection Pin Upd Best «GENUINE»

A thorough review of the official MP3378E datasheet from Monolithic Power Systems (MPS) confirms that there is no physical pin on the TSSOP-28EP package specifically named "UPD". The source of this term in technical discussions is likely one of two things:

These open-drain pins connect to the cathodes of individual LED strings to regulate current and monitor performance. mp3378e protection pin upd

If your MP3378E is entering a protection state (shutting down shortly after power-up), check these common failure points: A thorough review of the official MP3378E datasheet

Cycle-by-cycle over-current protection for the external MOSFET. mp3378e protection pin upd

Inputs for the four LED strings, which can handle voltages up to Protection Pin Update (Deprotection)