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Interfacing QE8 3.6v to a 5v PT4115 (LED driver)

Question asked by iansmusical on Oct 21, 2013
Latest reply on Oct 22, 2013 by iansmusical

Hi All,

 

I'm wanting to interface a QE8 TPM output pin which operates at a 3.6v supply to the DIM input pin of a PT4115 LED driver which is internally pulled to 5v. As far as I can see from the datasheet the QE8 pins are not 5v tolerant. Therefore, I presume I'd need a level converter circuit or have I missed something? The following circuit link looks typical, would this work?

 

http://www.google.co.uk/imgres?biw=1375&bih=701&tbm=isch&tbnid=7zPWN7a9LiqgkM:&imgrefurl=http://www.hobbytronics.co.uk/m…

 

Thank you in advance,

 

Ian

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