I'm drawing up specs for a headphone amplifier to be used mainly with the "earbud" phones of smartphones. My first query is their typical impedance and power levels required.

I'd prefer that it also be able to drive standard "over-ear" types which are (or were so far as I remember) typically 8 ohms and perhaps half a watt.

The required outcome is, of course a suitable chip to be used. The long list on suppliers websites (Digikey etc.) convinced me to post this thread in the hope that someone with past experience here may be able to narrow the search.

Most grateful for any info, suggestions or comments.

 

Try Texas Instruments product selection guide:

http://www.ti.com/audio-ic/amplifiers/headphone-amplifiers/overview.html

You can look at LM4880 for starters.

 

Thanks indeed! I'll go look.

 

Lm4910 TI chip.

https://www.google.co.uk/url?sa=t&s...FjABegQICBAB&usg=AOvVaw2L0EcC28R7Ubr_50yQrabr

 

Great second thought, Dave. I'd marked the LM4880 as a good solution and moved on to the next thing, but eliminating the output caps is DEFINITELY a bonus. Thanks!