hi
the rated output wich is stamped on all the digital gubbins by scaley says 16v max.I have and do run at varying voltages from 11v-15v depending on motor type.
LMP cars are always run at 15v and i have never blown a chip in nearly 5 years or had a lc section pack up.It may be worth taking a voltage reading at the rails to see whats actually there.
If you dial in 15v at the psu you should see a reading of about 13.8 at the rails as the pb itself draws just over a volt.