With PWM Generators Why do designers use Greencaps ?

Discussion in 'General Electronics Chat' started by bytraper, Jul 29, 2011.

  1. bytraper

    Thread Starter Active Member

    Sep 28, 2010
    This is a question for all you guru's out there!

    I've been building different PWM modules to learn with and the one thing that always puzzles me is for nearly every design I have seen, everybody seems to use Greencaps for the frequency adjust.

    Why would I choose greencaps over say a Tantalum, Monolithic or ceramic capacitor?
  2. Audioguru

    New Member

    Dec 20, 2007
    A "greencap" is an inexpensive Oriental metalized foil capacitor that is frequently 5% and does not change value when the temperature changes.
    Tantalum and ceramic capacitors have a wide range of tolerance and change with temperature.