Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What do the terms low side driver and high side driver mean?

  1. Dec 6, 2007 #1
    What do the terms "low side driver" and "high side driver" mean?

    Can anyone give me some information on what low side driver and high side driver mean?
  2. jcsd
  3. Dec 6, 2007 #2


    User Avatar
    Science Advisor
    Gold Member

    Low-side and high-side is sometimes used when speeking of transformer voltages.
  4. Dec 7, 2007 #3


    User Avatar

    Staff: Mentor

    Or in the context of transistors driving loads, a high side driver would normally be a PNP transistor, with the emitter connected to the + power rail, collector connected to the load (which then connects to the - power rail), and the base is pulled down to turn on the high-side PNP switch.

    A low-side driver is just that upside-down. The load connects to the + power rail, and the NPN collector connects to the load. The emitter is grounded, and the base is driven up (supplied with a positive current) to turn on the NPN transistor.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for terms side driver
One coil twisted in a figure 8 vs. two coils side-by-side