Understanding the basic about transistor


Closed Thread
Results 1 to 2 of 2
  1. #1

    Default Understanding the basic about transistor

    I have a transistor 2N2222A. The max Vbe is 6V - I understood that.

    Can I ask if it is OK to pull the base -20v below emitter? The datasheet does not specify any -ve limit. Can someone help me understand this basic concept?
    Thanks
    ___________________
    WHY things get boring when they work just fine?

  2. #2
    Join Date
    Nov 2007
    Location
    West Covina, CA
    Posts
    219


    Did you find this post helpful? Yes | No

    Default Re: Understanding the basic about transistor

    The Vbe is 0.6V. The positive voltage on the base with respect to the emitter referring to Base-Emitter saturation and also causing Collector-Emitter saturation.
    Looking at a datasheet, the 6V referred to is the Emitter-Base Breakdown Voltage. This would mean a max of +6V at the emitter with respect to the base putting a Max -6V at the base.
    So a -20V is too much.
    Louie

Similar Threads

  1. Transistor Affecting Timings?
    By RossWaddell in forum mel PIC BASIC Pro
    Replies: 25
    Last Post: - 21st April 2012, 04:55
  2. PIC Basic Code Understanding
    By pr2don in forum mel PIC BASIC Pro
    Replies: 14
    Last Post: - 8th June 2010, 15:33
  3. NPN Transistor
    By rondo2 in forum General
    Replies: 1
    Last Post: - 10th September 2009, 02:44
  4. Choosing a transistor
    By The Master in forum Off Topic
    Replies: 51
    Last Post: - 1st October 2008, 22:16
  5. LED with Transistor
    By mimi_deviL in forum Schematics
    Replies: 2
    Last Post: - 9th February 2008, 08:03

Members who have read this thread : 0

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts