high input voltage regulators using lm340


Posted on Feb 7, 2014

This circuit can generate voltage 15V. In these circuit LM340 input voltage must remain within the limits specified in the data sheet. If the device is operated above the absolute maximum input voltage rating, two failure modes can occur. With the output shorted to ground, or, even with the output is not grounded, the transistor Q1 may fail becaus


high input voltage regulators using lm340
Click here to download the full size of the above Circuit.

e it is operated with the collector-emitter voltage of about 4. 0V below the input. If the supply is available only running at a higher voltage than the specified maximum, one of the simplest ways to protect the regulator is to connect the zener diode in series with input from the device to level shift the input voltage. Here is a schematic drawing:




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Morse Code Alarm Clock
    nikon
    stepper motor controller
    A Power Management Interface Circuit For Telecom Hot Swap With Local Dc/dc Conve
    Improved vacuum tube models for SPICE
    2G—10 Band Stereo Graphic Equaliser circuit diagram
    By the driving capacitive loads MAX4223 ~ MAX4228 circuit diagram
    A simple three-way speaker crossover circuit diagram



    Top