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:

New Circuits



Popular Circuits

Liquid level Alert
Motor controller with Analogue Opto Isolator
Solid-state electric fence charger
Three-Decade 15Hz To 15Khz Wien-Bridge Oscillator
Programming Cable for Kenwood
Digital Radar Speedometer
A wireless color-changing decoration project
fire alarm circuit with temperature
MicroPower Solar Engine
AM Receiver
Programmable Home Security Alarm System
SH-816 ASIC holiday lights