The Voltage Regulator With a Field Effect Transistor

Published:2013/3/22 2:46:00 Author:Ecco | Keyword: Voltage Regulator, Field Effect Transistor | From:SeekIC

Feature of this transistor compensation voltage (see picture) – used in the feedback field effect transistor VT3, which acts as a dynamic load for the transistor VT2. Because of this factor increases the voltage regulation: when the input voltage from 11 to 19 V output voltage varies within ± 60 mV. Rated output voltage using Zener type D814B is 9 V. Rated load stabilizer – 0.1 A. The control transistor VT1 is mounted on the radiator in the form of an aluminum plate measuring 35×40 mm, and its static current transfer ratio of about 50. Conversely, the transistor can be used MP37A MP113A transistors, and as a replacement for zener D814B – D809. If it is necessary to obtain a value of output voltage, you must apply another type of zener with a corresponding voltage stabilization. In the latter case may require selection of the resistor R1. When you replace the last one more field-effect transistor type KP102 (gate and source are connected to the zener, and runoff from the collector of the transistor VT1) rate stabilization device further increases.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/The_Voltage_Regulator_With_a_Field_Effect_Transistor.html

Print this Page | Comments | Reading(3)