LM338 | Electronic Project Circuits

Posts Tagged ‘LM338’

1-20V 10A adjustable dc power supply by LM338

1.2V-20V 10A adjustable dc power supply by LM338
A friend of me side radio amateur office. He wants Variable Regulate Power Supply high current about 10A go up. I then advise this circuit , because build easy. Use IC LM338 and IC LM107 again normal IC LM338 have current about 5A then must use 2 pcs. Make enhance current get be 10A besides. Still three fine VR1 make output modify since 1.2V to 20V cover usual usability sir. A friend of me has may glad that see circuit this idea. You may think like with that be lucky.

Be the first to comment - What do you think? Posted by admin - August 6, 2008 at 2:03 pm

Categories: High current power supply, Variable Regulator Tags: High current power supply, LM338, Variable Regulator

+12V -12V 5A Regulated Power Supply by LM338

My “regulated monster” is currently running 0.5-0.6 Amps bias per Hiraga’s recommendations in the article. I tested the power supply which you may recognize as the PCB for the John Linsley-Hood simple Class A amplifier 1996 version from Williams Hart Electronics. I have upgraded the supply with LM338K TO-3 case regulators in lieu of the original LM338T TO-220 regulators (see LM338 Voltage Regulator Calculator for more information). On the bench the supply measures very well in this configuration with below 160-200uV of ripple pk-pk under a 2A series load. Despite this low level of noise, I would like to try the battery supply for its huge current capability and as close to zero noise as possible.

Read More Source:
http://diyaudioprojects.com/Solid/Jean-Hiraga-Le-Monstre/index.htm
Thank you.

Be the first to comment - What do you think? Posted by admin - April 23, 2008 at 11:53 am

Categories: Power supply Tags: dc voltage regulator, dual power supply, LM338

power supply +20V and -20V 5A by LM338

Here is Circuit power supply +20V and -20V 5A,Use IC LM338.
Nick initially adjusted the quiescent current to 3.5A but found after listening tests that increasing this to 4A gave a noticeable improvement. Even at an Iq of 4A the amps run cool due to the substantial heatsinking (0.5degC/W for each output device and each LM338K). Variations in quiescent current and dc offset with temperature are minimal, with an Iq of 3.8A and a dc offset of less than 35mV at switch-on.

Read More Source:http://www.tcaas.btinternet.co.uk/jlhesl.htm
Thank you.