|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Parallel voltage regulators? posted by Wade on February 6, 2001 at 11:44:50:
Better not. Check the datasheet for your regulator IC - if it doesn't say yes it means no. Paralleling with inline diodes/resistors after the feedback loop will increase output impedance; current distribution between regulators will be uneven, some will run hotter than the others.What Amper/Wattt range (old and new) are you after? If the old IC is a small low-power package, you may get around with the same type in a heavier package (say, 100mA/250mW increase to 1A/1W without heatsink). For heavier currents, the simplest way to upgrade is using an external transistor controlled by the regulator IC - again, if the IC specs allow - or upgrading to heavy-duty ICs like LT108x family. BTW, LT108x specifically allows output paralleling. For positive rail only, a TL431 with a beefy Darlington or MOSFET can source a dozen amperes. All such options mean a decent heatsink, but you can't get without it if you need more current.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Parallel voltage regulators? - klaus 13:22:21 02/06/01 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
