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[Project] Power supply for Kbd/LCD device


  • To: <ukha_d@xxxxxxx>
  • Subject: [Project] Power supply for Kbd/LCD device
  • From: "Keith Doxey" <ukha@xxxxxxx>
  • Date: Tue, 29 May 2001 22:53:00 +0100
  • Delivered-to: rich@xxxxxxx
  • Delivered-to: mailing list ukha_d@xxxxxxx
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

Done a bit of searching and the following chips look useful.

All accept upto 40V DC supply so a 40V feed with 36v backup (3 car
batteries) will keep stuff working even when the power goes off.

All are Maxim chips http://www.maximic.com

Device	Current	Vout

MAX 724	5A		2.5 - 35V
MAX 726	2A		2.5 - 35V
MAX 727	2A		5V
MAX 787	5A		5V
MXL 1074	5A		2.5 - 35V
MXL 1076	2A		2.5 - 35V

Datasheets are on the Maxim site for those interested.

I have ordered samples to see what I can "knock up". The fixed
voltage
regulators require only 6 external components and the adjustable ones
require 7 external components.

Keith




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