The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Kevin McMurtrie
Subject: Re: I never success with 1 cell Step up switching...
User-Agent: MT-NewsWatcher/3.2 (PPC Mac OS X)
Date: Tue, 12 Nov 2002 08:57:25 GMT
NNTP-Posting-Date: Tue, 12 Nov 2002 00:57:25 PST
In article <3DD07247.918A1789@fanwap.com>, Tong Narak
>I tried to test many Chip ICs from TI but never success.
>I use instant inductors that look like resister green color
>and a blue type. Both are fail. I solder all components
>as short as possible directly to IC ( DIP300 type ).
>The output voltage is lower than the design spec.
>By the way, One IC from MAXIM MAX761 is success!
>Laughs !! I mounting on stripboard and it work very well.
>The efficiency is ~55%. These IC require 2 cells battery.
>input 2.4v 180mA
>output 12v 20mA
>MAXIM still didn't send me sample MAX619 and MAX757 to test.
>I am waiting..them...
>There are many surface mounting ICs. But I don't have idea
>how to solder them how to make a PCB that very tiny line.
Those mini blue and green inductors are NOT for power supplies. They're
strictly for very low power signals unless the specs say otherwise. You
need to read up on how to build switching power supplies. Moving power
in short bursts means that low resistances and high speeds are
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup