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From: email@example.com (Bob Wilson)
Subject: Re: I never success with 1 cell Step up switching...
Date: Tue, 12 Nov 2002 04:40:15 -0000
Organization: Your Organization
X-Newsreader: WinVN 0.99.9 (Released Version) (x86 32bit)
In article <3DD07247.918A1789@fanwap.com>, firstname.lastname@example.org says...
>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.
Well, you COULD do something radical, and learn something about the
principles of what you are designing. There is more to designing switchmode
power supplies than ramdomly trying different ICs, and selecting inductors
because they "look like resister [sic] green color and blue type".
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