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From: Tong Narak
Subject: Re: I never success with 1 cell Step up switching...
Date: Tue, 12 Nov 2002 23:08:20 +0700
Organization: C.S. Communications Co. Ltd.
NNTP-Posting-Date: Tue, 12 Nov 2002 16:08:26 +0000 (UTC)
X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U)
I pray every day and night.
I talk to god what's wrong with me ?
I saw one japanese guy. Success with TL499.
He use the green inductor and mounting on stripboard.
( I use webtranslator Japan->english http://babel.altavista.com/ )
I think those inductor and electrolye capacitor should work for
experiment but why don't work with me? with TI's chip.
These morning I got yet another chip from MAXIM MAX756/757
Maxim IC require more 2 components but I am success now!
Yes, I mounting on stripboard again because I believe it should work
for experiment. The efficiency is ~58% and MAX756 can run only
1 cell battery.
I will try to find and buy new inductors and tantalum capacitors
and make a permanent PCB.
I love MAXIM more than TI.
Maxim's datasheet is very good.
Maxim's Website is very excellent too.
Tong Narak wrote:
> Hello all,
> 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.
> So sad.
> 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.
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