On Tue, 19 Sep 2006 07:23:45 +0200, Renaud
put finger to keyboard and composed:

a écrit :
Renaud Métrich wrote:

Hello,

I have a battery pack of a skiboot heating system broken (from Therm'ic
vendor).
The battery pack consists in a 5.3V battery and a 3 positions switch
enabling graduous heat in the feet. This is done thru an oscillator
outputing to a component (looking like a transistor) serving like a
power switch for the second circuit consisting in the 5.3V battery and
some heating wire of 10 ohms. Everything is CMS.
The burned component has "1AKM" written on top, but I can't find this
reference while google'ing.

Maybe some of you could help me find the exact reference or some
equivalent. I can send a schema of the circuitry if required.

Thanks in advance for your help,

Renaud.

Youre not giving us any of the info needed to identify it.

NT


Hello, circuitry is available he
http://millet.corp.free.fr/Circuit%20Thermic.pdf

The component represented as a transistor (but again maybe it is not a
transistor) is in the bottom right), connected to the 5.6K resistive
capacity.

Renaud.

Since your load does not exceed 0.5A, you could use any NPN transistor
with a low VCEsat, high hfe, and a 2A rating or better. You will find
these kinds of transistors in remote controlled cars, for example.
Some leaded types that come to mind are 2SC3420, 2SD1685, 2SC2270, and
2SD826.

- Franc Zabkar
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