[Diy_efi] (no subject)

[Torbjörn Forsman]

A datasheet for a typical ignition darlington can be found here:
http://www.st.com/stonline/products/literature/ds/1008.pdf

Best regards

Torbj?rn Forsman

ENSEMBLE J-HOLLAND wrote:
> Message: 1
> Date: Wed, 17 May 2006 19:00:02 +0200
> From: Torbj?rn Forsman <torbjorn.forsman at gengas.nu>
> Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200
> To: diy_efi at diy-efi.org
> Message-ID: <446B5692.70606 at gengas.nu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> The power stage of most ignition amplifiers from mid-70's to today is a 
> darlington power transistor, usually with an integrated C-B zener diode 
> to force turning on the transistor in case of too high transient 
> voltages. In some cases, an emitter resistor and current limiting 
> circuitry might be located on the same chip (and then, it becomes 
> relevant to talk about an IC).
> Some semiconductor manufacturers market IGBTs and Mosfets for ignition 
> applications, but i am not sure where those might be used.
> 
> Best regards
> 
> Torbj?rn Forsman
> 
> 
>    
>   Bosch used to publish a technical manual on electronic ignition systems, inside they published schematics for their system(s) and that showed the output transistor as a Darlington pair. The manual I saw was in a college library back in 1998/9 but was out of print. I have seen IGBTs marketed for ignition systems on small 2 strokes.
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