[Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200

[Geoff Harrison]

Many power transistors have an internal emitter resistor, a 
resistive network
on the base, with zenner diode over-voltage protection, and a 
flyback diode
from collector to emitter. TV horizontal output transistors are 
just one example.
Some are also Darlington. I think that is what you have.

Mike, has the device any id on it? If Japanese, will be 2SCXXXX 
etc. I may have
specs on it.

Cheers,
Geoff

----- Original Message ----- 
From: "mark krawczuk" <krawczuk at dodo.com.au>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, May 17, 2006 9:58 PM
Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200


> hi, i just went out in the cold shed, and on page 96 of the 
> gregorys manual. it even  says it sa  power transistor .....
> mark k
>
>
>
> ----- Original Message ----- 
> From: "Mike" <niche at iinet.net.au>
> To: <diy_efi at diy-efi.org>
> Sent: Wednesday, May 17, 2006 9:00 PM
> Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 
> 0-227-100-200
>
>
>> At 07:14 PM 5/17/06, you wrote:
>>>hi,   you sure it isnt a  powr transistor  ?
>>>
>>>cause  in the manual  i am pretty sure it tells u how to 
>>>check it, and it mentions  c,b and e ?
>>
>> Yeah these are external reference pins which one can use to 
>> make
>> "some" tests however,  the reason its more than a power 
>> transistor is:-
>>
>> a.  It has a back emf zener or MOV inherent in the package
>> b.  The input (b) has a pre amp of sorts, its input current 
>> is far
>>     less than any npn power transistor for activation.
>> c.  The input of a normal power transistor pulls as much 
>> current
>>     as it can into a voltage drop of one diode, the RB30 
>> device
>>     can accept a variable 3 to 10v input without pulling more 
>> than
>>     a few milliamps and still function.
>> d.  There is an input zener of sorts as well around 12 to 
>> 14volts
>> e.  Its Vsat is about one to two times a diode drop higher 
>> than
>>     a properly biased power transistor. This may be part of 
>> the
>>     coil back emf snubbing, I'm not sure but its not power 
>> transistor
>>     behaviour as a general rule etc.
>>
>> Having said that, there may be more than one type from the
>> last 25 years. All the units I have seen have an input 
>> voltage
>> much higher than a diode drop for fully on operation.
>>
>> btw: I'm interested which manual are you referring to ?
>>
>> Rgds
>>
>> mike
>>
>>
>>
>>>mark k
>>>
>>>
>>>----- Original Message ----- From: "Mike" 
>>><niche at iinet.net.au>
>>>To: <diy_efi at diy-efi.org>
>>>Sent: Wednesday, May 17, 2006 4:54 PM
>>>Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 
>>>0-227-100-200
>>>
>>>
>>>>I'm doing an uprated RB30 ignition module and toyed
>>>>with doing a dwell adjust, worked out an easy way to
>>>>do it along with auto retard for turbo boost, but decided to
>>>>keep it simple so first one will go out on market only
>>>>as upgrade with a couple of diagnostic functions. The old
>>>>unit by Nissan/Hitachi looks like a transistor but is an
>>>>IC in a To-3 can with back emf control but loses 1.5 to 2v
>>>>saturation plus it has a slightly variable response time.
>>>>Depending on how things go I might add a timer-control
>>>>chip to provide some dwell adjust for ECUs that dont offer 
>>>>it,
>>>>mine at present does its the Skyline/RB30 ECU with 
>>>>Bosch/Hitachi
>>>>innards...
>>>>
>>>>Rgds
>>>>
>>>>mike
>>>>
>>>>
>>>>At 01:16 AM 5/17/06, you wrote:
>>>>>Guys,
>>>>>
>>>>> thank you for help.
>>>>>
>>>>> My problem is that I have to use ignition amplifier that 
>>>>> can control dwell. My ECU is not doing it, it only signals 
>>>>> when the amplifier can start charging coils and when the 
>>>>> spark should be fired.
>>>>>
>>>>> I hoped I could find one that has more than one end stage 
>>>>> in the same package... and 0-227-100-200 was my candidate, 
>>>>> as it was used even back in 80ies... but it seems like it 
>>>>> isn't. :(
>>>>>
>>>>> I guess I would have to use 4 single amplifiers then...
>>>>>
>>>>> Thanks,
>>>>> NG
>>>>>
>>>>>Send instant messages to your online friends 
>>>>>http://uk.messenger.yahoo.com
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>>>>
>>>>
>>>>Regards from
>>>>
>>>>
>>>>Mike
>>>>Perth, Western Australia
>>>>VL Commodore Fuse Rail that wont warp or melt !
>>>>Twin tyres for most sedans, trikes and motorcycle sidecars
>>>>http://niche.iinet.net.au
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>>>
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>>
>>
>> Regards from
>>
>>
>> Mike
>> Perth, Western Australia
>> VL Commodore Fuse Rail that wont warp or melt !
>> Twin tyres for most sedans, trikes and motorcycle sidecars
>> http://niche.iinet.net.au
>> _______________________________________________
>> Diy_efi mailing list
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