Ignition updates to the Unofficial FAQ
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
> For a NPN transistor,the collector should go to the coil,and the
> emitter to ground. The other end of the coil goes to +12V.
> The internal diode shunts the back EMF around the transistor to
> ground,protecting the transistor.
>
>
> I just looked at your schematic,and it appears correct.except that
> terminal 3 of the Igniter module does not go straight to the
> Darlington base,it goes to the IC that controls the Darlington.You
> need a rectangle indicating the control IC between the Pin 3 and the
> Darlington base.Pin 1(tach drive) probably goes to the control
> IC,too,certainly not to ground,Pin 4.
>
> (the emitter of the Darlington probably goes to the control
> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
> by the IC,then to ground.)
>
More information here than I've gotten yet. Thanks.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
> For a NPN transistor,the collector should go to the coil,and the
> emitter to ground. The other end of the coil goes to +12V.
> The internal diode shunts the back EMF around the transistor to
> ground,protecting the transistor.
>
>
> I just looked at your schematic,and it appears correct.except that
> terminal 3 of the Igniter module does not go straight to the
> Darlington base,it goes to the IC that controls the Darlington.You
> need a rectangle indicating the control IC between the Pin 3 and the
> Darlington base.Pin 1(tach drive) probably goes to the control
> IC,too,certainly not to ground,Pin 4.
>
> (the emitter of the Darlington probably goes to the control
> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
> by the IC,then to ground.)
>
More information here than I've gotten yet. Thanks.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
> For a NPN transistor,the collector should go to the coil,and the
> emitter to ground. The other end of the coil goes to +12V.
> The internal diode shunts the back EMF around the transistor to
> ground,protecting the transistor.
>
>
> I just looked at your schematic,and it appears correct.except that
> terminal 3 of the Igniter module does not go straight to the
> Darlington base,it goes to the IC that controls the Darlington.You
> need a rectangle indicating the control IC between the Pin 3 and the
> Darlington base.Pin 1(tach drive) probably goes to the control
> IC,too,certainly not to ground,Pin 4.
>
> (the emitter of the Darlington probably goes to the control
> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
> by the IC,then to ground.)
>
More information here than I've gotten yet. Thanks.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
> For a NPN transistor,the collector should go to the coil,and the
> emitter to ground. The other end of the coil goes to +12V.
> The internal diode shunts the back EMF around the transistor to
> ground,protecting the transistor.
>
>
> I just looked at your schematic,and it appears correct.except that
> terminal 3 of the Igniter module does not go straight to the
> Darlington base,it goes to the IC that controls the Darlington.You
> need a rectangle indicating the control IC between the Pin 3 and the
> Darlington base.Pin 1(tach drive) probably goes to the control
> IC,too,certainly not to ground,Pin 4.
>
> (the emitter of the Darlington probably goes to the control
> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
> by the IC,then to ground.)
>
More information here than I've gotten yet. Thanks.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
"TeGGeR®" <tegger@tegger.c0m> wrote in
news:Xns966AE4D412B10tegger@207.14.113.17:
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
>
>>
>> For a NPN transistor,the collector should go to the coil,and the
>> emitter to ground. The other end of the coil goes to +12V.
>> The internal diode shunts the back EMF around the transistor to
>> ground,protecting the transistor.
>>
>>
>> I just looked at your schematic,and it appears correct.except that
>> terminal 3 of the Igniter module does not go straight to the
>> Darlington base,it goes to the IC that controls the Darlington.You
>> need a rectangle indicating the control IC between the Pin 3 and the
>> Darlington base.Pin 1(tach drive) probably goes to the control
>> IC,too,certainly not to ground,Pin 4.
>>
>> (the emitter of the Darlington probably goes to the control
>> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
>> by the IC,then to ground.)
>>
>
>
> More information here than I've gotten yet. Thanks.
>
Something additional I thought of after I sent the last post(sorry!);
The ECU does not ground the igniter module.It only sends a signal (to the
control IC inside the igniter)for the Darlington to ground the coil.If the
ECU were to be the ground for the igniter,that would mean that the entire
coil current(several amps) would have to travel through the long wire from
igniter to ECU,and the ECU itself would have to switch that high current to
ground,which is the purpose of the igniter.
--
Jim Yanik
jyanik
at
kua.net
news:Xns966AE4D412B10tegger@207.14.113.17:
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
>
>>
>> For a NPN transistor,the collector should go to the coil,and the
>> emitter to ground. The other end of the coil goes to +12V.
>> The internal diode shunts the back EMF around the transistor to
>> ground,protecting the transistor.
>>
>>
>> I just looked at your schematic,and it appears correct.except that
>> terminal 3 of the Igniter module does not go straight to the
>> Darlington base,it goes to the IC that controls the Darlington.You
>> need a rectangle indicating the control IC between the Pin 3 and the
>> Darlington base.Pin 1(tach drive) probably goes to the control
>> IC,too,certainly not to ground,Pin 4.
>>
>> (the emitter of the Darlington probably goes to the control
>> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
>> by the IC,then to ground.)
>>
>
>
> More information here than I've gotten yet. Thanks.
>
Something additional I thought of after I sent the last post(sorry!);
The ECU does not ground the igniter module.It only sends a signal (to the
control IC inside the igniter)for the Darlington to ground the coil.If the
ECU were to be the ground for the igniter,that would mean that the entire
coil current(several amps) would have to travel through the long wire from
igniter to ECU,and the ECU itself would have to switch that high current to
ground,which is the purpose of the igniter.
--
Jim Yanik
jyanik
at
kua.net
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
"TeGGeR®" <tegger@tegger.c0m> wrote in
news:Xns966AE4D412B10tegger@207.14.113.17:
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
>
>>
>> For a NPN transistor,the collector should go to the coil,and the
>> emitter to ground. The other end of the coil goes to +12V.
>> The internal diode shunts the back EMF around the transistor to
>> ground,protecting the transistor.
>>
>>
>> I just looked at your schematic,and it appears correct.except that
>> terminal 3 of the Igniter module does not go straight to the
>> Darlington base,it goes to the IC that controls the Darlington.You
>> need a rectangle indicating the control IC between the Pin 3 and the
>> Darlington base.Pin 1(tach drive) probably goes to the control
>> IC,too,certainly not to ground,Pin 4.
>>
>> (the emitter of the Darlington probably goes to the control
>> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
>> by the IC,then to ground.)
>>
>
>
> More information here than I've gotten yet. Thanks.
>
Something additional I thought of after I sent the last post(sorry!);
The ECU does not ground the igniter module.It only sends a signal (to the
control IC inside the igniter)for the Darlington to ground the coil.If the
ECU were to be the ground for the igniter,that would mean that the entire
coil current(several amps) would have to travel through the long wire from
igniter to ECU,and the ECU itself would have to switch that high current to
ground,which is the purpose of the igniter.
--
Jim Yanik
jyanik
at
kua.net
news:Xns966AE4D412B10tegger@207.14.113.17:
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966AD818247EBjyanikkuanet@129.250.170.85:
>
>
>>
>> For a NPN transistor,the collector should go to the coil,and the
>> emitter to ground. The other end of the coil goes to +12V.
>> The internal diode shunts the back EMF around the transistor to
>> ground,protecting the transistor.
>>
>>
>> I just looked at your schematic,and it appears correct.except that
>> terminal 3 of the Igniter module does not go straight to the
>> Darlington base,it goes to the IC that controls the Darlington.You
>> need a rectangle indicating the control IC between the Pin 3 and the
>> Darlington base.Pin 1(tach drive) probably goes to the control
>> IC,too,certainly not to ground,Pin 4.
>>
>> (the emitter of the Darlington probably goes to the control
>> IC,too,then thru a small value resistor[<1 ohm] for current monitoring
>> by the IC,then to ground.)
>>
>
>
> More information here than I've gotten yet. Thanks.
>
Something additional I thought of after I sent the last post(sorry!);
The ECU does not ground the igniter module.It only sends a signal (to the
control IC inside the igniter)for the Darlington to ground the coil.If the
ECU were to be the ground for the igniter,that would mean that the entire
coil current(several amps) would have to travel through the long wire from
igniter to ECU,and the ECU itself would have to switch that high current to
ground,which is the purpose of the igniter.
--
Jim Yanik
jyanik
at
kua.net
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
> Something additional I thought of after I sent the last post(sorry!);
> The ECU does not ground the igniter module.It only sends a signal (to
> the control IC inside the igniter)for the Darlington to ground the
> coil.
Then how do you explain this?
http://www.tegger.com/hondafaq/misc/rov-ign.jpg
Look a the text immediately below the title.
> If the ECU were to be the ground for the igniter,that would mean
> that the entire coil current(several amps) would have to travel
> through the long wire from igniter to ECU,and the ECU itself would
> have to switch that high current to ground,which is the purpose of the
> igniter.
>
Then I'm still looking for a definitive answer.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
> Something additional I thought of after I sent the last post(sorry!);
> The ECU does not ground the igniter module.It only sends a signal (to
> the control IC inside the igniter)for the Darlington to ground the
> coil.
Then how do you explain this?
http://www.tegger.com/hondafaq/misc/rov-ign.jpg
Look a the text immediately below the title.
> If the ECU were to be the ground for the igniter,that would mean
> that the entire coil current(several amps) would have to travel
> through the long wire from igniter to ECU,and the ECU itself would
> have to switch that high current to ground,which is the purpose of the
> igniter.
>
Then I'm still looking for a definitive answer.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
> Something additional I thought of after I sent the last post(sorry!);
> The ECU does not ground the igniter module.It only sends a signal (to
> the control IC inside the igniter)for the Darlington to ground the
> coil.
Then how do you explain this?
http://www.tegger.com/hondafaq/misc/rov-ign.jpg
Look a the text immediately below the title.
> If the ECU were to be the ground for the igniter,that would mean
> that the entire coil current(several amps) would have to travel
> through the long wire from igniter to ECU,and the ECU itself would
> have to switch that high current to ground,which is the purpose of the
> igniter.
>
Then I'm still looking for a definitive answer.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
> Something additional I thought of after I sent the last post(sorry!);
> The ECU does not ground the igniter module.It only sends a signal (to
> the control IC inside the igniter)for the Darlington to ground the
> coil.
Then how do you explain this?
http://www.tegger.com/hondafaq/misc/rov-ign.jpg
Look a the text immediately below the title.
> If the ECU were to be the ground for the igniter,that would mean
> that the entire coil current(several amps) would have to travel
> through the long wire from igniter to ECU,and the ECU itself would
> have to switch that high current to ground,which is the purpose of the
> igniter.
>
Then I'm still looking for a definitive answer.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
----- Original Message -----
From: "TeGGeR®" <tegger@tegger.c0m>
Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
Sent: Saturday, June 04, 2005 8:37 AM
Subject: Re: Ignition updates to the Unofficial FAQ
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
>
>>
>> Something additional I thought of after I sent the last post(sorry!);
>> The ECU does not ground the igniter module.It only sends a signal (to
>> the control IC inside the igniter)for the Darlington to ground the
>> coil.
>
>
> Then how do you explain this?
> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
> Look at the text immediately below the title.
>
That was how Jim got into the semantic trap to start with. The ECU supplies
a low current ground to pin 4, which grounds an input on the IC, but the
main ground - the one the coil current flows through - is the one shown in
the lower right corner of the ignitor; the metal body of the ignitor itself.
The current from pin 4 is undoubtedly in the range of 1 ma.
Mike
From: "TeGGeR®" <tegger@tegger.c0m>
Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
Sent: Saturday, June 04, 2005 8:37 AM
Subject: Re: Ignition updates to the Unofficial FAQ
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
>
>>
>> Something additional I thought of after I sent the last post(sorry!);
>> The ECU does not ground the igniter module.It only sends a signal (to
>> the control IC inside the igniter)for the Darlington to ground the
>> coil.
>
>
> Then how do you explain this?
> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
> Look at the text immediately below the title.
>
That was how Jim got into the semantic trap to start with. The ECU supplies
a low current ground to pin 4, which grounds an input on the IC, but the
main ground - the one the coil current flows through - is the one shown in
the lower right corner of the ignitor; the metal body of the ignitor itself.
The current from pin 4 is undoubtedly in the range of 1 ma.
Mike
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
----- Original Message -----
From: "TeGGeR®" <tegger@tegger.c0m>
Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
Sent: Saturday, June 04, 2005 8:37 AM
Subject: Re: Ignition updates to the Unofficial FAQ
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
>
>>
>> Something additional I thought of after I sent the last post(sorry!);
>> The ECU does not ground the igniter module.It only sends a signal (to
>> the control IC inside the igniter)for the Darlington to ground the
>> coil.
>
>
> Then how do you explain this?
> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
> Look at the text immediately below the title.
>
That was how Jim got into the semantic trap to start with. The ECU supplies
a low current ground to pin 4, which grounds an input on the IC, but the
main ground - the one the coil current flows through - is the one shown in
the lower right corner of the ignitor; the metal body of the ignitor itself.
The current from pin 4 is undoubtedly in the range of 1 ma.
Mike
From: "TeGGeR®" <tegger@tegger.c0m>
Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
Sent: Saturday, June 04, 2005 8:37 AM
Subject: Re: Ignition updates to the Unofficial FAQ
> Jim Yanik <jyanik@abuse.gov.> wrote in
> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>
>
>>
>> Something additional I thought of after I sent the last post(sorry!);
>> The ECU does not ground the igniter module.It only sends a signal (to
>> the control IC inside the igniter)for the Darlington to ground the
>> coil.
>
>
> Then how do you explain this?
> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
> Look at the text immediately below the title.
>
That was how Jim got into the semantic trap to start with. The ECU supplies
a low current ground to pin 4, which grounds an input on the IC, but the
main ground - the one the coil current flows through - is the one shown in
the lower right corner of the ignitor; the metal body of the ignitor itself.
The current from pin 4 is undoubtedly in the range of 1 ma.
Mike
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
"Michael Pardee" <michaeltnull@cybertrails.com> wrote in
news:qKSdnf1wB6OiTDzfRVn-ow@sedona.net:
> ----- Original Message -----
> From: "TeGGeR®" <tegger@tegger.c0m>
> Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
> Sent: Saturday, June 04, 2005 8:37 AM
> Subject: Re: Ignition updates to the Unofficial FAQ
>
>
>> Jim Yanik <jyanik@abuse.gov.> wrote in
>> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>>
>>
>>>
>>> Something additional I thought of after I sent the last
>>> post(sorry!); The ECU does not ground the igniter module.It only
>>> sends a signal (to the control IC inside the igniter)for the
>>> Darlington to ground the coil.
>>
>>
>> Then how do you explain this?
>> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
>> Look at the text immediately below the title.
>>
>
> That was how Jim got into the semantic trap to start with. The ECU
> supplies a low current ground to pin 4, which grounds an input on the
> IC, but the main ground - the one the coil current flows through - is
> the one shown in the lower right corner of the ignitor; the metal body
> of the ignitor itself. The current from pin 4 is undoubtedly in the
> range of 1 ma.
>
> Mike
>
>
>
Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
Thanks!
--
Jim Yanik
jyanik
at
kua.net
news:qKSdnf1wB6OiTDzfRVn-ow@sedona.net:
> ----- Original Message -----
> From: "TeGGeR®" <tegger@tegger.c0m>
> Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
> Sent: Saturday, June 04, 2005 8:37 AM
> Subject: Re: Ignition updates to the Unofficial FAQ
>
>
>> Jim Yanik <jyanik@abuse.gov.> wrote in
>> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>>
>>
>>>
>>> Something additional I thought of after I sent the last
>>> post(sorry!); The ECU does not ground the igniter module.It only
>>> sends a signal (to the control IC inside the igniter)for the
>>> Darlington to ground the coil.
>>
>>
>> Then how do you explain this?
>> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
>> Look at the text immediately below the title.
>>
>
> That was how Jim got into the semantic trap to start with. The ECU
> supplies a low current ground to pin 4, which grounds an input on the
> IC, but the main ground - the one the coil current flows through - is
> the one shown in the lower right corner of the ignitor; the metal body
> of the ignitor itself. The current from pin 4 is undoubtedly in the
> range of 1 ma.
>
> Mike
>
>
>
Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
Thanks!
--
Jim Yanik
jyanik
at
kua.net
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
"Michael Pardee" <michaeltnull@cybertrails.com> wrote in
news:qKSdnf1wB6OiTDzfRVn-ow@sedona.net:
> ----- Original Message -----
> From: "TeGGeR®" <tegger@tegger.c0m>
> Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
> Sent: Saturday, June 04, 2005 8:37 AM
> Subject: Re: Ignition updates to the Unofficial FAQ
>
>
>> Jim Yanik <jyanik@abuse.gov.> wrote in
>> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>>
>>
>>>
>>> Something additional I thought of after I sent the last
>>> post(sorry!); The ECU does not ground the igniter module.It only
>>> sends a signal (to the control IC inside the igniter)for the
>>> Darlington to ground the coil.
>>
>>
>> Then how do you explain this?
>> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
>> Look at the text immediately below the title.
>>
>
> That was how Jim got into the semantic trap to start with. The ECU
> supplies a low current ground to pin 4, which grounds an input on the
> IC, but the main ground - the one the coil current flows through - is
> the one shown in the lower right corner of the ignitor; the metal body
> of the ignitor itself. The current from pin 4 is undoubtedly in the
> range of 1 ma.
>
> Mike
>
>
>
Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
Thanks!
--
Jim Yanik
jyanik
at
kua.net
news:qKSdnf1wB6OiTDzfRVn-ow@sedona.net:
> ----- Original Message -----
> From: "TeGGeR®" <tegger@tegger.c0m>
> Newsgroups: rec.autos.makers.honda,alt.autos.acura,alt.autos.h onda
> Sent: Saturday, June 04, 2005 8:37 AM
> Subject: Re: Ignition updates to the Unofficial FAQ
>
>
>> Jim Yanik <jyanik@abuse.gov.> wrote in
>> news:Xns966B71542D3A0jyanikkuanet@129.250.170.84:
>>
>>
>>>
>>> Something additional I thought of after I sent the last
>>> post(sorry!); The ECU does not ground the igniter module.It only
>>> sends a signal (to the control IC inside the igniter)for the
>>> Darlington to ground the coil.
>>
>>
>> Then how do you explain this?
>> http://www.tegger.com/hondafaq/misc/rov-ign.jpg
>> Look at the text immediately below the title.
>>
>
> That was how Jim got into the semantic trap to start with. The ECU
> supplies a low current ground to pin 4, which grounds an input on the
> IC, but the main ground - the one the coil current flows through - is
> the one shown in the lower right corner of the ignitor; the metal body
> of the ignitor itself. The current from pin 4 is undoubtedly in the
> range of 1 ma.
>
> Mike
>
>
>
Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
Thanks!
--
Jim Yanik
jyanik
at
kua.net
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik wrote:
>
> Randolph <trash@junkmail.com> wrote in news:429D4577.2B7930FB@junkmail.com:
> > See
> > http://www.st.com/stonline/books/ascii/docs/5288.htm for details. The
> > data sheet is at http://www.st.com/stonline/books/pdf/docs/5288.pdf. The
> > data sheet shows the diode between emitter and collector.
>
> The diode is INTERNAL to the transistor package.
> Probably on the same substrate as the xstr.
Yes, that is what I meant, and that is what the data sheet shows.
> > The IC in the photo looks like it has part number U2226B, and a good
> > guess is that the TFK in the first line stand for Telefunken, a German
> > semiconductor manufacturer later renamed TEMIC and eventually bought by
> > Vishay. I have not found any data sheet for the U2226B, but I believe it
> > is an opto-coupler.
> >
>
> I found ICs that were specifically designed for ignition control and
> driving the Darlingtons,but none with the same pin count of the IC
> pictured,nor any similarity to its part number.
> I do not believe it's an optocoupler,but a full control IC.Probably with
> circuitry to square up(shape) the drive pulse,and provide enough drive
> current,and IIRC,the ICs monitored and regulated coil current.(that would
> enable faster switching)
I did some more digging, and you are right, it is not an opto-coupler.
It is indeed a chip for controlling ignition coils. It is made by
Telefunken / TEMIC, and they had a family of 3: U2225B is used when the
input is from an inductive sensor, U2226B is intended for use with a
microcontroller / microprocessor and U2227B is used when the chip is
connected directly to an optical sensor. I have not had any luck finding
the data sheet for this part.
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik wrote:
>
> Randolph <trash@junkmail.com> wrote in news:429D4577.2B7930FB@junkmail.com:
> > See
> > http://www.st.com/stonline/books/ascii/docs/5288.htm for details. The
> > data sheet is at http://www.st.com/stonline/books/pdf/docs/5288.pdf. The
> > data sheet shows the diode between emitter and collector.
>
> The diode is INTERNAL to the transistor package.
> Probably on the same substrate as the xstr.
Yes, that is what I meant, and that is what the data sheet shows.
> > The IC in the photo looks like it has part number U2226B, and a good
> > guess is that the TFK in the first line stand for Telefunken, a German
> > semiconductor manufacturer later renamed TEMIC and eventually bought by
> > Vishay. I have not found any data sheet for the U2226B, but I believe it
> > is an opto-coupler.
> >
>
> I found ICs that were specifically designed for ignition control and
> driving the Darlingtons,but none with the same pin count of the IC
> pictured,nor any similarity to its part number.
> I do not believe it's an optocoupler,but a full control IC.Probably with
> circuitry to square up(shape) the drive pulse,and provide enough drive
> current,and IIRC,the ICs monitored and regulated coil current.(that would
> enable faster switching)
I did some more digging, and you are right, it is not an opto-coupler.
It is indeed a chip for controlling ignition coils. It is made by
Telefunken / TEMIC, and they had a family of 3: U2225B is used when the
input is from an inductive sensor, U2226B is intended for use with a
microcontroller / microprocessor and U2227B is used when the chip is
connected directly to an optical sensor. I have not had any luck finding
the data sheet for this part.
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966B7FE54E0Fjyanikkuanet@129.250.170.84:
<snip>
>> That was how Jim got into the semantic trap to start with. The ECU
>> supplies a low current ground to pin 4, which grounds an input on the
>> IC, but the main ground - the one the coil current flows through - is
>> the one shown in the lower right corner of the ignitor; the metal body
>> of the ignitor itself. The current from pin 4 is undoubtedly in the
>> range of 1 ma.
>>
>> Mike
>>
>>
>>
>
> Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
>
I've removed the innards of the igniter from the graphics and will add that
body round later on, changing the yellow and orange lines around to suit.
http://www.tegger.com/hondafaq/ignit...ion/index.html
Since the workings are far more detailed than I had originally imagined, I
will leave the igniter as a "here be dragons" blank box until somebody else
decides to supply a correct schematic for me to copy.
Thanks very much to all.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966B7FE54E0Fjyanikkuanet@129.250.170.84:
<snip>
>> That was how Jim got into the semantic trap to start with. The ECU
>> supplies a low current ground to pin 4, which grounds an input on the
>> IC, but the main ground - the one the coil current flows through - is
>> the one shown in the lower right corner of the ignitor; the metal body
>> of the ignitor itself. The current from pin 4 is undoubtedly in the
>> range of 1 ma.
>>
>> Mike
>>
>>
>>
>
> Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
>
I've removed the innards of the igniter from the graphics and will add that
body round later on, changing the yellow and orange lines around to suit.
http://www.tegger.com/hondafaq/ignit...ion/index.html
Since the workings are far more detailed than I had originally imagined, I
will leave the igniter as a "here be dragons" blank box until somebody else
decides to supply a correct schematic for me to copy.
Thanks very much to all.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
Guest
Posts: n/a
Re: Ignition updates to the Unofficial FAQ
Jim Yanik <jyanik@abuse.gov.> wrote in
news:Xns966B7FE54E0Fjyanikkuanet@129.250.170.84:
<snip>
>> That was how Jim got into the semantic trap to start with. The ECU
>> supplies a low current ground to pin 4, which grounds an input on the
>> IC, but the main ground - the one the coil current flows through - is
>> the one shown in the lower right corner of the ignitor; the metal body
>> of the ignitor itself. The current from pin 4 is undoubtedly in the
>> range of 1 ma.
>>
>> Mike
>>
>>
>>
>
> Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
>
I've removed the innards of the igniter from the graphics and will add that
body round later on, changing the yellow and orange lines around to suit.
http://www.tegger.com/hondafaq/ignit...ion/index.html
Since the workings are far more detailed than I had originally imagined, I
will leave the igniter as a "here be dragons" blank box until somebody else
decides to supply a correct schematic for me to copy.
Thanks very much to all.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
news:Xns966B7FE54E0Fjyanikkuanet@129.250.170.84:
<snip>
>> That was how Jim got into the semantic trap to start with. The ECU
>> supplies a low current ground to pin 4, which grounds an input on the
>> IC, but the main ground - the one the coil current flows through - is
>> the one shown in the lower right corner of the ignitor; the metal body
>> of the ignitor itself. The current from pin 4 is undoubtedly in the
>> range of 1 ma.
>>
>> Mike
>>
>>
>>
>
> Yes,the ECU signal is a normally HI,LO(ground)-to-enable signal.
>
I've removed the innards of the igniter from the graphics and will add that
body round later on, changing the yellow and orange lines around to suit.
http://www.tegger.com/hondafaq/ignit...ion/index.html
Since the workings are far more detailed than I had originally imagined, I
will leave the igniter as a "here be dragons" blank box until somebody else
decides to supply a correct schematic for me to copy.
Thanks very much to all.
--
TeGGeR®
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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