Re: Any beefy coil driver chips?

Jim Thompson wrote:
On Sat, 01 Aug 2009 08:13:45 -0700, Joerg <invalid@xxxxxxxxxxxxxxx>
wrote:

Jim Thompson wrote:
On Fri, 31 Jul 2009 17:07:13 -0700, Joerg <invalid@xxxxxxxxxxxxxxx>
wrote:

Martin Riddle wrote:
"Joerg" <invalid@xxxxxxxxxxxxxxx> wrote in message news:7detvgF277iuvU1@xxxxxxxxxxxxxxxxxxxxx
Need to drive a >30V (several amps) coil but back off once it's on to avoid a cook-out. This needs to be PWM'd because the drive electronics can't get hot at all. So I looked at coil driver chips. DRV103 and the like. Many can't stomach more than 32V which is borderline for me and the saturation voltage respectively Rdson values, well, yawn. Nothing to write home about.

Did I miss a really good chip? Else I'll just roll my own.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
Fuel injector driver like a LM1949, obsolete.
Actually I cannot find anything compatible.

Yeah, that stuff went mostly custom. Automotive injectors aren't usually driven that hard either. Here is an interesting FET from that market, looks like they goofed up the CAD symbol:

For you amateurs... that's showing the built-in current limiting ;-)

http://www.onsemi.com/pub_link/Collateral/MLD1N06CL-D.PDF
Look again, da picture on page one. In particular at where the subtrate is connected to :-)

I assume you mean "body"? Artistic license ?:-)


Yes, body.


Did you note the split source? I've done that myself... handy.


Hey, don't skedaddle over to another topic here, the body connection _is_ wrong. So, I guess your amateur remark was a bit uncalled for :-)

I am not such a fan of split source. Neither of using Rdson to measure currents. The process tolerances are too large, I like to have my own sense resistors so I can push the inductances a bit harder without white knuckles.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
.

Relevant Pages

  • Re: Any beefy coil driver chips?
    ... So I looked at coil driver chips. ... "gmail" domain blocked because of excessive spam. ... Fuel injector driver like a LM1949, ...
    (sci.electronics.design)
  • Re: EMC lab, screen room that fits a regular truck?
    ... done in a somewhat shielded environment. ... length with sleeper cab. ... "gmail" domain blocked because of excessive spam. ...
    (sci.electronics.design)
  • Re: EMC lab, screen room that fits a regular truck?
    ... length with sleeper cab. ... "gmail" domain blocked because of excessive spam. ... They tested a "famous" electric car in their indoors 10 m chamber. ...
    (sci.electronics.design)
  • Re: EMC lab, screen room that fits a regular truck?
    ... done in a somewhat shielded environment. ... length with sleeper cab. ... "gmail" domain blocked because of excessive spam. ...
    (sci.electronics.design)
  • Re: USB spectrum analyzer
    ... "gmail" domain blocked because of excessive spam. ... Anyway its still much cheaper then EMC tests ... it all pre-compliance and doesn't replace the trip to the EMC lab. ...
    (sci.electronics.design)
Loading