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=20
A company called Allegro has some pretty good 3 phase gate driver chips, =
with 100% duty cycle possible on each leg.
=20
=20
http://www.allegromicro.com/en/Products/Categories/ICs/motor.asp
=20
That's for 3 phase motor control, but you can check whether it fits your =
design too.


> Date: Thu, 21 Aug 2008 11:45:19 -0400> From: RoUS@sourcery.org> To: pic=
list@mit.edu> Subject: Re: [PIC] Device for 3 PWM apps?> > Olin Lathrop w=
rote:> > > > Why? Even most jellybean NPN transistors will be fine for sw=
itching 30mA at> > 35V. With the PIC running at 5V and a 4.3Kohm base res=
istor, you are only> > asking for a gain of 30 from the transistor. Every=
thing is will within spec> > with comfortable margin.> > Because the LEDs=
 are in parallel (forgot to mention that), so> it's 300mA nominal, not 30=
mA.> -- > #ken P-)}> > Ken Coar, Sanagendamgagwedweinini http://Ken.Coar.=
Org/> Author, developer, opinionist http://Apache-Server.Com/> > "Millenn=
ium hand and shrimp!"> > -- > http://www.piclist.com PIC/SX FAQ & list ar=
chive> View/change your membership options at> http://mailman.mit.edu/mai=
lman/listinfo/piclist
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