On Fri, 30 Nov 2007 23:43:10 GMT, the renowned "Oppie"
wrote:
"Spehro Pefhany" wrote in message
.. .
On Fri, 30 Nov 2007 14:49:15 GMT, the renowned "Oppie"
wrote:
I was updating a design that used the Allegro UDN2595 non-inverting power
driver. Allegero has discontinued most of their old power drivers and only
has a few that are not serial inputs. Toshiba has a similar part TD62384
but
it is a real pain to obtain. I was having a real problem trying to find
power drivers that would work with a 24V bus. It occurred to me that the
old
TTL series 7406 and 7407 are rated for 30V open drain and will sink 40ma.
This will definitely work in the application and they are still showing as
active (Texas Instruments).
They suck a lot of juice from the 5V rail. Maybe that's not a problem
for you.
If anybody has suggestions on other power drivers - Source or Sink for 24V
and 100 to 300ma please let me know.
ULN2003 is cheaper than 2803 and gives you 7 high current outputs
with catch diodes.
The ULN2803 was discontinued by Allegro but is still being sourced by
Toahiba snd TI in dip and soic packages.
A6801 is new from Allegro - Octal latched sink driver with cmos inputs and
darlington outputs. Interesting part.
For most of my new designs- I plan to use the Freescale MC33879 low/high
side switch. Has a SPI input and octal output switches that can be wired
to
source or sink from a 5.5 to 26.5V bus. Current limited, protected and
load
fault detection-Can detect open load or fault. With a bit of trickery, can
also be used as an input port. Two of the channels have PWM inputs.
For general purpose I/O - found a nice port expander from Microchip
MCP23S17
16bit port expander which can have any bits input or output and has
built-in
interrupt on change or condition. Available in SPI or I^2C.
Thanks for any input
Oppie
TPIC series of DMOS drivers from TI.
Best regards,
Spehro Pefhany
I tried to find a selection guide for TI's TPIC family - very confusing. Is
there a family overview that you can point me to? Thanks for your help and
comments.
Oppie
I don't know if there is an overview document. Try searching Digikey
with the TPIC prefix and you'll find them (categorized in several
ways). I've use the shift registers among others. Note that ST second
sources some of them.
Best regards,
Spehro Pefhany
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