That is interesting. My guess is that there are lots of lazy engineers
out there that have figured out that the part works OK on 5v. That's why
experimentation is so important. If I was going to make a WAG, I'd bet
that it works at 5v although probably at slower speeds. Try it with 5v
if it is a huge savings in parts for your. Maybe it will work. If it
doesn't, then change it to 12v. (shrug) I'm assuming this isn't a
mission critical device or something that you are planning to sell, of
course.
I think that most people here don't have much experience with the
Supertex parts, although they do look neat. I have a tube of them but
haven't had a chance to try them out.
-Adam
On 6/1/2012 4:53 AM, Antoine Vanoutryve wrote:
Hi Terry.
Indeed I found only one schematic using 12V. Most of schematics available on
Google use 5V. That's why I preferred to ask. I will use 12V with transistors
then.
Thank you for your reply.
Antoine
On 01 Jun 2012, at 13:48, Terry S wrote:
The datasheet does not indicate an operating supply voltage of -0.5 to
+15v, those are the absolute maximum ratings.
Use the part within it's recommended ratings of 10.8 to 13.2 volts and
you won't have any issues. Otherwise, all bets are off.
It never ceases to amaze me when people use a part outside it's spec
and then wonder why they have problems. Would you use a lawnmower to
trim your hedge? Your weed whip to cut down a tree?
Terry
On Jun 1, 6:06 am, Pengouin<[email protected]> wrote:
Hi,
I intend to use Supertex HV5522 to build a Nixie clock with four IN-18
tubes. I found some schematics on the Internet. Some use 5V directly
connected to HV5522 and some use higher voltages (12V) with a field effect
transistor connected to a 5V MCU. I plan on using a PIC MCU running at 3.3V
to drive my HV5522. The datasheet seems to indicate that I can use any
voltage between -0.5V to +15 V, but the recommended voltage is 10V to 13V.
Does anyone uses HV5522 connected directly in 3.3? Is it working correctly?
Thanks for your help
Antoine
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