If the load power required is 1mW then you need to be keeping the current i=
n the 1uA range.

You don't say what kind of load it is. If it is pulsed then think of someth=
ing along the lines of a camera flash gun supply. If the load has any assoc=
iated capacitance, then make sure you use a bleed resistor.

If you are not fully committed to 2 AA batteries for power, then you might =
look at EMCO's range.

http://www.emcohighvoltage.com/pdfs/caseries.pdf

also Ultravolt,

http://www.ultravolt.com/products/1-single-output-high-voltage-modules/

or Brandenberg.

http://www.brandenburg.co.uk/

All these modules are neat, but none will produce 1KV with 3 volts input.

If you are not so experienced with HV electronics then a module is the way =
to go in my view. Its not so much safety, but rather having something that =
will work well.

Joe


-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 Paul Haggard
Sent: 02 February 2011 13:33
To: piclist@mit.edu
Subject: [EE] Very High Voltage DC Step-Up (Paul Haggard)

I'm researching a project right now that requires a step-up converter for D=
C
~3v to DC 1kV and the load consumes about 1mW.  I'm a mechanical engineer
with limited knowledge about EE and microcontrollers, but I've never dealt
with a step up converter before.  I know that this converter is (somehow)
possible to build because my research shows that this has been done, but I
do not know if a flyback transformer or switching transistor would be able
to accomplish this without significant power loss.  The intended power
source is a pair of AA alkaline batteries.  I have never dealt with such
high voltage potentials before and I'm wary to being any testing before I
come up with a strict safety guidelines and a sure way to keep the current
in the nanoamp range.  If anyone can suggest potential resources for
obtaining any relevant information, I'd be glad to do more reading; I simpl=
y
don't know where to start yet.  Thanks!  -Paul
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