[time-nuts] Thunderbolt Supply

[Kevin Rosenberg]

On Feb 11, 2011, at 9:44 PM, Neville Michie wrote:
> [...]For the minus 12v I used a ICL7662, these are rare, so a cmos gate oscillator and diode pump negative generator could be used. I am told the -12V is quite uncritical.[...]

Thanks for the thoughts. I'm thinking about redoing the power supplies for my T-bolts.
So, your comments are helpful.

May I ask where is the ICL7662 rare? Digikey has over 20K in various forms.

I've also heard that the 5V supply is not noise critical. For your minimum power goal,
I imagine that's why you used a switcher rather than lose up to 0.4A x 7V (2.8W) using
a linear 5V regular off the +12V line.

Kevin