[time-nuts] Power supply for Thunderbolt
bob.paddock at gmail.com
Thu Aug 7 06:28:51 EDT 2008
On Thu, Aug 7, 2008 at 5:59 AM, Peter Vince <pvince at theiet.org> wrote:
>>It may be possible to stack 3 low ESR super capacitors in series
>>(maximum voltage rating is around 2v -2.5V those with higher ratings are
>>actually series connected stacks) to do this but this is a relatively
> Presumably you would need parallel resistors to ensure an even
> voltage split? And if so, are we talking about kilohms or megohms?
Current is probably to low for this application, but it is worth noting:
LTC3225 - 150mA Supercapacitor Charger
* Low Noise Constant Frequency Charging of Two Series Supercapacitors
* Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging
The part has been tested up to 400 Farads.
Anyone ever look at using the LT1533 - Ultralow Noise 1A Switching Regulator
as the basis of a power supply design?
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