Charge a capacitor with minima dissipation

[iamquantized]

I need to design a circuit to charge a capacitor with minima loss of dissipation through resistance. Any idea?

 

[alvaros]

SMPS ( Switched Mode Power Suplies ) charges capacitors through inductors and they have an efficiency of 90-95%.
Using resistances, you lost half the power in the resistance, as stated in another thread not may days ago.

 

[iamquantized]

SMPS ( Switched Mode Power Suplies ) charges capacitors through inductors and they have an efficiency of 90-95%.
Using resistances, you lost half the power in the resistance, as stated in another thread not may days ago.

Thank you. That is new to me and the circuit setup looks quite complicated, at least from what I saw on the net. Is there a simple circuit with inductor? Actually, all I need is a setup with minimum components that allows me to store more energy than dissipated. An efficiency of anything >50% will work. Thank you.

 

[berkeman]

The simplest circuits will be using the Simple Switcher series of DC-DC converters from National Semiconductor:

http://www.national.com/appinfo/power/switcher.html

Look up the application information and reference designs (and design calculators) for the "Buck" regulators -- those are the ones that take in one voltage, and regulate it down to a lower voltage using a switching transistor, an inductor, a flywheel diode, and feedback.

 

[iamquantized]

The simplest circuits will be using the Simple Switcher series of DC-DC converters from National Semiconductor:

http://www.national.com/appinfo/power/switcher.html

Look up the application information and reference designs (and design calculators) for the "Buck" regulators -- those are the ones that take in one voltage, and regulate it down to a lower voltage using a switching transistor, an inductor, a flywheel diode, and feedback.

Thank you. Any more simpler idea to achieve just a >50% power efficiency.

 

[alvaros]

myself:

they have an efficiency of 90-95%.

Too much.
Victor, manufacturer of DC-DC converters claims to achieve an efficiency of up to 90%.

Did you look at wiki ?
http://en.wikipedia.org/wiki/Smps
http://en.wikipedia.org/wiki/Boost_converter
http://en.wikipedia.org/wiki/Buck_converter

Any more simpler idea

You require, at least, one inductor, one diode, a switch ( MosFet transistor ), and any circuit to drive the switch.

 

[iamquantized]

myself: Too much.
Did you look at wiki ?
http://en.wikipedia.org/wiki/Smps
http://en.wikipedia.org/wiki/Boost_converter
http://en.wikipedia.org/wiki/Buck_converter
You require, at least, one inductor, one diode, a switch ( MosFet transistor ), and any circuit to drive the switch.

I think that is it, from wiki. Thank you!