Charging Super Cap w/ a battery
I'm working on a pulse power design. The duty cycle is 10%: .1sec ON @ 100mA, 1sec OFF(sleep) @ 0.1mA. The super cap (.47F) will be discharged at startup. What is the best way to combat 'inrush' at startup? My goal in this design is to power the circuit with a 3.6V battery and when the pulses (transients) occur, to power the circuit with the super cap.
So far I have the following options:
1.) using a NTC thermistor in line with a diode
2.) using a resistor in parallel with a schotky
3.) using a current limited voltage reference.
Any suggestions? The simpler the better.