I have a 9 volt battery charging a capacitor to 90 volts. It takes about 2 seconds from startup to full charge. This is a pulse application with fresh startup on each pulse. But with little use the battery drain pulls down the 5 volt voltage regulator so the microcontroller running the system browns out.
I’d like to improve battery life by slowing the rate of charge. I can give the circuit up to 12 seconds to charge up.
What’s the best way to do this?
My current ideas include,
ramping up the duty cycle of the switch mode power supply,
ramp up the feedback voltage limit.
I’d like to improve battery life by slowing the rate of charge. I can give the circuit up to 12 seconds to charge up.
What’s the best way to do this?
My current ideas include,
ramping up the duty cycle of the switch mode power supply,
ramp up the feedback voltage limit.