Hi...i have a question with a need for some advanced help. Basically i am building an ultra low power solar controller using two seperate comparators. One comparator turns a mosfet off if battery voltage rises above 14 volts( using resistor divider against a reference). The other comparator senses current direction to turn another mosfet on and off. These mosfets back to back on the negative line between the battery and pv panel and act as an ultra low power diode/solar panel disconnect. The circuit works with an lm393 comparator and a tl431 as a voltage reference. It draws 69 milliwatts when off...and 86 milliwatts when running.
I broke my leg and have time to focus on making this draw even less power as a pet project. I can use a lt1004 as reference voltage and lt1017 as comparator and get it down to 5.5 milliwatts off and 25.5 on. I would have to order these parts...but i recently was given a supply of lm10c chips and have been intrigued with the design.
Can i use the lm10c as my reference and two comparators? Datasheets and app notes show there is a reference voltage....a reference amp...and a precision op amp on the same chip...my question....can i use the reference 200millivolts and compare that to battery voltage and run that thru the reference buffer...using the output to turn on one of my mosfets? Then the other op amp for my current sensing circuit? This would let me realize my power savings goal and simplify my circuit without buying new parts. I know its an unconventional approach but it seems this versatile chip is used in alot of unconventional circuits.
I broke my leg and have time to focus on making this draw even less power as a pet project. I can use a lt1004 as reference voltage and lt1017 as comparator and get it down to 5.5 milliwatts off and 25.5 on. I would have to order these parts...but i recently was given a supply of lm10c chips and have been intrigued with the design.
Can i use the lm10c as my reference and two comparators? Datasheets and app notes show there is a reference voltage....a reference amp...and a precision op amp on the same chip...my question....can i use the reference 200millivolts and compare that to battery voltage and run that thru the reference buffer...using the output to turn on one of my mosfets? Then the other op amp for my current sensing circuit? This would let me realize my power savings goal and simplify my circuit without buying new parts. I know its an unconventional approach but it seems this versatile chip is used in alot of unconventional circuits.
Last edited: