Looking at a application note from Microchip HERE. It details how one could calculate the maximum power from the PV cell by utilising a buck converter with current and voltage feedbacks.
I'm trying to adopt this to make a Lead Acid Battery charger.
Schematic rotated and attached as PNG (Easier to read, and has my references)
Two questions:
1. In the red box, we see the regulated output (Vout) pin, and then J2-OUT. What is J2-OUT? If it's closed circuit then it essentially feeds the whole Vout to ground via shunt resistors R5 and R6 (Which would allow the OpAmp to measure output current) - but what purpose is that when we're trying to charge a battery? Is this jumper designed to be a momentary thing?
2. Yellow box; J1-VPV makes no sense to me. If we close circuit it, it would allow the measurement of the maximum current output of the PV cell, but drop the voltage to near zero.
Can someone please help explain this schematic in practical terms?
Thanks in advanced.
I'm trying to adopt this to make a Lead Acid Battery charger.
Schematic rotated and attached as PNG (Easier to read, and has my references)
Two questions:
1. In the red box, we see the regulated output (Vout) pin, and then J2-OUT. What is J2-OUT? If it's closed circuit then it essentially feeds the whole Vout to ground via shunt resistors R5 and R6 (Which would allow the OpAmp to measure output current) - but what purpose is that when we're trying to charge a battery? Is this jumper designed to be a momentary thing?
2. Yellow box; J1-VPV makes no sense to me. If we close circuit it, it would allow the measurement of the maximum current output of the PV cell, but drop the voltage to near zero.
Can someone please help explain this schematic in practical terms?
Thanks in advanced.
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