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Combined voltage, current control loops simplify solar apps

11/19/2012 08:00 PM EST
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ZekeR
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re: Combined voltage, current control loops simplify solar apps
ZekeR   11/27/2012 11:24:58 PM
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@Semiman_#1: True. If you wanted to achieve temperature-invariant MPPT with this chip, it looks like you'd have to detach Vs and CSN from INTVCC, and re-attach the pins to an external temperature-sensing diode. You'd need to tweak the resistor values accordingly. I haven't shopped around, but it would seem reasonable for solar panel makers to include a temperature-sensing diode in the center of the panel; the panel's MPPT should track the diode's open-circuit voltage fairly well. If that's not the case, then you can always glue a diode to the panel and drive it with a current source (resistor to INTVCC).

Jack.L
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re: Combined voltage, current control loops simplify solar apps
Jack.L   11/25/2012 3:16:57 AM
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It's a somewhat simplistic view of maximum power point tracking and would apply to one panel, at one temperature. It would not achieve anywhere near 100% utilization in the real world as the maximum power point voltage will vary considerably with temperature ... which is impacted by solar irradiance as well.

agk
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re: Combined voltage, current control loops simplify solar apps
agk   11/20/2012 12:05:42 PM
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This chip has multiple features tied together and designers of UPS,inverters also can benefit. If this chip could be combined with a digital technology with a simple user interface to program various parameters of currents and voltages then it will be more easy to incorporate into many systems.

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