SM3320-BATT-EV-NOPB Datasheet, PDF (10/21 Pages) Texas Instruments – AN-2121 SolarMagic™ SM3320-BATT-EV Charge Controller Reference Design

MPPT
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12 MPPT
The SM72442 chip will perform the MPPT function using an implementation of the Perturb and Observe
algorithm method. The MPPT algorithm will extract maximum power from the solar panel and deliver it to
the battery regardless of the panel’s characteristics. Figure 14 and Figure 15 show the effect on the panel
voltage as the MPPT algorithm maintains constant power at the panel regardless of the voltage on the
battery.
Figure 14. Battery Charging with
V_Panel < V_Battery (Boost)
Figure 15. Battery Charging with
V_Panel > V_Battery (Buck)
10
AN-2121 SolarMagic™ SM3320-BATT-EV Charge Controller Reference
SNOSB76C – December 2010 – Revised May 2013
Design
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