SM3320-BATT-EV-NOPB Datasheet, PDF (4/21 Pages) Texas Instruments – AN-2121 SolarMagic™ SM3320-BATT-EV Charge Controller Reference Design

Quick Setup Procedure
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3 Quick Setup Procedure
Step 1: Verify lead-acid battery voltage less than 12V, higher than 10V.
Step 2: Connect battery to output terminals as shown in Figure 2.
Step 3: Connect Solar panel or Solar Array Simulator to the input terminals as shown in Figure 2.
Step 4: Verify battery charging current up to 9A (Average slightly under 9A).
Step 5: If battery current low, verify input operates at maximum power point voltage as specified by the
panel manufacturer.
Step 6: Verify charging profile follows the profile shown in Figure 1.
Figure 2. System Connection
4 10V Power Supply
The circuit shown in Figure 3 will provide a 10V power supply rail required to properly bias the SM72295
gate driver. The system can be configured to work with solar panels up to100V (with proper components
sizing) and down to 12V Vmp.
Figure 3. 10V Power Supply
4
AN-2121 SolarMagic™ SM3320-BATT-EV Charge Controller Reference
SNOSB76C – December 2010 – Revised May 2013
Design
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