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AN3971 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN3971
Description  For photovoltaic standalone installations
PDF  28 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3971 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN3971
2/28
Doc ID 022119 Rev 2
Contents
1
Application overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Optimizing the energy from the panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
Regulations, protection, and features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
Charging a lead acid battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Constant current – constant voltage control . . . . . . . . . . . . . . . . . . . . . . . 11
3.2
SEA05 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3
Interaction between the SPV1020 and SEA05 . . . . . . . . . . . . . . . . . . . . . 12
4
External component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
Output current regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2
Battery voltage control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5
STEVAL-ISV005V2 schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6
Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7
Layout guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8
Application connection example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9
Experimental results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27



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