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| AN3432 Datasheet, PDF (1/24 Pages) STMicroelectronics – How to choose a bypass diode for a silicon panel junction box | |||
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AN3432
Application note
How to choose a bypass diode for a silicon panel junction box
Introduction
Today, the main technologies used in solar panel are polycrystalline and mono crystalline
silicon solar cells. When one solar cell of the panel is shaded while the others are
illuminated, a hot spot could appear and leads to the shaded cell destruction. The bypass
diode is an efficient solution to eliminate the âhot spotâ and maintain the current delivery. The
Schottky diode is a cost effective candidate. Its VRRM, VF/IR trade off need to fit the panel
and junction box characteristics.
This document gives a method to select the most appropriate diode versus the panel
characteristics.
September 2011
Doc ID 019041 Rev 1
1/24
www.st.com
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