AN4217 Datasheet, PDF (1/22 Pages) STMicroelectronics – Designing the SPV1020 with serial and parallel output configurations

AN4217
Application note
Designing the SPV1020 with serial and parallel output
configurations
By Massimiliano Santo Antonino RAGUSA
Introduction
The STEVAL-ISV008V1 and STEVAL-ISV018V1 demonstration boards are based on
STMicroelectronics’ photovoltaic products SPV1020, SPV1001N30 and SPV1001N40.
These boards are designed for innovative distributed PV panels and their size is suitable for
most junction boxes available on the market. Each PCB uses three of the SPV1020 solar
boost MPPT regulators, whose outputs can be connected in parallel (STEVAL-ISV008V1) or
in series (STEVAL-ISV018V1).
Details on the SPV1020 device can be found in the product’s datasheet, and in application
note AN3392, both available at www.st.com.
The SPV1001N30 is used as a high efficiency bypass device between the input and output.
It automatically turns ON when the SPV1020 is OFF due to an input voltage lower than its
UVLO.
The SPV1001N40 is used as a high efficiency bypass device at the output stage of each
SPV1020. It automatically turns ON when the SPV1020 is OFF, offering a low impedance
path from V_OUT- to the output rail V_OUT+, as shown in Figure 5.
January 2013
Doc ID 024010 Rev 1
1/22
www.st.com