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AN4070 Datasheet(PDF) 8 Page - STMicroelectronics

Part # AN4070
Description  250 W grid connected microinverter
PDF  53 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4070 Datasheet(HTML) 8 Page - STMicroelectronics

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DC-DC converter design
AN4070
8/53
Doc ID 022934 Rev 1
Figure 4.
Gate driving signals of the DC-DC converter
Figure 5.
Currents through the input inductors
As the control strategy requires the two gate drive signals to be overlapped during part of
the switching period, there is an operating interval during which both the MOSFET devices
are ON and therefore both the input inductor chokes, L1 and L2, store energy. During this
interval the input current is equally divided in the two MOSFETs, as shown in Figure 6, and
no current flows across the secondary winding and the diodes. The load is supplied by the
output capacitors.



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