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AN4070 bảng dữ liệu(PDF) 21 Page - STMicroelectronics

tên linh kiện AN4070
Giải thích chi tiết về linh kiện  250 W grid connected microinverter
PDF  53 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN4070 bảng dữ liệu(HTML) 21 Page - STMicroelectronics

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AN4070
Schematic description
Doc ID 022934 Rev 1
21/53
connected between the gate and source of each inverter MOSFET. The supply voltage of
the inverter gate drive circuit is provided by two isolated, integrated DC-DC converters
whose input is the 5 V generated by the auxiliary power supply connected to the PV input.
The schematic of the auxiliary power supply is shown in Figure 14. The two L4971s are
connected to few external components in order to implement two buck converters used to
step down the input voltage to +15 V and to +5 V.
The 3.3 V supplying the STM32F103xx microcontroller is then generated from the 5 V using
a standard linear regulator. The 3.3 V is also used to supply a digital-to-analog converter
mounted on the demonstration board for debugging purposes.



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