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AN3392 bảng dữ liệu(PDF) 20 Page - STMicroelectronics

tên linh kiện AN3392
Giải thích chi tiết về linh kiện  The SPV1020 is a monolithic DC-DC boost converter designed
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN3392 bảng dữ liệu(HTML) 20 Page - STMicroelectronics

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SPV1020 functions
AN3392
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Doc ID 018749 Rev 1
Figure 19.
Normal/MPPT mode, DCM vs. CM FSM
In the case of DCM, input current can be negligible and its sampled value may be strongly
affected by the noise caused by the switching elements. Input power is computed as follows,
avoiding the use of the input current:
Equation 4
In the case of CM, input power is computed by multiplying the sampled voltage and the
sampled current:
Equation 5
Input voltage is sampled by an external resistive divider, while the input current is sampled
internally to reduce the number of external components in the application. Figure 20 shows
a simple schematic of the input voltage sensing circuitry (see Section 10 for values of the
components shown).
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