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UM1556 bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện UM1556
Giải thích chi tiết về linh kiện  VIPower M0-5 and M0-5Enhanced
PDF  87 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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UM1556 bảng dữ liệu(HTML) 23 Page - STMicroelectronics

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UM1556
Analogue current sense
Doc ID 023520 Rev 2
23/87
2
Analogue current sense
2.1
Introduction
With the introduction of the novel VIPower M0-5 technology, important improvements have
been introduced to the analog current sense operation.
The block diagram of a M0-5 High Side Drive with analog current sense is reported in
Figure 24.
In line with the previous generations, the current sense block has a double function:
●
Current mirror of the load current in normal operation. This delivers a current
proportional to the load current according to a known ratio named K
●
Diagnostics flag in fault conditions. This delivers a fixed voltage with a certain current
capability in case of overtemperature conditions.
The current delivered by the current sense circuit can be easily converted to a voltage by
means of an external sense resistor, thus allowing continuous load monitoring and
abnormal-condition detection.
Figure 24.
M0-5 High Side Driver with analogue current sense – block diagram
2.2
Simplified principle of operation
The simplified block diagram of the M0-5 analog current sense is shown in Figure 25.



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