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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VN7140ASTR датащи(PDF) 33 Page - STMicroelectronics |
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VN7140ASTR датащи(HTML) 33 Page - STMicroelectronics |
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33 / 55 page  VN7140AJ, VN7140AS Application information DocID027401 Rev 3 33/55 4.4.1 Principle of Multisense signal generation Figure 38: MultiSense block diagram Current monitor When current mode is selected in the MultiSense, this output is capable to provide: Current mirror proportional to the load current in normal operation, delivering current proportional to the load according to known ratio named K Diagnostics flag in fault conditions delivering fixed voltage VSENSEH The current delivered by the current sense circuit, ISENSE, can be easily converted to a voltage VSENSE by using an external sense resistor, RSENSE, allowing continuous load monitoring and abnormal condition detection. Normal operation (channel ON, no fault, SEn active) While device is operating in normal conditions (no fault intervention), VSENSE calculation can be done using simple equations Current provided by MultiSense output: ISENSE = IOUT/K Voltage on RSENSE: VSENSE = RSENSE · ISENSE = RSENSE · IOUT/K Where: VSENSE is voltage measurable on RSENSE resistor ISENSE is current provided from MultiSense pin in current output mode |
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