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VND7012AY Fiches technique(PDF) 29 Page - STMicroelectronics |
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VND7012AY Fiches technique(HTML) 29 Page - STMicroelectronics |
29 / 45 page VND7012AY Application information DocID027407 Rev 4 29/45 4.4.1 Principle of Multisense signal generation Figure 33: MultiSense block diagram Current monitor When current mode is selected via MultiSense, this output is capable of providing: Current mirror proportional to the load current in normal operation, delivering current proportional to the load according to a 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 the voltage measurable on RSENSE resistor ISENSE is the current provided from MultiSense pin in current output mode |
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