Circuit description
UM1996
16/29
DocID028716 Rev 2
Figure 11: X-NUCLEO-IHM08M1
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power section
4.1.2
Overcurrent detection (OCP) and current sensing measurement
Over Current Protection (OCP) is implemented by hardware with a detection circuit. The
current is compared with an embedded current reference (by the MCU) and the output
generates a fault condition at the BKIN pin that goes to ground. This pin, connected to
STM32 Nucleo board (BKIN Timer function), detects this condition and immediately
disables the driving signals (see the schematic below).
Figure 12: X-NUCLEO-IHM08M1
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OCP circuit
The current sensing inputs (refer to the following three schematics) are connected to the
sensing resistors and you can choose between a three-shunt or single-shunt configuration
through jumpers J5 and J6 (see
