Sensors

Overcurrent detection for diagnostics in automotive safety systems

27th September 2019
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The electrification of vehicles is occurring not only in powertrain systems such as traction inverters, battery management and electric power steering, but also in automotive safety systems such as anti-lock brake systems or automated driving. Knowing that these systems are operating within the correct operational guidelines will be vital to helping ensure vehicle safety. 

Accurate measurement of current and a fast fault response time are critical to enabling debugging and diagnostics in these systems.

The errors caused by the shunt, gain and divider between the amplifier and comparator all contribute to a worst-case current measurement error. Depending on this error level, you will have to build margin into your design to ensure that it does not exceed the required operating parameters.

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