Proximity sensing is a key feature in many smart applications. This feature is used for system wake-up, collision avoidance, and gesture recognition. Capacitive sensing solutions are typically implemented to achieve simple yet robust proximity detection. This application note reviews important system considerations when designing with Texas Instruments' resonator-based capacitive sensing chips, the FDC2x1y family. Guidelines for sensor system design and grounding techniques are provided through mathematical modeling and qualitative assessment of external parasitic capacitance.
This application report provides the method of calculating the maximum output current of the TPS92630-Q1 device in exterior-lighting automotive applications. The junction-to-ambient thermal resistance (RθJA) of the TPS92630-Q1 device is the key parameter when calculating the maximum output current of the TPS92630-Q1 device. This application report provides a method about how to measure the RθJA of TPS92630-Q1 reference boards. The reference boards are fabricated with different copper thickness. A comparison table of both measured and simulated RθJA of different copper thickness is given in the report for correlation.