Allegro recommends a 4-layer PCB with a solid ground plane, and the use of vias to connect the GND pins to the ground plane. Additionally, keep the high-current paths short and wide, and use a common mode choke to filter the input voltage.
Use a heat sink with a thermal resistance of 10°C/W or lower, and apply a thermal interface material (TIM) with a thermal conductivity of 5 W/m-K or higher. Ensure good airflow around the device, and avoid blocking the airflow with nearby components.
Allegro recommends using a low-ESR ceramic capacitor with a value of 10 μF to 22 μF, and a voltage rating of 25 V or higher. The capacitor should be placed as close as possible to the VIN pin.
Check the input voltage, output voltage, and current sense resistor values. Verify that the device is properly configured, and that the enable pin is properly biased. Use an oscilloscope to check for oscillations, and consult the Allegro application note AN296070 for troubleshooting guidelines.
Yes, the AHV85110KNHTR is AEC-Q100 qualified, which means it meets the stringent requirements for automotive applications. However, ensure that the device is used within its specified operating conditions, and that the system design meets the relevant automotive standards.
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