Infineon provides a recommended PCB layout in the application note AN-978, which includes guidelines for thermal vias, copper pours, and component placement to ensure optimal thermal performance.
To ensure reliable operation at high temperatures, it's essential to follow the recommended thermal design guidelines, use a suitable heat sink, and ensure proper airflow. Additionally, consider using a thermistor or thermal sensor to monitor the device temperature and implement thermal protection mechanisms.
Although the datasheet specifies a maximum VCC voltage of 15V, it's recommended to limit the voltage to 12V to ensure reliable operation and prevent damage to the device.
The IRS2118PBF has a built-in dead time generator that ensures a minimum dead time of 100ns between the high-side and low-side switches. However, if additional dead time is required, it can be achieved by adding an external resistor-capacitor (RC) network between the SD pin and the VCC pin.
The recommended bootstrap capacitor value is 100nF to 1uF, and it's recommended to use a ceramic capacitor with a voltage rating of at least 25V. The capacitor should be placed as close as possible to the bootstrap diode and the high-side FET.
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