The maximum junction temperature (Tj) of the AUIRF4905S is 175°C. However, it's recommended to keep the junction temperature below 150°C for reliable operation and to prevent thermal runaway.
The maximum current rating of the AUIRF4905S depends on the package and the thermal conditions. The datasheet provides a current rating of 49A at a case temperature of 25°C. To calculate the maximum current rating at a higher temperature, you can use the derating curve provided in the datasheet.
The recommended gate drive voltage for the AUIRF4905S is between 10V and 15V. A higher gate drive voltage can improve the switching performance, but it may also increase the power consumption and EMI.
Yes, the AUIRF4905S can be used in a synchronous buck converter. However, it's essential to ensure that the device is properly driven and that the dead time is minimized to prevent shoot-through currents.
To prevent parasitic inductance in the PCB layout, it's recommended to use a compact layout, minimize the length of the traces, and use a ground plane to reduce the inductance. Additionally, using a Kelvin connection for the source pin can help to reduce the parasitic inductance.
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