Infineon recommends a 2-layer PCB with a thermal via array underneath the IC to dissipate heat efficiently. A minimum of 10 thermal vias with a diameter of 0.3 mm to 0.5 mm is recommended.
The input capacitor should be selected based on the input voltage ripple, output current, and operating frequency. A minimum capacitance of 10 μF with a voltage rating of 25 V or higher is recommended.
The maximum allowed voltage drop across the sense resistor is 100 mV. Exceeding this value may affect the accuracy of the current sensing.
Yes, the TLE9221SX is rated for operation up to 150°C. However, the device's performance and reliability may degrade at high temperatures. Ensure proper thermal management and derate the device's specifications accordingly.
Check the input voltage, output voltage, and current sensing resistors for correct connections and values. Verify the PCB layout and thermal design. Use an oscilloscope to check the switching node and output voltage waveforms for anomalies.
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