A good PCB layout for the TPS2376D involves placing the device close to the PoE input, using a solid ground plane, and keeping the power traces short and wide. Additionally, it's recommended to place a 10uF capacitor between the VIN and GND pins to filter out noise.
To ensure proper power-up and configuration, make sure to follow the recommended power-up sequence, which involves applying a valid input voltage, then releasing the reset pin, and finally, configuring the device through the I2C interface.
If the internal 1.5kΩ pull-up resistor on the classification pin (CLASS) is not used, an external pull-up resistor is required to ensure proper classification. Failure to do so may result in incorrect classification and potential damage to the device.
To handle inrush current, it's recommended to add an NTC thermistor in series with the input voltage to limit the inrush current. Additionally, a soft-start circuit can be implemented to gradually ramp up the input voltage to prevent excessive inrush current.
The TPS2376D has a thermal pad that must be connected to a solid ground plane to ensure proper heat dissipation. Additionally, a thermal interface material (TIM) can be used to improve heat transfer between the device and the PCB. It's also recommended to keep the device away from other heat sources and ensure good airflow around the device.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
