The maximum current rating of the DRV8860PWR is 2.5A per phase, but it can be limited by the PCB design, thermal considerations, and other system-level factors.
The sense resistor value depends on the desired current sense accuracy, PCB layout, and system noise considerations. A good starting point is to use the recommended value in the datasheet (e.g., 0.1 ohm), and then adjust based on system-specific requirements.
The internal bootstrap diode is used to generate the high-side gate drive voltage. It eliminates the need for an external bootstrap diode and reduces the overall component count. However, it may affect the design by limiting the maximum voltage rating and requiring careful consideration of the high-side gate drive voltage.
Proper thermal management is crucial for the DRV8860PWR. Ensure good airflow, use a heat sink if necessary, and follow the recommended PCB layout guidelines to minimize thermal resistance. Monitor the device temperature and adjust the design accordingly to prevent overheating.
Follow the recommended PCB layout guidelines in the datasheet, including keeping the high-current paths short and wide, using a solid ground plane, and minimizing the distance between the DRV8860PWR and the sense resistors. Also, ensure proper decoupling and bypassing of the power supply lines.
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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.
