Texas Instruments provides a recommended PCB layout in the DRV401A datasheet, which includes guidelines for component placement, trace routing, and thermal management. It's essential to follow these guidelines to ensure proper operation and minimize electromagnetic interference (EMI).
The sense resistor value depends on the motor current and the desired current sense accuracy. Texas Instruments provides a formula to calculate the sense resistor value in the DRV401A datasheet. Additionally, the DRV401A evaluation module user's guide provides a detailed example of sense resistor selection.
The internal bootstrap diode is used to generate the gate drive voltage for the high-side FET. It's essential to ensure that the bootstrap capacitor is properly sized and placed to minimize voltage droop and ensure reliable operation. The DRV401A datasheet provides guidelines for bootstrap capacitor selection and placement.
The DRV401AIRGWRG4 has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor divider network. The resistor values can be calculated using the formula provided in the DRV401A datasheet. Additionally, the device has a programmable overcurrent threshold, which can be set using the OCP pin.
The DRV401AIRGWRG4 has a high power dissipation rating, and proper thermal management is crucial to ensure reliable operation. Texas Instruments recommends using a heat sink, thermal interface material, and a PCB design that allows for good airflow and heat dissipation. The DRV401A datasheet provides thermal management guidelines and a thermal model for simulation.
DRV401AIRGWRG4 datasheet
by Texas Instruments
