Texas Instruments provides a recommended layout and placement guide in the datasheet, but it's essential to note that the device requires a careful layout to minimize noise and ensure proper operation. A good practice is to keep the high-frequency components (e.g., inductors, capacitors) close to the IC, and use a solid ground plane to reduce EMI.
The selection of the inductor depends on the specific application requirements, such as output voltage, current, and switching frequency. Texas Instruments provides a list of recommended inductors in the datasheet, but it's crucial to consider factors like inductor core material, size, and saturation current. A good starting point is to use the inductor selection guide provided by TI or consult with an inductor manufacturer.
The BQ24751RHDR has a maximum input voltage rating of 28V, but it's essential to note that the device can tolerate input voltage transients up to 30V for a short duration (less than 100ms). However, operating the device at or near the maximum rating for an extended period may reduce its reliability and lifespan.
The BQ24751RHDR has a built-in OVP feature that can be enabled by connecting the OVP pin to a voltage divider network. The OVP threshold is set by the voltage divider ratio, and the device will shut down if the input voltage exceeds the set threshold. It's essential to carefully design the OVP circuit to ensure accurate and reliable operation.
The EN (enable) pin is used to enable or disable the BQ24751RHDR. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. The EN pin can be used to implement power sequencing, shutdown, or low-power modes in the system. It's essential to ensure that the EN pin is properly driven and decoupled to prevent unwanted device operation.
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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.
