BD9673EFJ-E2

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The BD9673EFJ-E2 is one of the power management integrated circuits (PMIC) from ROHM Semiconductor. It is part of the DC-DC switching voltage regulators family and its main application field is the power supply of Smart Automotive Systems.

The BD9673EFJ-E2 series is a unique solution for automotive power management applications. It allows for both low-side and high-side gate drive control, enabling highly efficient low-noise power supply design with only one PMIC. In addition to its built-in regulator functionality, the integrated current sensing and diagnostic functions provide high efficiency and reliability such as on-chip MOSFET bias current detection and short-circuit protection.

The BD9673EFJ-E2 power supply is a DC-DC buck switching regulator that provides all of the necessary components and features for a complete power supply solution. It is designed to be easily configured with external components and offers a wide operating range and an adjustable switching frequency. It is capable of providing an output voltage range of up to 5V and can supply up to 8A. The regulator also features a minimum on-time control, a soft-start voltage regulation mode, and a built-in thermal protection function for improved system reliability.

The operation of the BD9673EFJ-E2 revolves around the principle of power switching. It starts when the basevoltage is applied, after which the diode D1 is forward biased and the current begins to flow from the power supply towards the load. The voltage drop across D1 causes the PMOS FET to turn on, switching the power to the load. The current in the inductor increases until the voltage across the inductor is equal to the supply voltage, at which point the PMOS FET turns off. The inductor and diode D1 form the main power path, while the resistor R1 provides overcurrent and short-circuit protection.

The BD9673EFJ-E2 has several features that make it well-suited for automotive applications. It operates with a very low ripple current, making it stable and efficient. It also has built-in current sensing and diagnostic functions, providing superior protection against overcurrent and short circuits. Finally, the wide operating temperature range allows the device to work in harsh environments.

Overall, the BD9673EFJ-E2 is an excellent choice for automotive power management applications. With its low ripple current, built-in current sensing and diagnostic functions, and wide operating temperature range, it provides a stable, reliable and robust power supply solution.

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