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The Diodes Incorporated AP74701Q is an ideal diode controller intended for automotive applications, where efficient reverse current protection and reliable power path management are required. Instead of using a traditional diode, the device drives an external N-channel MOSFET to act as the switching element. This approach reduces conduction losses by replacing the fixed voltage drop of a diode with the low Rds(on) of the MOSFET, improving overall system efficiency and thermal performance in automotive power networks.
The device supports an input voltage range up to 80 V, allowing operation in both 12 V and 24 V automotive architectures. It incorporates fast-acting circuitry that prevents reverse current flow during voltage transients or when multiple power sources are connected. An internal charge pump provides the necessary gate drive to fully enhance the external MOSFET, ensuring low-loss operation even at higher load currents. Built-in functions such as overvoltage protection, undervoltage lockout, and thermal shutdown contribute to stable and safe performance under harsh operating conditions.
The AP74701Q is AEC-Q100 qualified, meeting established standards for automotive reliability. Engineers can select the external MOSFET to match current and thermal requirements, offering flexibility to adapt the design to different systems without changing the controller itself. This separation of control and switching elements makes it suitable for scalable designs across a range of vehicle platforms.
Typical applications include automotive power distribution, redundant supply systems, infotainment, battery management, and ADAS electronics. In these systems, the AP74701Q provides a way to manage bidirectional power paths while preventing backfeed and minimizing heat generation. Its combination of high-voltage capability, protection features, and support for external MOSFETs makes it a practical building block for engineers working on efficient and reliable automotive power electronics. To learn more, visit Mouser.com.
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