BD9889FV-E2

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PMIC stands for Power Management Integrated Circuit, which is a type of integrated circuit that specialises in managing power within a device, such as a portable device or embedded system. The BD9889FV-E2 PMIC is a high-efficiency step-down DC/DC converter. It is a system-in-package (SiP) device that integrates a microcontroller with a power pre-converter and various peripheral components. It is designed for high current and/or radiation-hardened applications.

BD9889FV-E2 PMIC is especially suitable for applications in space environment, given its wide range of usage, robustness against temperature and radiation, and high efficiency. Examples include battery-powered spacecraft, satellites, and other space vehicles.

Working Principle

The BD9889FV-E2 PMIC has a power pre-converter, which is the core working principle of the device. The pre-converter is a synchronous DC-DC buck converter designed for high-current and high-temperature operation. It uses two switches for step-down conversion of a DC input voltage to a lower, regulated output voltage. The BD9889FV-E2 also has two field-effect transistors (FETs) and two MOSFETs (Metal Oxide Semiconductor Field-Effect Transistors) that are used for power management and signal conditioning. These FETs and MOSFETs help to ensure a smoother voltage transition and reduce switching losses, resulting in excellent power conversion efficiency.

The BD9889FV-E2 PMIC also includes an integrated microcontroller, which is responsible for the autonomous operation of the device, including current sensing, voltage sensing, power management, peripheral functions, and status monitoring. The microcontroller can communicate with external devices through I2C (Inter-Integrated Circuit), SPI (Serial Peripheral Interface), and/or UART (Universal Asynchronous Receiver/Transmitter) protocols.

Benefits

The BD9889FV-E2 PMIC is an extremely efficient power converter, and is ideal for applications in extreme environments. It is designed for high-current operation, with a maximum current of 4.5 A. The device also has a low noise operation, with a minimum switching frequency of 120 kHz. It is also designed for use in harsh environments, with a maximum operating temperature of 176 °F (80 °C) and radiation tolerance up to 100 krad (Si).

The BD9889FV-E2 PMIC also has an integrated microcontroller that offers significant system savings, including lower component count, reduced board space and cost, and reduced system integration time. The integrated microcontroller also has a number of features that simplify the design process, including current sensing, voltage sensing, power management, peripheral functions, and status monitoring.

Conclusion

The BD9889FV-E2 PMIC is a high-efficiency, space-grade power management integrated circuit that is ideal for power conversion applications in extreme environments. Its high efficiency, robustness, and wide operating temperature range make it suitable for use in satellites, spacecraft, and other space vehicles. The integrated microcontroller also provides significant system savings, including lower component count, reduced board space and cost, and reduced system integration time. With its high efficiency and power management capabilities, the BD9889FV-E2 PMIC is an excellent choice for demanding applications.

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