BD81870EFV-ME2 Integrated Circuits (ICs)

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BD81870EFV-ME2 application field and working principle

The BD81870EFV-ME2 is the latest high-efficiency swtiching regulator from ROHM Semiconductor. This DC/DC switching regulator features a wide input voltage range that ranges from 2.5V to 5.5V and provides a regulated output from 0.8V to 5.5V. It was specifically designed to provide a high level of engineering for automotive applications, as well as communications, industrial, and consumer applications.

In addition to its wide input range, the BD81870EFV-ME2 also has an adjustable output voltage feature that allows it to be configured to any value within its output range. This allows the design engineer to fine-tune the system and gain further efficiency improvements. With the adjustable output voltage feature, designers can also quickly respond to changing system requirements, such as load transients, without the need to make modifications to the board.

The BD81870EFV-ME2 is equipped with a variety of protection features that protect the device from a variety of harmful conditions. These include output over-voltage protection, output over-current protection, short-circuit protection, over-temperature protection, under-voltage lockout, and even thermal shutdown prevention. The protection features provide a high level of reliability and ensure long-term system performance.

The BD81870EFV-ME2 also features ROHM Semiconductor\'s proprietary switching technology called Mastercore. This advanced design platform provides a high level of noise suppression, improved efficiency, and extremely low, stable output voltage levels. Mastercore is also designed to ensure long-term reliability, even when used in a wide variety of environments.

When compared to linear voltage regulators, the BD81870EFV-ME2 provides greater efficiency, smaller size, and lower cost. It can also be used in automotive applications that are subject to severe vibration and shock, as well as in extremely hot or cold temperatures. The BD81870EFV-ME2 is a versatile yet powerful DC/DC swtiching regulator that is well-suited for applications in a wide variety of industries.

BD81870EFV-ME2 Working Principle

The working principle of the BD81870EFV-ME2 is based on a buck converter topology. A buck converter is a type of switchingregulator thatreduces an input voltage to a much lower output voltage and supplies it to the load. It is an efficient, cost-effective and simple solution for applications requiring a regulated voltage level.

The BD81870EFV-ME2 is equipped with a PWM controller and a multiphase MOSFET driver that regulate the output voltage. The PWM controller compares the voltage between the non-inverting input and the reference voltage input, controlling the switching frequency and the duty cycle of the output voltage. The MOSFET driver controls the serial MOSFETs to perform the switching process.

The input voltage first passes through an input filter capacitor before reaching the PWM controller. This prevents high-frequency switching noise from entering the load and disrupting other circuits connected to the input voltage. After the voltage is regulated, a feedback circuit senses the output voltage and compares it to the voltage reference.

If any discrepancy is present, the PWM controller adjusts the duty cycle of the output accordingly so that the correct voltage is achieved. This process is performed continuously, resulting in a regulated output voltage. The switching frequency of the PWM controller is adjustable to allow for custom requirements.

Conclusion

The BD81870EFV-ME2 is an optimized DC/DC switching regulator that provides superior performance over linear voltage regulators. It offers a wide input voltage range, adjustable output voltage, and a variety of protection features. With its high efficiency and its Mastercore switching technology, the BD81870EFV-ME2 is well-suited for a wide variety of automotive, communication, industrial, and consumer applications.

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