BD90521MUV-CE2

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The BD90521MU-CE2 is a DC-DC switching regulator with a wide input voltage range and high efficiency. It is a low power, high efficiency device that offers feature-rich design options. Its wide operating range and integrated control logic make it a great choice for use in various applications.

Application Field

The BD90521MU-CE2 is ideally suited for use in a wide range of applications. It can be used in the following fields:

• Power supplies for consumer electronics, especially Notebooks and Smartphones.
• Industrial and Commercial Equipment.
• Intelligent lighting systems.
• CATV/Satellite/IPTV.
• Automatic Test Equipment.
• LED lighting.

The device can be used in a variety of applications, including switch-mode power supplies, point of load regulators, high-efficiency voltage boosters, voltage converters, and low noise linear regulators.

Working Principle

The BD90521MU-CE2 is a high-efficiency buck-boost DC-DC switching regulator. It utilizes an optimization algorithm to control the switching frequency and duty cycle to provide a constant and stable output voltage. This type of regulator is known as a forced fixed-frequency synchronization PWM buck-boost regulator.

The device features a synchronous rectifier with low-side MOSFET and a fast-recovery high-side MOSFET for high efficiency and output current capability. The efficiency of a synchronous rectifier is superior to that of a diode rectifier, as it uses a low-on-resistance MOSFET on switching. The power stage of the regulator consists of an inductor, a low-side, and a high-side MOSFET. The low-side MOSFET and the inductor form the buck circuit, while the high-side MOSFET and the inductor form the boost circuit.

The BD90521MU-CE2 also features an integrated driver, which enables an optimal switching frequency and duty cycle. As a result, the regulator is able to offer the maximum efficiency for a given output voltage. The device also provides two switching frequency options: a high-frequency option of 1 MHz and a low-frequency option of 600 kHz. This allows for up to a 5% increase in efficiency.

The BD90521MU-CE2 also has an integrated synchronous rectifier controller that offers faster recovery time when the MOSFET switches over. It also provides a degree of protection to both the inductor and the MOSFET by monitoring the voltage across the inductor. When the voltage exceeds the OVP (over voltage protection) threshold, both the inductor and the MOSFET are protected. The device also includes a current limit feature that prevents overload and short circuit. The BD90521MU-CE2 also includes thermal management features to protect the device from thermal overload and device temperature rise. The device has an integrated temperature monitor and a built-in thermal shutdown function.

In summray, the BD90521MU-CE2 is a highly efficient, feature-rich DC-DC switching regulator designed for use in a wide range of applications. With its wide input voltage range and high efficiency, it is a great choice for accommodating modern electronics and providing reliable, trouble-free operation.

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