FAN6520BM

FAN6520BM is a high efficiency, all-around and adaptable DC/DC step down switching controller. It includes various features, such as adaptive voltage positioning, automatic pulse-by-pulse current limiting, overcurrent protection and short circuit protection, which make it suitable for a wide range of applications.

Application Field

FAN6520BM can be used in many applications to regulate, rectify, and control the power flow. It can be used for automotive powertrain control, driver assistant systems, ergonomic computer systems, industrial control systems, medical equipment, and telecommunication systems. The controller can be used as a synchronous buck converter, a non-synchronous buck converter, and a synchronous buck-boost converter.

Working Principle

The FAN6520BM switch controller contains a constant frequency PWM controller, an internal power MOSFET and some other circuits. It is built around a flexible architecture and can operate in both synchronous and non-synchronous buck and synchronous buck-boost operation. The internal PWM controller produces a stable and adjustable switching frequency that can be trimmed from 200kHz to 550kHz. The PWM control also provides a simple circuit for adaptive voltage positioning, as well as pulse-by-pulse current limiting, overcurrent protection and short circuit protection.

The primary side of the FAN6520BM switch controller can be connected to a high-side MOSFET and a synchronous MOSFET, or to a single high-side MOSFET. The gate driver of the FAN6520BM switch controller can source up to 3A of source current, while sink (on the high side) up to 2.5A of sink current. This provides a low resistive path for charging and discharging the gate of the connected MOSFETs.

The FAN6520BM switch controller offers an adjustable output voltage between 0.75V and 3V, with a maximum output current of 12A. The operating temperature range is from -40°C to 125°C, and the quiescent current is typically 100μA.

Conclusion

FAN6520BM is a high efficiency, all-around, and adaptable DC/DC step down switching controller with many impressive features. It is suitable for a wide range of applications, from automotive to medical and more. It can be used as a synchronous buck converter, a non-synchronous buck converter, or a synchronous buck-boost converter. The controller runs at an adjustable frequency between 200kHz to 550kHz, and offers an adjustable output voltage of 0.75V-3V with a maximum output current of 12A.