FAN8100N

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The FAN8100N is a highly integrated and advanced flexible current-mode controller with a built-in sense MOSFET for a single-phase synchronous buck converter application. It belongs to a category of Power Management ICs called Motor Drivers, Controllers. This particular controller has excellent perfromance and high system efficiency, allowing it to power systems with ease.

The FAN8100N makes use of current-mode control instead of voltage-mode control to manage power, allowing it to be more efficient in terms of power usage and thermal management while providing better current stabilization. It also offers a wide range of operating frequencies from 2kHz to 500kHz, along with adjustable current sense differential voltage and voltage feedback. These characteristics make the FAN8100N suitable for applications such as DC/DC buck converters and other DC/DC power conversion systems. It has a built-in soft-start, allowing the user to increase system voltage slowly on start-up instead of ramping it up instantly.

The FAN8100N utilizes a sense MOSFET to read the output current requiring only a small external inductor, significantly reducing the size and cost required to power the system. Furthermore, the input voltage can range from 4.5V to 38V and the maximum output current can reach up to 3A. This makes the FAN8100N ideal for system applications where high efficiency is required, such as LED driver, hand-held device, portable TV and PC peripherals.

In order to get the most out of the FAN8100N, it is important to understand its working principle. The FAN8100N controller operates in a current mode, in which the current regulated is based on the sense MOSFET sensing the actual output current. This current sensing is then compared with a reference voltage and sent to the controller, which then adjusts the duty cycle accordingly.

The controller then utilizes a patented pulse frequency modulation technique to adjust the duty cycle, which generates a higher voltage, causing the mosfet to “switch” on and off at a higher frequency. This technique provides better control over the output voltage, while still being able to generate a wide range of duty cycles. This, in turn, provides excellent noise immunization and system efficiency, allowing the FAN8100N to be useful in many applications requiring power requirements.

Overall, the FAN8100N is suitable for a wide range of applications needing efficient and reliable current-mode control, such as DC/DC buck converters, LED driver and hand-held device. It offers a wide operating frequency range while utilizing a small external inductor, and is designed to provide reliable performance and high system efficiency.

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