FAN7317M

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FAN7317M Application Field and Working Principle

FAN7317M is a 3A peak current Pulse Width Modulator (PWM) that drives two external MOSFETs or two external NPN transistors in a two-phase buck regulator. The FAN7317M can be used to control the output voltage of a two-phase buck regulator.

The working principle of the FAN7317M is simple. It uses a voltage control input to control the output voltage of the buck converter. Each phase of the buck converter is controlled by a pair of high side and low side MOSFETs. The FAN7317M provides an interface between the voltage control input and the gate drive signals of the MOSFETs.

The FAN7317M is designed for a wide range of applications, such as the design of high-performance 5V to 12V DC/DC buck converters, which can provide a regulated voltage at a high efficiency. It can also be used in battery chargers and other power converters, where a regulated output voltage is required.

The FAN7317M has several features that make it suitable for many applications. It has two integrated slope-compensated Current-Mode (CM) PWM controllers, which guarantee a stable operating frequency regardless of the input voltage or output current. It also features over-voltage protection, under-voltage protection, over-current protection, and an adjustable soft-start feature.

The FAN7317M has three operating modes. In Sleep Mode, the FAN7317M shuts down both PWM outputs and shuts down the oscillator to minimize current consumption. In Power On Reset (POR) mode, the device is reset and re-calibrated, and the PWM outputs are enabled. In Shutdown Mode, the device is shut down, the oscillator is stopped, and all device functions are disabled.

The FAN7317M is a cost-effective and high-performance solution for designing a two-phase buck regulator. It is easy to use and its features make it suitable for a wide range of applications.

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