FAN3223CMX Integrated Circuits (ICs)

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As one of the PMIC - Gate Drivers, FAN3223CMX has many applications and features various working principles. This article will discuss the application field and working principle of FAN3223CMX.

Applications

According to the official datasheet, FAN3223CMX is a single 2-phase synchronous buck REV.A, minimum 5-pin driver for SMPS, server and low-profile exterior voltage regulation modules. Its core function is to provide the drive to external power MOSFETs in synchronous buck converter applications. It makes it possible to drive a N-MOSFET and a P-MOSFET pair for each phase with differential signals.

FAN3223CMX also offer several advantages over discrete MOSFET drivers. Its low output impedance provides an efficient drive voltage to the external devices. It provides a large damping shunt resistor to improve the transient response time and eliminates the need for additional series gate resistors. On the other hand, FAN3223CMX features adjustable OVLO and UVLO, which provides good shutdown response and protection in the event of a fault.

Working Principle

The FAN3223CMX is internally configured with two high-side gate drivers and one low-side gate driver. It also contains logic level translation, input signal conditioning, output overvoltage and undervoltage protection, and current limit protections.

The two high-side gate drivers provide drive to the two PMOS devices in the synchronous buck converter circuit. It will drive the gates of the high-side power MOSFET at switches on and off. This can be done with the help of dedicated logic level signals.

The low-side gate driver acts as an input signal booster, which sends a signal to the source contact of the N-MOSFET. It passes the input signal to the source contact without inversion. The current limit feature in the FAN3223CMX can provide fast response and protection against overload conduction.

The logic level translation feature allows FAN3223CMX to accept different level inputs and output appropriate levels. This allows for a wide range of compatibility to different types of PMOS MOSFET modules. The output overvoltage and undervoltage protection feature is also crucial for preventing any potential device damage due to input voltage fluctuations.

Conclusion

This article discussed the application field and working principle of FAN3223CMX, one of the PMIC - Gate Drivers. It is a low-profile voltage regulator that provides an efficient drive voltage and adjustable OVLO and UVLO protections. It also features two high-side gate drivers, a low-side gate driver, logic level translation, and current limit protection features. Furthermore, it has wide compatibility with different types of PMOS MOSFET modules.

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