FAN3225CMX Integrated Circuits (ICs)

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PMIC - Gate Drivers is a family of electronic devices and components used to drive electrical gates. These drivers are mainly used in industrial, automotive and consumer electronics. FAN3225CMX is a member of this family, which is a 5.6V to 32V mono-channel non-inverting MOSFET gate driver that has current limit and thermal protection. In this article, we will discuss the application field and working principle of FAN3225CMX.

Application Field

FAN3225CMX is suitable for a wide range of applications, such as DC/DC converters, motor drivers, PFCs, and automotive systems. It is also suitable as a driver for power MOSFETs and IGBTs. The FAN3225CMX has all the necessary safety features to ensure reliable operation in various industries and automotive applications. It has an operating temperature range from - 40 C to + 85 C in all stresses. It also has an Over-Current Limit (OCL) circuit, which limits the gate current to 1.5 A. Furthermore, the device is protected against thermal overload and overvoltage with Fault, thermal shutdown, and over-voltage protection functions.

FAN3225CMX integrates a High-Side MOSFET to generate bootstrap power. This extends the VDD range of this device, which can be as low as 5.6V. This feature makes FAN3225CMX ideal for automotive applications requiring a wide supply voltage range. Furthermore, the FAN3225CMX features an Output Enable (DIS) and a Standby (EN) pin which both provide a fast turn-on and turn-off of the driver. The Standby (EN) pin can also be used to reduce overall power consumption when the driver is not in use.

Working Principle

The FAN3225CMX is a single channel, non-inverting MOSFET gate driver that can drive both high side and low side MOSFETs. The device has a single 5V input power supply and can drive MOSFETs up to a maximum voltage of 32V. It has a switch mode architecture, which means that it operates using pulse width modulation (PWM). It is designed to be used in a push-pull or half bridge configuration, and it can operate at up to 10kHz switch frequency.

The FAN3225CMX utilizes two high-side and low-side complementary MOSFETs that are connected in series. When the input voltage is applied to the driver, the high-side MOSFET conducts and the low-side MOSFET is cut off. This causes the gate source voltage difference to be equal to the input voltage, resulting in an on state of the MOSFET. When the input voltage is pulled low, the low-side MOSFET conducts and the high-side MOSFET is cut off. This causes the gate source voltage difference to be equal to ground, resulting in an off state of the MOSFET.

The FAN3225CMX also features an Over-Current Limit (OCL) circuit, which limits the gate current to 1.5A. Together with the Fault, thermal shutdown, and over-voltage protection functions, the FAN3225CMX is a reliable solution for many applications.

Conclusion

FAN3225CMX is a mono-channel non-inverting MOSFET gate driver from the PMIC – Gate Driver family. It is suitable for DC/DC converters, motor drivers, PFCs, and automotive systems, as well as for powering MOSFETs and IGBTs. It provides a wide voltage range and has all the necessary safety features to ensure reliable operation. The driver works using a switch mode architecture and can operate at up to 10kHz switch frequency. Furthermore, the device is protected against thermal overload and overvoltage with Fault, thermal shutdown, and over-voltage protection functions.

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