FAN3228CMX-F085

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PMIC – Gate Drivers range of applications covers a wide range of electronic connected components, such as power transistors and voltage regulators. The FAN3228CMX-F085 is an intelligent dual MOSFET gate driver from Fairchild Semiconductor. It integrates two MOSFET gate drivers in one integrated circuit (IC). Each gate driver provides efficient driving for power MOSFETs of up to 5 A peak. The FAN3228CMX-F085 is used in a wide range of applications, including gate resistor and dimmer circuits, motor control circuits, general-purpose relay driving, and more.

The FAN3228CMX-F085M is capable of handling two independent MOSFETs with one gate switch. There are two independent drive sections that provide the gate drive current to each MOSFET. The FAN3228CMX-F085 has two operating modes, switching and PWM. In switching mode, the output voltage of the gate driver is turned on or off to indicate the duty cycle of each MOSFET. In PWM mode, the duty cycle of each MOSFET is programmable to allow for various levels of dimming or other control functions.

The FAN3228CMX-F085 is capable of providing up to 5 A (peak) of gate drive current for each MOSFET. It also features adaptive dead time and programmable under voltage lockout to minimize switching loss and EMI. The overvoltage and temperature protection features also enable the FAN3228CMX-F085 to operate safely even in extreme operating conditions.

In terms of working principle, the FAN3228CMX-F085 consists of two independent driver sections. Each section includes a N-channel step-down converter and a level shifter to drive the gate of the MOSFET. The N-channel converter provides the required gate voltage and has a controlled on-time. The level shifter enhances the gate drive voltage and provides the necessary current to drive the MOSFET.

The FAN3228CMX-F085 is capable of controlling two independent MOSFETs with one gate switch. It features an adaptive dead time, where the gate charge and the gate loop are measured to determine the time required for the MOSFET to turn on and off. It also features an under voltage lock-out to prevent destructive turn-on when the input voltage is too low, and an overvoltage protection to ensure that the MOSFET does not turn on when the input voltage is too high.

The FAN3228CMX-F085 is also equipped with a fault flag, which indicates when the device is operating outside its safe operating range. The fault flag is internally tied to the power supply and can be used to set up a warning circuit, which is useful in preventing the MOSFET from operating outside its safe range. In addition, the FAN3228CMX-F085 can be configured to respond to an external current sense signal and can be used to protect itself from over-temperature conditions and over-current fault conditions.

The FAN3228CMX-F085 is ideal for a range of gate drive applications, including motor control and general-purpose relay driving. The overvoltage and temperature protection features, as well as the adaptive dead time, enable the device to operate safely even in a variety of extreme conditions. The fault flag can be used to set up a warning circuit, and the device can be configured to respond to an external current sense signal and can be used to protect itself from both over-temperature and over-current fault conditions.

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