FAN3224TMPX

The FAN3223-25 series dual 4A gate driver provides high peak current pulses at short switching intervals for driving N-channel enhancement mode MOSFETs in low-side switching applications. the driver provides either TTL or CMOS input thresholds. Internal circuitry holds the output low until the supply voltage is within operating range, providing an undervoltage lockout feature. In addition, these drivers have matched internal propagation delays between the A and B channels for applications requiring tightly timed dual gate drivers, such as synchronous rectifiers. This also enables parallel coupling of the two drivers, allowing the current function of driving a MOSFET to be effectively doubled. The FAN322X driver incorporates a MillerDrive structure for the final output stage. This bipolar MOSFET combination provides high current during the Miller flat phase of the MOSFET turn-on/off process, minimizing switching losses while providing rail-to-rail voltage swing and reverse current capability. The FAN3223 provides two inverting drivers and the FAN3224 provides two non-inverting drivers. Each device has dual independent enable pins and defaults to the on state if unconnected. In the FAN3225, each channel has two inputs of opposite polarity, and the second input can be configured as non-inverted or inverted with optional enable. If one or both inputs are left unconnected, the internal resistor biases the inputs so that the output pulls low to keep the power MOSFET in the off state.