FAN3225 Datasheet | Fairchild Semiconductor

FAN3223 / FAN3224 / FAN3225 - Dual 4A High-Speed, Low-Side Gate Drivers May 2008 FAN3223 / FAN3224 / FAN3225 Dual 4A High-Speed, Low-Side Gate Drivers Features - - - - - - Industry-Standard Pinouts 4.5 to 18V Operating Range 5A Peak Sink/Source at VDD = 12V 4.3A Sink / 2.8A Source at VOUT = 6V Choice of TTL or CMOS Input Thresholds Three Versions of Dual Independent Drivers: Description The FAN3223-25 family of dual 4A gate drivers is designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications by providing high peak current pulses during the short switching intervals. The driver is available with either TTL or CMOS input thresholds. Internal circuitry provides an under-voltage lockout function by holding the output LOW until the supply voltage is within the operating range. In addition, the drivers feature matched internal propagation delays between A and B channels for applications requiring dual gate drives with critical timing, such as synchronous rectifiers. This also enables connecting two drivers in parallel to effectively double the current capability driving a single MOSFET. The FAN322X drivers incorporate Miller Drive™ architecture for the final output stage. This bipolar MOSFET bination provides high current during the Miller plateau stage of the MOSFET turn-on / turn-off process to minimize switching loss, while providing railto-rail voltage swing and reverse current capability. The FAN3223 offers two inverting drivers and the FAN3224 offers two non-inverting drivers. Each device has dual independent enable pins that default to ON if not connected. In the FAN3225, each channel has dual inputs of opposite polarity, which allows configuration as non-inverting or inverting with an optional enable function using the second input. If one or both inputs are left unconnected, internal resistors bias the inputs such that the output is pulled LOW to hold the power MOSFET OFF. - - - - - - - Dual Inverting + Enable (FAN3223) Dual...