FAN3223 / FAN3224 / FAN3225 — Dual 4A High-Speed, Low-Side Gate Drivers
May 2008
FAN3223 / FAN3224 / FAN3225 Dual 4A H...
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 MillerDrive™ architecture for the final output stage. This bipolar
MOSFET combination 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 FAN322...