Description

The FAN3226−29 family of dual 2 A 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 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

rail−to−rail voltage swing and reverse current capability.

The FAN3226 offers two inverting drivers and the FAN3227 offers

two non−inverting drivers. Each device has dual independent enable

pins that default to ON if not connected. In the FAN3228 and

FAN3229, 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.

Features

 Industry−Standard Pinouts

 4.5−V to 18−V Operating Range

 3−A Peak Sink/Source at VDD = 12 V

 2.4 A−Sink/1.6−A Source at VOUT = 6 V

 Choice of TTL or CMOS Input Thresholds

 Four Versions of Dual Independent Drivers:

 Dual Inverting + Enable (FAN3226)

 Dual Non−Inverting + Enable (FAN3227)

 Dual Inputs in Two Pin−Out Configurations:

− Compatible with FAN3225x (FAN3228)

− Compatible with TPS2814D (FAN3229)

 Internal Resistors Turn Driver Off If No Inputs

 MillerDrive Technology

 12−ns/9−ns Typical Rise/Fall Times (1−nF Load)

 Under 20−ns Typical Propagation Delay Matched within 1 ns to

the Other Channel

 Double Current Capability by Paralleling Channels

Features (Continued)

 8−Lead SOIC Package

 Rated from –40C to +125C Ambient

 AEC−Q100 Qualified and PPAP Capable

 These are Pb−Free Devices

Applications

 Switch−Mode Power Supplies

 High−Efficiency MOSFET Switching

 Synchronous Rectifier Circuits

 DC−to−DC Converters

 Motor Control

 Servers

 Automotive−Qualified Systems