描述 Description

The FAN3121 and FAN3122 MOSFET drivers are designed to drive

N?channel enhancement MOSFETs in low?side switching

applications by providing high peak current pulses. The drivers are

available with either TTL input thresholds (FAN312xT) or

VDD?proportional CMOS input thresholds (FAN312xC). Internal

circuitry provides an under?voltage lockout function by holding the

output low until the supply voltage is within the operating range.

FAN312x drivers incorporate the MillerDrive architecture for the

final output stage. This bipolar / MOSFET combination provides the

highest peak current during the Miller plateau stage of the MOSFET

turn?on / turn?off process.

The FAN3121 and FAN3122 drivers implement an enable function

on pin 3 (EN), previously unused in the industry?standard pin?out.

The pin is internally pulled up to VDD for active HIGH logic and can

be left open for standard operation.

The commercial FAN3121/22 is available in a 3x3 mm 8?lead

thermally?enhanced MLP package or an 8?lead SOIC package. The

AEC?Q100 automotive?qualified versions are available in the 8?lead

SOIC package.

特性 Features

? Industry?Standard Pin?out with Enable Input

? 4.5?V to 18?V Operating Range

? 11.4 A Peak Sink at VDD = 12 V

? 9.7?A Sink / 7.1?A Source at VOUT = 6 V

? Inverting Configuration (FAN3121) and Non?Inverting

Configuration (FAN3122)

? Internal Resistors Turn Driver Off If No Inputs

? 23?ns / 19?ns Typical Rise/Fall Times (10 nF Load)

? 18 ns to 23 ns Typical Propagation Delay Time

? Choice of TTL or CMOS Input Thresholds

? MillerDrive Technology

? Available in Thermally Enhanced 3x3 mm 8?Lead MLP or 8?Lead

SOIC Package (Pb?Free Finish)

? Rated from –40°C to +125°C

? Automotive Qualified to AEC?Q100 (F085 Versions)

Applications

? Synchronous Rectifier Circuits

? High?Efficiency MOSFET Switching

? Switch?Mode Power Supplies

? DC?to?DC Converters

? Motor Control

? Automotive?Qualified Systems (F085 Versions)