FAN3224 データシートの表示（PDF） - Fairchild Semiconductor

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FAN3224

Dual 4-A High-Speed, Low-Side Gate Drivers

Fairchild Semiconductor 

April 2014

FAN3223 / FAN3224 / FAN3225

Dual 4-A High-Speed, Low-Side Gate Drivers

Features

 Industry-Standard Pinouts

 4.5-V to 18-V Operating Range

 5-A Peak Sink/Source at VDD = 12 V

 4.3-A Sink / 2.8-A Source at VOUT = 6 V

 Choice of TTL or CMOS Input Thresholds

 Three Versions of Dual Independent Drivers:

- Dual Inverting + Enable (FAN3223)

- Dual Non-Inverting + Enable (FAN3224)

- Dual-Inputs (FAN3225)

 Internal Resistors Turn Driver Off If No Inputs

 MillerDrive™ Technology

 12-ns / 9-ns Typical Rise/Fall Times (2.2-nF Load)

 Under 20-ns Typical Propagation Delay Matched

within 1 ns to the Other Channel

 Double Current Capability by Paralleling Channels

 8-Lead 3x3 mm MLP or 8-Lead SOIC Package

 Rated from –40°C to +125°C Ambient

 Automotive Qualified to AEC-Q100 (F085 Version)

Applications

 Switch-Mode Power Supplies

 High-Efficiency MOSFET Switching

 Synchronous Rectifier Circuits

 DC-to-DC Converters

 Motor Control

 Automotive-Qualified Systems (F085 version)

Description

The FAN3223-25 family of dual 4 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 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 rail-

to-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.

Related Resources

AN-6069 — Application Review and Comparative

Evaluation of Low-Side Gate Drivers

FAN3223

© 2007 Fairchild Semiconductor Corporation

FAN3223 / FAN3224 / FAN3225 • Rev. 1.1.4

FAN3224

Figure 1. Pin Configurations

FAN3225

www.fairchildsemi.com

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