Data Handbook for Fairchild FAN3223 to FAN3225

3223 / F 24 / F 3225 — al 4A ig -S eed , L -S id e G ate D rivers

July 2012

FAN3223 / FAN3224 / FAN3225 Dual 4A High-Speed, Low-Side Gate Drivers

Features

Description

 Industry-Standard Pinouts

The FAN3223-25 family of dual 4A gate drivers is

 4.5 to 18V Operating Range

designed to drive N-channel enhancement-mode  5A Peak Sink/Source at VDD = 12V MOSFETs in low-side switching applications by providing high peak current pulses during the short

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

switching intervals. The driver is available with either

 Choice of TTL or CMOS Input Thresholds TTL or CMOS input thresholds. Internal circuitry

provides an under-voltage lockout function by holding

 Three Versions of Dual Independent Drivers:

the output LOW until the supply voltage is within the

- Dual Inverting + Enable (FAN3223)

operating range. In addition, the drivers feature matched - Dual Non-Inverting + Enable (FAN3224) internal propagation delays between A and B channels for applications requiring dual gate drives with critical

- Dual-Inputs (FAN3225)

timing, such as synchronous rectifiers. This also

 Internal Resistors Turn Driver Off If No Inputs enables connecting two drivers in parallel to effectively

 Miller Drive™ Technology double the current capability driving a single MOSFET.  12ns / 9ns Typical Rise/Fall Times with 2.2n F Load The FAN322X drivers incorporate Miller Drive™ architecture for the final output stage. This bipolar-

 Typical Propagation Delay Under 20ns Matched

MOSFET combination provides high current during the

within 1ns to the Other Channel

Miller plateau stage of the MOSFET turn-on / turn-off

 Double Current Capability by Paralleling Channels process to minimize switching loss, while providing rail-

to-rail voltage swing and reverse current capability.

 8-Lead 3x3mm MLP or 8-Lead SOIC Package

 Rated from –40°C to +125°C Ambient 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

Applications

not connected. In the FAN3225, each channel has dual  Switch-Mode Power Supplies inputs of opposite polarity, which allows configuration as non-inverting or inverting with an optional enable

 High-Efficiency MOSFET Switching

function using the second input. If one or both inputs are  Synchronous Rectifier Circuits left unconnected, internal resistors bias the inputs such that the output is pulled LOW to hold the power

 DC-to-DC Converters

MOSFET OFF.

 Motor Control

Related Resources AN-6069 — Application Review and Comparative Evaluation of Low-Side Gate Drivers

FAN3223 FAN3224 FAN3225

Figure 1. Pin Configurations

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN3223 / FAN3224 / FAN3225 • Rev. 1.0.9