FAN3121(2012) 데이터 시트보기 (PDF) - Fairchild Semiconductor
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FAN3121 Datasheet PDF : 20 Pages
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February 2012
FAN3121 / FAN3122_F085
Single 9A High-Speed, Low-Side Gate Driver
Features
Qualified to AEC Q-100
4.5 to 18V Operating Range
11.4A Peak Sink at VDD = 12V
9.7A Sink / 7.1A Source at VOUT = 6V
Inverting Configuration (FAN3121) and
Non-Inverting Configuration (FAN3122)
Internal Resistors Turn Driver Off If No Inputs
23ns/19ns Typical Rise/Fall Times with 10nF Load
20ns Typical Propagation Delay Time
Choice of TTL or CMOS Input Thresholds
MillerDrive™ Technology
8-Lead SOIC Package
Rated from –40°C to +125°C
Applications
Synchronous Rectifier Circuits
High-Efficiency MOSFET Switching
Switch-Mode Power Supplies
DC-to-DC Converters
Motor Control
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
(FAN312xT) or CMOS (FAN312xC) input thresholds.
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.
VDD 1
IN 2
EN 3
GND 4
8 VDD
7 OUT
6 OUT
5 GND
Figure 1. FAN3121 Pin Configuration
VDD 1
IN 2
EN 3
GND 4
8 VDD
7 OUT
6 OUT
5 GND
Figure 2. FAN3122 Pin Configuration
© 2012 Fairchild Semiconductor Corporation
FAN3121 / FAN3122_F085 • Rev. 1.0.0
www.fairchildsemi.com
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