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FAN3226T Datasheet(PDF) 1 Page - Fairchild Semiconductor

No. de pieza FAN3226T
Descripción Electrónicos  2A Low-Voltage PMOS-NMOS Bridge Driver
Download  16 Pages
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN3226T Datasheet(HTML) 1 Page - Fairchild Semiconductor

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January 2011
© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN3268 • Rev. 1.0.1
1
FAN3268
2A Low-Voltage PMOS-NMOS Bridge Driver
Features
4.5V to 18V Operating Range
Drives High-Side PMOS and Low-Side NMOS in
Motor Control or Buck Step-down Applications
Inverting Channel B Biases High-Side PMOS
Device Off (with internal 100kΩ Resistor) when
VDD is below UVLO Threshold
TTL Input Thresholds
2.4A Sink / 1.6A Source at V
OUT=6V
Internal Resistors Turn Driver Off If No Inputs
MillerDrive™ Technology
8-Lead SOIC Package
Rated from –40°C to +125°C Ambient
Applications
Motor Control with PMOS / NMOS Half-Bridge
Configuration
Buck Converters with High-Side PMOS Device;
100% Duty Cycle Operation Possible
Logic-Controlled Load Circuits with High-Side
PMOS Switch
Description
The FAN3268 dual 2A gate driver is optimized to drive a
high-side P-channel MOSFET and a low-side N-channel
MOSFET in motor control applications operating from a
voltage rail up to 18V. The driver has TTL input
thresholds and provides buffer and level translation
functions from logic inputs. Internal circuitry provides an
under-voltage lockout function that prevents the output
switching devices from operating if the VDD supply
voltage is below the operating level. Internal 100kΩ
resistors bias the non-inverting output low and the
inverting output to VDD to keep the external MOSFETs
off during startup intervals when logic control signals
may not be present.
The
FAN3268
driver
incorporates
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 FAN3268 has two independent enable pins that
default to on if not connected. If the enable pin for non-
inverting channel A is pulled low, OUTA is forced low; if
the enable pin for inverting channel B is pulled low,
OUTB is forced high. If an input is left unconnected,
internal resistors bias the inputs such that the external
MOSFETs are off.
Figure 1. Typical Motor Drive Application


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