FAN3278TMX datasheet, PDF - EEWORLD Datasheet

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FAN3278TMX: DescriptionHALF BRDG BASED MOSFET DRIVER, PDSO8; Categorysemiconductor Analog mixed-signal IC; File Size483KB，16 Pages; ManufacturerFairchild; Websitehttp://www.fairchildsemi.com/

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FAN3278TMX Overview

HALF BRDG BASED MOSFET DRIVER, PDSO8

FAN3278TMX Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 Cel
Minimum operating temperature	-40 Cel
On time	0.0700 us
Off time	0.0600 us
Processing package description	MS-012, SOIC-8
Lead-free	Yes
EU RoHS regulations	Yes
state	ACTIVE
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	1.27 mm
terminal coating	MATTE TIN
Terminal location	DUAL
Packaging Materials	PLASTIC/EPOXY
Temperature level	AUTOMOTIVE
high end driver	Yes
Interface Type	HALF BRDG BASED MOSFET DRIVER

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FAN3278 — 30V PMOS-NMOS Bridge Driver

January 2011

FAN3278

30V PMOS-NMOS Bridge Driver

Features



8V to 27V Optimum Operating Range

Drives High-Side PMOS and Low-Side NMOS in

Motor Control or Buck Step-Down Applications

Output Drive-Voltage Magnitude Limited: < 13V

for V

up to 30V

Biases Each Load Device OFF with a 100kΩ

Resistor when V

Below Operating Level

Low-Voltage TTL Input Thresholds

Peak Gate Drives at 12V: +1.5A Sink, -1.0A Source

Internal Resistors Hold Driver Off When

No Inputs Present

8-Lead SOIC Package

Rated from –40°C to +125°C Ambient

Description

The FAN3278 dual 1.5A 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 27V. Internal circuitry

limits the voltage applied to the gates of the external

MOSFETs to 13V maximum. The driver has TTL input

thresholds and provides buffer and level translation from

logic inputs. Internal circuitry prevents the output

switching devices from operating if the V

supply

voltage is below the IC operation level. Internal 100kΩ

resistors bias the non-inverting output LOW and the

inverting output to V

to keep the external MOSFETs

off during startup intervals when logic control signals

may not be present.

The FAN3278 driver incorporates MOSFET devices for

the final output stage, providing high current throughout

the MOSFET turn-on / turn-off transition to minimize

switching loss. The internal gate-drive regulators

provide optimum gate-drive voltage when operating

from a rail of 8V to 27V. The FAN3278 can be driven

from a voltage rail of less than 8V; however, its gate

drive current is reduced.

The FAN3278 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.

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

Figure 1. Typical Application

FAN3278 • Rev. 1.0.0

www.fairchildsemi.com

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