Datasheet > FAN3278TMX

FAN3278TMX

更新时间： 2024-01-12 14:47:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		驱动器
页数	文件大小	规格书
15页	458K
描述
30V PMOS-NMOS Bridge Driver

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FAN3278TMX 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.84
Base Number Matches：	1

FAN3278TMX 数据手册

January 2011

FAN3278

30V PMOS-NMOS Bridge Driver

Description

Features

The FAN3278 dual 1.5A gate driver is optimized to drive

8V to 27V Optimum Operating Range

high-side P-channel MOSFET and a low-side

Drives High-Side PMOS and Low-Side NMOS in

Motor Control or Buck Step-Down Applications

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_DDsupply

voltage is below the IC operation level. Internal 100kΩ

resistors bias the non-inverting output LOW and the

inverting output to V_DDto keep the external MOSFETs

off during startup intervals when logic control signals

may not be present.

Output Drive-Voltage Magnitude Limited: < 13V

for V_DDup to 30V

Biases Each Load Device OFF with a 100kΩ

Resistor when V_DDBelow 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

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.

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

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.

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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