Datasheet > AAT4682

AAT4682

更新时间： 2022-12-12 04:37:31

品牌	Logo	应用领域
ANALOGICTECH		开关
页数	文件大小	规格书
8页	243K
描述
Dual Electronic Resettable Switches

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AAT4682 数据手册

AAT4682

Dual Electronic Resettable Switches

Functional Block Diagram

INA

OUTB

I_LIM

UVLO

OTMP

I_LIM

OUTB

FAULTA

FAULTB

3ms Blanking

GND

will thermal cycle indefinitely until the over current

condition is removed. Due to the high thermal con-

ductivity of silicon and the size of the die, the tem-

perature across the die is relatively uniform at high

temperatures, and therefore, as a precaution, both

power devices are switched off when the thermal

threshold is reached. The AAT4682 operates with

input voltages ranging from 1.8V to 5.5V which,

along with its extremely low operating current,

makes it ideal for battery-powered applications. In

cases where the input voltage drops below 1.8V,

the AAT4682 internal MOSFETS are protected

from entering the saturated region of operation by

being automatically shut down by an undervoltage

lockout circuit.

Functional Description

The AAT4682 is a dual channel electronic reset-

table fuse that protects against short circuit condi-

tions by current limiting to a preset level. A patent-

ed fast acting current limit loop limits load current in

a fraction of a microsecond, and instantly resets

back to a low impedance state once the short cir-

cuit condition is removed. A current limit condition

is reported by the open drain FAULT output after a

two millisecond blanking interval. The blanking

prevents false reporting during the charging of a

capacitive load, which typically occurs when a load

is connected. The AAT4682 is internally protected

from thermal damage by an over temperature

detection circuit. If the die temperature reaches the

internal thermal limit, both power devices are

switched off until the die temperature cools to a

level below the thermal limit threshold. The device

The AAT4682 is ideally suited for protection of

peripheral ports such as USB, RS232 and parallel

ports.

4682.2001.11.0.9

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