Datasheet > AAT4686IJS-T1

AAT4686IJS-T1

更新时间： 2024-01-15 03:03:38

品牌	Logo	应用领域
思佳讯 - SKYWORKS		/
页数	文件大小	规格书
13页	584K
描述
Buffer/Inverter Based MOSFET Driver,

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技术参数
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AAT4686IJS-T1 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.79
接口集成电路类型：	BUFFER OR INVERTER BASED MOSFET DRIVER	Base Number Matches：	1

AAT4686IJS-T1 数据手册

DATA SHEET

AAT4686

MOSFET Driver IC with Over-Voltage Protection

Functional Block Diagram

Fixed Option

GATE

OVP Sense

and Control

OVP

FLT

GND

input voltage exceeds the programmed voltage limit

(internally set or externally by a voltage divider to the

Functional Description

In conjunction with an external P-channel power MOSFET,

the AAT4686 provides up to 28V over-voltage protection

when powering low-voltage systems such as cell phones,

MP3, and PDAs or when charging Lithium-Ion batteries

from a poorly regulated supply. The P-channel MOSFET

is inserted between the power supply or charger source

and the load to be protected. The AAT4686 IC consists

of a P-channel MOSFET slew-rate controlled driver,

under-voltage lockout protection, over-voltage monitor,

fast shutdown circuitry, and a fault output flag.

OVP pin), the device immediately turns off the external

P-channel FET, disconnecting the load from the abnormal

voltage and thus preventing damage to any downstream

components. Simultaneously, the fault flag is raised,

alerting the system to a problem.

If an over-voltage condition is applied at the time of the

device enable, then the switch will remain OFF.

The AAT4686 can also be used as a simple slew-rate

controlled P-channel high side driver IC.

In normal operation, the P-channel MOSFET is controlled

by the AAT4686, connecting and disconnecting the

power supply from IN to OUT. A low resistance MOSFET

is used to minimize the voltage drop between the volt-

age source and the load and to reduce the power dissi-

pation. Any P-channel MOSFET can be used; however,

the turn-on and turn-off speed will vary inversely pro-

portionately to the MOSFET ON-resistance. When the

Under-Voltage Lockout (UVLO)

The AAT4686 has a fixed 3.0V under-voltage lockout

level (UVLO). When the input voltage is less than the

UVLO level, the MOSFET is turned off. 100mV of hyster-

esis is included to ensure circuit stability.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

201961A

• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 17, 2012

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