Datasheet > AAT3686

AAT3686

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		电池
页数	文件大小	规格书
24页	481K
描述
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger

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AAT3686 数据手册

AAT3686

USB Port/AC Adapter

Lithium-Ion/Polymer Battery Charger

Functional Block Diagram

Reverse Blocking

USB

USBSEL

USBH

Current

Compare

CV/

Precharge

USBL

Charge

Reduction

Loop

CHR

Charge

Control

UVLO

Constant

Current

BAT

Over-

Temperature

Protect

Current

Compare

ADPSET

ADP

Reverse Blocking

Voltage

Sense

ADPP#

80µA

STAT1

STAT2

Charge

Status

Window

Comparator

Serial

Data

IC enable

DATA

Watchdog

Timer

GND

maintaining the regulated port voltage. This system

assures the battery charge function will not overload

a USB port while charging if other system demands

also share power with the respective port supply.

The USB charge function is automatically disabled

when an adapter input power source greater than

4.4V is present.

Functional Description

The AAT3686 is a highly integrated single-cell lithium-

ion/polymer battery charger IC designed to operate

with USB port and AC adapter inputs, while requiring

a minimum number of external components. The

AAT3686 precisely regulates battery charge voltage

and current for 4.2V lithium-ion/polymer battery cells.

Status monitor output pins are provided to indicate

the battery charge status by directly driving two

external LEDs. A serial interface output is available

to report 22 various status states to a microcontroller.

The adapter charge input constant current level can

be programmed up to 1.5A for rapid charging appli-

cations. In the absence of a high current adapter

input source, the AAT3686 can be powered from a

USB port V_BUSsupply. Depending on the USB port

type, the AAT3686 constant charge current can be

externally programmed for two levels, USB high and

USB low, for maximum constant current charge lev-

els up to 500mA. Typically, the USB charge levels

are set at 500mA and 100mA for the USBH and

USBL modes; however, the user may program

either mode to any level up to 500mA.

Battery temperature and charge state are fully mon-

itored for fault conditions. In the event of an over-

voltage or over-temperature failure, the device will

automatically shut down, thus protecting the charg-

ing device, control system, and the battery under

charge. In addition to internal charge controller ther-

mal protection, the AAT3686 also provides a tem-

perature sense feedback function (TS pin) from the

battery to shut down the device in the event the bat-

tery exceeds its own thermal limit during charging.

All fault events are reported to the user either by the

simple status LEDs or via the DATA pin function.

The USBH/L mode has automatic Charge Reduction

Loop control to allow users to charge the battery with

limited available current from a USB port, while

3686.2006.06.1.5

1...7 8 91011 12 13...24

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与AAT3686相关器件

型号	品牌	描述	获取价格	数据表
AAT3686_08	ANALOGICTECH	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格
AAT3686-1	ANALOGICTECH	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格
AAT3686-3	ANALOGICTECH	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格
AAT3686IRN-4.2-T1	AAT	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格
AAT3686IRN-4.2-T1	ANALOGICTECH	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格
AAT3686IXN-4.2-1-T1	AAT	USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger	获取价格

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