AAT3681IJS-4.2-T1 Analogic Tech, AAT3681IJS-4.2-T1 Datasheet

AAT3681IJS-4.2-T1

Manufacturer Part Number

AAT3681IJS-4.2-T1

Description

Battery Management USB Port/Ad Lith-Ion Polymer

Manufacturer

Analogic Tech

Datasheet

1.AAT3681IJS-4.2-T1.pdf (15 pages)

Specifications of AAT3681IJS-4.2-T1

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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General Description

The AAT3681 BatteryManager is an integrated single cell

lithium-ion/polymer battery charger IC, designed to oper-

ate from a DC power source or USB port up to an input

voltage of 7.5V. It requires just one external component.

The AAT3681 precisely regulates battery charge voltage

and current for 4.2V (4.375V option) lithium-ion/poly-

mer battery cells. When charged from an AC adapter or

USB port, the battery charging current can be set by an

external resistor up to 300mA.

Battery charge state is continuously monitored for fault

conditions. In the event of an over-voltage, short-cir-

cuit, or over-temperature failure, the device will auto-

matically shut down, thus protecting the charging device,

control system, and the battery under charge. A status

monitor output pin is provided to indicate the battery

charge status by directly driving an external LED.

The AAT3681 is available in a Pb-free, thermally

enhanced, space-saving 8-pin 2.0x2.1mm SC70JW pack-

age and is specified for operation over the -40°C to

+85°C temperature range.

Typical Application

BatteryManager

3681.2009.03.1.6

Adapter/USB Input

Enable

USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger

SET

w w w . a n a l o g i c t e c h . c o m

ADP

STAT

ISET

AAT3681

Features

• USB or AC Adapter System Power Charger

• 4.0V ~ 7.5V Input Voltage Range

• High Level of Integration with Internal:

• Automatic Current Sensing

• Automatic Recharge Sequencing

• Full Battery Charge Auto Turn Off/Sleep Mode/Charge

• Shutdown Current <1μA

• Automatic Trickle Charge for Battery Pre-Conditioning

• Over-Voltage and Emergency Thermal Protection

• Power On Reset and Soft Start

• LED Status Pin

• 8-Pin 2.0x2.1mm SC70JW Package

Applications

• Bluetooth

• DECT Headsets

• Digital Still Cameras

• MP3, Portable Music, and Portable Media Players

• Personal Data Assistants (PDAs)

• Wrist Watches

• Other Lithium-Ion/Polymer Battery-Powered Devices

GND

BAT

▪

Termination

(AAT3681-1 is No Trickle Charge Option)

Programmable from 15mA to 300mA

Charging Device

Reverse Blocking Diode

Headsets

BATT+

BATT-

PRODUCT DATASHEET

Battery

Pack

AAT3681

Related parts for AAT3681IJS-4.2-T1

AAT3681IJS-4.2-T1 Summary of contents

Page 1

TM BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger General Description The AAT3681 BatteryManager is an integrated single cell lithium-ion/polymer battery charger IC, designed to oper- ate from a DC power source or USB port input ...

Page 2

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Pin Descriptions Pin # Symbol Type ISET In/Out 3 BAT In/Out 4 ADP Power In 5 ...

Page 3

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger AAT3681 Feature Options Product Trickle Charge AAT3681 Yes AAT3681-1 No Absolute Maximum Ratings Symbol Description V ADP Continuous P V ...

Page 4

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Electrical Characteristics -40°C to +85°C, unless otherwise noted. Typical values are T ADP A Symbol ...

Page 5

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Typical Characteristics Constant Charging Current vs. Set Resistor Values 1000 100 100 (kΩ Ω ...

Page 6

Page 7

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Typical Characteristics Recharging Threshold Voltage vs. Temperature = 8.06kΩ Ω SET 4.18 4.16 4.14 4.12 4.10 4.08 4.06 ...

Page 8

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Functional Block Diagram ADP ISET Charge STAT Status EN Functional Description The AAT3681 is a high performance battery charger designed ...

Page 9

TM BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Preconditioning Trickle Charge Phase Charge Complete Voltage I = Max CC Regulated Current Constant Current Mode Voltage Threshold Trickle Charge and Termination Threshold Figure 1: ...

Page 10

TM TM BatteryManager BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger System Operation Flow Chart No Shut Down No (AAT3681-1) No Recharge Test V > V RCH BAT 10 10 Enable ...

Page 11

TM BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Application Information Adapter or USB Power Input Constant current charge levels up to 300mA may be programmed by the user when powered from a sufficient input power source. The AAT3681 ...

Page 12

TM BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Charge Status Output The AAT3681 provides battery charge status via a status pin. This pin is internally connected to an N-channel open drain MOSFET, which can be used to drive ...

Page 13

TM BatteryManager USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger ( D(MAX CH(MAX BAT ( J(MAX) A θ CH(MAX ...

Page 14

... USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger Figure 5: AAT3681 Evaluation Board Top Layer. V IN(ADP) C1 10μF Figure 7: AAT3681 Evaluation Board Schematic Diagram. Component Part Number U1 AAT3681IJS-T1 R1 Chip Resistor R8 Chip Resistor JP1 Chip Resistor C1 GRM21BR61A106KE19L C2 GRM21BR71A225KA01L JP2 ...

Page 15

... Marking 1 REXYY STXYY SC70JW-8 0.225 ± 0.075 2.00 ± 0.20 0.100 0.45 ± 0. PRODUCT DATASHEET PRODUCT DATASHEET AAT3681 AAT3681 Part Number (Tape and Reel) 2 AAT3681IJS-4.2-T1 AAT3681IJS-4.2-1-T1 0.048REF 4° ± 4° 2.10 ± 0. ...

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