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AAT8635

AAT
Part Number AAT8635
Manufacturer AAT
Description ONE-CELL LI-ION BATTERY PROTECTION IC
Published Apr 30, 2007
Detailed Description Advanced Analog Technology, Inc. AAT8635 Series Details are subject to change without notice ONE-CELL LI-ION BATTERY PR...
Datasheet PDF File AAT8635 PDF File

AAT8635
AAT8635

Overview
Advanced Analog Technology, Inc.
AAT8635 Series Details are subject to change without notice ONE-CELL LI-ION BATTERY PROTECTION IC FEATURES • Ideal for One-Cell Rechargeable Li-Ion Battery Pack.
• Low Current Consumption 3.
0µA ………….
.
Supply Current (Typical) 0.
6µA ………….
.
Standby Current • High Withstand Voltage Absolute Maximum Ratings.
.
22V ( VDD − VN ) GENERAL DESCRIPTION The AAT8635 series are protection ICs designed to safeguard one-cell rechargeable Li-Ion battery pack against over charge, over discharge, over current, and short circuit.
The AAT8635 series use advanced high voltage CMOS process to provide high accuracy voltage detection and low current consumption.
The AAT8635 series incorporate a reference unit and three voltage detectors.
During the charging process, when the cell voltage ( VDD ) is charged to a value higher than the over charge threshold voltage ( VC1 ), the over charge detector (COM1) will switch the output pin ( C OUT ) to a low level within a delay time ( t C1 ), and thus turning off the • High Accuracy Voltage Detection Over Charge Detector………….
.
.
± 50mV Over Discharge Detector……….
± 3.
2% • Over Current and Short Circuit Protection • Wide Operating Temperature Range − 40 o C to 85 o C www.
DataSheet4U.
com • Ultra Small Package…….
.
SOT26 PIN CONFIGURATION MOSFET connected to the charging path.
The C OUT pin may change to high level again when the VDD voltage falls below “ VC1 − VHYS ”, or when VDD falls below VC1 while the charger is disconnected from the battery pack.
During the discharging process, when the VDD drops to a value lower than the over-discharge threshold voltage ( VD1 ), the over-discharge detector (COM2) will switch D OUT to low level within a delay time ( t D1 ), and thus turning off the MOSFET connecting to the discharging path.
In the mean time, the AAT8635 series will enter a low current standby mode.
Once into standby mode, the systems can only be released from DOUT GND VN VDD COUT Cext – ¥xÆWÃþ¤ñ¬ì§ÞªÑ¥÷¦³-½...


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