1-A Linear Li-Ion/Polymer Battery Charger with 28V Over-Voltage Protection

Manufacturer's part number :

AAT3783AIRN-4.2-T1

Manufacturer Skyworks

Skyworks

Description :

The AAT3783 BatteryManager™ is a single-cell Lithium-Ion (Li-Ion)/Li-Polymer battery charger IC, designed to operate from USB ports, AC adapter inputs, or from a charger adapter up to an input voltage of 6.5V. For increased safety, the AAT3783 also includes over-voltage input protection (OVP) up to 28V. The AAT3783 precisely regulates battery charge voltage and current for 4.2V Li-Ion/Polymer battery cells through an extremely low RDS(ON) switch. When charged from an adapter or a USB port, the battery charging current can be set by an external resistor up to 1A. In the case of an over-voltage condition in excess of 6.5V, a series switch opens preventing damage to the battery and charging circuitry. With the addition of an external resistor the OVP trip point can be programmed to a level other than the factory set value of 6.5V. In the case of an OVP condition a fault flag is activated. Battery charge state is continuously monitored for fault conditions. In the event of an over-current, battery over-voltage, short-circuit or over-temperature failure, the device will automatically 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. An open-drain power-source detection output (ADPP) is provided to report the power supply status. The AAT3783 comes in a thermally enhanced, space-saving, Pb-free 16-pin 3x4 mm TDFN package and is specified for operation over the -40°C to +85°C temperature range.

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    Features

    • USB or AC Adapter System Power Charger
    • Programmable from 100mA to 1A Max
    • 4.0V ~ 7.5V Input Voltage Range
    • Over-Voltage Input Protection up to 28V
    • High Level of Integration with Internal: Charging Device, Reverse Blocking Diode, Current Sensing
    • Digital Thermal Regulation
    • Charge Current Programming (ISET)
    • Charge Termination Current Programming (TERM)
    • Charge Timer (CT)
    • Battery Temperature Sensing (TS)
    • TS Pin Open Detection
    • Automatic Recharge Sequencing
    • No Trickle Charge Option Available
    • Full Battery Charge Auto Turn Off / Sleep State / Charge Termination
    • Automatic Trickle Charge for Battery Pre-conditioning
    • Battery Over-Voltage and Over-Current Protection
    • Emergency Thermal Protection
    • Power On Reset
    • 16-pin 3x4mm TDFN Package

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Features Similar products
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Linear Mode No  
Number of Cells 1  
Int/Ext FET Int  
Vcc Range (V) 4 to 7.5  
Voltage Regulation Accuracy (%) 0.5  
Temperature Monitor Yes  
Charge Safety Timers Yes  
Max Thermal Regulation Yes  
Operating Temperature (°C) -40 to +85  
Package TDFN34-16  
Cell Voltage (V) 4.2  
Max. Charging Current (mA) 1000