Linear battery charger takes pass device onboard

The AAT3682 is a lithium-ion/polymer linear battery charger with an integrated pass device.

AnalogicTech has developed a lithium-ion/polymer linear battery charger with an integrated pass device.

Particularly in portable consumer applications like MP3 players and PDAs, space is always a scarce commodity.

So by integrating the pass device into the battery charger, the AAT3682 reduces external parts count and in the process, reduces the system footprint.

Designed especially for compact portable applications, the AAT3682 features an embedded microcontroller serial interface to communicate the state of the battery - whether it is charging or in an error condition - to the system.

The device supplies a 650mA charging current over a 4.7 to 6.0V input range.

It supports all charging phases, including preconditioning or trickle charge for deep cell discharge conditioning, constant current for maximum charging speed, and constant voltage for final battery top-off.

The AAT3682's quiescent current is typically 0.5mA.

In deep sleep mode, the device draws only 3uA of current (typical), further saving valuable portable power.

Specified over the -20 to +70C temperature range, AnalogicTech's AAT3682 is available immediately in a 16-pin QFN44 package.

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