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1FEATURES

2· Small 3 mm ′ 3 mm MLP Package

· Charges and powers Systems from Either AC

Adapter or USB With Autonomous

power-Source Selection

· Integrated USB Control With Selectable 100

mA and 500 mA Charge Rates

· Ideal for Low-Dropout Charger Designs for

Single-Cell Li-Ion or Li-pol Packs in Space

Limited portable applications

· Integrated power FET and Current Sensor for

Up to 1-A Charge applications From AC

Adapter

· Precharge Conditioning With Safety Timer

· power Good (AC Adapter Present) Status

Output

· Optional Battery Temperature Monitoring

Before and During Charge

· Automatic Sleep Mode for Low-power

Consumption

APPLICATIONS

· PDAs, MP3 Players

· Digital Cameras

· Internet appliances

· Smartphones

DESCRIPTION

The bqTINY-II series are highly-integrated, flexible

Li-Ion linear charge and system power management

devices for space-limited charger applications. In a

single monolithic device, the bqTINY-II offers

integrated USB-port and ac-adapter supply management with autonomous power-source

selection, power-FET and current-sensor interfaces,

high-accuracy current and voltage regulation, charge

status, and charge termination.

The bqTINY-II automatically selects the USB-port or

the ac-adapter as the power source for the system. In

the USB configuration, the host can select from two

preset charge rates of 100 mA or 500 mA. In the

ac-adapter configuration, an external resistor sets the

system or charge current.

The bqTINY-II charges the battery in three phases:

conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An

internal charge timer provides a backup safety for

charge termination. The bqTINY-II automatically

restarts the charge if the battery voltage falls below

an internal threshold. The bqTINY-II automatically

enters sleep mode when both supplies are removed.