Datasheet

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bq24020 , , bq24022 , , bq24023

bq24024 , bq24025 , bq24026

bq24027

SLUS549E – DECEMBER 2002 – REVISED NOVEMBER 2007

• To obtain optimal performance, the decoupling capacitor from V

to V

and the output filter capacitors from

OUT to VSS should be placed as close as possible to the bqTINY, with short trace runs to both signal and

pins.

• All low-current V

connections should be kept separate from the high-current charge or discharge paths from

the battery. Use a single-point ground technique incorporating both the small-signal ground path and the

power-ground path.

• The BAT pin is the voltage feedback to the device. It should be connected with its trace as close to the

battery pack as possible.

• The high-current charge paths into IN and from the OUT pins must be sized appropriately for the maximum

charge current in order to avoid voltage drops in these traces.

• The bqTINY-II is packaged in a thermally-enhanced MLP package. The package includes a thermal pad to

provide an effective thermal contact between the device and the printed circuit board (PCB). Full PCB design

guidelines for this package are provided in the application note entitled: QFN/SON PCB Attachment

Application Note (TI Literature No. SLUA271 ).

Product Folder Link(s): bq24020 bq24022 bq24023 bq24024 bq24025 bq24026 bq24027