Datasheet Texas Instruments BQ2954SN — Ficha de datos

bq2954
Lithium Ion Charge Management IC
with Integrated Switching Controller
Features General Description вћ¤ Safe charge of Li-Ion battery
packs The bq2954 Li-Ion Charge-Management IC uses a flexible pulse-width
modulation regulator to control voltage and current during charging.
The regulator frequency is set by an
external capacitor for design flexibility. The switch-mode design minimizes power dissipation. вћ¤ Pulse-width modulation control
for current and voltage regulation
вћ¤ Programmable high-side/low-side
current-sense
вћ¤ Fast charge terminated by selectable minimum current; safety
backup termination at maximum
time
вћ¤ Pre-charge qualification detects
shorted or damaged cells and
conditions battery
вћ¤ Charging continuously qualified
by temperature and voltage limits
вћ¤ Direct LED control outputs to
display charge status and fault
conditions Pin Connections The bq2954 charges a battery in two
phases. First a constant-current …