BQ2002ESN ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection TerminationGeneral DescriptionFast charge is terminated by any ofthe following:* Fast charge of nickel cadmium ..
BQ2002FPN ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection TerminationGeneral DescriptionFast charge is terminated by any ofthe following:➤ Fast charge of nickel cadmium ..
BQ2002FSN ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection TerminationFunctional DescriptionOpen-drain output that indicates the chargingFigure 2 shows a state diagram a ..
BQ2002FSN ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection TerminationFunctional DescriptionOpen-drain output that indicates the chargingFigure 2 shows a state diagram a ..
BQ2002FSN ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection Terminationblock diagram of the bq2002/F.BAT Battery input voltageBattery Voltage and TemperatureThe battery v ..
BQ2002FSNTR ,NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection TerminationGeneral DescriptionFast charge is terminated by any ofthe following:➤ Fast charge of nickel cadmium ..
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BQ2002ESN
NiCd/NiMH Gating Charge Management IC With Negative dV And Peak Voltage Detection Termination
Features Fast chargeof nickel cadmium nickel-metal hydride batter-
ies Direct LED output displays
charge status Fast-charge terminationby -ΔV,
maximum voltage, maximum
temperature, and maximum
time Internal band-gap voltage ref-
erence Optional top-offcharge Selectable pulse trickle charge
rates Low-power mode 8-pin 300-mil DIPor 150-mil
SOIC
General DescriptionThe bq2002E and bq2002G Fast-
Charge ICs are low-cost CMOS bat-
tery-charge controllers providing reli-
able charge terminationfor both NiCd
and NiMH battery applications. Con-
trollinga current-limitedor con-
stant-current supply allows the
bq2002E/Gtobethe basisfora cost-
effective stand-aloneor system-inte-
grated charger. The bq2002E/G inte-
grates fast charge with optional top-off
and pulsed- trickle controlina singlefor charging oneor more NiCdor
NiMH battery cells.
Fast chargeis initiatedon applicationthe charging supplyor batteryre-
placement. For safety, fast chargeis
inhibitedif the battery temperature
and voltage are outside configured
limits.
Fast chargeis terminatedby anyof
the following:
Peak voltage detection(PVD)
Negativedelta voltage (-ΔV)
Maximum voltage
Maximum temperature
Maximum time
After fast charge,the bq2002E/Gop-
tionally tops-off and pulse-tricklesthe
battery perthe pre-configured limits.
Fast charge maybe inhibited using
the INH pin. The bq2002E/G may
alsobe placedin low-standby-power
modeto reduce system power con-
sumption.
The bq2002E differs from the
bq2002G onlyin thata slightly dif-
ferentsetof fast-charge and top-off
time limitsis available. All differ-
ences betweenthe two ICsare illus-
tratedin Table1.
NiCd/NiMH Fast-Charge Management ICs
bq2002E/G Timer mode select input
LED Charging status output
BAT Battery voltage input
VSS System ground Temperature sense input
VCC Supply voltage input
INH Charge inhibit input Charge control output
Pin Connections Pin NamesSLUS132 - FEBRUARY 1999
bq2002E/G Selection Guide
