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 ..
BQ2002GPN ,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 ..
BQ2002PN ,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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BQ2002FPN-BQ2002FSN-BQ2002FSNTR
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 -∆V,
maximum voltage, maximum
temperature, and maximum
time Internal band-gap voltage ref-
erence Optional top-off charge Selectable pulse trickle charge
rates Low-power mode 8-pin 300-mil DIPor 150-mil
SOIC
General DescriptionThe bq2002 and bq2002/F Fast-Charge
ICsare low-cost CMOS battery-charge
controllers providing reliable charge
terminationfor both NiCd and NiMH
battery applications. Controllinga
current-limitedor constant-current
supply allows the bq2002/Ftobe the
basisfora cost-effective stand-aloneor
system-integrated charger. The
bq2002/F integrates fast charge with
optional top-off and pulsed-trickle con-
trolina singleICfor charging oneor
more NiCd orNiMH batterycells.
Fast chargeis initiatedon application the charging supplyor batteryre-
placement. For safety, fast chargeis
inhibitedif the battery temperature
and voltage are outside configured
limits.
Fast chargeis terminatedby anyof
thefollowing:
Peak voltage detection (PVD)
Negativedelta voltage(-∆V)
Maximum voltage
Maximum temperature
Maximum time
After fast charge, the bq2002/F op-
tionally tops-off and pulse-tricklesthe
battery perthe pre-configured limits.
Fast charge maybe inhibited using
the INH pin. The bq2002/F may also placedin low-standby-power mode
toreduce systempower consumption.
The bq2002F differs from the
bq2002 onlyin thata slightly differ-
ent setof fast-charge and top-off
time limitsis available. All differ-
ences between the two ICs are illus-
trated inTable1.
NiCd/NiMH Fast-Charge Management ICs
bq2002/F 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 Names
bq2002/F Selection GuideSLUS131 – APRIL 2009
