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BQ2002C-BQ2002CPN-BQ2002CSN
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 Selectable pulse-trickle charge
rates Low-power mode 8-pin 300-mil DIPor 150-mil
SOIC
General DescriptionThe bq2002C Fast-ChargeICisa low-
cost CMOS battery-charge controller
providing reliable charge termination
for both NiCd and NiMH battery appli-
cations. Controllinga current-limited constant-current supply allowsthe
bq2002Ctobe the basisfora cost-
effective stand-aloneor system-inte-
grated charger. The bq2002C inte-
grates fast charge with pulsed-trickle
controlina singleICfor charging one
ormore NiCd orNiMH batterycells.
Fast chargeis initiatedon application the charging supplyor battery
replacement. For safety, fast chargeis
inhibitedif the battery temperature
and voltage are outside configured
limits.
Fast chargeis terminatedby anyof
the following:
Peak voltage detection (PVD)
Negative delta voltage (-ΔV)
Maximum voltage
Maximum temperature
Maximum time
After fast charge,the bq2002C pulse-
trickles the battery per the pre-
configured limits. Fast charge maybe
inhibited using the INH pin. The
bq2002C may alsobe placedin low-
standby-power modeto reduce
system powerconsumption.
NiCd/NiMH Fast-Charge Management IC
bq2002C Timer mode select input
LED Charging status output
BAT Battery voltage input
VSS System ground Temperature senseinput
VCC Supply voltage input
INH Charge inhibit input Charge control output
Pin Connections Pin NamesSLUS136 - AUGUST 2011
