Features
➤ Fast charge of nickel cadmium
or nickel-metal hydride batteries
➤ Direct LED output displays
charge status
➤ Fast-charge termination by -ΔV,
maximum voltage, maximum
temperature, and maximum
time
➤ Internal band-gap voltage reference
➤ Selectable pulse-trickle charge
rates
➤ Low-power mode
➤ 8-pin 300-mil DIP or 150-mil
SOIC

General Description
The bq2002C Fast-Charge IC is a lowcost
CMOS battery-charge controller
providing reliable charge termination
for both NiCd and NiMH battery applications.
Controlling a current-limited
or constant-current supply allows the
bq2002C to be the basis for a costeffective
stand-alone or system-integrated
charger. The bq2002C integrates
fast charge with pulsed-trickle
control in a single IC for charging one
or more NiCd or NiMH battery cells.
Fast charge is initiated on application
of the charging supply or battery
replacement. For safety, fast charge is
inhibited if the battery temperature
and voltage are outside configured
limits.
Fast charge is terminated by any of
the following:

Peak voltage detection (PVD)

Negative delta voltage (-ΔV)

Maximum voltage

Maximum temperature

Maximum time
After fast charge, the bq2002C pulsetrickles
the battery per the preconfigured
limits. Fast charge may be
inhibited using the INH pin. The
bq2002C may also be placed in lowstandby-
power mode to reduce
system power consumption.