特性 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.