The bq2002D/T Fast-Charge IC are low-cost CMOS battery-charge controllers able to provide reliable charge termination for both NiCd and NiMH battery applications. Controlling a current-limited or constant-current supply allows the bq2002D/T to be the basis for a cost-effective stand-alone or system-integrated charger. The bq2002D/T integrates fast charge with optional top-off and 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:
● Rate of temperature rise
● Maximum voltage
● Maximum temperature
● Maximum time
●After fast charge, the bq2002T optionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the INH pin. The bq2002D/T may be placed in low-standby-power mode to reduce system power consumption.
● Fast charge of nickel cadmium or nickel-metal hydride batteries
● Direct LED output displays charge status
● Fast-charge termination by rate of rise of temperature, maximum voltage, maximum
●temperature, and maximum time
● Internal band-gap voltage reference
● Optional top-off charge (bq2002T only)
● Selectable pulse-trickle charge rates (bq2002T only)
● Low-power mode
● 8-pin 300-mil DIP or 150-mil SOIC