BQ2002C Datasheet | UNITRODE

bq2002C NiCd/NiMH Fast-Charge Management IC Features - Fast charge of nickel cadmium or nickel-metal hydride batteries - Direct LED output displays charge status - Fast-charge termination by -∆V, 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: n Peak voltage detection (PVD) n Negative delta voltage (-∆V) n Maximum voltage n Maximum temperature n 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. Pin Connections TM LED BAT VSS 1 8 CC 2 7 INH 3 6 VCC 4 5 TS 8-Pin DIP or Narrow SOIC PN-200201.eps Pin Names TM LED BAT VSS Timer mode select input Charging status output Battery voltage input System ground TS Temperature sense input VCC Supply voltage input INH Charge inhibit input CC Charge control output SLUS136 - AUGUST 2011 1 bq2002C Pin...