BQ2002E Datasheet PDF

UNITRODE BQ2002E

The bq2002E and bq2002G FastCharge ICs are low-cost CMOS battery-charge controllers providing reliable charge termination for both NiCd and NiMH battery applications. The bq2002E/G 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. For safety, fast charge is inhibited if the battery temperature and voltage are outside configured limits.

Part No.	BQ2002E
Datasheet	BQ2002E Download
Manufacturer	UNITRODE
Description	NiCd/NiMH Fast-Charge Management
Buy	Stock & Price

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 ® Optional top-off charge ® Selectable pulse trickle charge rates ® Low-power mode ® 8-pin 300-mil DIP or 150-mil SOIC Pin Connections

GENERAL DESCRIPTION

Controlling a current-limited or constant-current supply allows the bq2002E/G to be the basis for a costeffective stand-alone or system-integrated charger. Fast charge is initiated on application of the charging supply or battery replacement. Pin Names 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 bq2002E/G optionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the INH pin. The bq2002E/G may also be placed in low-standby-power mode to reduce system power consumption.