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BQ2002D Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2002D Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 12 page  Features ➤ Fast charge of nickel cadmium or nickel-metal hydride batter- ies ➤ 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 ref- erence ➤ 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 General Description The bq2002D/T Fast-Charge IC are low-cost CMOS battery-charge control- lers able to provide reliable charge ter- mination for both NiCd and NiMH bat- tery 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 con- trol 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 re- placement. 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 Rate of temperature rise n Maximum voltage n Maximum temperature n Maximum time After fast charge, the bq2002T option- ally 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. 1 NiCd/NiMH Fast-Charge Management ICs bq2002D/T TM Timer mode select input LED Charging status output BAT Battery voltage input VSS System ground 1 PN-200201.eps 8-Pin DIP or Narrow SOIC 2 3 4 8 7 6 5 TM LED BAT VSS CC INH VCC TS TS Temperature sense input VCC Supply voltage input INH Charge inhibit input CC Charge control output Pin Connections Pin Names bq2002D/T Selection Guide Part No. TCO HTF LTF Fast Charge Time-Out Top-Off Maintenance bq2002D 0.225 ∗ VCC 0.25 ∗ VCC 0.4 ∗ VCC C/4 320 min C/64 C/256 1C 80 min C/16 C/256 2C 40 min None C/128 bq2002T 0.225 ∗ VCC 0.25 ∗ VCC None C/4 440 min None None 1C 110 min None None 2C 55 min None None SLUS133–JANUARY 2000 E |
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