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BQ2002FSNG4 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2002FSNG4 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 17 page  1 Features ➤ Fast charge of nickel cadmium or nickel-metal hydride batter- ies ➤ Direct LED output displays charge status ➤ Fast-charge termination by - ∆V, maximum voltage, maximum temperature, and maximum time ➤ Internal band-gap voltage ref- erence ➤ Optional top-off charge ➤ Selectable pulse trickle charge rates ➤ Low-power mode ➤ 8-pin 300-mil DIP or 150-mil SOIC General Description The bq2002 and bq2002/F Fast-Charge ICs are low-cost CMOS battery-charge controllers providing reliable charge termination for both NiCd and NiMH battery applications. Controlling a current-limited or constant-current supply allows the bq2002/F to be the basis for a cost-effective stand-alone or system-integrated charger. The bq2002/F 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 Peak voltage detection (PVD) n Negative delta voltage (- ∆V) n Maximum voltage n Maximum temperature n Maximum time After fast charge, the bq2002/F op- tionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the INH pin. The bq2002/F may also be placed in low-standby-power mode to reduce system power consumption. The bq2002F differs from the bq2002 only in that a slightly differ- ent set of fast-charge and top-off time limits is available. All differ- ences between the two ICs are illus- trated in Table 1. NiCd/NiMH Fast-Charge Management ICs bq2002/F 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 bq2002/F Selection Guide Part No. TCO HTF LTF - ∆V PVD Fast Charge tMTO Top-Off Maintenance bq2002 0.5 ∗ VCC None None ✔ C/2 160 C/32 C/64 ✔ 1C 80 C/16 C/64 ✔ 2C 40 None C/32 bq2002F 0.5 ∗ VCC None None ✔ C/2 160 C/32 C/64 ✔ 1C 100 C/16 C/64 ✔ 2C 55 None C/32 SLUS131 – A PRIL 2009 |
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