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BQ2056SN Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2056SN Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 12 page  1 Features ➤ Significant reduction in charge time with AutoComp charge-rate compensation ➤ Ideal for low-dropout linear regu- lator design ➤ 1-cell, 2-cell, and programmable multicell versions ➤ Low-cost charger implementation with minimum number of exter- nal components ➤ Programmable current limit to accommodate any battery size ➤ Interface to external trickle charger for reviving deeply dis- charged batteries ➤ High-accuracy charge control ➤ Sleep mode for low power con- sumption ➤ Direct battery voltage sense without resistive dividers (bq2056 and bq2056T) ➤ Small 8-pin SOIC package General Description The bq2056 series ICs are low-cost precision linear charge-control de- vices for Li-Ion batteries. With a minimum number of external compo- nents, the bq2056 is a complete low- dropout linear charger. The dropout voltage is typically less than 0.5V when the bq2056 is used with an ex- ternal PNP transistor or P-channel FET. Features include proprietary automatic charge-rate compensation (AutoComp) and a trickle-charger in- terface output for reviving deeply discharged cells. The bq2056 sup- ports a single-cell 4.1V pack and the 2056T supports a two-cell 8.2V pack. The bq2056V may be externally pro- grammed for supporting other volt- ages. All versions feature a sleep mode for low-power applications. bq2056/T/V Pin Connections Low-Dropout Li-Ion Charge-Control ICs with AutoComp™ Charge-Rate Compensation 1 PN-205601.eps 8-Pin DIP or Narrow SOIC 2 3 4 8 7 6 5 INH TRKL VSS COMP VCC CC BAT SNS 10/98 B BDbq2056.eps SNS BAT KCOMP COMP SNS CC TRKL INH VSS + + + 2.0V VREG 100mV Functional Block Diagram Pin Names INH Charge-inhibit input TRKL Trickle-charge interface output VSS Ground COMP Charge-rate compensation input SNS Current sense input BAT Battery voltage input CC Charge control output VCC Supply input |
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