Switch-mode Multi-chemistry Battery Charger With Peak Voltage Detection Termination

  The BQ2000 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. The BQ2000 detects the Battery chemistry and proceeds with the optimal charging and termination algorithms. This process eliminates undesirable undercharged or overcharged conditions and allows accurate and safe termination of fast charge. Depending on the chemistry, the BQ2000 provides a number of charge termination criteria: n ? ? For safety, the BQ2000 inhibits fast charge until the Battery voltage and temperature are within user-defined limits. If the Battery voltage is below the low-voltage threshold, the BQ2000 uses trickle-charge to condition the Battery For NiMH batteries, the BQ2000 provides an optional top-off charge to maximize the Battery capacity. The integrated high-frequency Comparator allows the BQ2000 to be the basis for a complete, high-efficiency power-conversion circuit for both nickel-based and lithium-based chemistries. ? ? Peak voltage, PVD (for NiCd and NiMH) Minimum charging current (f or Li-Ion) Maximum temperature Maximum charge time ? n n n ? ? Pin Connections Pin Names SNS VSS Current-sense input System ground Charge-status output Battery-voltage input RC VCC MOD TS Temperature-sense input Timer-program input Supply-voltage input Modulation-control output SNS VSS LED BAT 1 2 3 4 8 7 6 5 MOD VCC RC TS LED BAT 8-Pin DIP or Narrow SOIC or TSSOP PN-2000.eps SLUS138B?FEBRUARY 2001 F 1 BQ2000 Pin
Item: BQ2000
File Size : 52 KB
Pages : 18 Pages

Other Part Numbers in this pdf file

BQ2000SN-B5TRG4   BQ2000SN-B5TR   BQ2000SN-B5G4   BQ2000SN-B5   BQ2000PWRG4   BQ2000PWR   BQ2000PWG4   BQ2000PW   BQ2000PN-B5  
Texas Instruments Incorporated
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