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BQ2003STR Datasheet(PDF) 7 Page - Texas Instruments |
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BQ2003STR Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 20 page  7 bq2003 Battery Temperature? Discharge-Before-Charge Commanced? Trickle CHG = 1 3/8s high 1/8s low CHG = 1 3/8s low 1/8s high Fast CHG = Low Charge Pending Battery Voltage? New Charge Cycle Start or Discharge-Before-Charge Command VEDV < VCELL < VMCV and VHTF < VTEMP < VLTF VHTF < VTEMP < VLTF Trickle CHG = High VEDV < VCELL < VMCV Top-off CHG = 1/8s low 1/8s high VTEMP > VLTF or VTEMP < VHTF VCELL< VEDF - V or T/ t or VTEMP< VTCO or Maximum Time Out Discharge Top-off selected? Yes Yes No Trickle CHG = 1/8s low 1/8s high Fast CHG = High Hold-off period expired? No No Trickle CHG = High Hold-off period expires t > 1.5tMCV VCELL > VMCV VCELL > VMCV VCELL > VMCV VCELL > VCELL VMCV > VCELL VMCV < VEDV VCELL > VMCV VCELL < VMCV Charge Complete Battery Absent or Maximum Time Out VTEMP < VTCO SD2003.eps VCELL < VMCV Figure 3. State Diagram |
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