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SI9730DBY-T1 Datasheet(PDF) 9 Page - Vishay Siliconix |
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SI9730DBY-T1 Datasheet(HTML) 9 Page - Vishay Siliconix |
9 / 14 page Si9730 Vishay Siliconix Document Number: 70658 S-40135—Rev. F, 16-Feb-04 www.vishay.com 9 Additionally, the battery as a whole can be undervoltage (UV), where VBATTERY < VUVL. Note that this final condition is not necessarily (though normally) mutually exclusive with the other cell conditions: if one cell were at 0V, the other cell could be in NO, and the battery could still be in UV. The charger can be either present (ON) or not present (OFF); the “X” in the table means the condition is true regardless of the state of the charger. The load current can be either 0, normal (0 < ILOAD < IILIMIT) or a short (IILIMIT< ILOAD) where IILIMIT is set by VILIMIT/RSENSE; the “X” in the table refers to a load current that can be either 0 or normal. Finally, the switch can be either ON, OFF, or cycling at either 1/8 or 7/8 duty cycle, where the duty cycle refers to the portion of the period when the switch is on; the notation On−>On simply means that the switch does not change state, it remains on; the notation −>Off means that the switch turns off regardless of its previous state. STATE TRANSITION TABLE High-Cell Voltage Low-Cell Voltage Charger On/Off Load Current Switch State NO NO Off>On X On−>On NO−>OC NO Off 0 On−>Off NO NO−>OC Off 0 On−>Off NO−>OC NO Off Normal Cycles at very high duty cycle NO NO−>OC Off Normal Cycles at very high duty cycle OC NO Off−>On X Off−>Off NO OC Off−>On X Off−>Off OC OC Off−>On X Off−>Off NO NO Off Normal−>Short On−>Off OC NO Off Normal−>Short On−>Off NO OC Off Normal−>Short On−>Off NO−>ODC NO Off 0 On−>Off NO NO−>ODC Off 0 On−>Off NO−>ODC NO Off Normal On−>Off NO NO−>ODC Off Normal On−>Off ODC NO Off−>On X Off−>Cycle at 7/8 duty cycle NO ODC Off−>On X Off−>Cycle at 7/8 duty cycle ODC ODC Off−>On X Off−>Cycle at 7/8 duty cycle UV Off−>On X Off−>Cycle at 1/8 duty cycle NO−>ODC OC Off 0 Cycle−>Off OC NO−>OC Off 0 Off NO NO V<0 X Off UV On Center Tap−>Open Cycle at 1/8 duty cycle ODC ODC X Center Tap−>Open −.>Off NO ODC X Center Tap−>Open −.>Off ODC NO X Center Tap−>Open −.>Off NO NO X Center Tap−>Open −.>Off OC OC X Center Tap−>Open −.>Off |
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