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BQ2058TSN-C2 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2058TSN-C2 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 18 page  Features ® Protects and individually moni- tors two Li-Ion series cells for overvoltage, undervoltage ® Monitors pack for overcurrent ® Designed for battery pack inte- gration ® Minimal external components ® Drives external FET switches ® Selectable overvoltage (VOV) thresholds - Mask programmable by Benchmarq - Standard version–4.25V ® Supply current: 12 µA typical ® Sleep current: 0.7 µA typical ® 16-pin 150-mil narrow SOIC General Description The bq2058T Lithium Ion Pack Su- pervisor is designed to control the charge and discharge cell voltage lim- its for two lithium-ion (Li-Ion) series cells, accommodating battery packs containing series/parallel configura- tions. The low operating current does not overdischarge the cells during pe- riods of storage and does not signifi- cantly increase the system discharge load. The bq2058T can be part of a low-cost Li-Ion charge control system within the battery pack. The bq2058T controls two external FETs to limit the charge and discharge potentials. The bq2058T allows charg- ing when each individual cell voltage is below VOV (overvoltage limit). If the voltage on any cell exceeds VOV for a user-configurable delay period (tOVD), the open-drain CHG pin goes to the high-impedance state, shutting off charge to the battery pack. This safety feature prevents overcharge of any cell within the battery pack. After an over- voltage condition occurs, each cell must fall below VCE (charge enable voltage) for the bq2058T to re-enable charging. The bq2058T protects batteries from overdischarge. If the voltage on any cell falls below VUV (undervoltage limit) for a user-configurable delay pe- riod (tUVD), the DSG output is driven low, shutting off the battery discharge. This safety feature prevents overdis- charge of any cell within the battery pack. The bq2058T also stops discharge on detection of an overcurrent condition, such as a short circuit. If an overcur- rent condition occurs for a user- configurable delay period (tOCD), the DSG output is driven low, disconnect- ing the load from the pack. DSG re- mains low until removal of the short circuit or overcurrent condition. 1 bq2058T Lithium Ion Pack Supervisor For 2-Cell Packs 1 PN2058T1.eps 16-Pin Narrow SOIC 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DSG VCC UVD OVD OCD VCC CSH BAT1P CHG CTL VSS CSL BAT2N BAT2N BAT2N BAT1N Pin Connections July 1997 CHG Charge control output CTL Pack disable input VSS Low potential input CSL Overcurrent sense low-side input BAT2N Battery 2 negative input BAT1N Battery 1 negative input DSG Discharge control output UVD Undervoltage delay input OVD Overvoltage delay input OCD Overcurrent delay input VCC High potential input CSH Overcurrent sense high-side input BAT1P Battery 1 positive input Pin Names |
Similar Part No. - BQ2058TSN-C2 |
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Similar Description - BQ2058TSN-C2 |
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