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BQ76PL102 Dataheets PDF



Part Number BQ76PL102
Manufacturers Texas Instruments
Logo Texas Instruments
Description Dual-Cell Li-Ion Battery Monitor
Datasheet BQ76PL102 DatasheetBQ76PL102 Datasheet (PDF)

bq76PL102 www.ti.com ... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 PowerLAN™ Dual-Cell Li-Ion Battery Monitor With PowerPump™ Cell Balancing FEATURES 1 •2 Monitors up to Two Individual Cell Voltages and Temperatures • Part of a Complete Low-Cost Solution for Battery Packs of up to 12 Series and One or More Parallel Cells (When Used With bq78PL114). • Advan.

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bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 PowerLAN™ Dual-Cell Li-Ion Battery Monitor With PowerPump™ Cell Balancing FEATURES 1 •2 Monitors up to Two Individual Cell Voltages and Temperatures • Part of a Complete Low-Cost Solution for Battery Packs of up to 12 Series and One or More Parallel Cells (When Used With bq78PL114). • Advanced PowerPump™ Balancing Technology Equalizes Cells in Li-Ion Battery Packs, Resulting in Longer Run Time and Cell Life. • PowerPump™ Cell Balancing Transfers Charge From Cell to Cell During all Operating Conditions – No Wasteful Current Bleeding or Associated Heat Buildup. • Unique PowerLAN™ Isolated Communications Technology Permits Simultaneous Measurement of All Individual Cell Voltages in a Series String. • Low Current Consumption: – <250 µA Active – <35 µA Standby – <1 µA Undervoltage Shutdown • Connects Directly to Cells, No Resistive Dividers • Internal LDO Regulator for Support Circuitry • Ultrasmall Footprint, 3-mm × 3-mm • Millivolt Measurement Resolution Using Delta-Sigma A/D Converter • Self-Calibrating Time Base – No Crystal Required When Used With bq78PL114 APPLICATIONS • Uninterruptible Power Supplies (UPS) • Portable Medical and Test Equipment • Electric Bikes and Mild-EV Battery Packs • Multicell Series Strings ≥ 5S RELATED DEVICES • bq78PL114 Master Gateway Battery Controller DESCRIPTION The bq76PL102 PowerLAN dual-cell battery monitor is part of a complete scalable battery management system for use with arrays of up to 12 Li-Ion rechargeable cells. The bq76PL102 connects to one or two cells in a series string, performs voltage and temperature monitoring of each individual cell, and reports these parameters over the PowerLAN communication network. Together with a bq78PL114 master-gateway battery controller, the bq76PL102 forms a complete battery monitoring and management system for higher cell-count applications. Partitioning of the battery monitor function on a per cell basis permits connection and measurement close to the cell. This results in superior accuracy and management over competing solutions. This scheme also facilitates the PowerPump cell balancing system, a technique which actively balances capacities of Li-Ion batteries without the excessive heat or limitations of bleed-balancing techniques. The bq76PL102 PowerPump cell balancing technology uses a charge-transfer methodology which does not bleed off excess energy as heat, but instead moves energy dynamically from cell to cell as needed. Balancing is performed during all battery operational modes – charge, discharge, and rest. Balancing is automatically coordinated between all cells on a PowerLAN system. PowerPump balancing technology results in longer run time and longer cell life. The PowerLAN communications architecture has been engineered to provide robust communications in tough EMI/RFI environments while avoiding the excessive power draw, high parts count, and elevated cost of other solutions. PowerLAN permits easy scalability using series connections of bq76PL102 dual-cell battery monitors. High-cell-count battery systems of up to 12 series cells are easily constructed without complicated high-voltage cell measurement restrictions. The bq76PL102 works with the bq78PL114 master-gateway battery controller. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPump, PowerLAN are trademarks of Texas Instruments. 2 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008–2009, Texas Instruments Incorporated bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PowerLAN™ Communications Control Logic V2 D-S A/D XT2 Typical Temp Vref Sensor + Cell Balancing Circuits SDI SDO V1 D-S A/D XT1 Internal Temperature Typical Temp Sensor + PUMP2N PowerPump™ B.


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