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BQ294706DSGT Datasheet(PDF) 1 Page - Texas Instruments |
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BQ294706DSGT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 24 page 100 VCELL1 VCELL3 VCELL2 OUT VDD VSS 0. 1 µF 1k 1k Pack+ Pack– V3 V2 V1 V4 CD VCELL4 PWPD 0. 1 µF 0.1 µF 0.1 µF 0.1 µF 1k 1k 0.1 µF Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. bq2947 SLUSB15E – SEPTEMBER 2012 – REVISED FEBRUARY 2016 bq2947 Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor 1 1 Features 1 • 2-, 3-, and 4-Series Cell Overvoltage Protection • External Capacitor-Programmed Delay Timer • Factory Programmed OVP Threshold (Threshold Range 3.85 V to 4.6 V) • Output Options: Active High or Open Drain Active Low • High-Accuracy Overvoltage Protection: ±10 mV • Low Power Consumption ICC ≈ 1 µA (VCELL(ALL) < VPROTECT) • Low Leakage Current Per Cell Input < 100 nA • Small Package Footprint – 8-Pin WSON (2.00 mm x 2.00 mm) 2 Applications • Notebook • UPS Battery Backup 3 Description The bq2947 family is an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. In the bq2947 device, an external delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low, depending on the configuration). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver in an overvoltage condition. For quicker production-line testing, the bq2947 device provides a Customer Test Mode with reduced delay time. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) bq294700 WSON (8) 2.00 mm × 2.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. spacer Simplified Schematic |
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