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bq294602 Datasheet(PDF) 10 Page - Texas Instruments |
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bq294602 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 21 page VCELL OUT VDD VSS bq2946xx Pack + Pack – NC V1 VSS RVD CVD RIN CIN 10 bq294602, bq294604, bq294682, bq294624 SLUSAS0D – DECEMBER 2011 – REVISED APRIL 2017 www.ti.com Product Folder Links: bq294602 bq294604 bq294682 bq294624 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The bq2946xx devices are a family of second-level protectors used for overvoltage protection of the single-cell battery pack in the application. The OUT pin drives a NMOS FET that connects the fuse to ground in the event of a fault condition. This provides a shorted path to use the battery and/or charger power to blow the fuse and cut the power path. 9.1.1 Application Configuration Changes to the ranges stated in Table 1 may impact the accuracy of the cell measurements. Figure 8 shows each external component. NOTE Connect VSS (pins 3 and 4) externally to the CELL– terminal. 9.2 Typical Application Figure 8. Application Configuration Schematic NOTE Connect VSS (pins 3 and 4) externally to the CELL– terminal. 9.2.1 Design Requirements For this design example, use the parameters listed in Table 1 as the input parameters. Table 1. Parameters PARAMETER EXTERNAL COMPONENT MIN NOM MAX UNIT Voltage monitor filter resistance RIN 900 1000 1100 Ω Voltage monitor filter capacitance CIN 0.01 0.1 µF Supply voltage filter resistance RVD 100 1K Ω Supply voltage filter capacitance CVD 0.1 µF |
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