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BQ29200 Datasheet(PDF) 9 Page - Texas Instruments |
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BQ29200 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 24 page OUT Cell Voltage V PROTECT L H t d VC2-VC1, VC1 GND - V PROTECT - HYS V 9 bq29200, bq29209 www.ti.com SLUSA52C – SEPTEMBER 2010 – REVISED MARCH 2016 Product Folder Links: bq29200 bq29209 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated Feature Description (continued) If the cell overvoltage condition is removed before the external capacitor reaches the reference voltage, the internal current source is disabled and an internal discharge block is employed to discharge the external capacitor down to 0 V. In this instance, the OUT pin remains in a low state. 8.3.2 Cell Voltage > VPROTECT When one or both of the cell voltages rises above VPROTECT, the internal comparator is tripped, and the delay begins to count to td. If the input remains above VPROTECT for the duration of td, the bq2920x output changes from a low to a high state, by means of an internal pull-up network, to a regulated voltage of no more than 9.5 V when IOH = 0 mA. The external delay capacitor should charge up to no more than the internal LDO voltage (approximately 5 V typically), and will fully discharge in approximately under 100 ms when the overvoltage condition is removed. Figure 4. Timing for Overvoltage Sensing 8.3.3 Cell Connection Sequence NOTE Before connecting the cells, populate the overvoltage delay timing capacitor, CCD. The recommended cell connection sequence begins from the bottom of the stack, as follows: 1. GND 2. VC1 3. VC2 While not advised, connecting the cells in a sequence other than that described above does not result in errant activity on the OUT pin. For example: 1. GND 2. VC2 or VC1 3. Remaining VCx pin 8.3.4 Cell Balance Enable Control To avoid prematurely discharging the cells, it is recommended to turn off (pull high) the active-low Cell Balance Enable Control pin at lower State of Charge (SOC) levels. |
Similar Part No. - BQ29200_16 |
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Similar Description - BQ29200_16 |
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