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BQ29200 Datasheet(PDF) 10 Page - Texas Instruments |
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BQ29200 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 24 page VC2 7.6 V 6 V 100% 79% 8.4 V 111% (VC2 VC1) CB2 + )+ VD CB CB2 I (R R R - = VC1 CB1 R CB CB1 I R = + 10 bq29200, bq29209 SLUSA52C – SEPTEMBER 2010 – REVISED MARCH 2016 www.ti.com Product Folder Links: bq29200 bq29209 Submit Documentation Feedback Copyright © 2010–2016, Texas Instruments Incorporated Feature Description (continued) 8.3.5 Cell Balance Configuration The cell balancing current may be calculated as follows: For Cell 1 (VC1–GND) balancing current, ICB1: (1) For Cell 2 (VC2–VC1) balancing current, ICB2: (2) Where: RCB = resistor connected between the top of Cell 1 and the VC1_CB RCB1 = resistor connected between the top of Cell 1 and the VC1 RCB2 = resistor connected between the top of Cell 2 and the VC2 RVD = resistor connected between the top of Cell 2 and the VDD 8.3.6 Cell Imbalance Auto-Detection (Via Cell Voltage) The VMM_DET_ON and VMM_DET_OFF specifications are calibrated where VDD = VC2 = 7.6 V and VC1 = 3.8 V. The recommended range of cell balancing is VC2 and VDD between 6.0 V and 8.4 V, and VC1 between 3 V and 4.2 V. Below VDD = 6 V, it is recommended to pull CB_EN high to disable the cell balancing function. Figure 5. VMM_DET_ON and VMM_DET_OFF Threshold 8.3.7 Customer Test Mode Customer Test Mode (CTM) helps to greatly reduce the overvoltage detection delay time and enable quicker customer production testing. This mode is intended for quick-pass board-level verification tests, and, as such, individual cell overvoltage levels may deviate slightly from the specifications (VPROTECT, VOA). If accurate overvoltage thresholds are to be tested, use the standard delay settings that are intended for normal use. To enter CTM, VDD should be set to approximately 9.5 V higher than VC2. When CTM is entered, the device switches from the normal overvoltage delay time scale factor, XDELAY, to a significantly reduced factor of approximately 0.08, thereby reducing the delay time during an overvoltage condition. |
Similar Part No. - BQ29200_16 |
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Similar Description - BQ29200_16 |
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