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BQ29311 Datasheet(PDF) 16 Page - Texas Instruments |
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BQ29311 Datasheet(HTML) 16 Page - Texas Instruments |
16 / 24 page bq29311 SLUS487D − DECEMBER 2001 − REVISED NOVEMBER 2003 www.ti.com 16 OCD: OVERCURRENT/OVERLOAD BLANKING DELAY OCD REGISTER (0X05) 7 6 5 4 3 2 1 0 OCDC3 OCDC2 OCDC1 OCDC0 OCDD3 OCDD2 OCDD1 OCDD0 This register is used to set the overcurrent and overload delay times. OCD b0−b3 (OCDD0−OCDD3): These four bits select the value of the delay time for overcurrent triggering in the discharge direction. 0000 is the default. OCD b3...b0 With Corresponding Delay Time 0000 1 ms 0100 9 ms 1000 17 ms 1100 25 ms 0001 3 ms 0101 11 ms 1001 19 ms 1101 27 ms 0010 5 ms 0110 13 ms 1010 21 ms 1110 29 ms 0011 7 ms 0111 15 ms 1011 23 ms 1111 31 ms OCD b4−b7 (OCDC0−OCDC3): These four bits select the value of the delay time for overcurrent triggering in the charge direction. 0000 is the default. OCD b7...b4 With Corresponding Delay Time 0000 1 ms 0100 9 ms 1000 17 ms 1100 25 ms 0001 3 ms 0101 11 ms 1001 19 ms 1101 27 ms 0010 5 ms 0110 13 ms 1010 21 ms 1110 29 ms 0011 7 ms 0111 15 ms 1011 23 ms 1111 31 ms SCV: SHORT-CIRCUIT THRESHOLD VOLTAGE SCV REGISTER (0X07) 7 6 5 4 3 2 1 0 − − − − SCV3 SCV2 SCV1 SCV0 This register selects the common short-circuit threshold voltage for both charge and discharge. SCV b0−b3 (SCV0 −SCV3): These four bits select the value of the short-circuit voltage threshold for both charge and discharge. 0000 is the default. SCV b0...b3 With Corresponding Threshold Voltage 0000 0.10V 0100 0.20V 1000 0.30V 1100 0.40V 0001 0.125V 0101 0.225V 1001 0.325V 1101 0.425V 0010 0.150V 0110 0.250V 1010 0.350V 1110 0.450V 0011 0.175V 0111 0.275V 1011 0.375V 1111 0.475V SCD: SHORT-CIRCUIT BLANKING DELAY SCD REGISTER (0X08) 7 6 5 4 3 2 1 0 SCDC3 SCDC2 SCDC1 SCDC0 SCDD3 SCDD2 SCDD1 SCDD0 This register selects the short-circuit blanking delay time for charge and discharge. SCD b0−b3 (SCDD0 −SCDD3): These four bits select the value of the short-circuit delay time for discharge. Exceeding the short-circuit voltage threshold for longer than this period turns off the DSG output. 0000 is the default. SCD b3...b0 With Corresponding Delay Time 0000 0 µs 0100 244 µs 1000 488 µs 1100 732 µs 0001 61 µs 0101 305 µs 1001 549 µs 1101 793 µs 0010 122 µs 0110 366 µs 1010 610 µs 1110 854 µs 0011 183 µs 0111 427 µs 1011 671 µs 1111 915 µs SCD b4−b7 (SCDC0 −SCDC3): These four bits select the value of the short-circuit delay time for charge. Exceeding the short-circuit voltage threshold for longer than this period turns off the CHG output. Not Recommended for New Designs |
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