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bq24753ARHDT Datasheet(PDF) 8 Page - Texas Instruments |
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bq24753ARHDT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 38 page bq24753A SLUS920 – JULY 2009....................................................................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) 7 V ≤ VPVCC ≤ 24 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to AGND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT BAT SHORT (UNDERVOLTAGE) COMPARATOR VBAT_SHORT_FALL VBAT falling threshold to begin C/8 VBAT falling 2.75 2.9 3.05 V/cell charge VBAT_SHORT_HYS BATSHORT hysteresis VBAT rising 230 250 270 mV/cell Deglitch time of VBAT rising to resume VBAT > VBAT_SHORT+VBAT_SHORT_HYS 1.5 full charge s Deglitch time of VBAT falling to begin VBAT < VBAT_SHORT 1.5 C/8 charge BATSHORT EXIT delay to turn on BATFET and turn off ACFET when 600 ms LEARN=HIGH BATSHORT ENTRY delay to turn off BATFET and turn on ACFET when 10 µs LEARN=HIGH CHARGE OVERCURRENT COMPARATOR VOC Charge overcurrent rising threshold As percentage of IREG_CHG 145% OCP Floor Minimum overcurrent current limit Measure at (SRP-SRN) 50 mV CHARGE UNDERCURRENT COMPARATOR (SYNCHRONOUS TO NON-SYNCHRONOUS TRANSITION) VISYNSET_FALL Charge undercurrent falling threshold Changing from synchronous to non-synchronous 9.75 13 16.25 mV VISYNSET_HYS Charge undercurrent rising hysteresis 8 mV Charge undercurrent, falling-current 20 deglitch VIREG_DPM < VISYNSET µs Charge undercurrent, rising-current 640 deglitch INPUT OVERPOWER COMPARATOR (ACOP) ACOC Gain for initial ACOC current Begins 700 ms after ACDET, VACSET=1V % VACOC limit (Percentage of programmed Input current limited to this threshold for fault 250 265 283 VIREG_DPM VIREG_DPM) protection Maximum ACOC input current limit Internally limited ceiling, VACOC_CEILING 100 mV (VACP–VACN)max VACOC_MAX = (VACP–VACN)max ACOP Latch Blankout Time with ACOC Begins 700 ms after ACDET 2 active (does not allow ACOP latch-off, and no ACOP ms (begins 700 ms after ACDET) source current) ACOP pin latch-off threshold voltage VACOP (See ACOP in Terminal Functions 1.95 2 2.05 V table) Current source on when in ACOC limit. Function of Gain for ACOP Source Current when in KACOP voltage across power FET 18 µA / V ACOC IACOP_SOURCE = KACOP ×(VPVCC -VACP) ACOP Sink Current when not in ACOC IACOP_SINK ACOP Latch is reset by going below Current sink on when not in ACOC 5 µA ACDET or UVLO VACN-SHORT ACN Short protection threshold latching ACN < 2.4 V, ACDET > 2.4 V 2.4 V INPUT OVERVOLTAGE COMPARATOR (ACOV) AC Overvoltage rising threshold on VACOV OVPSET Measured on OVPSET 3.007 3.1 3.193 V (See OVPSET in Table 1) AC Overvoltage rising deglitch 1.3 VACOV_HYS ms AC Overvoltage falling deglitch 1.3 THERMAL SHUTDOWN COMPARATOR TSHUT Thermal shutdown rising temperature Temperature Increasing 155 °C TSHUT_HYS Thermal shutdown hysteresis, falling 20 °C BATTERY SWITCH (BATDRV) DRIVER RDS(off)_BAT BATFET Turn-off resistance VACN > 5 V 160 Ω RDS(on)_BAT BATFET Turn-on resistance VACN > 5 V 3 k Ω VBATDRV_REG = VACN – VBATDRV when VBATDRV_REG BATFET drive voltage 6.5 V VACN > 5 V and BATFET is on 8 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq24753A |
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