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BQ24705 Datasheet(PDF) 7 Page - Texas Instruments |
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BQ24705 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 32 page  bq24705 www.ti.com............................................................................................................................................... SLUS779B – DECEMBER 2007 – REVISED MARCH 2009 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 ACDET COMPARATOR VPVCC-BAT_OP Differential Voltage from PVCC to BAT –20 24 V VACDET_CHG Min voltage to enable charging, ACDET adapter-detect rising threshold 2.376 2.40 2.424 V VACDET rising VACDET_CHG_HYS ACDET falling hysteresis VACDET falling 40 mV ACDET rising deglitch(1) VACDET rising 6.4 8 9.6 ms ACDET falling deglitch VACDET falling 10 µs Min voltage to enable all bias, VACDET VACDET_BIAS ACDET enable-bias rising threshold 0.56 0.62 0.68 V rising VACDET_BIAS_HYS Adapter present falling hysteresis VACDET falling 20 mV ACDET_BIAS rising deglitch (1) VACDET rising 10 µs ACDET_BIAS falling deglitch VACDET falling 10 OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (ACGOOD) VO(LO) Output low saturation voltage Sink Current = 4 mA 0.5 V ACGOOD falling delay VACDET rising 6.4 8 9.6 ms ACGOOD rising delay VACDET falling 10 µs INPUT OVERVOLTAGE COMPARATOR (ACOV) AC Overvoltage rising threshold on VACOV ACDET 3.007 3.1 3.193 V (See ACDET in Terminal Functions) VACOV_HYS AC Overvoltage rising deglitch 1.3 ms AC Overvoltage falling deglitch 1.3 PVCC / BAT COMPARATOR VPVCC-BAT_FALL PVCC to BAT falling threshold VPVCC – VBAT falling to disable 140 185 240 mV Charger VPVCC-BAT__HYS PVCC to BAT hysteresis 50 mV PVCC to BAT Rising Deglitch VPVCC – VBAT > VPVCC-BAT_RISE 7 9 11 ms PVCC to BAT Falling Deglitch VPVCC – VBAT < VPVCC-BAT_FALL 10 µs INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO) AC Undervoltage rising threshold Measure on PVCC 3.5 4 4.5 V UVLO AC Undervoltage hysteresis, falling 260 mV BAT OVERVOLTAGE COMPARATOR Overvoltage rising threshold (1) 104% VO As percentage of VBAT_REG Overvoltage falling threshold (1) 102% CHARGE OVERCURRENT COMPARATOR VOC Charge overcurrent falling threshold As percentage of IREG_CHG 145% Minimum Current Limit (SRP-SRN) 50 mV THERMAL SHUTDOWN COMPARATOR TSHUT Thermal shutdown rising temperature Temperature Increasing 155 °C TSHUT_HYS Thermal shutdown hysteresis, falling 20 PWM HIGH SIDE DRIVER (HIDRV) High side driver turn-on resistance VBTST – VPH = 5.5 V, tested at 100 mA 3 6 RDS(on) Ω High side driver turn-off resistance VBTST – VPH = 5.5 V, tested at 100 mA 0.7 1.4 Bootstrap refresh comparator threshold VBTST – VPH when low side refresh VBTST_REFRESH 4 V voltage pulse is requested (1) Specified by design. Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s) :bq24705 Not Recommended for New Designs |
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