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BQ24750ARHDT Datasheet(PDF) 9 Page - Texas Instruments |
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BQ24750ARHDT Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 39 page  bq24750A www.ti.com....................................................................................................................................................................................................... SLUS834 – JULY 2008 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 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 V/BATDRV_REG BATFET drive voltage 6.5 V VACN > 5 V and BATFET is on Delay to turn off BATFET after adapter is BATFET Power-up delay 518 700 908 ms detected (after ACDET > 2.4) AC SWITCH (ACDRV) DRIVER RDS(off)_AC ACFET turn-off resistance VPVCC > 5 V 80 Ω RDS(on)_AC ACFET turn-on resistance VPVCC > 5 V 2.5 k Ω V/ACDRV_REG = VPVCC – V/ACDRV when V/ACDRV_REG ACFET drive voltage 6.5 V VPVCC > 5 V and ACFET is on Delay to turn on ACFET after adapter is ACFET Power-up Delay 518 700 908 ms detected (after ACDET > 2.4) AC / BAT MOSFET DRIVERS TIMING Dead time when switching between Driver dead time 10 µs ACDRV and BATDRV PWM HIGH SIDE DRIVER (HIDRV) High side driver (HSD) turn-on RDS(on)_HI VBTST – VPH = 5.5 V, tested at 100 mA 3 6 Ω resistance RDS(off)_HI High side driver turn-off resistance VBTST – VPH = 5.5 V, tested at 100 mA 0.7 1.4 Ω Bootstrap refresh comparator VBTST – VPH when low side refresh pulse VBTST_REFRESH 4 V threshold voltage is requested PWM LOW SIDE DRIVER (LODRV) Low side driver (LSD) turn-on RDS(on)_LO REGN = 6 V, tested at 100 mA 3 6 Ω resistance RDS(off)_LO Low side driver turn-off resistance REGN = 6 V, tested at 100 mA 0.6 1.2 Ω PWM DRIVERS TIMING Driver Dead Time — Dead time when switching between LODRV 30 ns and HIDRV. No load at LODRV and HIDRV PWM OSCILLATOR FSW PWM switching frequency 240 300 360 kHz VRAMP_HEIGHT PWM ramp height As percentage of PVCC 6.6 %PVCC QUIESCENT CURRENT Total off-state quiescent current into VBAT = 16.8 V, VACDET < 0.6 V, IOFF_STATE pins: SRP, SRN, BAT, BTST, PH, 7 10 µA VPVCC > 5 V, TJ = 0 to 85°C PVCC, ACP, ACN IAC Adapter quiescent current VPVCC = 20 V, charge disabled 1 1.5 mA Total quiescent current into pins: Adapter present, VACDET>2.4V, charge IBATQ_CD 100 200 µA SRP, SRN, BAT, BTST, PH disabled INTERNAL SOFT START (8 steps to regulation current) Soft start steps 8 step Soft start step time 1.7 ms CHARGER SECTION POWER-UP SEQUENCING Delay from when adapter is detected to Charge-enable delay after power-up 518 700 908 ms when the charger is allowed to turn on Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s) :bq24750A |
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