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bq24747RHDT Datasheet(PDF) 8 Page - Texas Instruments |
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bq24747RHDT Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 36 page  bq24747 SLUS988 – OCTOBER 2009 ............................................................................................................................................................................................. www.ti.com ELECTRICAL CHARACTERISTICS (continued) 7.0 V ≤ V(DCIN) ≤ 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 THERMAL SHUTDOWN COMPARATOR VLOWV_VFB comparator 4 V Reset time CE after falling-edge on-shot 2 ms TSHUT Thermal shutdown rising temperature Temperature Increasing 155 °C TSHUT_HYS Thermal shutdown hysteresis, falling 20 PWM HIGH SIDE DRIVER (UGATE) RDS_HI_ON High side driver (HSD) turn-on resistance VBOOT – VPHASE = 5.5 V 6 Ω RDS_HI_OFF High side driver turn-off resistance VBOOT – VPHASE = 5.5 V 1 Ω Bootstrap refresh comparator threshold VBOOT – VPHASE when low side refresh pulse VBOOT_REFRESH 4 V voltage is requested IBOOT_LEAK BOOT leakage current when charge enabled High Side is on; Charge enabled 200 μA PWM LOW SIDE DRIVER (LGATE) RDS_LO_ON Low side driver (LSD) turn-on resistance 6 Ω RDS_LO_OFF Low side driver turn-off resistance 1 Ω PWM DRIVERS TIMING Dead time when switching between LGATE Driver Dead Time 30 ns and UGATE , no load at LGATE and UGATE PWM OSCILLATOR FSW PWM switching frequency 240 360 kHz VRAMP_HEIGHT PWM ramp height As percentage of DCIN 6.67 %DCIN QUIESCENT CURRENT Total off-state battery current from CSOP, VVFB = 16.8 V, VACIN < 0.6 V, IOFF_STATE 7 10 μA CSON, VFB, DCIN, BOOT, PHASE, etc VDCIN > 5 V, 0°C ≤ TJ ≤ 85°C VVFB = 16.8 V, 0.6V < VACIN < 2.4 V, IBAT_ON Battery on-state quiescent current 0.7 1 mA VDCIN > 5 V Charge is disabled: VVFB = 16.8 V, IBAT_LOAD_CD Internal battery load current, charge disabled 0.7 1 mA VACIN > 2.4 V, VDCIN > 5 V Charge is enabled: VVFB = 16.8 V, IBAT_LOAD_CE Internal battery load current, charge enabled 6 10 12 mA VACIN > 2.4 V, VDCIN > 5 V IAC Adapter quiescent current Charge disabled, VDCIN = 20 V 0.7 1 mA Charge enabled, VDCIN = 20 V, converter IAC_SWITCH Adapter switching quiescent current 25 mA running INTERNAL SOFT START (8 steps to regulation current ICHG) Soft start steps 8 step Soft start step time 1.5 ms CHARGER SECTION POWER-UP SEQUENCING Delay from when adapter is detected to when Charge-Enable Delay after Power-up 1.5 ms the charger is allowed to turn on CHARGE UNDERCURRENT COMPARATOR (CYCLE-BY-CYCLE SYNCHRONOUS TO NON-SYNCHRONOUS) Cycle-by-cycle, (CSOP-CSON) voltage, Cycle-by-cycle Synchronous to VUCP falling, LGATE turns-off and latches off until 5 10 15 mV Non-Synchronous Transition Threshold next cycle Blankout Time after LGATE turns-on Blankout comparator after LGATE turns-on 100 ns LOGIC INPUT PIN CHARACTERISTICS (CE)(2) Pull-up CE with ≥2.2 kΩ resistor or directly to VREF. VIN_LO Input low threshold voltage 0.8 V VIN_HI Input high threshold voltage 2.1 VBIAS Input bias current V = 0 TO VVDDP 1 μA OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (ACOK, ICOUT) VOUT_LO Output low saturation voltage Sink Current = 5 mA 0.5 V (2) Pull up CE with ≥ 2 kΩ resistor, or connect directly to VREF. 8 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq24747 |
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