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BQ24140 Datasheet(PDF) 7 Page - Texas Instruments |
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BQ24140 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 39 page  bq24140 www.ti.com SLUSAO5 – OCTOBER 2011 ELECTRICAL CHARACTERISTICS (continued) Circuit of Figure 1, VBUS = 5V, HZ_MODE=0, OPA_MODE=0, CD=0, TJ = –40°C–125°C and TJ = 25°C for typical values PARAMETER TEST CONDITIONS MIN TYP MAX UNIT BOOST MODE OPERATION FOR VBUS (OPA_MODE=1, HZ_MODE=0, VBUS input only) VBUS_BOOST Boost output voltage (to VBUS pin) 2.5 V < VVBAT < 4.5 V 5.05 V Boost output voltage accuracy Including line and load regulation -3% +3% IBOOST Maximum output current for boost VBUS = 5.05 V, 2.5 V < VVBAT < 4.5 V 650 mA IBLIMIT Cycle by cycle current limit for boost VBUS = 5.05 V, 2.5 V < VVBAT < 4.5 V 1.0 A Over voltage protection threshold for VBUSOVP Threshold over VBUS to turn off converter during boost 5.8 6.0 6.2 V boost (VBUS pin) VBUSOVP hysteresis VBUS falling from above VBUSOVP 162 mV Maximum battery voltage for boost (VBAT VBATMAX VVBAT rising edge during boost 4.65 4.75 4.85 V pin) VBATMAX hysteresis VVBAT falling from above VBATMAX 70 mV During boosting 2.3 Minimum battery voltage for boost (VBAT VBATMIN V pin) Before boost starts 2.8 2.97 Boost output resistance at high-impedance mode (From VBUS to CD = 1 or HZ_MODE = 1 500 k Ω PGND) ICC_BOOS Operation quiescent current in boost No load at VBUS, power save mode, VVBAT = 4 V, boosting 650 µA T mode PROTECTION TSHTDWN Thermal trip 165 °C Thermal hysteresis 10 °C TCF Thermal regulation threshold Charge current begins to taper down 120 °C T32S Time constant for the 32-second timer 32 second mode 15 32 S T15M Time constant for the 15-minute timer 15 minute mode 12 15 Minute VREG VREG VREG Regulator ILOAD = 1mA, CREG = 0.1µF, VIN > VUVLO 2.34 2.6 2.86 V ILIM VREG Current limit VREG VREG = 0V 10 mA Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): bq24140 |
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