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BQ24258 Datasheet(PDF) 7 Page - Texas Instruments |
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BQ24258 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 45 page  bq24257 bq24258 www.ti.com SLUSBG0B – FEBRUARY 2013 – REVISED JULY 2013 ELECTRICAL CHARACTERISTICS (continued) bq24257 App Circuit, VUVLO < VIN < VOVP AND VIN > VBAT+VSLP, TJ = 0°C – 125°C and TJ = 25°C for typical values (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Deglitch time for IN Rising above tDGL(OVP) IN rising voltage, tRISE = 100ns 32 ms VOVP VBAT threshold over VBATREG to turn off Battery OVP threshold voltage 102.5 105 107.5 % VBATREG charger during charge VBOVP Lower limit for VBAT falling from above VBATOVP hysteresis 1 VBOVP tDGL(BOVP) BOVP Deglitch Battery entering/exiting BOVP 1 ms PWM CONVERTER Internal blocking MOSFET on- Measured from IN to PMID (WCSP and RON(BLK) 60 100 m Ω resistance QFN) Internal high-side MOSFET on- Measured from IN to SW (WCSP and RON(HS) 100 150 m Ω resistance QFN) Internal low-side MOSFET on- Measured from SW to PGND (WCSP and RON(LS) 110 165 m Ω resistance QFN) ICbC Cycle-by-cycle current limit VSYS shorted 2.6 3.2 3.8 A fOSC Oscillator frequency 2.7 3 3.3 MHz DMAX Maximum duty cycle 95% DMIN Minimum duty cycle 0% Thermal trip 150 TSHTDWN Thermal hysteresis 10 °C TREG Thermal regulation threshold Charge current begins to cut off 125 LDO VLDO LDO Output Voltage VIN = 5.5V, ILDO = 0 to 50 mA 4.65 4.85 5.04 V ILDO Maximum LDO Output Current 50 mA VLDO LDO Dropout Voltage (VIN – VLDO) VIN = 5 V, ILDO = 50 mA 200 300 mV BATTERY-PACK NTC MONITOR VHOT High temperature threshold VTS falling 29.6 30 30.4 %VLDO VHYS(HOT) Hysteresis on high threshold VTS rising 1 VWARM Warm temperature threshold VTS falling 37.9 38.3 38.7 %VLDO Hysteresis on warm temperature VHYS(WARM) VTS rising 1 threshold VCOOL Cool temperature threshold VTS rising 56.5 56.5 56.9 %VLDO Hysteresis on cool temperature VHSY(COOL) VTS falling 1 threshold VCOLD Low temperature threshold VTS rising 59.6 60 60.4 %VLDO VHYS(COLD) Hysteresis on low threshold VTS falling 1 VTS_DIS TS disable threshold 70 73 %VLDO tDGL(TS) Deglitch time on TS change 32 ms INPUTS (DBP, EN1, EN2, EN3, CE, SCL, SDA) VIH Input high threshold 1 V VIL Input low threshold 0.4 V STATUS OUTPUTS (STAT, PG, CHG) VOL Low-level output saturation voltage IO = 5 mA, sink current 0.4 V IIH High-level leakage current Hi-Z and 5 V applies 1 uA TIMERS tSAFETY 45 min safety timer 2700 s 6 hr safety timer 21600 s 9 hr safety timer 32400 s tWATCH-DOG Watch dog timer 50 s Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: bq24257 bq24258 |
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