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BQ76925PWR Datasheet(PDF) 7 Page - Texas Instruments |
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BQ76925PWR Datasheet(HTML) 7 Page - Texas Instruments |
7 / 35 page bq76925 www.ti.com SLUSAM9B – JULY 2011 – REVISED DECEMBER 2011 3.3 V Voltage Regulator PARAMETER TEST CONDITION MIN TYP MAX UNIT 3.3 V VOLTAGE REGULATOR VCTL Regulator control voltage (1)(2) Measured at VCTL, V3P3 regulating 3.3 26.4 V VV3P3 Regulator output Measured at V3P3, IREG = 0 to 4 mA, 3.2 3.3 3.4 V BAT = 4.2 to 26.4 V IREG V3P3 output current 4.0 mA ISC V3P3 short circuit current limit V3P3 = 0.0 V 10.0 17.0 mA VTB Thermistor bias voltage Measured at VTB, ITB = 0 VV3P3 V ITB Thermistor bias current 1.0 mA RTB Thermistor bias internal resistance RDS,ON for internal FET switch, ITB = 1.0 mA 90 130 Ω (1) When a bypass FET is used to supply the regulated 3.3V load current, VCTL automatically adjusts to keep V3P3 = 3.3 V. Note that VCTL,MIN and the FET VGS will determine the minimum BAT voltage at which the bypass FET will operate. (2) If VCTL is tied to BAT, the load current is supplied through V3P3. Voltage Reference PARAMETER TEST CONDITION MIN TYP MAX UNIT VOLTAGE REFERENCE Before gain correction, TA = 25°C REF_SEL = 0 1.44 1.56 V REF_SEL = 1 2.88 3.12 VREF Voltage reference output After gain correction, (1)TA = 25°C REF_SEL = 0 –0.1% 1.5 +0.1% REF_SEL = 1 –0.1% 3.0 +0.1% VCOUT_SEL = 2 –0.9% 0.5 × +0.9% V VREF Reference calibration VCOUT_SEL = 3 –0.5% 0.85 × +0.5% VREF_CAL Measured at VCOUT voltage VREF (0.85 × VREF) – (0.5 –0.3% 0.35 × +0.3% V × VREF) VREF ∆VREF Voltage reference tolerance TA = 0 – 50°C –40 40 ppm/ °C IREF VREF output current 10 µA (1) Gain correction factor determined at final test and stored in non-volatile storage. Gain correction is applied by Host controller. Cell Voltage Amplifier PARAMETER TEST CONDITION MIN TYP MAX UNIT REF_SEL = 0 –1.6% 0.3 1.5% GVCOUT Cell voltage amplifier gain Measured from VCn to VCOUT REF_SEL = 1 –1.6% 0.6 1.5% OVCOUT Cell voltage amplifier offset Measured from VCn to VCOUT –16 15 mV REF_SEL = 0 1.47 1.5 1.53 V Measured at VCOUT, VCn = 5.0 V VCOUT Cell voltage amp output range (1) REF_SEL = 1 2.94 3.0 3.06 V Measured at VCOUT, VCn = 0.0 V 0.0 V VCn = 1.4 V to 4.4 V, After TA = 25°C –3 3 correction, (2) TA = 0°C to 50°C –5 5 ∆VCOUT Cell voltage amplifier accuracy mV Measured at VCOUT (3) TA = –25°C to 85°C –8 8 REF_SEL = 1(4) IVCOUT VCOUT output current(5) 10 µA tVCOUT Delay from VCn select to VCOUT Output step of 200 mV. COUT = 0.1 µF 100 µs (1) For VCn values greater than 5.0 V, VCOUT clamps at approximately V3P3. (2) Correction factor determined at final test and stored in non-volatile storage. Correction is applied by Host controller. (3) Output referred. Input referred accuracy is calculated as ∆VCOUT / GVCOUT (e.g. 3 / 0.6 = 5). (4) Correction factors are calibrated for gain of 0.6. Tolerance at gain of 0.3 is approximately doubled. Contact TI for information on devices calibrated to a gain of 0.3. (5) Max DC load for specified accuracy. Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): bq76925 |
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