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BQ24730RGFT4 Datasheet(PDF) 6 Page - Texas Instruments |
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BQ24730RGFT4 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 37 page www.ti.com bq24730 SLUS695 – MARCH 2006 ELECTRICAL CHARACTERISTICS (continued) 8 Vdc ≤ V (VCC) ≤ 24 Vdc, 0°C ≤ TJ ≤ 125°C, all voltages with respect to AGND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT CURRENT SENSE AMPLIFIER - IADAPT AMPLIFIER ACP, ACN Common-mode input 0 24 V voltage range V(IADAPT) V(IADAPT) = V(ACP, ACN)× G(IADAPT) IADAPT output voltage range 0 3.5 V V(SRP) > 2.5 V or V(SRP) > V(IADAPT) + 1 V G(IADAPT) Voltage gain G(IADAPT) = V(IADAPT)/ V(ACP, ACN) 20 V/V V(ACP) – V(ACN) = 40 mV –2% 2% (4 A with 10 m Ω) Adapter current sense amplifier V(BAT) > 2.5 V or V(BAT) > V(ACP) – V(ACN) = 20 mV –3% 3% output voltageaccuracy V(IADAPT) + V(DO-MAX)(1) (2 A with 10 m Ω) V(ACP) – V(ACN) = 5 mV –25% 25% (0.5 A with 10 m Ω) I(ADAPT_LIM) IADAPT output current limit IADAPT shorted to AGND 4.5 mA OPERATING CONDITIONS V(VCC), V(PVCC), input voltage operating Selector and charger operational. 8 24 V range QUIESCENT CURRENT – NO ADAPTER CONNECTED I(VCC,PVCC) VCC and PVCC quiescent current I(VCC,PVCC) = ( I(VCC) + I(PVCC) ) at V(VCC) = V(PVCC) = 16.8 V 254 µA I(ACP,ACN) ACP and ACN quiescent current I(ACP,ACN) = ( I(ACP) + I(ACN) ) at V(ACP) = V(ACN) = V(VCC) = V(PVCC) = 16.8 V 1 µA I(BAT) BAT quiescent current I(BAT) at V(BAT) = V(VCC) = V(PVCC) = 16.8 V 17 µA I(SRP,SRN) SRP and SRN quiescent current I(SRP,SRN) = ( I(SRP) + I(SRN) ) at V(SRP) = V(SRN) = V(VCC) = V(PVCC) = 16.8 V 1 µA I(SYNN,SYNP) SYNN and SYNP quiescent current I(SYNN,SYNP) = ( I(SYNN) + I(SYNP) ) at V(SYNP) = V(SYNN) = V(VCC) = V(PVCC) = 16.8 V 1 µA I(SYS) SYS quiescent current I(SYS) at V(SYS) = V(VCC) = V(PVCC) = 16.8 V 25 µA I(PH) PH quiescent current I(PH) at V(PH) = V(VCC) = V(PVCC) = 16.8 V 1 µA I(BTST) BTST quiescent current I(BTST) at V(BTST) = V(VCC) = V(PVCC) = 16.8 V 1 µA QUIESCENT CURRENT – ADAPTER CONNECTED AND READY TO CHARGE VCC and PVCC quiescent current, I(VCC,PVCC) = (I(VCC) + I(PVCC) at V(VCC) = V(PVCC) = 16.8 V, charger off (CHGEN = I(VCC,PVCC) 4.45 mA while converter is not switching HI) = DISABLED I(VCC_SW) = I(VCC) FPWM = 300 kHz, charger on (CHGEN = LO) = ENABLED VCC Current while converter is I(VCC_SW) Q(G) at HIDRV = Q(G) at LODRV = 30 nC, [No Load on VREF5] 25 mA switching including gate drive current Gate drive switching current = Q(G)× FPWM = (30 nC + 30 nC) × 300kHz = 18 mA 5-V REFERENCE LDO VOLTAGE AND AC DETECTION STATUS (VREF5, TURNS ON WHEN AIRDET DETECTED) Adapter detected (VACDET >V(ACD)), VCC> 7 V VVREF5 5V Regulator output voltage 4.75 5 5.25 V 0 → 10 mA, source current Adapter not detected, (VACDET< V(ACD)) VVREF5_SAT Saturation voltage when VREF5 is off 0.15 V 0 →– 10 mA, ac adapter inserted, C O = 1 µF, discharge load IVREF5_LIM Short-circuit current V(VREF5) = AGND 20 mA UNDERVOLTAGE LOCKOUT CIRCUIT Undervoltage lockout threshold VREF5 rising, POR mode set at VREF5 < V(UVLO) 3.7 V UVLO V(UVLO) hysteresis VREF5 falling 100 mV CONTROL LOGIC INPUTS (CHGEN, CELLS, IADSPL) VIL Input low threshold level 2.7 V < V(pull-up) < 5.5 V 0.8 V VIH Input high threshold level 2.7 V < V(pull-up) < 5.5 V 2.1 V Ilkg Leakage current Pin V = 5.5 V 1 µA OPEN DRAIN OUTPUT (ACGOOD, STAT, LOWBAT, DPMDET) V(OL_sat) Output saturation voltage I = 5 mA 0.5 V Ilkg Leakage current V(PULL-UP) = 5 V 1 µA CHARGE OVERCURRENT COMPARATOR V(OLP) Overcurrent protection threshold V(SRP-SRN) rising 190 %I(REG_CHG) V(OLPH) Hysteresis V(SRP-SRN) falling 20 %I(REG_CHG) CHARGE UNDERCURRENT THRESHOLD (SYNCHRONOUS to NONSYNCHRONOUS CURRENT) V(ISYNSET) ISYNSET voltage 1 V G(ISYNSET) ISYNSET gain 500 V/A THERMAL SHUTDOWN T(SHUT) Thermal shutdown threshold TJ rising, Charge disabled at TJ > T(SHUT) 145 °C T(SHUTH) Hysteresis TJ falling, Charge enabled at TJ < T(SHUT)– T(SHUTH) 15 °C Deglitch time, thermal shutdown TJ rising/falling 8 ms 6 Submit Documentation Feedback |
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