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12 page 
BATTERY CHARGER SLVS950 – JULY 2009 ....................................................................................................................................................................................................... www.ti.com PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CHARGER SECTION Battery discharge current 2 A –1% 4.10 1% Depending on setting in CHGCONFIG2 –1% 4.15 1% Vo(BATREG) Battery charger voltage And internal EEPROM V –1% 4.20 1% Default = 4.20V –1% 4.25 1% default = 2.9 V set with 2.9 VLOWV Pre-charge to fast-charge transition threshold V Bit <Precharge Voltage> 2.5 Deglitch time on pre-charge to fast-charge tDGL1(LOWV) 25 ms transition Deglitch time on fast-charge to pre-charge tDGL2(LOWV) 25 ms transition VBAT(REG) > VBAT > VLOWV, VIN = VAC or VUSB = ICHG Battery fast charge current range 100 1500 mA 5 V VBAT > VLOWV, VIN = 5 V, IIN-MAX > ICHG, no ICHG Battery fast charge current load on SYS pin, thermal loop not active, KISET/RISET A DPPM loop not active KISET Fast charge current factor for a charge current of 1500 mA 840 900 1000 A Ω KISET Fast charge current factor for a charge current of 100 mA 930 1100 1200 A Ω 0.08× 0.1× 0.12× IPRECHG Pre-charge current A ICHG ICHG ICHG Charge current value for termination detection 0.08× 0.1× 0.13× ITERM A threshold (internally set) ICHG ICHG ICHG tDGL(TERM) Deglitch time, termination detected 25 ms VRCH Recharge detection threshold Voltage below nominal charger voltage 150 100 65 mV tDGL(RCH) Deglitch time, recharge threshold detected 125 ms VBAT = 3.6V. Time measured from tDGL(NO-IN) Delay time, input power loss to charger turn-off 20 ms VIN: 5V → 3.3V 1 µs fall-time IBAT(DET) Sink current for battery detection 3 10 mA tDET Battery detection timer 250 ms Safety timer range, thermal and DPM not 4 active selectable by I2C with Bits 5 TCHG Charge safety timer –15% 15% <ChargeSafetyTimerValue1> 6 <ChargeSafetyTimerValue0> 8 Pre charge timer range, thermal and 25 30 35 TPRECHG Precharge timer DPM/DPPM loops not active scalable with min 50 60 70 <Precharge Time> Maximum value for pre-charge safety timer, TPCHGADD Pre-charge safety timer “add-on” time range 0 2×TCHG h thermal, DPM or DPPM loops always active BATTERY-PACK NTC MONITOR 10 k curve 2 NTC –2% 7.35 2% k Ω Pull-up resistor from thermistor to Internal LDO . RT1 I2C selectable 100 k curve 1 NTC –2% 62.5 2% k Ω VHOT High temperature trip point (set to 45°C) Battery charging 860 mV VHYS(HOT) Hysteresis on high trip point (set to 3°C) Battery charging 50 mV VCOLD Low temperature trip point (set to 0°C) Battery charging 1660 mV VHYS(COLD) Hysteresis on low trip point (set to 3°C) Battery charging 50 mV VnoNTC No NTC detected NTC error 2000 mV Deglitch time for thermistor detection after THRMDLY 3 ms thermistor power on tDGL(TS) Deglitch time, pack temperature fault detection Battery charging 50 ms 12 Copyright © 2009, Texas Instruments Incorporated |
