Datasheet

TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011 www.ti.com
Table 8-1. Main Charge Electrical Characteristics
VBAT = 3.6 V, R
S
= 0.22 Ω, unless otherwise specified (continued)
Parameter Test Conditions Min Typ Max Unit
ADCIN1 dc current source for ADCIN1 = 1 V, ITHSENS[2:0] = 000 (maximum MADC 9.5 10 10.5 μA
temperature measurement input voltage = 0.875 V), after TRIM done by
ISRCTRIM[3:0]
ITHSENS[2:0] = 001 14 20 26
ITHSENS[2:0] = 010 21 30 39
ITHSENS[2:0] = 011 28 40 52
ITHSENS[2:0] = 100 35 50 65
ITHSENS[2:0] = 101 42 60 78
ITHSENS[2:0] = 110 49 70 91
ITHSENS[2:0] = 111 56 80 104
Constant current loop After trimming (±1.10%), VAC = 5.4 V or VBUS = 5.0 V, –11% 11%
accuracy VBAT = 3.6 V, CHGIREG = (value relative to I
CHG
= 0.6
A), VCCS–VBATS rising voltage, monitoring ICTLAC1 or
ICTLUSB1, CGAIN = 1, overtemperature (ambient 0°C
to 50°C) (including the bandgap accuracy
overtemperature ±0.5% and the R
sense
resistor accuracy
±1%)
After trimming (±0.55%), VAC = 5.4 V or VBUS = 5.0 V, –3.15% 3.15%
VBAT = 3.6 V, CHGIREG = (value relative to I
CHG
= 0.6
A), VCCS–VBATS rising voltage, monitoring ICTLAC1 or
ICTLUSB1, CGAIN = 0, overtemperature (ambient 0°C
to 50°C) (including the bandgap accuracy
overtemperature ±0.5% and the R
sense
resistor accuracy
±1%)
Constant current loop offset At error amplifier input, before loop trim. Including DAC –46.8 46.8 mV
offset, I-to-V offset after I-to-V trim, error amplifier offset
Constant voltage loop After trimming (±0.14%), VAC = 5.4 V or VBUS = 5.0 V, –0.28% 0.28%
accuracy at room temperature, CHGVREG = (value relative to
VBAT = 4.37 V), VBAT rising voltage, monitoring
ICTLAC1 or ICTLUSB1
After trimming (±0.14%), VAC = 5.4 V or VBUS = 5.0 V –0.82% 0.82%
overtemperature (ambient 0°C to 50°C), CHGVREG =
(value relative to VBAT = 4.37 V), VBAT rising voltage,
monitoring ICTLAC1 or ICTLUSB1 (including the
bandgap accuracy overtemperature ±0.5%)
Charger presence detect VBAT = 3.6 V, rising edge VBAT+0.3 VBAT+0.4 VBAT+0.6 V
threshold
VBAT = 3.6 V, falling edge VBAT VBAT+0.1 VBAT+0.3
Battery threshold when default VAC = 5.4 V or VBUS = 5.0 V, VBATOVEN = 1, 4.45 4.55 4.65 V
value
(3)
VBATOVTH(3:0) = default, MESBAT = 1, VBAT rising
voltage, monitoring VBATOV status signal
ac charger overvoltage VBAT = 3.6 V, VACCHGOVEN = 1, VACCHGOVTH(3:0) 6.24 6.5 7 V
threshold when default = default, VAC rising voltage, monitoring VACCHGOV
value
(3)
status signal
VBUS overvoltage threshold VBAT = 3.6 V, VBUSOVEN = 1, VBUSOVTH(3:0) = 5.28 5.5 5.9 V
when default value
(3)
default, VBUS rising voltage, monitoring VBUSOV status
signal
Main charge main battery Measured through ADCIN1 rising voltage and sourced 67.5 75 82.5 kΩ
presence impedance current, monitoring BATSTS value
detection threshold
Main charge main battery Force ADCIN1 voltage, monitor BATSTS value 750 mV
presence voltage detection
threshold
Temperature detection For low temperature (2°C/3°C) –3 3 °C
accuracy For high temperature (43°C/50°C) –5 5
Battery voltage accuracy Tested for VBAT = 2.9, 3.6, and 4.2 V VBAT–0.1 VBAT VBAT+0.1 V
Current charge accuracy Tested for ICHG = 600 mA ICHG–0.04 ICHG ICHG+0.04 A
(3) Can be changed by programming the associated threshold register
120 Battery Interface Copyright © 2008–2011, Texas Instruments Incorporated
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