BQ28400PWR Datasheet, PDF (7/24 Pages) Texas Instruments – Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection

bq28400
www.ti.com
SLUSA61A – OCTOBER 2010 – REVISED DECEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
Typical values stated where T_A = 25ºC and V_BAT = V_PACK = 7.2 V, Min/Max values stated where T_A = –20ºC to 85ºC and V_BAT
= V_PACK = 3.8 V to 18.75 V over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITION⁽¹⁾
MIN
TYP
MAX
UNIT
SRx Wake from Sleep
V_WAKE = 1.2 mV
V_{WAKE_ACR} Accuracy of V_WAKE
V_WAKE = 2.4 mV
V_WAKE = 5 mV
V_WAKE = 10 mV
V_{WAKE_TCO} Temperature drift of V_WAKE accuracy
t_WAKE
Time from application of current and wake of bq28400
Coulomb Counter
0.2
1.2
2
0.4
2.4
3.6
mV
2
5
6.8
5.3
10
13
0.5
%/°C
0.2
1
ms
Input voltage range
–0.20
0.25
V
Conversion time
Single conversion
250
ms
Effective resolution Single conversion
15
Bits
Integral nonlinearity
Offset error ⁽³⁾
Offset error drift
Full-scale error ⁽⁴⁾
T_A = –20 to 85°C
T_A = –20 to 85°C
–0.8%
±0.007
10
0.3
0.2%
±0.034
0.5
0.8%
%FSR
µV
µV/°C
Full-scale error drift
150 PPM/°C
Effective input
resistance
ADC enabled
2.5
MΩ
ADC
Input voltage range for TS1
Conversion time
–0.2
0.8 x
V
V_REG27
31.5
ms
Resolution (no missing codes)
16
Bits
Effective resolution
15
Bits
Integral nonlinearity
Offset error ⁽⁵⁾
–0.1 V to 0.8 x V_ref
±0.020 %FSR
70
160
µV
Offset error drift
25
µV/°C
Full-scale error
Full –scale error drift
V_IN = 1 V
–0.8%
±0.2%
0.4%
150
PPM/°C
Effective input resistance
8
MΩ
External Cell Balance Drive
R_{BAL_drive}
Internal pull-down
resistance for external
cell balance
Cell balance ON for VC1, VCx – VCx + 4 V,
where x = 1 to 2
Cell balance ON for VC2, VCx – VCx + 4 V,
where x = 1 to 2
3.7
kΩ
1.75
Cell Voltage Monitor
CELL Voltage
Measurement
Accuracy
T_A = –10ºC to 60ºC
T_A = –20ºC to 85ºC
±10
±20
±10
±35
mV
(3) Post-Calibration Performance
(4) Uncalibrated performance. This gain error can be eliminated with external calibration.
(5) Channel to Channel Offset
Copyright © 2010, Texas Instruments Incorporated
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