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BQ27750 Datasheet(PDF) 7 Page - Texas Instruments

Part # BQ27750
Description  Impedance Track Battery Gas Gauge and Protection Solution for 1-Series Cell Li-Ion Battery Packs
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ27750 Datasheet(HTML) 7 Page - Texas Instruments

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7
bq27750
www.ti.com
SLUSCM7 – JUNE 2017
Product Folder Links: bq27750
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Copyright © 2017, Texas Instruments Incorporated
Coulomb Counter (continued)
Typical values stated where TA = 25ºC, Min/Max values stated where TA = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
Gain error
15-bit + sign, Over input voltage range
±131
±492
LSB
Gain error drift
15-bit + sign, Over input voltage range
4.3
9.8
LSB/°C
Effective input resistance
2.5
6.12 ADC Digital Filter
Typical values stated where TA = 25ºC, Min/Max values stated where TA = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
tCONV
ADCTL[SPEED1, SPEED0] = 0, 0
31.25
ms
ADCTL[SPEED1, SPEED0] = 0, 1
15.63
ADCTL[SPEED1, SPEED0] = 1, 0
7.81
ADCTL[SPEED1, SPEED0] = 1, 1
1.95
Resolution
No missing codes, ADCTL[SPEED1, SPEED0] =
0, 0
16
Bits
Effective resolution
With sign, ADCTL[SPEED1, SPEED0] = 0, 0
14
15
Bits
With sign, ADCTL[SPEED1, SPEED0] = 0, 1
13
14
With sign, ADCTL[SPEED1, SPEED0] = 1, 0
11
12
With sign, ADCTL[SPEED1, SPEED0] = 1, 1
9
10
6.13 ADC Multiplexer
Typical values stated where TA = 25ºC, Min/Max values stated where TA = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
K
Scaling factor
VCELL/INT–VSS, BAT–VCELL/INT
0.1980
0.2000
0.2020
BAT–VSS, PACK–VSS
0.0485
0.050
0.051
VREF1/2
0.490
0.500
0.510
VIN
Input voltage range
BAT–VSS, PACK–VSS
–0.2
20
V
TS1
–0.2
0.8 × VREF1
TS1
–0.2
0.8 × VREG
ILKG
Input leakage current
VCELL/INT, BAT, cell detach detection off, ADC
multiplexer off
1
µA
(1)
Assured by design
6.14 Internal Temperature Sensor
Typical values stated where TA = 25ºC, Min/Max values stated where TA = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
VTEMP
Internal temperature
sensor voltage drift
VTEMPP
–1.9
–2.0
–2.1
mV/°C
VTEMPP – VTEMPN
(1)
0.177
0.178
0.179
6.15 NTC Thermistor Measurement Support
Typical values stated where TA = 25ºC, Min/Max values stated where TA = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
RNTC(PU)
Internal pull-up
resistance
TS1
14.4
18
21.6
RNTC(DRIFT)
Resistance drift over
temperature
TS1
–360
–280
–200
PPM/°C


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