BQ27750 Datasheet, PDF (7/34 Pages) Texas Instruments – Impedance Track Battery Gas Gauge and Protection Solution for 1-Series Cell Li-Ion Battery Packs

www.ti.com
bq27750
SLUSCM7 – JUNE 2017
Coulomb Counter (continued)
Typical values stated where T_A = 25ºC, Min/Max values stated where T_A = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN TYP
MAX
Gain error
15-bit + sign, Over input voltage range
±131
±492
Gain error drift
15-bit + sign, Over input voltage range
4.3
9.8
Effective input resistance
2.5
UNIT
LSB
LSB/°C
MΩ
6.12 ADC Digital Filter
Typical values stated where T_A = 25ºC, Min/Max values stated where T_A = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
ADCTL[SPEED1, SPEED0] = 0, 0
31.25
t_CONV
ADCTL[SPEED1, SPEED0] = 0, 1
ADCTL[SPEED1, SPEED0] = 1, 0
15.63
7.81
ADCTL[SPEED1, SPEED0] = 1, 1
1.95
Resolution
No missing codes, ADCTL[SPEED1, SPEED0] =
0, 0
16
With sign, ADCTL[SPEED1, SPEED0] = 0, 0
14
15
Effective resolution
With sign, ADCTL[SPEED1, SPEED0] = 0, 1
With sign, ADCTL[SPEED1, SPEED0] = 1, 0
13
14
11
12
With sign, ADCTL[SPEED1, SPEED0] = 1, 1
9
10
UNIT
ms
Bits
Bits
6.13 ADC Multiplexer
Typical values stated where T_A = 25ºC, Min/Max values stated where T_A = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
VCELL/INT–VSS, BAT–VCELL/INT
0.1980 0.2000
0.2020
K
Scaling factor
BAT–VSS, PACK–VSS
0.0485 0.050
0.051
V_REF1/2
BAT–VSS, PACK–VSS
0.490
–0.2
0.500
0.510
20
V_IN
Input voltage range
TS1
–0.2
TS1
–0.2
I_LKG
Input leakage current
VCELL/INT, BAT, cell detach detection off, ADC
multiplexer off
0.8 × V_REF1
0.8 × V_REG
1
UNIT
—
V
µA
6.14 Internal Temperature Sensor
Typical values stated where T_A = 25ºC, Min/Max values stated where T_A = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
V_TEMP
Internal temperature
sensor voltage drift
V_TEMPP
V_TEMPP – V_TEMPN ⁽¹⁾
–1.9
0.177
–2.0
0.178
–2.1
0.179
(1) Assured by design
UNIT
mV/°C
6.15 NTC Thermistor Measurement Support
Typical values stated where T_A = 25ºC, Min/Max values stated where T_A = –40ºC to 85ºC (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX UNIT
R_NTC(PU)
Internal pull-up
resistance
TS1
14.4
18
21.6 kΩ
R_NTC(DRIFT)
Resistance drift over
temperature
TS1
–360
–280
–200 PPM/°C
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: bq27750
Submit Documentation Feedback
7