BQ40Z50 Datasheet, PDF (9/30 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

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SLUSBS8 – DECEMBER 2013
AFE POWER-ON RESET
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
V_REGIT–
V_HYS
t_RST
PARAMETER
Negative-going
voltage input
Power-on reset
hysteresis
Power-on reset
time
V_REG
TEST CONDITION
V_REGIT+ – V_REGIT–
MIN
TYP
MAX
UNIT
1.51
1.55
1.59
V
70
100
130
mV
200
300
400
µs
AFE WATCHDOG RESET AND WAKE TIMER
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
t_WDT
t_WAKE
t_FETOFF
PARAMETER
AFE watchdog
timeout
AFE wake timer
FET off delay after
reset
t_WDT = 500
t_WDT = 1000
t_WDT = 2000
t_WDT = 4000
t_WAKE = 250
t_WAKE = 500
t_WAKE = 1000
t_WAKE = 512
t_FETOFF = 512
TEST CONDITION
MIN
372
744
1488
2976
186
372
744
1488
409
TYP
500
1000
2000
4000
250
500
1000
2000
512
MAX
628
1256
2512
5024
314
628
1256
2512
614
UNIT
ms
ms
ms
CURRENT WAKE COMPARATOR
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
V_WAKE
Wake voltage
threshold
V_WAKE(DRIFT)
t_WAKE
t_WAKE(SU)
Temperature drift
of V_WAKE accuracy
Time from
application of
current to wake
interrupt
Wake comparator
startup time
TEST CONDITION
V_WAKE = ±0.625 mV
V_WAKE = ±1.25 mV
V_WAKE = ±2.5 mV
V_WAKE = ±5 mV
MIN
TYP
MAX
±0.3 ±0.625 ±0.9
±0.6
±1.25
±1.8
±1.2
±2.5
±3.6
±2.4
±5.0
±7.2
0.5
UNIT
mV
%/°C
700
µs
500
1000
µs
VC1, VC2, VC3, VC4, BAT, PACK
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
K
Scaling factor
TEST CONDITION
VC1–VSS, VC2–VC1, VC3–VC2, VC4–VC3
BAT–VSS, PACK–VSS
V_REF2
MIN
0.1980
0.049
0.490
TYP
0.2000
0.050
0.500
MAX
0.2020
0.051
0.510
UNIT
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