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BQ24171_15 Datasheet, PDF (8/39 Pages) Texas Instruments – bq24171 JEITA-Compliant Stand-Alone, Switched-Mode Li-Ion and Li-Polymer Battery Charger With Integrated MOSFETs and Power Path Selector
bq24171
SLUSAF2C – FEBRUARY 2011 – REVISED APRIL 2015
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Electrical Characteristics (continued)
4.5 V ≤ V(PVCC, AVCC) ≤ 17 V, –40°C < TJ + 125°C, typical values are at TA = 25°C, with respect to AGND (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
CHARGE TERMINATION
KTERM
Termination current set factor
Termination current regulation accuracy
tTERM_DEG
Deglitch time for termination (both edges)
tQUAL
Termination qualification time
IQUAL
Termination qualification current
INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)
Percentage of fast charge current
VSRP-SRN = 4 mV
VSRP-SRN = 2 mV
VSRN > VRECH and ICHG < ITERM
Discharge current once termination is detected
–25%
–40%
10% (2)
100
250
2
25%
40%
VUVLO
AC undervoltage rising threshold
Measure on AVCC
VUVLO_HYS
AC undervoltage hysteresis, falling
Measure on AVCC
SLEEP COMPARATOR (REVERSE DISCHARGING PROTECTION)
3.4
3.6
3.8
300
VSLEEP
VSLEEP_HYS
tSLEEP_FALL_CD
tSLEEP_FALL_FETOFF
tSLEEP_FALL
SLEEP mode threshold
SLEEP mode hysteresis
SLEEP deglitch to disable charge
SLEEP deglitch to turn off input FETs
Deglitch to enter SLEEP mode, disable
VREF and enter low quiescent mode
VAVCC – VSRN falling
VAVCC – VSRN rising
VAVCC – VSRN falling
VAVCC – VSRN falling
VAVCC – VSRN falling
50
90
150
200
1
5
100
tSLEEP_PWRUP
Deglitch to exit SLEEP mode, and enable
VREF
VAVCC – VSRN rising
30
ACN-SRN COMPARATOR
VACN-SRN
Threshold to turn on BATFET
VACN-SRN_HYS
Hysteresis to turn off BATFET
tBATFETOFF_DEG
Deglitch to turn on BATFET
tBATFETON_DEG
Deglitch to turn off BATFET
BAT LOWV COMPARATOR
VACN-SRN falling
VACN-SRN rising
VACN-SRN falling
VACN-SRN rising
150
220
300
100
2
50
VLOWV
Precharge to fast charge transition
VLOWV_HYS
Fast charge to precharge hysteresis
tpre2fas
VLOWV rising deglitch
tfast2pre
VLOWV falling deglitch
RECHARGE COMPARATOR
Measure on FB
Measure on FB
Delay to start fast charge current
Delay to start precharge current
1.43
1.45 1.47
100
25
25
VRECHG
Recharge Threshold, below regulation
voltage limit, VFB_REG - VFB
tRECH_RISE_DEG
VRECHG rising deglitch
tRECH_FALL_DEG
VRECHG falling deglitch
BAT OVERVOLTAGE COMPARATOR
Measure on FB
VFB decreasing below VRECHG
VFB increasing above VRECHG
35
50
65
10
10
VOV_RISE
VOV_FALL
Overvoltage rising threshold
Overvoltage falling threshold
As percentage of VFB_REG
As percentage of VFB_REG
104%
102%
UNIT
ms
ms
mA
V
mV
mV
mV
ms
ms
ms
ms
mV
mV
ms
µs
V
mV
ms
ms
mV
ms
ms
8
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