BQ24171_15 Datasheet, PDF (11/39 Pages) Texas Instruments – bq24171 JEITA-Compliant Stand-Alone, Switched-Mode Li-Ion and Li-Polymer Battery Charger With Integrated MOSFETs and Power Path Selector

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bq24171
SLUSAF2C – FEBRUARY 2011 – REVISED APRIL 2015
Electrical Characteristics (continued)
4.5 V ≤ V(PVCC, AVCC) ≤ 17 V, –40°C < T_J + 125°C, typical values are at T_A = 25°C, with respect to AGND (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
BATTERY DETECTION
t_WAKE
I_WAKE
t_DISCHARGE
I_DISCHARGE
I_FAULT
V_WAKE
Wake timer
Wake current
Discharge timer
Discharge current
Fault current after a time-out fault
Wake threshold with respect to V_REG To
detect battery absent during WAKE
Max time charge is enabled
R_SENSE = 10 mΩ
Max time discharge current is applied
Measure on FB
500
50
125
200
1
8
2
50
V_DISCH
Discharge Threshold to detect battery
absent during discharge
Measure on FB
1.45
INTERNAL PWM
fsw
PWM Switching Frequency
1360
1600 1840
t_{SW_DEAD}
Driver Dead Time⁽¹⁾
Dead time when switching between LSFET and
HSFET no load
30
R_{DS_HI}
R_{DS_LO}
V_{BTST_REFRESH}
High-Side MOSFET ON-Resistance
Low-Side MOSFET ON-Resistance
Bootstrap Refresh Comparator Threshold
Voltage
INTERNAL SOFT START (8 steps to regulation current ICHG)
V_BTST – V_SW = 4.5 V
V_BTST – V_SW when low-side refresh pulse is
requested, V_AVCC = 4.5 V
V_BTST – V_SW when low-side refresh pulse is
requested, V_AVCC > 6 V
25
45
60
110
3
4
SS_STEP
Soft start steps
8
T_{SS_STEP}
Soft start step time
CHARGER SECTION POWER-UP SEQUENCING
1.6
3
t_{CE_DELAY}
Delay from ISET above 120 mV to start
charging battery
1.5
INTEGRATED BTST DIODE
V_F
Forward Bias Voltage
V_R
Reverse breakdown voltage
LOGIC IO PIN CHARACTERISTICS
I_F = 120 mA at 25°C
I_R = 2 µA at 25°C
0.85
20
V_{OUT_LO}
STAT Output Low Saturation Voltage
Sink Current = 5 mA
0.5
UNIT
ms
mA
sec
mA
mA
mV
V
kHz
ns
mΩ
mΩ
V
step
ms
s
V
V
V
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