BQ24170 Datasheet, PDF (13/35 Pages) Texas Instruments – 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

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bq24170
bq24172
SLUSAD2A – NOVEMBER 2010 – REVISED NOVEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
4.5V ≤ V(PVCC, AVCC) ≤ 17V, –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 UNITS
INTERNAL PWM
fsw
PWM Switching Frequency
1360
1600 1840 kHz
t_{SW_DEAD}
Driver Dead Time⁽⁵⁾
Dead time when switching between LSFET and
HSFET no load
30
ns
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=4.5V
V_BTST – V_SW when low side refresh pulse is
requested, V_AVCC>6V
25
45 mΩ
60
110 mΩ
3
V
4
SS_STEP
Soft start steps
8
step
T_{SS_STEP}
Soft start step time
CHARGER SECTION POWER-UP SEQUENCING
1.6
3 ms
t_{CE_DELAY}
Delay from ISET above 120mV to start
charging battery
1.5
s
INTEGRATED BTST DIODE
V_F
Forward Bias Voltage
V_R
Reverse breakdown voltage
LOGIC IO PIN CHARACTERISTICS (STAT1, STAT2, TERM_EN)
I_F=120mA at 25°C
I_R=2uA at 25°C
0.85
V
20
V
V_{OUT_LO}
V_{CELL_LO}
STAT Output Low Saturation Voltage
CELL pin input low threshold, 1 cell
(bq24170)
Sink Current = 5 mA
CELL pin voltage falling edge
0.5
V
0.5
V
V_{CELL_MID}
CELL pin input mid threshold, 2 cells
(bq24170)
CELL pin voltage rising for MIN, falling for MAX
0.8
1.8
V
V_{CELL_HI}
CELL pin input high threshold, 3 cells
(bq24170)
CELL pin voltage rising edge
2.5
V
(5) Specified by design
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): bq24170 bq24172
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