BQ24735 Datasheet, PDF (6/42 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode with N-Channel Power MOSFET Selector

bq24735
SLUSAK9 – SEPTEMBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS
4.5 V ≤ V_VCC ≤ 24 V, 0°C ≤ T_J ≤ 125°C, typical values are at T_A = 25°C, with respect to GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
OPERATING CONDITIONS
V_{VCC_OP}
VCC Input voltage operating range
CHARGE VOLTAGE REGULATION
4.5
24
V_{BAT_REG_RNG}
Battery voltage range
ChargeVoltage() = 0x41A0H
1.024
16.716
-0.5%
19.2
16.8 16.884
0.5%
V_{BAT_REG_ACC}
Charge voltage regulation accuracy
ChargeVoltage() = 0x3130H
ChargeVoltage() = 0x20D0H
12.529
–0.5%
8.350
–0.6%
12.592
8.4
12.655
0.5%
8.45
0.6%
ChargeVoltage() = 0x1060H
4.163
–0.7%
4.192
4.221
0.7%
CHARGE CURRENT REGULATION
V_{IREG_CHG_RNG}
Charge current regulation differential
voltage range
V_{IREG_CHG} = V_SRP - V_SRN
0
81.28
ChargeCurrent() = 0x1000H
3973
–3%
4096
4219
3%
ChargeCurrent() = 0x0800H
1946
–5%
2048
2150
5%
I_{CHRG_REG_ACC}
Charge current regulation accuracy 10mΩ
current sensing resistor
ChargeCurrent() = 0x0200H
410
–20%
512
614
20%
ChargeCurrent() = 0x0100H
172
–33%
256
340
33%
ChargeCurrent() = 0x0080H
64
–50%
128
192
50%
INPUT CURRENT REGULATION
V_{IREG_DPM_RNG}
Input current regulation differential voltage
range
V_{IREG_DPM} = V_ACP – V_ACN
0
80.64
InputCurrent() = 0x1000H
3973
–3%
4096
4219
3%
I_{DPM_REG_ACC}
Input current regulation accuracy 10mΩ
current sensing resistor
InputCurrent() = 0x0800H
InputCurrent() = 0x0400H
1946
–5%
870
–15%
2048
1024
2150
5%
1178
15%
InputCurrent() = 0x0200H
384
–25%
512
640
25%
INPUT CURRENT OR CHARGE CURRENT SENSE AMPLIFIER
V_{ACP/N_OP}
V_{SRP/N_OP}
V_IOUT
I_IOUT
A_IOUT
V_{IOUT_ACC}
C_{IOUT_MAX}
Input common mode range
Output common mode range
IOUT output voltage range
IOUT output current
Current sense amplifier gain
Current sense output accuracy
Maximum output load capacitance
Voltage on ACP/ACN
Voltage on SRP/SRN
V_(ICOUT)/V_(SRP-SRN) or V_(ACP-ACN)
V_(SRP-SRN) or V_(ACP-ACN) = 40.96mV
V_(SRP-SRN) or V_(ACP-ACN) = 20.48mV
V_(SRP-SRN) or V_(ACP-ACN) = 10.24mV
V_(SRP-SRN) or V_(ACP-ACN) = 5.12mV
V_(SRP-SRN) or V_(ACP-ACN) = 2.56mV
V_(SRP-SRN) or V_(ACP-ACN) = 1.28mV
For stability with 0 to 1mA load
4.5
0
0
0
–2%
–4%
–15%
–20%
–33%
–50%
24
19.2
3.3
1
20
2%
4%
15%
20%
33%
50%
100
UNIT
V
V
V
V
V
V
mV
mA
mA
mA
mA
mA
mV
mA
mA
mA
mA
V
V
V
mA
V/V
pF
6
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