Datasheet

bq24725A
SLUSAL0 –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 UNIT
OPERATING CONDITIONS
V
VCC_OP
VCC Input voltage operating range 4.5 24 V
CHARGE VOLTAGE REGULATION
V
BAT_REG_RNG
Battery voltage range 1.024 19.2 V
16.716 16.8 16.884 V
ChargeVoltage() = 0x41A0H
-0.5% 0.5%
12.529 12.592 12.655 V
ChargeVoltage() = 0x3130H
–0.5% 0.5%
V
BAT_REG_ACC
Charge voltage regulation accuracy
8.350 8.4 8.45 V
ChargeVoltage() = 0x20D0H
–0.6% 0.6%
4.163 4.192 4.221 V
ChargeVoltage() = 0x1060H
–0.7% 0.7%
CHARGE CURRENT REGULATION
Charge current regulation differential
V
IREG_CHG_RNG
V
IREG_CHG
= V
SRP
- V
SRN
0 81.28 mV
voltage range
3973 4096 4219 mA
ChargeCurrent() = 0x1000H
–3% 3%
1946 2048 2150 mA
ChargeCurrent() = 0x0800H
–5% 5%
410 512 614 mA
Charge current regulation accuracy 10mΩ
I
CHRG_REG_ACC
ChargeCurrent() = 0x0200H
current sensing resistor
–20% 20%
172 256 340 mA
ChargeCurrent() = 0x0100H
–33% 33%
64 128 192 mA
ChargeCurrent() = 0x0080H
–50% 50%
INPUT CURRENT REGULATION
Input current regulation differential voltage
V
IREG_DPM_RNG
V
IREG_DPM
= V
ACP
– V
ACN
0 80.64 mV
range
3973 4096 4219 mA
InputCurrent() = 0x1000H
–3% 3%
1946 2048 2150 mA
InputCurrent() = 0x0800H
–5% 5%
Input current regulation accuracy 10mΩ
I
DPM_REG_ACC
current sensing resistor
870 1024 1178 mA
InputCurrent() = 0x0400H
–15% 15%
384 512 640 mA
InputCurrent() = 0x0200H
–25% 25%
INPUT CURRENT OR CHARGE CURRENT SENSE AMPLIFIER
V
ACP/N_OP
Input common mode range Voltage on ACP/ACN 4.5 24 V
V
SRP/N_OP
Output common mode range Voltage on SRP/SRN 0 19.2 V
V
IOUT
IOUT output voltage range 0 3.3 V
I
IOUT
IOUT output current 0 1 mA
A
IOUT
Current sense amplifier gain V
(ICOUT)
/V
(SRP-SRN)
or V
(ACP-ACN)
20 V/V
V
(SRP-SRN)
or V
(ACP-ACN)
= 40.96mV –2% 2%
V
(SRP-SRN)
or V
(ACP-ACN)
= 20.48mV –4% 4%
V
(SRP-SRN)
or V
(ACP-ACN)
= 10.24mV –15% 15%
V
IOUT_ACC
Current sense output accuracy
V
(SRP-SRN)
or V
(ACP-ACN)
= 5.12mV –20% 20%
V
(SRP-SRN)
or V
(ACP-ACN)
= 2.56mV –33% 33%
V
(SRP-SRN)
or V
(ACP-ACN)
= 1.28mV –50% 50%
C
IOUT_MAX
Maximum output load capacitance For stability with 0 to 1mA load 100 pF
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