Datasheet

Not Recommended for New Designs
bq24725
www.ti.com SLUS702A –JULY 2010–REVISED NOVEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
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
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
I
CHRG_REG_ACC
ChargeCurrent() = 0x0200H
10mΩ 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 1.6 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
REGN REGULATOR
V
REGN_REG
REGN regulator voltage V
VCC
> 6.5V, V
ACDET
> 0.6V (0-55mA load) 5.5 6 6.5 V
V
REGN
= 0V, V
VCC
> UVLO charge enabled and not in 65 80
mA
TSHUT
I
REGN_LIM
REGN current limit
V
REGN
= 0V, V
VCC
> UVLO charge disabled or in 7 16
mA
TSHUT
REGN Output Capacitor Required for I
LOAD
= 100µA to 65mA 1
C
REGN
µF
Stability
INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO)
Under voltage rising threshold V
VCC
rising 3.5 3.75 4 V
UVLO
Under voltage hysteresis, falling V
VCC
falling 340 mV
Fast DPM comparator (FAST_DPM)
Fast DPM comparator stop charging rising threshold with respect to input current limit, voltage
V
FAST_DPM
108%
across input sense resistor rising edge (Specified by design)
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