bq24735
SLUSAK9 –SEPTEMBER 2011
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ELECTRICAL CHARACTERISTICS (continued)
4.5 V ≤ VVCC ≤ 24 V, 0°C ≤ TJ ≤ 125°C, typical values are at TA = 25°C, with respect to GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
INPUT OVER-CURRENT COMPARATOR (ACOC)(2)
Adapter over current rising threshold with
ChargeOption() bit [1] = 1 (Default)
300%
333%
366%
VACOC
respect to input current limit, voltage
across input sense resistor rising edge
ChargeOption() bit [1] = 0 Disable function
ChargeOption() Bit [1] = 1 (333%),
InputCurrent () = 0x0400H (10.24mV)
VACOC_min
VACOC_max
tACOC_DEG
Min ACOC threshold clamp voltage
Max ACOC threshold clamp voltage
ACOC deglitch time (Specified by design)
40
135
2.3
45
150
4.2
50
165
6.6
mV
mV
ms
ChargeOption() Bit [1] = 1 (333%),
InputCurrent () = 0x1F80H (80.64mV)
Voltage across input sense resistor rising to disable
charge
BAT OVER-VOLTAGE COMPARATOR (BAT_OVP)
VOVP_RISE
Over voltage rising threshold as
percentage of VBAT_REG
VSRN rising
VSRN falling
103%
104%
102%
106%
VOVP_FALL
Over voltage falling threshold as
percentage of VBAT_REG
CHARGE OVER-CURRENT COMPARATOR (CHG_OCP)
ChargeCurrent()=0x0xxxH
54
80
60
90
66
100
130
mV
mV
mV
Charge over current rising threshold,
measure voltage drop across current
sensing resistor
VOCP_RISE
ChargeCurrent()=0x1000H – 0x17C0H
ChargeCurrent()=0x1800 H– 0x1FC0H
110
120
CHARGE UNDER-CURRENT COMPARATOR (CHG_UCP)
VUCP_FALL Charge under-current falling threshold
LIGHT LOAD COMPARATOR (LIGHT_LOAD)
VSRP falling towards VSRN
1
5
9
mV
VLL_FALL
Light load falling threshold
Light load rising hysteresis
1.25
1.25
mV
mV
Measure the voltage drop across current sensing
resistor
VLL_RISE_HYST
BATTERY DEPLETION COMPARATOR (BAT_DEPL) [1]
ChargeOption() bit [12:11] = 00
ChargeOption() bit [12:11] = 01
ChargeOption() bit [12:11] = 10
ChargeOption() bit [12:11] = 11 (Default)
ChargeOption() bit [12:11] = 00
ChargeOption() bit [12:11] = 01
ChargeOption() bit [12:11] = 10
ChargeOption() bit [12:11] = 11 (Default)
55.53% 59.19% 63.5%
58.68% 62.65% 67.5%
62.17% 66.55% 71.5%
Battery depletion falling threshold,
percentage of voltage regulation limit, VSRN
falling
VBATDEPL_FALL
66.06% 70.97%
77%
400
430
450
490
225
240
255
280
305
325
345
370
mV
mV
mV
mV
Battery depletion rising hysteresis, VSRN
rising
VBATDEPL_RHYST
Battery Depletion Rising Deglitch
(Specified by design)
Delay to turn off ACFET and turn on BATFET during
LEARN cycle
tBATDEPL_RDEG
600
ms
BATTERY LOWV COMPARATOR (BAT_LOWV)
VBATLV_FALL
VBATLV_RHYST
IBATLV
Battery LOWV falling threshold
Battery LOWV rising hysteresis
Battery LOWV charge current limit
VSRN falling
2.4
2.5
200
0.5
2.6
V
mV
A
VSRN rising
10 mΩ current sensing resistor
THERMAL SHUTDOWN COMPARATOR (TSHUT)
TSHUT
Thermal shutdown rising temperature
Thermal shutdown hysteresis, falling
Temperature rising
Temperature falling
155
20
°C
°C
TSHUT_HYS
ILIM COMPARATOR
VILIM_FALL
ILIM as CE falling threshold
ILIM as CE rising threshold
VILIM falling
VILIM rising
60
90
75
90
mV
mV
VILIM_RISE
105
120
LOGIC INPUT (SDA, SCL)
VIN_ LO Input low threshold
VIN_ HI
0.8
1
V
V
Input high threshold
Input bias current
2.1
IIN_ LEAK
V = 7 V
–1
μA
LOGIC OUTPUT OPEN DRAIN (ACOK, SDA)
VOUT_ LO
Output saturation voltage
Leakage current
5 mA drain current
V = 7 V
500
1
mV
IOUT_ LEAK
–1
μA
(2) User can adjust threshold via SMBus ChargeOption() REG0x12.
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