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LTC4110
4
4110fb
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. Unless otherwise specied, VDCIN = VDCOUT = VDCDIV = 12V, VBAT = 8.4V,
GND = SGND = CLP = CLN = SHDN = 0V and RVREF = 49.9k. All currents into device pins are positive and all currents out of device pins
are negative. All voltages are referenced to GND, unless otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VBOV
Battery Overvoltage Threshold;
VBAT Increasing
All Li-Ion, Lead Acid as Percentage of
Float Voltage
NiMH/NiCd (Note 8)
105
1.80
107.5
1.85
110
1.90
%
V
VBOVH
Battery Overvoltage Threshold Hysteresis;
VBAT Increasing.
All Li-Ion, Lead Acid as Percentage of
Float Voltage
NiMH/NiCd (Note 8)
2
40
%
mV
VREF
Reference Pin Voltage Range
l
1.208
1.220
1.232
V
FTMR
Programmed Timer Accuracy
CTIMER = 47nF
l
–15
0
15
%
tTIMEOUT
Time Between Receiving Valid
ChargingCurrent() and ChargingVoltage()
Commands. Wake-Up Timer.
l
140
175
210
sec
Calibration Performance
VCTOL
Calibration Cut-Off Default Voltage Accuracy;
VBAT Decreasing
2.75V for Li-Ion, 1.93V for Lead Acid,
VCAL = GND (Note 8), 0.95V for NiMH/NiCd
l
–1.1
–1.3
1.1
1.3
%
VCTOLH
Calibration Cut-Off Default Voltage Hysteresis;
VBAT Increasing. (Note 8)
Li-Ion
Lead Acid
NiMH/NiCd
85
50
40
mV
VCATOL
Calibration Cut-Off Voltage Adjust Accuracy
±400mV for Li-Ion, ±300mV for Lead Acid,
±200mV for NiMH/NiCd (Note 8)
l
–1.5
1.5
%
IFTOL
Calibration Current Accuracy (Note 7)
VCSP – VCSN = –100mV
l
–5
5
%
IVCAL
VCAL Pin Leakage Current
VCAL = 1.25V
–100
100
nA
IBDT
Back-Drive Current Limit Threshold
VCLP – VCLN Decreasing
VCLN = VDCIN
l
710
13
mV
IBDH
Back-Drive Current Limit Threshold Hysteresis VCLP – VCLN Increasing
VCLN = VDCIN
1mV
VOVP
Calibration Mode Input Overvoltage
Comparator DCDIV Pin Threshold
VDCDIV Rising
l
1.4
1.5
1.6
V
VOVPH
Calibration Mode Input Overvoltage
Comparator DCDIV Pin Hysteresis
VDCDIV Falling
100
mV
AC Present and Discharge Cut-Off Comparators
VAC
AC Present Comparator DCDIV Pin Threshold
VDCDIV Falling
l
1.196
1.22
1.244
V
VACH
AC Present Comparator DCDIV Pin Hysteresis
VDCDIV Rising
50
mV
IAC
AC Present Comparator DCDIV Pin Input Bias
Current
VDCDIV = 1.25V
100
nA
tAC
ACPb Pin Externally Programmed Falling Delay CACPDLY = 100nF, RVREF = 49.9k,
VDCDIV Stepped From 1.17V to 1.30V
8
10
12
ms
VDTOL
Discharge Cut-Off Default Voltage Accuracy;
VBAT Decreasing
2.75V for Li-Ion, 1.93V for Lead Acid,
VDIS = GND, 0.95V for NiMH/NiCd
l
–1.5
1.5
%
VDTOLH
Discharge Cut-Off Default Voltage Hysteresis;
VBAT Increasing (Note 8)
Li-Ion
Lead acid
NiMH/NiCd
85
50
40
mV
VDATOL
Discharge Cut-Off Voltage Adjust Accuracy
±400mV for Li-Ion, ±300mV for Lead Acid,
±200mV for NiMH/NiCd
l
22
%
IVDIS
VDIS Pin Bias Current
VDIS = 1.25V
–100
100
nA