Linear Technology LTC4110, Руководство пользователя

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LTC4110
4
4110fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. Unless otherwise specifi ed, V
DCIN
= V
DCOUT
= V
DCDIV
= 12V, V
BAT
= 8.4V,
GND = SGND = CLP = CLN = SHDN = 0V and R
VREF
= 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 specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
BOV
Battery Overvoltage Threshold;
V
BAT
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
V
BOVH
Battery Overvoltage Threshold Hysteresis;
V
BAT
Increasing.
All Li-Ion, Lead Acid as Percentage of
Float Voltage
NiMH/NiCd (Note 8)
2
40
%
mV
V
REF
Reference Pin Voltage Range
l
1.208 1.220 1.232 V
F
TMR
Programmed Timer Accuracy C
TIMER
= 47nF
l
–15 0 15 %
t
TIMEOUT
Time Between Receiving Valid
ChargingCurrent() and ChargingVoltage()
Commands. Wake-Up Timer.
l
140 175 210 sec
Calibration Performance
V
CTOL
Calibration Cut-Off Default Voltage Accuracy;
V
BAT
Decreasing
2.75V for Li-Ion, 1.93V for Lead Acid,
V
CAL
= GND (Note 8), 0.95V for NiMH/NiCd
l
–1.1
–1.3 1.1
1.3 %
%
V
CTOLH
Calibration Cut-Off Default Voltage Hysteresis;
V
BAT
Increasing. (Note 8)
Li-Ion
Lead Acid
NiMH/NiCd 85
50
40 mV
mV
mV
V
CATOL
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 %
I
FTOL
Calibration Current Accuracy (Note 7) V
CSP
– V
CSN
= –100mV
l
–5 5 %
I
VCAL
V
CAL
Pin Leakage Current V
CAL
= 1.25V –100 100 nA
I
BDT
Back-Drive Current Limit Threshold V
CLP
– V
CLN
Decreasing
V
CLN
= V
DCIN
l
7 10 13 mV
I
BDH
Back-Drive Current Limit Threshold Hysteresis V
CLP
– V
CLN
Increasing
V
CLN
= V
DCIN
1 mV
V
OVP
Calibration Mode Input Overvoltage
Comparator DCDIV Pin Threshold V
DCDIV
Rising
l
1.4 1.5 1.6 V
V
OVPH
Calibration Mode Input Overvoltage
Comparator DCDIV Pin Hysteresis V
DCDIV
Falling 100 mV
AC Present and Discharge Cut-Off Comparators
V
AC
AC Present Comparator DCDIV Pin Threshold V
DCDIV
Falling
l
1.196 1.22 1.244 V
V
ACH
AC Present Comparator DCDIV Pin Hysteresis V
DCDIV
Rising 50 mV
I
AC
AC Present Comparator DCDIV Pin Input Bias
Current V
DCDIV
= 1.25V 100 nA
t
AC
ACPb Pin Externally Programmed Falling Delay C
ACPDLY
= 100nF, R
VREF
= 49.9k,
V
DCDIV
Stepped From 1.17V to 1.30V 8 10 12 ms
V
DTOL
Discharge Cut-Off Default Voltage Accuracy;
V
BAT
Decreasing
2.75V for Li-Ion, 1.93V for Lead Acid,
V
DIS
= GND, 0.95V for NiMH/NiCd
l
–1.5 1.5 %
V
DTOLH
Discharge Cut-Off Default Voltage Hysteresis;
V
BAT
Increasing (Note 8)
Li-Ion
Lead acid
NiMH/NiCd 85
50
40 mV
mV
mV
V
DATOL
Discharge Cut-Off Voltage Adjust Accuracy ±400mV for Li-Ion, ±300mV for Lead Acid,
±200mV for NiMH/NiCd
l
2 2 %
I
VDIS
V
DIS
Pin Bias Current V
DIS
= 1.25V –100 100 nA