LTC4110
3
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
Power Input
DCIN
Operating Voltage Range
Charge or Calibration Modes
l
4.5
19
V
DCOUT
Operating Voltage Range
Charge or Calibration Modes
l
4.5
19
V
Backup Mode
l
2.7
19
V
V
BAT
Operating Voltage Range
Backup Mode
l
2.7
19
V
I
SPLY
Supply Current (I
DCIN
+ I
DCOUT
) in Idle Mode
(Note 4)
2
3
mA
I
BIDL
Battery Current in Idle Mode (Notes 4 and 5)
30
45
μA
I
BBU
Battery Current in Backup Mode (Note 5)
V
DCIN
= 0
2
3
mA
I
BSD
Battery Current in Shutdown (Note 5)
V
SHDN
= V
BAT
, V
DCIN
= 0
20
45
μA
V
UVI
Undervoltage Lockout Exit Threshold
V
DCIN
Increasing
l
3.7
4
4.45
V
V
UVD
Undervoltage Lockout Entry Threshold
V
DCIN
Decreasing
l
3.4
3.7
4.1
V
V
UVH
Undervoltage Lockout Hysteresis
400
mV
V
DD
Regulator
V
DD
Output Voltage
No Load
l
4.5
4.75
5
V
V
DD(MIN)
Output Voltage
I
DD
= –10mA
l
4.25
V
Charging Performance
V
FTOL
Charge Float Voltage Accuracy
4.20V for Li-Ion. 2.35V for Lead Acid (Note 8)
V
CHG
= GND
–5°C < T
A
< 85°C (Note10)
–40°C < T
A
< 85°C
l
–0.5
–0.8
–1
0.5
0.8
1
%
%
%
V
FATOL
Charge Float Voltage Adjust Accuracy
0.3V and –0.3V for Li-Ion Batteries,
0.15V and –0.15V for Lead Acid Batteries
(Note 8)
l
–2
2
%
I
BTOL
Bulk Charge Current Accuracy (Note 7)
V
CSP
– V
CSN
=100mV
V
BAT
≥ 3.1V
–40°C < T
A
< 85°C
l
–3
–5
3
5
%
%
I
PTOL
Preconditioning and Wake-Up Current
Accuracy (Note 7)
V
BAT
≥ 3.3V (Note 8), V
CSP
– V
CSN
= 10mV;
Li-Ion and NiMH/NiCd Batteries Only
–30
30
%
V
BAT
≤ 3.3 (Note 8), V
CSP
– V
CSN
= 10mV;
Li-Ion and NiMH/NiCd Batteries Only
–40
40
%
I
SKVA
Voltage Error Amplifi er Sink Current at I
TH
Pin
V
ITH
= 2V
96
μA
I
SRCA
Current Error Amplifi er Source Current at I
TH
Pin
V
ITH
= 2V
–24
μA
I
SKCA
Current Error Amplifi er Sink Current at I
TH
Pin
V
ITH
= 2V
24
μA
I
VCHG
V
CHG
Pin Bias Current
V
CHG
= 1.25V
–100
100
nA
V
BC
Bulk Charge Threshold Voltage;
V
BAT
Increasing (Note 8)
Li-Ion, V
CHG
= GND
NiMH/NiCd
2.80
0.84
3.00
0.90
3.20
0.96
V
V
V
BCH
Bulk Charge Threshold Voltage Hysteresis;
V
BAT
Decreasing (Note 8)
Li-Ion, V
CHG
= GND
NiMH/NiCd
85
40
mV
mV
V
AR
Auto Recharge Threshold Voltage;
V
BAT
Decreasing
Standard Li-Ion Only;
Specifi ed as Percentage of Float Voltage
93
95
97
%
V
ARH
Auto Recharge Threshold Hysteresis Voltage;
V
BAT
Increasing
Standard Li-Ion Only; Specifi ed as
Percentage of Float Voltage
2
%
