Datasheet

LTC4007
3
4007fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range (Note 4), otherwise specifi cations are at T
A
= 25°C. V
DCIN
= 20V, V
BAT
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Sense Amplifi er, CA1
Input Bias Current Into BAT Pin 11.67 μA
CMSL CA1/I
1
Input Common Mode Low
l
0V
CMSH CA1/I
1
Input Common Mode High
l
V
CLN
– 0.2 V
Current Comparators I
CMP
and I
REV
I
TMAX
Maximum Current Sense Threshold (V
CSP
– V
BAT
)V
ITH
= 2.5V
l
140 165 200 mV
I
TREV
Reverse Current Threshold (V
CSP
– V
BAT
) –30 mV
Current Sense Amplifi er, CA2
Transconductance 1 mmho
Source Current Measured at I
TH
, V
ITH
= 1.4V –40 μA
Sink Current Measured at I
TH
, V
ITH
= 1.4V 40 μA
Current Limit Amplifi er
Transconductance 1.4 mmho
V
CLP
Current Limit Threshold
l
93 100 107 mV
I
CLP
CLP Input Bias Current 100 nA
Voltage Error Amplifi er, EA
Transconductance 1 mmho
Sink Current Measured at I
TH
, V
ITH
= 1.4V 36 μA
OVSD Overvoltage Shutdown Threshold as a Percent of
Programmed Charger Voltage
l
102 107 110 %
Input P-Channel FET Driver (INFET)
DCIN Detection Threshold (V
DCIN
– V
CLN
) DCIN Voltage Ramping Up
from V
CLN
– 0.1V
l
0 0.17 0.25 V
Forward Regulation Voltage (V
DCIN
– V
CLN
)
l
25 50 mV
Reverse Voltage Turn-Off Voltage (V
DCIN
– V
CLN
) DCIN Voltage Ramping Down
l
–60 –25 mV
INFET “On” Clamping Voltage (V
DCIN
– V
INFET
)I
INFET
= 1μA
l
5 5.8 6.5 V
INFET “Off” Clamping Voltage (V
DCIN
– V
INFET
)I
INFET
= –25μA 0.25 V
Thermistor
NTCVR Reference Voltage During Sample Time 4.5 V
High Threshold V
NTC
Rising
l
NTCVR
• 0.48
NTCVR
• 0.5
NTCVR
• 0.52
V
Low Threshold V
NTC
Falling
l
NTCVR
• 0.115
NTCVR
• 0.125
NTCVR
• 0.135
V
Thermistor Disable Current V
NTC
≤ 10V 10 μA
Indicator Outputs (ACP, CHG, FLAG, LOBAT, I
CL
, FAULT
C10TOL FLAG (C/10) Accuracy Voltage Falling at PROG
l
0.375 0.397 0.420 V
LBTOL LOBAT Threshold Accuracy 3C4C = 0V, CHEM = 0V
3C4C = 0V, CHEM = Open
3C4C = Open, CHEM = 0V
3C4C = Open, CHEM = Open
l
l
l
l
7.10
7.27
9.46
9.70
7.32
7.50
9.76
10
7.52
7.71
10.10
10.28
V
V
V
V
RESTART Threshold Accuracy 3C4C = 0V, CHEM = 0V
3C4C = 0V, CHEM = Open
3C4C = Open, CHEM = 0V
3C4C = Open, CHEM = Open
l
l
l
l
11.13
11.40
14.84
15.20
11.42
11.70
15.23
15.60
11.65
11.94
15.54
15.92
V
V
V
V
I
CL
Threshold Accuracy 83 93 1O5 mV