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LTC4007 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4007
Description  4A, High Effi ciency, Standalone Li-Ion Battery Charger
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4007 Datasheet(HTML) 3 Page - Linear Technology

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LTC4007
3
4007fc
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT = 12V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Current Sense Amplifier, CA1
Input Bias Current Into BAT Pin
11.67
μA
CMSL
CA1/I1 Input Common Mode Low
l
0V
CMSH
CA1/I1 Input Common Mode High
l
VCLN – 0.2
V
Current Comparators ICMP and IREV
ITMAX
Maximum Current Sense Threshold (VCSP – VBAT)VITH = 2.5V
l
140
165
200
mV
ITREV
Reverse Current Threshold (VCSP – VBAT)
–30
mV
Current Sense Amplifier, CA2
Transconductance
1
mmho
Source Current
Measured at ITH, VITH = 1.4V
–40
μA
Sink Current
Measured at ITH, VITH = 1.4V
40
μA
Current Limit Amplifier
Transconductance
1.4
mmho
VCLP
Current Limit Threshold
l
93
100
107
mV
ICLP
CLP Input Bias Current
100
nA
Voltage Error Amplifier, EA
Transconductance
1
mmho
Sink Current
Measured at ITH, VITH = 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 (VDCIN – VCLN)
DCIN Voltage Ramping Up
from VCLN – 0.1V
l
0
0.17
0.25
V
Forward Regulation Voltage (VDCIN – VCLN)
l
25
50
mV
Reverse Voltage Turn-Off Voltage (VDCIN – VCLN )
DCIN Voltage Ramping Down
l
–60
–25
mV
INFET “On” Clamping Voltage (VDCIN – VINFET)IINFET = 1μA
l
5
5.8
6.5
V
INFET “Off” Clamping Voltage (VDCIN – VINFET)IINFET = –25μA
0.25
V
Thermistor
NTCVR
Reference Voltage During Sample Time
4.5
V
High Threshold
VNTC Rising
l
NTCVR
• 0.48
NTCVR
• 0.5
NTCVR
• 0.52
V
Low Threshold
VNTC Falling
l
NTCVR
• 0.115
NTCVR
• 0.125
NTCVR
• 0.135
V
Thermistor Disable Current
VNTC ≤ 10V
10
μA
Indicator Outputs (ACP, CHG, FLAG, LOBAT, ICL, 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
ICL Threshold Accuracy
83
93
1O5
mV


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