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LTC4008EGN Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4008EGN
Description  4A, High Efficiency, Multi-Chemistry Battery Charger
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4008EGN Datasheet(HTML) 3 Page - Linear Technology

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3
LTC4008
4008fa
The
denotes 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.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Current Sense Amplifier, CA1
Input Bias Current Into BAT Pin
11.66
µA
CMSL
CA1/I1 Input Common Mode Low
0V
CMSH
CA1/I1 Input Common Mode High
VDCIN ≤ 28V
VCLN – 0.2
V
VOS
Input Voltage Offset
–3.5
3.5
mV
Current Comparators ICMP and IREV
ITMAX
Maximum Current Sense Threshold (VCSP – VBAT)VITH = 2.5V
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
93
100
107
mV
ICLN
CLN Input Bias Current
100
nA
Voltage Error Amplifier, EA
Transconductance
1
mmho
VREF
Reference Voltage Used to Calculate VFLOAT
1.19
V
IBEA
Input Bias Current
±4
±25
nA
Sink Current
Measured at ITH, VITH = 1.4V
36
µA
OVSD
Overvoltage Shutdown Threshold as a Percent
102
107
110
%
of Programmed Charger Voltage
Input P-Channel FET Driver (INFET) (LTC4008 Only)
DCIN Detection Threshold (VDCIN – VCLP)
DCIN Voltage Ramping Up
0
0.17
0.25
V
from VCLP – 0.1V
Forward Regulation Voltage (VDCIN – VCLP)
25
50
mV
Reverse Voltage Turn-Off Voltage (VDCIN – VCLP)
DCIN Voltage Ramping Down
–60
–25
mV
INFET “On” Clamping Voltage (VCLP – VINFET)IINFET = 1µA
5
5.8
6.5
V
INFET “Off” Clamping Voltage (VCLP – VINFET)IINFET = – 25µA
0.25
V
Thermistor
NTCVR
Reference Voltage During Sample Time
4.5
V
High Threshold
VNTC Rising
NTCVR
NTCVR
NTCVR
V
• 0.48
• 0.5
• 0.52
Low Threshold
VNTC Falling
NTCVR
NTCVR
NTCVR
V
• 0.115
• 0.125
• 0.135
Thermistor Disable Current
VNTC ≤ 10V
10
µA
Indicator Outputs (ACP/ SHDN, FLAG, ICL, FAULT
C10TOL
FLAG (C/10) Accuracy
Voltage Falling at PROG
0.375
0.397
0.420
V
ICL Threshold Accuracy
VCLP – VCLN
83
93
105
mV
VOL
Low Logic Level of ACP/SHDN, FLAG, ICL, FAULT
IOL = 100µA
0.5
V
VOH
High Logic Level of ACP/SHDN, ICL
IOH = –1µA
2.7
V
IOFF
Off State Leakage Current of FLAG, FAULT
VOH = 3V
–1
1
µA
IPO
Pull-Up Current on ACP/SHDN, ICL
V = 0V
–10
µA


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