LTC4008 Linear Technology, LTC4008 Datasheet - Page 3

• Manufacturer Part Number: LTC4008
• Description: Multi-Chemistry Battery Charger
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
temperature range (Note 4), otherwise specifications are at T
SYMBOL
Current Sense Amplifier, CA1
CMSL
CMSH
V
Current Comparators I
I
I
Current Sense Amplifier, CA2
Current Limit Amplifier
V
I
Voltage Error Amplifier, EA
V
I
OVSD
Input P-Channel FET Driver (INFET) (LTC4008 Only)
Thermistor
NTCVR
Indicator Outputs (ACP/ SHDN, FLAG, I
C10TOL
V
V
I
I
TMAX
TREV
CLN
BEA
OFF
PO
OS
CLP
REF
OL
OH
PARAMETER
Input Bias Current Into BAT Pin
CA1/I
CA1/I
Input Voltage Offset
Maximum Current Sense Threshold (V
Reverse Current Threshold (V
Transconductance
Source Current
Sink Current
Transconductance
Current Limit Threshold
CLN Input Bias Current
Transconductance
Reference Voltage Used to Calculate V
Input Bias Current
Sink Current
Overvoltage Shutdown Threshold as a Percent
of Programmed Charger Voltage
DCIN Detection Threshold (V
Forward Regulation Voltage (V
Reverse Voltage Turn-Off Voltage (V
INFET “On” Clamping Voltage (V
INFET “Off” Clamping Voltage (V
Reference Voltage During Sample Time
High Threshold
Low Threshold
Thermistor Disable Current
FLAG (C/10) Accuracy
I
Low Logic Level of ACP/SHDN, FLAG, I
High Logic Level of ACP/SHDN, I
Off State Leakage Current of FLAG, FAULT
Pull-Up Current on ACP/SHDN, I
CL
Threshold Accuracy
1
1
Input Common Mode Low
Input Common Mode High
CMP
and I
REV
CL
DCIN
CSP
, FAULT
DCIN
CL
CLP
CLP
CL
– V
– V
– V
DCIN
– V
– V
CLP
BAT
FLOAT
CSP
CLP
CL
INFET
INFET
)
)
– V
, FAULT
)
– V
CLP
)
)
BAT
)
) V
CONDITIONS
V
Measured at I
Measured at I
Measured at I
DCIN Voltage Ramping Up
from V
DCIN Voltage Ramping Down
I
I
V
V
V
Voltage Falling at PROG
V
I
I
V
V = 0V
INFET
INFET
OL
OH
DCIN
ITH
NTC
NTC
NTC
CLP
OH
The
= 100µA
= –1µA
= 3V
= 2.5V
– V
A
Rising
Falling
≤ 10V
= – 25µA
≤ 28V
= 1µA
CLP
= 25°C. V
●
CLN
denotes specifications which apply over the full operating
– 0.1V
TH
TH
TH
, V
, V
, V
DCIN
ITH
ITH
ITH
= 1.4V
= 1.4V
= 1.4V
= 20V, V
BAT
= 12V unless otherwise noted.
●
●
●
●
●
●
●
●
●
●
●
●
●
NTCVR
NTCVR
• 0.115
• 0.48
0.375
–3.5
MIN
– 60
140
102
2.7
93
83
–1
0
0
5
NTCVR
NTCVR
• 0.125
11.66
0.397
1.19
0.17
• 0.5
TYP
– 30
– 40
– 25
–10
165
100
100
107
1.4
5.8
4.5
±4
36
40
25
93
1
1
LTC4008
V
CLN
NTCVR
NTCVR
• 0.135
• 0.52
0.420
MAX
0.25
0.25
200
107
±25
110
105
3.5
6.5
0.5
50
10
1
– 0.2
UNITS
mmho
mmho
mmho
4008fa
3
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
nA
nA
µA
µA
µA
µA
%
V
V
V
V
V
V
V
V
V
V
V
V