LTC4007_1 Datasheet, PDF (3/24 Pages) Linear Technology – 4A, High Efficiency, Standalone Li-Ion Battery Charger

LTC4007
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at T_A = 25°C. V_DCIN = 20V, V_BAT = 12V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
Current Comparators I_CMP and I_REV
I_TMAX
Maximum Current Sense Threshold (V_CSP – V_BAT)
I_TREV
Reverse Current Threshold (V_CSP – V_BAT)
Current Sense Amplifier, CA2
V_ITH = 2.5V
● 140
165
200
–30
Transconductance
1
Source Current
Sink Current
Current Limit Amplifier
Measured at I_TH, V_ITH = 1.4V
– 40
Measured at I_TH, V_ITH = 1.4V
40
Transconductance
1.4
V_CLP
Current Limit Threshold
I_CLP
CLP Input Bias Current
Voltage Error Amplifier, EA
● 93
100
107
100
Transconductance
1
OVSD
Sink Current
Overvoltage Shutdown Threshold as a Percent
of Programmed Charger Voltage
Measured at I_TH, V_ITH = 1.4V
36
● 102
107
110
Input P-Channel FET Driver (INFET)
DCIN Detection Threshold (V_DCIN – V_CLN)
Forward Regulation Voltage (V_DCIN – V_CLN)
Reverse Voltage Turn-Off Voltage (V_DCIN – V_CLN)
INFET “On” Clamping Voltage (V_DCIN – V_INFET)
INFET “Off” Clamping Voltage (V_DCIN – V_INFET)
Thermistor
DCIN Voltage Ramping Up
from V_CLN – 0.1V
DCIN Voltage Ramping Down
I_INFET = 1µA
I_INFET = – 25µA
●0
0.17 0.25
●
25
50
● – 60 – 25
●5
5.8
6.5
0.25
NTCVR Reference Voltage During Sample Time
4.5
High Threshold
V_NTC Rising
● NTCVR NTCVR NTCVR
• 0.48 • 0.5 • 0.52
Low Threshold
V_NTC Falling
● NTCVR NTCVR NTCVR
• 0.115 • 0.125 • 0.135
Thermistor Disable Current
Indicator Outputs (ACP, CHG, FLAG, LOBAT, I_CL, FAULT
C10TOL FLAG (C/10) Accuracy
V_NTC ≤ 10V
Voltage Falling at PROG
10
● 0.375 0.397 0.420
LBTOL LOBAT Threshold Accuracy
3C4C = 0V, CHEM = 0V
3C4C = 0V, CHEM = Open
3C4C = Open, CHEM = 0V
3C4C = Open, CHEM = Open
● 7.10
● 7.27
● 9.46
● 9.70
7.32 7.52
7.50 7.71
9.76 10.10
10 10.28
RESTART Threshold Accuracy
3C4C = 0V, CHEM = 0V
3C4C = 0V, CHEM = Open
3C4C = Open, CHEM = 0V
3C4C = Open, CHEM = Open
● 11.13
● 11.40
● 14.84
● 15.20
11.42
11.70
15.23
15.60
11.65
11.94
15.54
15.92
I_CL Threshold Accuracy
83
93
1O5
UNITS
mV
mV
mmho
µA
µA
mmho
mV
nA
mmho
µA
%
V
mV
mV
V
V
V
V
V
µA
V
V
V
V
V
V
V
V
V
mV
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