LTC4007-1_15 Datasheet, PDF (3/24 Pages) Linear Technology – 4A, High Efficiency, Li-Ion Battery Charger

LTC4007-1
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
Current Sense Amplifier, CA1
Input Bias Current Into BAT Pin
CMSL CA1/I₁ Input Common Mode Low
CMSH CA1/I₁ Input Common Mode High
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
Transconductance
Source Current
Sink Current
Current Limit Amplifier
Measured at I_TH, V_ITH = 1.4V
Measured at I_TH, V_ITH = 1.4V
Transconductance
V_CLP
Current Limit Threshold
I_CLP
CLP Input Bias Current
Voltage Error Amplifier, EA
Transconductance
OVSD
Sink Current
Overvoltage Shutdown Threshold as a Percent
of Programmed Charger Voltage
Measured at I_TH, V_ITH = 1.4V
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
NTCVR Reference Voltage During Sample Time
High Threshold
V_NTC Rising
Low Threshold
V_NTC Falling
Thermistor Disable Current
Indicator Outputs (ACP, CHG, FLAG, LOBAT, I_CL, FAULT
C10TOL FLAG (C/10) Accuracy
LBTOL LOBAT Threshold Accuracy
I_CL Threshold Accuracy
V_NTC ≤ 10V
Voltage Falling at PROG
3C4C = 0V, CHEM = 0V
3C4C = 0V, CHEM = Open
3C4C = Open, CHEM = 0V
3C4C = Open, CHEM = Open
MIN TYP MAX UNITS
●0
●
11.67
µA
V
V_CLN – 0.2
V
● 140
165
200
mV
–30
mV
1
mmho
– 40
µA
40
µA
● 93
1.4
mmho
100
107
mV
100
nA
1
mmho
36
µA
● 102
107
110
%
●0
0.17 0.25
V
●
25
50
mV
● – 60 – 25
mV
●5
5.8
6.5
V
0.25
V
4.5
V
● NTCVR NTCVR NTCVR
V
• 0.48 • 0.5 • 0.52
● NTCVR NTCVR NTCVR
V
• 0.115 • 0.125 • 0.135
10
µA
● 0.375 0.397 0.420
V
● 9.233 9.519 9.805
V
● 9.458 9.750 10.043
V
● 12.311 12.692 13.074
V
● 12.610 13.000 13.390
V
83
93
1O5
mV
40071f
3