LTC4006 Datasheet, PDF (3/16 Pages) Linear Technology – 4A, High Efficiency, Standalone Li-Ion Battery Charger

LTC4006
ELECTRICAL CHARACTERISTICS The q 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
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
CONDITIONS
V_ITH = 2.5V
MIN TYP MAX UNITS
q 140
165
200
mV
– 30
mV
Transconductance
1
mmho
Source Current
Sink Current
Current Limit Amplifier
Measured at I_TH, V_ITH = 1.4V
Measured at I_TH, V_ITH = 1.4V
– 40
µA
40
µA
Transconductance
1.5
mmho
V_CLP
Current Limit Threshold
I_CLP
CLP Input Bias Current
Voltage Error Amplifier, EA
q 93
100 107
mV
100
nA
Transconductance
1
mmho
OVSD
Sink Current
Overvoltage Shutdown Threshold as a Percent
of Programmed Charger Voltage
Measured at I_TH, V_ITH = 1.4V
36
µA
q 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
q0
0.17 0.25
V
q
25
50
mV
q – 60 – 25
mV
q5
5.8
6.5
V
0.25
V
NTCVR Reference Voltage During Sample Time
4.5
V
High Threshold
V_NTC Rising
q NTCVR NTCVR NTCVR
V
• 0.48 • 0.5 • 0.52
Low Threshold
V_NTC Falling
q NTCVR NTCVR NTCVR
V
• 0.115 • 0.125 • 0.135
Thermistor Disable Current
Indicator Outputs (ACP/SHDN, CHG)
V_NTC ≤ 10V
10
µA
C10TOL C/10 Indicator Accuracy
Voltage Falling at PROG
q 0.375 0.400 0.425
V
LBTOL LOBAT Threshold Accuracy
LTC4006-6
LTC4006-2
LTC4006-4
q 4.70 4.93 5.14
V
q 7.27
7.5
7.71
V
q 9.70
10 10.28
V
RESTART Threshold Accuracy
LTC4006-6
LTC4006-2
LTC4006-4
q 7.5
7.7 7.96
V
q 11.35 11.7 11.94
V
q 15.15 15.6 15.92
V
V_OL
Low Logic Level of ACP/SHDN, CHG
V_OH
High Logic Level of ACP/SHDN
I_PO
Pull-Up Current on ACP/SHDN
IC10
C/10 Indicator Sink Current from CHG
I_OFF
Off State Leakage Current of CHG
Timer Defeat Threshold at CHG
I_OL = 100µA
I_OH = –1µA
V = 0V
V_OH = 3V
V_OH = 3V
q
0.5
V
q 2.7
V
– 10
µA
q 15
25
38
µA
–1
1
µA
1
V
sn4006 4006is
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