LTC4006_15 Datasheet, PDF (3/20 Pages) Linear Technology – 4A, High Efficiency, Standalone Li-Ion Battery Charger

LTC4006
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
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
● 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
1.5
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
V_NTC ≤ 10V
10
Indicator Outputs (ACP/SHDN, CHG)
C10TOL C/10 Indicator Accuracy
Voltage Falling at PROG
● 0.375 0.400 0.425
LBTOL LOBAT Threshold Accuracy
RESTART Threshold Accuracy
LTC4006-6
LTC4006-2
LTC4006-4
LTC4006-6
LTC4006-2
LTC4006-4
● 4.70
● 7.27
● 9.70
4.93 5.14
7.5 7.71
10 10.28
● 7.5
7.8 7.96
● 11.35 11.7 11.94
● 15.15 15.6 15.92
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
●
0.5
● 2.7
– 10
● 15
25
38
–1
1
1
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
µA
µA
µA
V
4006fa
3