LTC4061 Datasheet, PDF (3/20 Pages) Linear Technology – Standalone Linear Li-lon Battery Charger with Thermistor Input

LTC4061
ELECTRICAL CHARACTERISTICS ^{The ● denotes the specifications which apply over the full operating}
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_UT
User Termination Mode Threshold
V_TIMER from Low to High
Voltage
Hysteresis
3.9
4.2
V
50
mV
I_DETECT
ΔV_RECHRG
t_SS
t_TERM
t_RECHRG
t_TIMER
R⎯_C⎯_/⎯₅
V⎯_C⎯_/⎯₅
Charge Current Detection Threshold
Recharge Threshold Voltage
Soft-Start Time
Termination Comparator Filter Time
Recharge Comparator Filter Time
Charge Cycle Time
⎯C⎯/5 Pin Pull-Down Resistor
⎯C⎯/5 Input Threshold Voltage
R_DET = 1k, 0 ≤ T_A ≤ 85°C
R_DET = 2k, 0 ≤ T_A ≤ 85°C
R_DET = 10k, 0 ≤ T_A ≤ 85°C
R_DET = 20k, 0 ≤ T_A ≤ 85°C
V_FLOAT – V_RECHRG, 0 ≤ T_A ≤ 85°C
I_BAT from 0 to I_CHRG
Current Termination Mode
C_TIMER = 0.1µF
⎯C⎯/⎯5 Rising, 4.3V < V_CC < 8V
Hysteresis
90
100 110
mA
45
50
55
mA
8
10
12
mA
3.8
5
6.2
mA
65
100 135
mV
100
µs
0.8
1.5
2.5
ms
3
7
14
ms
2.55
3
3.45
hr
●2
3.4
5
MΩ
0.4
0.7
1
V
70
mV
V_NTC-HOT
V_NTC-COLD
V_NTC-DIS
NTC Pin Hot Threshold Voltage
NTC Pin Cold Threshold Voltage
NTC Pin Disable Threshold Voltage
V_NTC Falling
V_NTC Rising
V_NTC Rising
V_NTC Falling
V_NTC Falling
Hysteresis
0.35 • V_CC
V
0.36 • V_CC
V
0.76 • V_CC
V
0.75 • V_CC
V
70
85
100
mV
50
mV
f⎯_C⎯_H⎯_R⎯_G
T_LIM
NTC Fault Pulsing Frequency
Junction Temperature in Constant
Temperature Mode
Current/User Termination Mode
Time Termination Mode C_TIMER = 0.1µF
1.5
Hz
1
1.5
2
Hz
105
°C
R_ON
Power FET “ON” Resistance
V_BAT = 3.85V, I_CC = 175mA, R_PROG = 2k
(Between V_CC and BAT)
375
mΩ
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC4061 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Failure to correctly solder the exposed pad of the package to the
PC board will result in a thermal resistance much higher than 40°C/W.
Note 4: Supply current includes PROG pin current and I_DET pin current
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Overtemperature protection will become active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
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