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LTC4061 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4061
Description  Standalone Linear Li-Ion Battery Charger with Thermistor Input
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

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LTC4061

4061fd
elecTrical characTerisTics
Note1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note2: 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.
Note3: 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.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
REN
EN Pin Pull-Down Resistor
l
2
3.4
5
VEN
EN Input Threshold Voltage
EN Rising, 4.3V < VCC < 8V
Hysteresis
0.4
0.7
70
1
V
mV
VCT
Charge Termination Mode Threshold
Voltage
VTIMER from High to Low
Hysteresis
0.4
0.7
50
1
V
mV
VUT
User Termination Mode Threshold
Voltage
VTIMER from Low to High
Hysteresis
3.9
4.2
50
V
mV
IDETECT
Charge Current Detection Threshold
RDET = 1k, 0 ≤ TA ≤ 85°C
RDET = 2k, 0 ≤ TA ≤ 85°C
RDET = 10k, 0 ≤ TA ≤ 85°C
RDET = 20k, 0 ≤ TA ≤ 85°C
90
45
8
3.8
100
50
10
5
110
55
12
6.2
mA
mA
mA
mA
ΔVRECHRG
Recharge Threshold Voltage
VFLOAT – VRECHRG, 0 ≤ TA ≤ 85°C
65
100
135
mV
tSS
Soft-Start Time
IBAT from 0 to ICHRG
100
µs
tTERM
Termination Comparator Filter Time
Current Termination Mode
0.8
1.5
2.5
ms
tRECHRG
Recharge Comparator Filter Time
3
7
14
ms
tTIMER
Charge Cycle Time
CTIMER = 0.1µF
2.55
3
3.45
hr
RC/5
C/5 Pin Pull-Down Resistor
l
2
3.4
5
VC/5
C/5 Input Threshold Voltage
C/5 Rising, 4.3V < VCC < 8V
Hysteresis
0.4
0.7
70
1
V
mV
VNTC-HOT
NTC Pin Hot Threshold Voltage
VNTC Falling
VNTC Rising
0.35 • VCC
0.36 • VCC
V
V
VNTC-COLD
NTC Pin Cold Threshold Voltage
VNTC Rising
VNTC Falling
0.76 • VCC
0.75 • VCC
V
V
VNTC-DIS
NTC Pin Disable Threshold Voltage
VNTC Falling
Hysteresis
70
85
50
100
mV
mV
fCHRG
NTC Fault Pulsing Frequency
Current/User Termination Mode
Time Termination Mode CTIMER = 0.1µF
1
1.5
1.5
2
Hz
Hz
TLIM
Junction Temperature in Constant
Temperature Mode
105
°C
RON
Power FET On-Resistance
(Between VCC and BAT)
VBAT = 3.85V, ICC = 175mA, RPROG = 2k
375
Theldenotesthespecificationswhichapplyoverthefulloperating
temperaturerange,otherwisespecificationsareatTA=25°C.VCC=5V,unlessotherwisenoted.
Note4: Supply current includes PROG pin current and IDET pin current
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note5: 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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