Datasheet

LT3650-4.1/LT3650-4.2
4
36504142fc
TEMPERATURE (°C)
–50
65
I
VIN
CURRENT (µA)
70
75
80
100
90
0
50
75
365042 G02
95
85
–25
25
100
V
RNG/SS
0
0
I
CHG(MAX)
(%)
20
40
60
100
0.4
0.8
1.0
365042 G03
80
0.2
0.6
1.2
TEMPERATURE (°C)
–50
∆V
BAT(FLT)
(%)
0
50
75
3650 G01
0.1
0.05
0
–0.05
–0.1
–25
25
100
125
Typical perForMance characTerisTics
Battery Float Voltage
vs Temperature
V
IN
Standby Mode Current
vs Temperature
Maximum Charge Current vs I
RNG/SS
Voltage, I
CHG(MAX)
as a Percentage
of Programmed I
MAX
T
A
= 25°C, unless otherwise noted.
Note 1: 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.
Note 2: The LT3650E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3650I specifications are
guaranteed over the full –40°C to 85°C temperature range. High junction
temperatures degrade operating lifetimes.
Note 3: V
IN
voltages below the start threshold are only supported if
(V
BOOST
– V
SW
) > 2V.
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V
IN
= 20V, BOOST-SW = 4V, SHDN = 2V, SENSE = BAT = V
BAT(F LT )
, C
TIMER
= 0.68µF.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CHRG
, V
FAULT
Status Low Voltage 10mA Load
l
0.4 V
I
TIMER
Charge/Discharge Current 25 µA
V
TIMER(DIS)
Timer Disable Threshold
l
0.1 0.25 V
t
TIMER
Full Charge Cycle Timeout 3 hr
Precondition Timeout 22.5 min
Timer Accuracy
l
–10 10 %
f
O
Operating Frequency
l
0.9 1 1.1 MHz
DC Duty Cycle Range Continuous Operation
l
15 90 %