LT3650 Просмотр технического описания (PDF) - Linear Technology
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LT3650 Datasheet PDF : 20 Pages
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LT3650-4.1/LT3650-4.2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at VIN = 20V, BOOST-SW = 4V, SHDN = 2V, SENSE = BAT = VBAT(FLT), CTIMER = 0.68μF.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCHRG, VFAULT
ITIMER
VTIMER(DIS)
tTIMER
Status Low Voltage
Charge/Discharge Current
Timer Disable Threshold
Full Charge Cycle Timeout
Precondition Timeout
10mA Load
l
0.4
V
25
μA
l 0.1
0.25
V
3
hr
22.5
min
Timer Accuracy
l –10
10
%
fO
Operating Frequency
DC
Duty Cycle Range
Continuous Operation
l 0.9
1
1.1
MHz
l 15
90
%
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: VIN voltages below the start threshold are only supported if
(VBOOST – VSW) > 2V.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Battery Float Voltage
vs Temperature
0.1
0.05
0
– 0.05
– 0.1
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3650 G01
VIN Standby Mode Current
vs Temperature
100
95
90
85
80
75
70
65
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
365042 G02
Maximum Charge Current vs IRNG/SS
Voltage, ICHG(MAX) as a Percentage
of Programmed IMAX
100
80
60
40
20
0
0 0.2 0.4 0.6 0.8 1.0 1.2
VRNG/SS
365042 G03
4
36504142fb
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