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LT3512 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3512
Description  Monolithic High Voltage Isolated Flyback Converter
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3512 Datasheet(HTML) 3 Page - Linear Technology

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LT3512
3
3512f
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 24V 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 LT3512E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3512I is guaranteed to meet performance specifications from –40°C to
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TC Current into RREF
RTC = 53.6k
9.5
μA
BIAS Pin Voltage
Internally Regulated
3
3.1
3.2
V
125°C operating junction temperature range. The LT3512H is guaranteed
over the full –40°C to 150°C operating junction temperature range. High
junction temperatures degrade operating lifetimes. Operating lifetime is
derated at junction temperatures greater than 125°C.
Note 3: Current flows out of the RREF pin.
Note 4: The SW pin is rated to 150V for transients. Operating waveforms
of the SW pin should keep the pedestal of the flyback waveform below
100V as shown in Figure 5.
TYPICAL PERFORMANCE CHARACTERISTICS
Switch VCESAT
Switch Current Limit
Quiescent Current vs VIN
Output Voltage
Quiescent Current
BIAS Pin Voltage
TA = 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50 –25
0
4
8
0
50
75
3512 G02
2
6
25
100
150
125
VIN = 24V
VIN = 48V
VIN = 100V
TEMPERATURE (°C)
–50
2.0
2.5
3.0
3.5
4.0
–25
0
25
50
3512 G03
75
100
150
125
VIN = 24V, 10mA
VIN = 24V, NO LOAD
SWITCH CURRENT (mA)
0
0
800
2000
100
200
300
3512 G04
400
1600
1200
400
500
TEMPERATURE (°C)
–50
700
25
3512 G05
400
200
–25
0
50
100
0
800
600
500
300
75
100
150
125
MINIMUM CURRENT LIMIT
MAXIMUM CURRENT LIMIT
VOLTAGE (V)
0
2
4
3
80
3512 G06
1
0
20
40
60
100
5
TEMPERATURE (°C)
–50
4.75
4.80
4.90
4.95
5.00
5.25
5.10
0
50
75
3512 G01
4.85
5.15
5.20
5.05
–25
25
100 125
150
VIN = 48V



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