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LT3574 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3574
Description  Monolithic High Voltage Isolated Flyback Converter No External Start-Up Resistor
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3574 Datasheet(HTML) 3 Page - Linear Technology

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LT3511
3
3511fa
elecTrical characTerisTics
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 LT3511E 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
LT3511I is guaranteed to meet performance specifications from –40°C to
125°C operating junction temperature range. The LT3511H is guaranteed
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.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Switching Frequency
40
kHz
TC Current into RREF
RTC = 53.6k
9.5
µA
BIAS Pin Voltage
Internally Regulated
3
3.1
3.2
V
to meet performance specifications from –40°C to 150°C operating
junction temperature range. The LT3511MP is guaranteed over the full
–55°C to 150°C operating junction 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
TEMPERATURE (°C)
–50
4.75
4.80
4.90
4.95
5.00
5.25
5.10
0
50
75
3511 G01
4.85
5.15
5.20
5.05
–25
25
100 125 150
VIN = 48V
TEMPERATURE (°C)
–50 –25
0
2
5
0
50
75
3511 G02
1
4
3
25
100 125 150
VIN = 24V
VIN = 48V
VIN = 100V
TEMPERATURE (°C)
–50
2.0
2.5
3.0
3.5
4.0
–25
0
25
50
3511 G03
5
2
1
0
5
1
0
0
1
5
7
VIN = 24V, 10mA
VIN = 24V, NO LOAD
SWITCH CURRENT (mA)
0
50
0
400
1000
100
200
250
3511 G04
200
800
600
150
300 350
TEMPERATURE (°C)
–50
350
25
3511 G05
200
100
–25
0
50
50
0
400
300
250
150
5
2
1
0
5
1
0
0
1
5
7
MINIMUM CURRENT LIMIT
MAXIMUM CURRENT LIMIT
VOLTAGE (V)
0
2
3
80
3511 G06
1
0
20
40
60
100
4
TA = 25°C, unless otherwise noted.



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