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IC manufacturers ADI Power by Linear

IC manufacturers (84)

ADI Power by Linear LT3511

Monolithic High Voltage Isolated Flyback Converter

Overview

TopologyFlyback Converter
Input voltage8-20 V
Switching frequency40-650 kHz
Output 115 V / 0.04 A
Output 270 V / 0 A
IC revisionC

Description

The LT3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. The device integrates a 240mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.

The LT3511 operates from an input voltage range of 4.5V to 100V and delivers up to 2.5W of isolated output power. Two external resistors and the transformer turns ratio easily set the output voltage. Off-the-shelf transformers are available for several applications. The high level of integration and the use of boundary mode operation results in a simple, clean, tightly regulated application solution to the traditionally tough problem of isolated power delivery.

Features

  • 4.5V to 100V Input Voltage Range
  • Internal 240mA, 150V Power Switch
  • Boundary Mode Operation
  • No Transformer Third Winding or
  • Opto-Isolator Required for Regulation
  • Improved Primary-Side Winding Feedback Load Regulation
  • VOUT Set with Two External Resistors
  • BIAS Pin for Internal Bias Supply and Power Switch Driver
  • No External Start-Up Resistor
  • 16-Lead MSOP Package

Remarks:-Refer Table 1.Predesigned Transformers page no.10

Typical applications

  • Medical Power Supplies
  • Automotive Power Supplies
  • Isolated Industrial Power Supplies
  • Housekeeping Power Supplies
  • Isolated Telecom Power Supplies

Products

Order Code Data­sheet Downloads Product seriesfswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
L
(mm)
W
(mm)
H
(mm)
MountVINVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
L1
(µH)
nISAT
(A)
LSmin.
(µH)
VT
(V (AC))
SizeIC Reference Samples
750311692SPEC
8 files WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748 9.14 9.78 10.54 8 - 15 V (DC) 150 0.001 150 0.001 80 1 : 5 1 2 1500 EP7 LT3748
750311660SPEC
5 files MID-FLYLT Flyback Transformers for Linear Technology 190 350 6:3:1 0.52 9.78 9.5 10.54 SMT 36 - 72 V (DC) 15 0.14 5 1500 EP7
Order Code Data­sheet
750311692SPEC
750311660SPEC
Samples
Order Code Data­sheet Downloads Product seriesfswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
L
(mm)
W
(mm)
H
(mm)
MountVINVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
L1
(µH)
nISAT
(A)
LSmin.
(µH)
VT
(V (AC))
SizeIC Reference Samples