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IC manufacturers ADI Power by Linear

IC manufacturers (84)

ADI Power by Linear LT3512

Monolithic High Voltage Isolated Flyback Converter

Overview

TopologyFlyback Converter
Input voltage4.5-100 V
Switching frequency40-650 kHz
IC revisionB

Description

The LT3512 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 420mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.

The LT3512 operates from an input voltage range of 4.5V to 100V and delivers up to 4.5W 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 420mA, 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 page num 10 for more transformers.

Typical applications

  • Isolated Auxiliary/Housekeeping Power Supplies
  • Isolated Telecom Power Supplies
  • Isolated Industrial Power Supplies
  • Medical Power Supplies
  • Automotive 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
750311559SPEC
5 files MID-FLYLT Flyback Transformers for Linear Technology 200 - 300 175 4:1:1 0.8 9.78 9.14 10.54 SMT 35 - 75 V (DC) 5 0.4 5 1500 EP7
750311966SPEC
Flyback Transformer WE-FB
750311573SPEC
Flyback Transformer WE-FB
750311661SPEC
Flyback Transformer
750311662SPEC
Flyback Transformer WE-FB
750311839SPEC
Flyback Transformer WE-FB
750311964SPEC
Flyback Transformer WE-FB
Order Code Data­sheet
750311692SPEC
750311559SPEC
750311966SPEC
750311573SPEC
750311661SPEC
750311662SPEC
750311839SPEC
750311964SPEC
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