LT8304 150 V/2 A Micropower Isolated Flyback Converter

Analog Devices’ converters for isolated power supplies found in automotive, medical, industrial and telecom applications

Image of Analog Devices' LT8304 Flyback ConverterAnalog Devices' LT8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the parts require no third winding or optoisolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode® operation maintains high efficiency at light load while minimizing the output voltage ripple. A 2 A, 150 V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.

The LT8304 operates from an input voltage range of 3 V to 100 V and deliver up to 24 W of isolated output power. The high level of integration and the use of boundary and low ripple Burst Mode operation result in a simple to use, low component count, and high-efficiency application solution for isolated power delivery. The LT8304-1 version is specially optimized for high step-up output applications. The LT8304 is ideal for isolated power supplies found in automotive, medical, industrial and telecom applications.

Image of Analog Devices' LT8304 Typical Application
  Image of Analog Devices' LT8304 Efficiency vs Load Current
Features
  • 2 A, 150 V internal DMOS power switch
  • 3 V to 100 V input voltage range
  • Low quiescent current:
    • 116 μA in sleep mode
    • 390 μA in active mode
  • Quasi-resonant boundary mode operation at heavy load
  • Low ripple Burst Mode operation at light load
  • Minimum load < 0.5%="" (typ.)="" of="" full="">
  • No transformer third winding or optoisolator
  • Required for output voltage regulation
  • Accurate EN/UVLO threshold and hysteresis
  • Internal compensation and soft-start
  • Temperature compensation for output diode
  • Output short-circuit protection
Applications
 
  • Isolated automotive, medical, industrial, and telecom applications
 
  • Isolated power supplies

LT8304 Flyback Converter Eval Board

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
EVAL BOARD FOR LT8304DC2393AEVAL BOARD FOR LT830433 - ImmediateView Details

LT8304 Flyback Converter ICs

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC REG FLYBACK ADJ 2A 8SOICLT8304ES8E#PBFIC REG FLYBACK ADJ 2A 8SOIC0View Details
IC REG FLYBACK ADJ 2A 8SOICLT8304HS8E#TRPBFIC REG FLYBACK ADJ 2A 8SOIC0View Details
IC REG FLYBACK ADJ 2A 8SOICLT8304HS8E-1#TRPBFIC REG FLYBACK ADJ 2A 8SOIC0View Details
IC REG FLYBACK ADJ 2A 8SOICLT8304IS8E-1#TRPBFIC REG FLYBACK ADJ 2A 8SOIC0View Details

Associated Transformers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
XFRMR FLYBACK DC/DC CONV SMD750315125XFRMR FLYBACK DC/DC CONV SMD0View Details
XFRMR FLYBACK DC/DC CONV SMD750315126XFRMR FLYBACK DC/DC CONV SMD0View Details
XFRMR FLYBACK DC/DC CONV SMD750315835XFRMR FLYBACK DC/DC CONV SMD791 - ImmediateView Details
XFRMR FLYBACK DC/DC CONV SMD750315836XFRMR FLYBACK DC/DC CONV SMD1018 - ImmediateView Details
XFRMR FLYBACK DC/DC CONV SMD750315837XFRMR FLYBACK DC/DC CONV SMD0View Details
XFRMR13324-T083XFRMR143 - ImmediateView Details
XFRMR13324-T084XFRMR304 - ImmediateView Details
XFRMR13324-T085XFRMR260 - ImmediateView Details
XFRMR13324-T086XFRMR2012 - ImmediateView Details
XFRMR13324-T087XFRMR61 - ImmediateView Details
Published: 2018-08-01