LT8304 150 V/2 A Micropower Isolated Flyback Converter

Analog 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.

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