This document introduces the LT3573 isolated monolithic flyback converter for isolated DC/DC applications. The converter uses a primary-side sensing scheme that is capable of detecting the output voltage through the flyback switching node waveform. This scheme solves many of the design difficulties commonly associated with flyback converters, such as transformer design, control loop right-half-plane (RHP) zero and optocoupler propagation delay.
The document introduces the LT3573 isolated monolithic flyback converter, which simplifies design by eliminating the need for an optocoupler through a primary-side sensing scheme. It explains how this approach detects output voltage via the switching node waveform to maintain galvanic isolation while improving dynamic performance.
The device supports a wide input range from 3V to 40V.
The IC can deliver up to 7W of output power.