Datasheet Analog Devices LT1725IGN#PBF

LT1725
General Purpose
Isolated Flyback Controller U FEATURES DESCRIPTIO ■ The LT®1725 is a monolithic switching regulator controller specifically designed for the isolated flyback topology.
It drives the gate of an external MOSFET and is generally
powered from a third transformer winding. These features
allow for an application input voltage limited only by
external power path components. The third transformer
winding also provides output voltage feedback information, such that an optoisolator is not required. Its gate
drive capability coupled with a suitable external MOSFET
can deliver load power up to tens of watts. ■
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■ Drives External Power MOSFET with External
ISENSE Resistor
Application Input Voltage Limited Only by
External Power Components
Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
Accurate Regulation Without User Trims …