LT3574IMS#PBF

LINEAR TECHNOLOGY  LT3574IMS#PBF  直流-直流开关反激稳压器, 可调, 3V-40V输入, 650mA输出, 1MHz, MSOP-16

The is an Isolated Flyback Converter without an opto-coupler specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary-side flyback waveform. A 0.65A, 60V NPN power switch is integrated along with all control logic. The LT3574 operates with input supply voltages from 3 to 40V and can deliver output power up to 3W with no external power devices. The LT3574 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation. The output voltage is easily set with two external resistors and the transformer turns ratio. Off-the-shelf transformers are available for many applications.

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0.65A, 60V Integrated NPN power switch

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Boundary mode operation

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No transformer third winding or opto-isolator required for regulation

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Improved primary-side winding feedback load regulation

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VOUT set with two external resistors

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BIAS pin for internal bias supply and power NPN driver

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Programmable soft-start

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Programmable power switch current limit