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Datasheet Linear Technology LT3574IMS#TRPBF

Linear Technology LT3574IMS#TRPBF

Manufacturer:Linear Technology
Series:LT3574
Part Number:LT3574IMS#TRPBF

Isolated Flyback Converter Without an Opto-Coupler

Datasheets

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    LT3574 Isolated Flyback Converter Without an Opto-Coupler Features Description
    The LT3574 is a monolithic switching regulator 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 into a 16-lead MSOP package. The LT3574 operates with input supply voltages from 3V to 40V, and can deliver output power up to 3W with no external power switch. 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.
    L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and No RSENSE and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n n 3V to 40V Input Voltage Range 0.65A, 60V Integrated NPN Power Switch Boundary Mode Operation No Transformer Third Winding or Opto-Isolator Required for Regulation Improved Primary-Side Winding Feedback Load Regulation VOUT Set with Two External Resistors BIAS Pin for Internal Bias Supply and Power NPN Driver Programmable Soft-Start Programmable Power Switch Current Limit 16-Lead MSOP Package applications
    n Industrial, Automotive and Medical Isolated Power Supplies typical application
    5V Isolated Flyback Converter
    VIN 12V TO 24V 10F 357k SHDN/UVLO 51.1k RFB RREF 6.04k SW VC 28.7k 10k 10nF 59k 1nF
    3574 TA01 B340A VIN 0.22F 2k 50H PMEG6010 80.6k 3:1 OUTPUT VOLTAGE ERROR (%) 5.6H VOUT+ 5V 0.35A 22F VOUT Load Regulation
    1.0 VIN = 24V VIN = 12V 0 0.5 LT3574 TC RILIM SS GND 0.5 TEST BIAS
    1.0 0 100 200 300 400 IOUT (mA) 500 600 700 4.7F 3574 TA01b 3574f LT3574 absolute MaxiMuM ratings
    SW .60V VIN, SHDN/UVLO, RFB, BIAS .40V SS, VC, TC, RREF , RILIM .5V Maximum Junction Temperature . 125C Operating Junction Temperature Range (Note 2). 40C to 125C Storage Temperature Range . 65C to 150C pin conFiguration
    TOP VIEW GND TEST GND SW VIN BIAS SHDN/UVLO GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GND TC RREF RFB VC RILIM SS GND MS PACKAGE 16-LEAD PLASTIC MSOP TJMAX = 125C, JA = 120C/W, JC = 21C/W orDer inForMation
    LEAD FREE FINISH LT3574EMS#PBF LT3574IMS#PBF TAPE AND REEL LT3574EMS#TRPBF LT3574IMS#TRPBF PART MARKING* 3574 3574 PACKAGE DESCRIPTION 16-Lead Plastic MSOP 16-Lead Plastic MSOP TEMPE ...

Manufacturer's Classification

Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers

Other Names: LT3574IMSTRPBF, LT3574IMS TRPBF

Docket:
LT3574 Isolated Flyback Converter Without an Opto-Coupler Features Description
The LT3574 is a monolithic switching regulator 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 into a 16-lead MSOP package. The LT3574 operates with input supply voltages from 3V to 40V, and can deliver output power up to 3W with no external power switch. 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 ma...

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