LT1681 - Dual Transistor Synchronous Forward Controller

The LT1681 controller simplifies the design of high power synchronous dual Transistor forward DC/DC converters. The part employs fixed frequency current mode control and supports both isolated and nonisolated topologies. The IC drives external N-channel Power MOSFETs and operates with input voltages up to 72V.
The LT1681s operating frequency is programmable and CAN be synchronized up to 350kHz. Switch phase is also controlled during synchronized operation to accommodate multiple converter systems. Internal Logic guarantees 50%maximum duty cycle operation to prevent transformer saturation.
The LT1681 incorporates a soft-start feature that provides a controlled increase in supplied current during start-up and after an undervoltage lockout or overvoltage/overcurrent event.
The part is available in a 20-lead wide SO package to support high voltage pin-to-pin clearance.
By Linear Technology Corporation
LT1681 's PackagesLT1681 's pdf datasheet
LT1681ESW-PBF SOIC
LT1681ESW-TRPBF SOIC
LT1681ISW-PBF SOIC
LT1681ISW-TRPBF SOIC




LT1681 Pinout, Pinouts
LT1681 pinout,Pin out
This is one package pinout of LT1681,If you need more pinouts please download LT1681's pdf datasheet.

LT1681 Application circuits
LT1681 circuits
This is one application circuit of LT1681,If you need more circuits,please download LT1681's pdf datasheet.


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