Datasheet Linear Technology LTC3705IGN#TRPBF

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Design Notes

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  Isolated Converters Have Buck Simplicity and Performance &mdash DN377
  PDF, 85 Kb, File published: Oct 3, 2005
  Extract from the document

  Isolated Converters Have Buck Simplicity and Performance
  Design Note 377
  Kurk Mathews
  Buck converter designers have long benefited from the
  simplicity, high efficiency and fast transient response
  made possible by the latest buck controller ICs, which
  feature synchronous rectification and PolyPhase® interleaved power stages. Unfortunately, these same features
  have been difficult or impossible to implement in the
  buck converter’s close relative, the forward converter,
  often used in isolated industrial and telecom applications. That is, until now. The LTC В®3706 secondary-side
  synchronous controller and its companion smart gate
  driver, the LTC3725, make it possible to create an isolated
  forward converter with the simplicity and performance
  of a buck converter.
  Simple Isolated 3.3V, 30A Forward Converter
  Many isolated supplies place the controller IC on the
  input (primary) side and rely on indirect synchronous VIN+
  1ОјF
  100V
  w2 1ОјF
  100V Si7450DP FDC2512
  365k 2t
  4 t 10 3t …

Articles

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  Isolated Forward Controllers Offer Buck Simplicity and Performance &mdash LT Journal
  PDF, 340 Kb, File published: Jan 28, 2008
  Extract from the document

  L DESIGN FEATURES Isolated Forward Controllers Offer
  Buck Simplicity and Performance
  by Charles Hawkes and Arthur Kelley Buck converter designers have long
  benefited from the simplicity, high
  efficiency and fast transient response
  made possible by the latest buck
  controller ICs, which feature synchronous rectification and PolyPhaseВ®
  operation. Unfortunately, these
  same features have been difficult or
  impossible to implement in the buck
  converter’s close relative, the forward
  converter. That is, until now. The
  LTC3706/26 secondary-side synchronous controller and its companion
  smart gate driver, the LTC3705/25,
  make it possible to create an isolated
  forward converter with the simplicity
  and performance of the familiar buck
  converter. rectifier timing and optoisolator feedback to control the output (secondary).
  This architecture is commonly known
  as primary-side control. By contrast,
  secondary-side control places the
  controller IC on the secondary side,
  and uses a gate-drive transformer …

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Manufacturer's Classification

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

Other Names:

LTC3705IGNTRPBF, LTC3705IGN TRPBF