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Экологический статус

Design Notes

• Скачать
  ОјPower Buck Regulator Safely Rides Through Automotive Load Dumps &mdash DN475
  PDF, 133 Кб, Файл опубликован: 9 дек 2009
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  ВµPower Buck Regulator Safely Rides Through Automotive
  Load Dumps – Design Note 475
  Juan G. Aranda
  Introduction
  When a buck regulator is used in applications where output
  short-circuit and overload conditions occur, the duty cycle
  required to keep the inductor current under control can
  be lower than the regulator’s minimum duty cycle when
  operating at full speed. Therefore, to effectively protect a
  traditional regulator under such conditions, its switching
  frequency must be reduced to a speed that can safely
  handle the maximum expected input voltage.
  In some cases, frequency foldback can help reduce the
  effective duty cycle by reducing the switching frequency
  as the output voltage falls out of regulation. However,
  this technique might not provide enough protection if the
  folded frequency is not low enough. In the end, the duty
  cycle problem imposes a limit on the maximum switching
  frequency at which the regulator can be safely operated,
  especially in automotive applications where the input
  supply can see positive voltages several times higher
  than the normal 12V operating voltage.
  The LTВ®3682 is a new 1A buck regulator that overcomes …

Модельный ряд

Классификация производителя

• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck

Варианты написания:

LT3682EDDTRPBF, LT3682EDD TRPBF