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Design Notes

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  Monolithic Converter Delivers High Output Voltages &mdash DN545
  PDF, 285 Кб, Файл опубликован: 4 ноя 2015
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  advertisement Monolithic Converter Delivers High Output Voltages
  Design Note 545
  Jesus Rosales Introduction
  Industrial, telecom, medical and automotive applications use a wide variety of regulated voltages to
  operate effectively, including high voltage and negative rails. When the designer is faced with producing
  industrial power supplies, the job can be simplified by
  minimizing the parts count, as well as the number of
  required controller ICs. The LTВ®8331 achieves both of
  these goals with an integrated 140V, 500mA switch,
  programmable frequency, ultra-quiescent current and
  light load Burst Mode В® operation. A high voltage negative output rail can easily be
  attained by configuring the converter as shown in
  FigureВ 2. This converter allows full switch voltage
  utilization to produce a negative output, by adding a
  capacitor and a diode. A coupling capacitor, C5, adds
  input to output disconnect during shutdown, similar
  to a CUK converter.
  FigureВ 3 shows a CUK converter using the LT8331, and
  FigureВ 4 shows the efficiency curve for this inverter
  with a 12V input. Efficiency for this converter peaks
  at 84%. Burst Mode operation kicks in when the load
  drops to about 40mA, which allows the converter to
  maintain a respectable efficiency level of 73% even …

Модельный ряд

Классификация производителя

• Power Management > Switching Regulator > Inverting Regulators | SEPIC Regulators | Flyback, Forward and Isolated Controllers
• Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost

Варианты написания:

LT8331IMSETRPBF, LT8331IMSE TRPBF