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  Low Profile Synchronous, 2-Phase Boost Converter Produces 200W with 98% Efficiency &mdash DN455
  PDF, 112 Kb, Archivo publicado: oct 3, 2008
  Extracto del documento

  advertisement Low Profile Synchronous, 2-Phase Boost Converter Produces
  200W with 98% Efficiency – Design Note 455
  by Victor Khasiev
  Introduction
  Automotive audio amplifiers require a high power boost
  converter that is both efficient and compact. High
  efficiency is essential to keep dissipated heat low and
  avoid bulky and expensive heat sinks. The LT3782A
  is a 2-phase synchronous PWM controller, making
  it possible to produce a low profile, high power boost
  supply that achieves 98% efficiency. Output power is 200W continuous and 250W for short
  pulse loads, corresponding to 8.5A continuous current
  and 10.5A pulsed current.
  This circuit comprises three major sections. Two are
  the phase-interleaved power trains, and the third is
  the control circuit.
  Each power train includes an inductor, two switching
  MOSFETs, a synchronous MOSFET and an output
  capacitive п¬Ѓlter. The output п¬Ѓlters are connected
  together in parallel. Schottky diodes D1 and D2 increase
  efficiency during the dead time. A 24V Output Boost Converter at 8.5A
  (Continuous), 10.5A (Peak) from a Car Battery
  Figure 1 shows a boost converter that generates …

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• Monitor, Control and Protection > High Side Switches & MOSFET Drivers

Otros nombres:

LTC4440EMS8E-5PBF, LTC4440EMS8E-5 PBF, LTC4440EMS8E5#PBF, LTC4440EMS8E 5#PBF