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ML4818 - Phase Modulation/Soft Switching Controller

General Description

The ML4818 is a complete phase modulation control IC suitable for full bridge soft switching converters.

Unlike conventional PWM circuits, the phase modulation technique allows for zero-voltage switching transitions and square wave drive across the transformer.

Key Features

  • Full bridge phase modulation zero voltage switching circuit with programmable ZV transition times.
  • Constant frequency operation to 500kHz.
  • Current mode operation.
  • Cycle-by-cycle current limiting with integrating fault detection and restart delay.
  • Precision buffered 5V reference (+1%).
  • Four 1.5A peak current totem-pole output drivers.
  • Under-voltage lockout circuit with 6V hysteresis.
  • Power DIP package General.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.fairchildsemi.com ML4818 Phase Modulation/Soft Switching Controller Features • Full bridge phase modulation zero voltage switching circuit with programmable ZV transition times • Constant frequency operation to 500kHz • Current mode operation • Cycle-by-cycle current limiting with integrating fault detection and restart delay • Precision buffered 5V reference (+1%) • Four 1.5A peak current totem-pole output drivers • Under-voltage lockout circuit with 6V hysteresis • Power DIP package General Description The ML4818 is a complete phase modulation control IC suitable for full bridge soft switching converters. Unlike conventional PWM circuits, the phase modulation technique allows for zero-voltage switching transitions and square wave drive across the transformer.