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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

  • a 6V hysteresis with a low starting current to allow off-line start up with a low power bleed resistor. A shutdown function powers down the IC, putting it into a low quiescent state.

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Datasheet Details

Part number ML4818
Manufacturer Micro Linear
File Size 230.68 KB
Description Phase Modulation/Soft Switching Controller
Datasheet download datasheet ML4818 Datasheet

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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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May 1997 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. The IC modulates the phases of the two sides of the bridge to control output power. The ML4818 can be operated in current mode. The delay times for the outputs are externally programmable to allow the zero-voltage switching transitions to take place. Pulse-by-pulse current limit, integrating fault detection, and soft start reset are provided.