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iW1781 - AC/DC Digital Quasi-Resonant PWM Controller

General Description

The iW1781 is a high performance AC/DC power supply controller for rapid charge that uses digital control technology to build peak-current mode PWM flyback power supplies.

Key Features

  • The iW1781 can achieve tight multi-level constant voltage and multi-level constant current regulation without a traditional secondary-feedback circuit. It also eliminates the need for loop compensation components while maintaining stability over all operating conditions. The iW1781 supports USB Power Delivery (USB PD) and other proprietary rapid charging protocols with secondaryto-primary digital communication handled by secondary-side rapid charge interface circuits, including third party ICs.

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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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iW1781 Rapid Charge™ AC/DC Digital Quasi-Resonant PWM Controller with High Resolution Voltage/Current Control 1 Description The iW1781 is a high performance AC/DC power supply controller for rapid charge that uses digital control technology to build peak-current mode PWM flyback power supplies. The device operates in quasi-resonant mode to provide high efficiency and a number of key built-in protection features. The iW1781 can achieve tight multi-level constant voltage and multi-level constant current regulation without a traditional secondary-feedback circuit. It also eliminates the need for loop compensation components while maintaining stability over all operating conditions.