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IW1689 - Low-Power Off-line Digital PWM Controller

General Description

The iW1689 is a high performance AC/DC power supply controller which uses digital control technology to build sensorless peak current mode PWM flyback power supplies.

Key Features

  • Primary-side feedback eliminates opto-isolators and simplifies design.
  • Multi-mode operation for highest overall efficiency.
  • Very tight output voltage regulation.
  • No external compensation components required.
  • Complies with CEC/EPA/IEC no load power consumption and average efficiency regulations.
  • Built-in secondary constant-current control with primaryside feedback.
  • Low start-up current (8 µA typical).
  • Built-in soft s.

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Datasheet Details

Part number IW1689
Manufacturer iWatt
File Size 730.31 KB
Description Low-Power Off-line Digital PWM Controller
Datasheet download datasheet IW1689 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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Not Recommended For New Designs iW1689 Low-Power Off-line Digital PWM Controller 1.0 Features • Primary-side feedback eliminates opto-isolators and simplifies design • Multi-mode operation for highest overall efficiency • Very tight output voltage regulation • No external compensation components required • Complies with CEC/EPA/IEC no load power consumption and average efficiency regulations • Built-in secondary constant-current control with primaryside feedback • Low start-up current (8 µA typical) • Built-in soft start • Built-in short circuit protection • AC line under/overvoltage and output overvoltage protection • Fixed switching frequency • Available in a space-saving SOT-23 package 2.