INN2904K

AC DC Converters, Offline Switchers Overview

The INN2904K is a high-voltage integrated AC/DC converter from the InnoSwitch-EP series, designed for industrial applications requiring robust performance. It integrates a 900 V MOSFET, primary-side controller, and secondary-side synchronous rectification driver into a single package. The device utilizes FluxLink™ technology to provide isolated feedback without an optocoupler, ensuring precise regulation across multiple outputs. It supports flyback topology with input voltage ranges suitable for 380V industrial systems.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 900 V rated MOSFET with primary-side control and secondary-side synchronous rectification drivers in a compact surface-mount package.
• Employs FluxLink™ capacitive coupling technology to replace traditional optocouplers, enabling precise cross-regulation for multi-output designs.
• Provides comprehensive protection features including output overvoltage clamping, overcurrent protection, and thermal shutdown.
• Features enhanced insulation capabilities with isolation voltages exceeding 4,000 VAC, meeting strict safety standards.

AC DC Converters, Offline Switchers Applications

• Industrial power supplies operating on 380V AC input
• Embedded dual-output power systems
• High-density offline flyback converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix code (e.g., Q for automotive qualification if required) against the official datasheet, as standard versions may differ. Confirm package type availability matches your PCB footprint requirements. Ensure design compliance with UL1577 and TUV EN60950 safety certifications specified for this component family.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing for 380V industrial inputs where standard 725V chips lack sufficient voltage headroom. The integrated synchronous rectification improves efficiency compared to diode-based solutions. Consider the thermal management requirements of the eSOP-R16B package for high-power density implementations.

AC DC Converters, Offline Switchers Part Context

Part of the InnoSwitch-EP series, which targets high-reliability embedded and industrial markets. This series distinguishes itself by combining high-voltage GaN or Si MOSFETs with advanced digital control loops. The EP designation typically indicates extended performance or specific industrial ruggedization features within the broader InnoSwitch portfolio.

AC DC Converters, Offline Switchers Replacement Considerations

Direct pin-to-pin replacements are limited due to the unique 900V integration. Review InnoSwitch-EP variants with different voltage ratings or power levels. Consult PI Expert software for transformer-compatible alternatives within the same family.