PFS7328H

Overview

The PFS7328H is a high-voltage switcher from Power Integrations' PFS family, integrating a current-mode controller, power MOSFET, and start-up circuit into a single package. It operates in boundary conduction mode to achieve high efficiency across varying load conditions. The device incorporates comprehensive protection features including overvoltage, overcurrent, and thermal shutdown to ensure robust system reliability. Designed for universal AC input applications, it simplifies power supply design by reducing component count and board space requirements while maintaining compliance with energy efficiency standards.

Feature Summary

• Integrated high-voltage power MOSFET and control circuitry
• Boundary conduction mode operation for enhanced efficiency
• Built-in overvoltage, overcurrent, and thermal protection mechanisms

Applications

• Universal AC-DC adapters
• Standby power supplies for consumer electronics
• Battery chargers for portable devices

Procurement Notes

Verify the specific suffix code on the datasheet to confirm pinout compatibility and temperature range before procurement. Ensure that the ordering part number matches the exact voltage rating and package type required for your PCB layout. Cross-reference the manufacturer's latest documentation to confirm availability of the specific variant, as suffixes may indicate minor manufacturing revisions or regional certifications.

Selection Notes

Select this component when minimizing external components is critical for cost and size reduction. It is suitable for applications requiring moderate power levels where high efficiency at light loads is necessary. Consider the thermal performance of the package relative to the expected ambient temperature and load profile. Ensure the input voltage range aligns with the target market's electrical standards.

Part Context

This part belongs to the PFSwitch family, which combines a flyback converter controller with a high-voltage MOSFET. The series is designed to replace discrete solutions, offering a compact alternative for low-to-medium power applications. The technology focuses on reducing electromagnetic interference and improving power factor without complex auxiliary circuits.

Replacement Considerations

Check for direct replacements within the same PFS family with different suffixes for updated packaging or certification. Verify pin-for-pin compatibility if substituting with other integrated switchers from different manufacturers. Ensure the replacement maintains the same voltage rating and current handling capabilities.