PFS728EG

Overview

The PFS728EG is a HiperPFS-3 device integrating a continuous conduction mode (CCM) boost PFC controller, gate driver, and high voltage power MOSFET in a single low-profile eSIP package. It provides near unity input power factor and eliminates the need for external current sense resistors. The device features an innovative control technique that adjusts switching frequency over output load, input line voltage, and input line cycle to maximize efficiency across the entire load range, particularly at light loads. This wide-bandwidth spread spectrum effect significantly minimizes EMI filtering requirements.

Feature Summary

• Integrates CCM boost PFC controller, gate driver, and high voltage power MOSFET in a single low-profile eSIP package
• Eliminates external current sense resistors and associated power loss through innovative control techniques
• Adjusts switching frequency dynamically to maximize efficiency across the entire load range, especially at light loads
• Minimizes EMI filtering requirements via wide-bandwidth spread spectrum effect

Applications

• PC power supplies
• High-power adapters
• Printers
• High-power LED lighting
• LCD TVs

Procurement Notes

Verify the specific suffix of the part number against official datasheets to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required package type and voltage ratings for your design. Cross-reference with Power Integrations' latest documentation to confirm availability and any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when designing AC-DC converters requiring high efficiency and low EMI without external current sensing. It is suitable for applications needing near unity power factor and compact form factors. Consider the integrated protection features and dynamic frequency adjustment for robust performance across varying load conditions and input voltages.

Part Context

The PFS728EG belongs to the HiperPFS-3 family from Power Integrations. This series combines PFC control and power switching in one device, simplifying design and reducing component count. It is designed for universal input applications, offering high reliability and efficiency in a small footprint, making it ideal for space-constrained consumer and industrial electronics.

Replacement Considerations

Check for direct pin-compatible substitutes within the HiperPFS-3 or HiperPFS-4 families. Verify if higher or lower power variants offer equivalent functionality with improved thermal or electrical performance. Consult official substitution guides for confirmed alternatives.