PFS7633H

Overview

The PFS7633H is a HiperPFS-3 family power factor correction controller designed for high-performance AC-DC conversion. It integrates a critical conduction mode (CrM) PFC controller with a high-voltage switched capacitor startup circuit and a precision analog-to-digital converter (ADC). The device supports continuous output power up to 435 W at 230 V input. Key electrical parameters include an operating voltage range of 90 V to 264 V, a maximum switching frequency of 150 kHz, and a peak current limit of 0.74 A. It features a TO-220-7 package with a maximum junction temperature rating of 150 °C.

Feature Summary

• Integrates critical conduction mode PFC control with a high-voltage startup circuit to minimize external component count.
• Includes a precision ADC for accurate sensing and digital-like control without complex programming.
• Provides comprehensive protection against over-voltage, under-voltage, over-temperature, and short-circuit conditions.

Applications

• High-power LED lighting drivers
• Computer peripheral power supplies
• Telecommunications equipment power stages

Procurement Notes

Verify the specific suffix 'H' indicates the correct package type and thermal characteristics for your design. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the exact pinout and thermal requirements of your PCB layout.

Selection Notes

Select this component for applications requiring high power factor and low total harmonic distortion in the 300–435 W range. Consider the integrated startup circuit if minimizing bill-of-materials complexity is a priority. Evaluate the thermal performance within the TO-220-7 package against your system's heat dissipation capabilities.

Part Context

The PFS7633H belongs to the HiperPFS-3 series from Power Integrations, which combines PFC and DC-DC functions or serves as a standalone PFC stage. This series targets universal input applications, offering high efficiency and reliability. The HiperPFS-3 architecture simplifies design by integrating advanced control algorithms into a single monolithic IC.

Replacement Considerations

Check for direct substitutes within the HiperPFS-3 family, such as the PFS7633L, noting any differences in package style or thermal handling. Verify that alternative components support the same 90–264 V input range and output power requirements.