SG6961SY

Overview

The SG6961SY is an 8-pin boundary mode Power Factor Correction (PFC) controller IC designed for controlling PFC pre-regulators. It utilizes a controlled on-time architecture to manage power factor correction in AC-DC conversion systems. The device operates within a supply voltage range of 10.5 V to 20 V, with a nominal input of 15 V. Packaged in an 8-SOIC (SOP8) case with a narrow body width of 3.90 mm, it supports Pulse Width Modulation (PWM) control techniques. This component is part of the Fairchild Semiconductor product line, now under onsemi.

Feature Summary

• Implements boundary mode operation for efficient power factor correction
• Utilizes controlled on-time architecture for precise current regulation
• Designed as a compact solution for industrial and consumer AC-DC applications

Applications

• Power factor correction pre-regulators
• AC-DC power supplies
• Industrial power management systems

Procurement Notes

Verify the manufacturer designation, as the SG6961 series originated from Fairchild Semiconductor before being acquired by onsemi. Confirm the specific suffix 'SY' corresponds to the required package variant and tape-and-reel configuration if applicable. Ensure compliance with RoHS and lead-free status requirements for your assembly process. Cross-reference the datasheet version to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when a boundary mode PFC controller is required for high-efficiency power factor correction. The controlled on-time feature simplifies design implementation compared to fixed-frequency controllers. Consider the 8-SOIC package constraints for thermal management and PCB layout. Evaluate the operating voltage range against your system's standby and active supply rails to ensure stable controller operation across all load conditions.

Part Context

The SG6961 series represents a family of boundary mode PFC controllers originally developed by Fairchild Semiconductor. These devices are engineered to improve energy consumption and power quality in switching power supplies. The SG6961SY specifically denotes the SOIC package variant within this lineup, offering a robust solution for meeting regulatory standards regarding harmonic distortion and power factor in electronic equipment.

Replacement Considerations

The SG6961SZ is a documented alternative within the same series, typically differing in packaging or reel specifications rather than core functionality. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution. No other direct cross-manufacturer substitutes are confirmed in public documentation.