NCP1612A2DR2G

Overview

The NCP1612A2DR2G is an enhanced, high-efficiency power factor correction (PFC) controller from onsemi. It utilizes Current Controlled Frequency Foldback (CCFF) technology to optimize efficiency across the entire load range. The device operates in Critical Conduction Mode (CrM) and features a skip mode for light-load optimization. It is housed in a compact SO-10 package and includes comprehensive protection mechanisms suitable for offline applications requiring strict power factor compliance.

Feature Summary

• Implements Current Controlled Frequency Foldback (CCFF) to maintain near-unity power factor while maximizing efficiency at varying loads.
• Integrates a skip mode that reduces switching activity near line zero-crossings to minimize standby power consumption.
• Supports flexible configuration via the FFcontrol pin to disable skip mode when higher power factor quality is required.

Applications

• Personal computer power supplies
• Offline power factor correction stages
• General-purpose AC-DC conversion systems

Procurement Notes

Verify the specific suffix DR2G against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the SO-10 package. Cross-reference the revision history for any updates to electrical characteristics or recommended operating conditions before finalizing the bill of materials.

Selection Notes

Select this component for designs prioritizing high efficiency in both full-load and light-load scenarios. The CCFF architecture makes it suitable for applications where thermal management is critical. Consider the trade-off between skip mode benefits and potential harmonic distortion if strict power factor standards are mandated without disabling the feature.

Part Context

This part belongs to the NCP1612 series of PFC controllers. Variants within the series, such as NCP1612A1 or NCP1612B, may differ in internal circuitry or pinout configurations. The NCP1612A2DR2G specifically denotes the A2 variant packaged in a reel format, designed for automated surface-mount assembly processes.

Replacement Considerations

Direct substitutes include other NCP1612 variants like NCP1612A1DR2G or NCP1612BDR2G, provided pin compatibility and functional differences are verified. Alternative controllers from other manufacturers require careful evaluation of control algorithms and external component values.