NCP1622BCASNT1G

Overview

The NCP1622BCASNT1G is an enhanced power factor controller from onsemi, designed for high-efficiency PFC boost stages. It utilizes valley-synchronized frequency foldback (VSFF) to operate in critical conduction mode (CRM) at nominal loads and linearly reduces switching frequency down to approximately 30 kHz under light loads. This mechanism minimizes standby losses while maintaining consistent power factor. The device features a TSOP-6 surface-mount package, operates within a temperature range of -40°C to +125°C, and supports a maximum power dissipation of 550 mW.

Feature Summary

• Implements valley-synchronized frequency foldback to optimize efficiency across varying load conditions
• Maintains near-constant power factor during low-frequency operation modes
• Operates in critical conduction mode with minimal external component requirements

Applications

• Power factor correction boost stages in offline power supplies
• High-efficiency AC-DC conversion systems
• Consumer electronics requiring low standby power consumption

Procurement Notes

Verify the specific suffix 'BCA' against the official onsemi datasheet to confirm pinout compatibility and functional specifications. Ensure the ordering part number matches the exact tape-and-reel or cut-tape packaging requirements for your assembly process. Cross-reference the RoHS compliance status and material declarations with current trade compliance documents before finalizing procurement.

Selection Notes

Select this component when designing PFC circuits that demand high efficiency at both full and light loads. The VSFF feature makes it suitable for applications where minimizing standby power is critical. Consider the TSOP-6 package constraints and thermal dissipation limits of 550 mW during layout design. Validate that the operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the NCP1622 series of power factor controllers, which are engineered for enhanced performance in AC-DC power conversion. The series focuses on reducing electromagnetic interference and improving overall system efficiency through advanced control algorithms. It serves as a key component in modern power supply designs aiming to meet stringent energy efficiency regulations.

Replacement Considerations

NCP1622BECSNT1G