NCP1623ADR2G

Overview

The NCP1623ADR2G is a continuous conduction mode (CRM) power factor correction controller manufactured by onsemi. It operates in an SOIC-8 package and supports variable current mode step-up topologies with a maximum input voltage of 30 V. The device integrates valley synchronized frequency fold-back for optimized efficiency across load ranges. Key electrical parameters include a switching frequency range of 500 kHz to 800 kHz and a maximum duty cycle of 85%. It features zero-current detection capabilities and secondary side overvoltage protection.

Feature Summary

• Integrates valley synchronized frequency fold-back to optimize efficiency across varying load conditions
• Includes follower boost functionality to enhance performance at low input voltages
• Supports drain-based zero-current detection for improved stability in non-auxiliary winding designs
• Offers selectable packaging options including SOIC-8

Applications

• Fast charger power supplies
• LCD television power supply units
• Electronics requiring compliance with EN61000-3-2 standards for input power above 75W
• Power supplies targeting 80 Plus Gold efficiency ratings

Procurement Notes

Verify the specific suffix 'ADR2G' against official onsemi documentation to confirm pinout and thermal characteristics. Confirm that the SOIC-8 package variant matches your PCB footprint requirements. Ensure design compatibility with CRM operation modes before finalizing procurement decisions.

Selection Notes

Select this component when designing power factor correction circuits requiring high efficiency under light loads. The integrated valley synchronized frequency fold-back makes it suitable for applications demanding strict efficiency standards like 80 Plus Gold. Consider its compatibility with existing NCP1622 designs if a direct upgrade path is needed without schematic changes.

Part Context

This part belongs to the NCP1623 series of CRM PFC controllers from onsemi. It serves as a successor to the NCP1622, offering enhanced features such as follower boost and improved light-load efficiency through disabled low sleep mode current functions. The series addresses modern power supply demands for higher efficiency and stricter regulatory compliance.

Replacement Considerations

The NCP1623ADR2G can replace the NCP1622 in existing designs without schematic modifications, utilizing the same 160W demonstration board layout. Verify that the target application benefits from the added follower boost feature and updated protection mechanisms.