NCP1601APG

Overview

The NCP1601APG is a power factor correction controller designed for discontinuous conduction mode (DCM) and critical conduction mode (CRM). It operates in voltage mode with a fixed switching frequency. The device features low startup current of 17 µA typical and shutdown current of 24 µA typical. It includes programmable overcurrent protection, overvoltage protection at 107% of nominal output, and undervoltage lockout. Thermal shutdown activates at 140°C junction temperature. The component supports synchronous operation via an external digital signal input.

Feature Summary

• Supports both DCM and CRM operating modes to balance EMI noise and peak current limits
• Integrates comprehensive protection including overvoltage, undervoltage, overcurrent, and thermal shutdown
• Enables synchronous mode operation through external digital signal interface

Applications

• Electronic ballasts
• AC adapters
• TV power supplies
• Surveillance equipment power stages

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required UVLO hysteresis characteristics, as variants exist with different thresholds. Confirm RoHS compliance status and availability directly with authorized distributors or the manufacturer before finalizing procurement plans.

Selection Notes

Select this controller for applications requiring high efficiency in mid-power PFC designs. The choice between NCP1601A and B depends on the required UVLO hysteresis level. Consider the fixed frequency operation for predictable EMI filtering requirements. Evaluate the thermal management needs given the 140°C thermal shutdown threshold and the specific operating temperature range of the target application environment.

Part Context

This component belongs to the NCP1601 series of power factor correction controllers from onsemi. It is engineered for AC-DC offline switching applications. The series provides solutions for compact power factor correction pre-regulators. It addresses standards for input current harmonic limitations. The device integrates control logic for efficient power conversion in consumer electronics.

Replacement Considerations

Check for NCP1601ADR2G or NCP1601AP as potential pin-compatible alternatives. Verify functional equivalence regarding UVLO hysteresis differences between A and B variants. Ensure any substitute maintains the same DCM/CRM operational capabilities and protection feature set.