NCP1937A2DR2G

Overview

The NCP1937A2DR2G is a combination power factor correction and quasi-resonant flyback controller designed for adapters. It integrates Critical Conduction Mode (CRM) PFC and QR flyback functions in a single package. The device operates with a switching frequency of 250 kHz and supports a supply voltage range of 9.5 V to 28 V. It features a SOIC-20 package, operates within a temperature range of -40°C to +125°C, and draws a typical operating supply current of 15 mA.

Feature Summary

• Integrates CRM PFC and Quasi-Resonant Flyback control in one IC
• Optimized for high efficiency in adapter applications
• Supports wide input voltage operation ranges

Applications

• AC/DC adapters
• Power supplies
• Chargers

Procurement Notes

Verify the specific suffix 'A2' against the official onsemi datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the SOIC-20 package dimensions align with your PCB layout constraints. Confirm RoHS compliance status through the manufacturer's documentation before finalizing procurement.

Selection Notes

Select this component when a compact solution combining PFC and secondary-side regulation is required. It is suitable for designs prioritizing reduced component count and board space. Consider the 250 kHz switching frequency for thermal management and EMI filtering requirements relative to lower frequency alternatives.

Part Context

This part belongs to the NCP1937 family from onsemi, specifically engineered as a combo controller for power factor correction and quasi-resonant flyback topologies. It targets the adapter market by simplifying the bill of materials and reducing the overall footprint compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.