NCP1937C61DR2G

Overview

The NCP1937C61DR2G is a Power Factor Correction (PFC) controller from onsemi, designed for combo PFC and quasi-resonant flyback applications. It operates within a supply voltage range of 9V to 30V and supports a switching frequency of 250 kHz. The device functions reliably across an extended temperature range from -40°C to +125°C. It features a surface-mount package in the form of a 20-SOIC with a maximum power dissipation of 620 mW and a typical operating supply current of 15 mA.

Feature Summary

• Combines critical conduction mode (CRM) PFC control with quasi-resonant flyback management in a single integrated circuit
• Optimized for high-efficiency power conversion systems requiring simultaneous power factor correction and isolated DC-DC regulation

Applications

• Power supplies for consumer electronics
• Adapters and chargers for mobile devices
• LED lighting drivers

Procurement Notes

Verify the specific suffix C61 against the official onsemi datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the SOIC-20 footprint aligns with your PCB layout constraints. Confirm RoHS compliance status through the manufacturer's material declaration before finalizing procurement.

Selection Notes

Select this component when designing compact power supplies that require integrated PFC and flyback control to reduce bill of materials count. Consider its 250 kHz switching frequency for balancing efficiency and component size. Evaluate thermal performance given the 620 mW power dissipation limit in the SOIC-20 package for your specific ambient conditions.

Part Context

This part belongs to the NCP1937 family of combo controllers from onsemi. Variants such as NCP1937A3DR2G and NCP1937B1DR2G share similar functional architectures but may differ in packaging or specific electrical parameters. The NCP1937 series targets efficient, cost-effective solutions for modern power adapter designs.

Replacement Considerations

NCP1937A3DR2G and NCP1937B1DR2G are related variants within the same product family. Verify pin compatibility and specific electrical tolerances before substitution.