NCP1239AD65R2G

AC DC Converters, Offline Switchers Overview

The NCP1239AD65R2G is an offline switcher controller from onsemi, designed for flyback converter topologies. It operates at a fixed switching frequency of 65 kHz and utilizes current-mode control with pulse width modulation. The device supports a supply voltage range of 8.8 V to 35 V and features a startup voltage of 12 V. It offers comprehensive protection mechanisms including overvoltage, overtemperature, overload, and current limiting. The component is housed in a 7-SOIC package and is rated for operation within a junction temperature range of -40°C to 125°C.

AC DC Converters, Offline Switchers Feature Summary

• Implements current-mode control architecture for stable regulation in isolated power supplies.
• Integrates multiple fault protection features including overvoltage, overtemperature, and current limiting.
• Supports flyback topology with fixed frequency operation for simplified design.

AC DC Converters, Offline Switchers Applications

• Offline AC-DC converters
• Flyback power supply designs
• Isolated power management systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'A' against official documentation to confirm functional parameters, as ordering suffixes may indicate variations in electrical characteristics or packaging. Confirm RoHS compliance status through the manufacturer's environmental declaration. Ensure the selected package matches the PCB footprint requirements for the 7-SOIC form factor.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a fixed-frequency flyback controller with integrated protection. Consider the 65 kHz switching frequency for balancing efficiency and size. Verify that the input voltage range aligns with the system's operational requirements. Check for availability of alternative packages if surface mount constraints differ.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1239 series of switching controllers. The series is characterized by its use in offline power conversion applications. The specific model indicates a 65 kHz fixed frequency variant. The series generally targets cost-effective solutions for consumer and industrial power supplies.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1239RD65R2G

AC DC Converters, Offline Switchers FAQ

What is the maximum operating junction temperature?

The maximum operating junction temperature is 125°C.

Does the device include internal switches?

No, the NCP1239AD65R2G is a controller without internal switches.