NCP1248AD100R2G

AC DC Converters, Offline Switchers Overview

The NCP1248AD100R2G is a fixed-frequency current mode controller for offline flyback converters. It operates at a switching frequency of 100 kHz and supports a maximum duty cycle of 85%. The device functions within a supply voltage range of 9.3 V to 28 V, with a startup threshold of 12 V. It features comprehensive protection mechanisms including overload, over-power, over-temperature, and over-voltage protection. The component is housed in a 7-SOIC package and is rated for junction temperatures between -40°C and 150°C.

AC DC Converters, Offline Switchers Feature Summary

• Fixed-frequency current mode control architecture optimized for flyback topologies
• Integrated high-voltage startup current source simplifies auxiliary supply design
• Multi-layer protection system ensuring reliability under fault conditions

AC DC Converters, Offline Switchers Applications

• Offline AC-DC power supplies
• Flyback converter designs
• General purpose isolated power conversion

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D100' confirms the 100 kHz fixed frequency variant. Confirm RoHS compliance status as indicated in official documentation. Check for any Product Change Notifications (PCN) regarding packaging or manufacturing site changes. Ensure the 7-SOIC package dimensions match your PCB footprint requirements. Validate that the operating temperature range meets your application's thermal constraints.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a fixed 100 kHz switching frequency to simplify EMI filter design. The integrated startup current source reduces external component count compared to variable frequency alternatives. Ensure the input voltage range aligns with the 9.3 V to 28 V operating window. Consider the 7-SOIC package size for space-constrained layouts. Verify that the internal protections cover all expected fault scenarios for the target system.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP124x series of current mode controllers from onsemi. It shares architectural similarities with the NCP1240 but is distinguished by its fixed 100 kHz operation. The series targets cost-sensitive offline power applications where predictable switching behavior is required. It complements other flyback controllers offering variable frequency or higher power capabilities.

AC DC Converters, Offline Switchers Replacement Considerations

The NCP1240AD100R2G is a functional substitute within the same family, sharing the 100 kHz fixed frequency and 7-SOIC package. Verify pin-to-pin compatibility and identical protection thresholds before substitution. Other NCP124x variants may differ in switching frequency or startup characteristics.