NCP1239ID65R2G

AC DC Converters, Offline Switchers Overview

The NCP1239ID65R2G is a fixed frequency current-mode controller for flyback converters, operating at a switching frequency of 65 kHz. It features a maximum duty cycle of 84% and supports an output current of 500 mA. The device operates within a supply voltage range of 8.8 V to 35 V, with a startup voltage of 12 V. It functions reliably across a temperature range of -40°C to +125°C (TJ). Packaged in a 7-SOIC format, it includes shutdown functionality and offers protection against overcurrent, overload, overtemperature, and overvoltage conditions.

AC DC Converters, Offline Switchers Feature Summary

• Dynamic self-supply capability activates an internal start-up current source during start-up, transients, latch-up, and standby periods to simplify auxiliary power requirements.

AC DC Converters, Offline Switchers Applications

• Offline flyback converter designs
• AC-DC power supplies
• Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D65' confirms the 65 kHz fixed frequency operation and industrial temperature grade (-40°C to +125°C) as distinct from other variants like LD100 or HD65. Confirm RoHS compliance status via the manufacturer's official documentation before finalizing procurement specifications.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a fixed-frequency current-mode control strategy with integrated dynamic self-supply to reduce external component count. Ensure the design accommodates the 7-SOIC package thermal constraints and that the input voltage range aligns with the 8.8 V to 35 V operating window.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1239 series of fixed frequency current-mode controllers designed for offline flyback applications. The series differentiates models by switching frequency and temperature rating, with the ID65 variant specifically targeting industrial environments with a 65 kHz operation point.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1239ED65R2G: Similar 65 kHz controller but rated for commercial temperature range (-40°C to +85°C typically, verify datasheet). NCP1239HD65R2G: 65 kHz controller with isolated output configuration options; verify pinout compatibility.