NCP1217AD133R2

AC DC Converters, Offline Switchers Overview

The NCP1217AD133R2 is an offline switch controller designed for flyback topology applications. It operates at a switching frequency of 133 kHz and supports a maximum duty cycle of 46.5%. The device functions within a supply voltage range of 10 V to 16 V, with a startup voltage threshold of 12.8 V. It is housed in an 8-SOIC package (0.154 inch width) and is rated for junction temperatures between 0°C and 150°C. This component integrates current-mode PWM control without an internal power switch.

AC DC Converters, Offline Switchers Feature Summary

• Implements current-mode pulse width modulation control for stable regulation
• Includes integrated protection mechanisms for overload, over-temperature, and short-circuit conditions
• Designed for isolated offline AC-DC converter topologies

AC DC Converters, Offline Switchers Applications

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

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D133' confirms the 133 kHz switching frequency variant, as other suffixes like 'D65' indicate different frequencies. Confirm RoHS compliance status, as datasheets may list non-compliance for older revisions. Check for active obsolescence notices or PCN documents from onsemi regarding end-of-life status before finalizing procurement plans.

AC DC Converters, Offline Switchers Selection Notes

Select this component when a fixed 133 kHz switching frequency is required for EMI management in flyback converters. Ensure the design accommodates the 8-SOIC thermal requirements given the 150°C junction temperature limit. Verify that the external MOSFET selection matches the controller's drive capabilities and that the input voltage range aligns with the 10 V to 16 V Vcc operating window.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1217 family of current-mode PWM controllers. It shares functional similarities with the NCP1216 series but differs in switching frequency specifications. The 'D133' designation specifically identifies the 133 kHz version, distinguishing it from the 65 kHz variants found in the same product line.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.