NCP1129AP65G

AC DC Converters, Offline Switchers Overview

The NCP1129AP65G is a high voltage switching regulator designed for offline switched-mode power supplies (SMPS). It integrates a fixed-frequency peak current mode controller with a low on-resistance 650 V MOSFET. The device operates within a supply voltage range of 16 V to 20 V and features a switching frequency of 65 kHz with a maximum duty cycle of 84%. It draws a typical operating supply current of 2.1 mA. The component is housed in a PDIP-7 package, supports through-hole mounting, and functions reliably across an extended temperature range from -40°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a fixed-frequency peak current mode controller with a 650 V MOSFET
• Designed specifically for high voltage offline SMPS applications
• Operates within a wide industrial temperature range

AC DC Converters, Offline Switchers Applications

• Offline Switched Mode Power Supplies
• High Voltage AC/DC Converters

AC DC Converters, Offline Switchers Procurement Notes

This component is officially listed as discontinued by the manufacturer. Availability is restricted to secondary market suppliers or distributors holding existing stock. Verification of part authenticity and lot traceability is critical when sourcing from non-original channels. Ensure that any available units meet original specifications before integration into designs.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching capabilities in a through-hole package. The fixed 65 kHz frequency simplifies magnetic component selection. Verify compatibility with the required input voltage range and thermal management needs for the PDIP-7 form factor. Consider end-of-life status for long-term production planning.

AC DC Converters, Offline Switchers Part Context

The NCP1129AP65G belongs to the NCP112x series from onsemi, which includes similar high-voltage switcher variants such as the NCP1124 and NCP1126. These parts share common architectural features like integrated 650 V MOSFETs and peak current mode control, targeting cost-effective offline power conversion solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the part is discontinued, alternative components must be selected based on functional equivalence rather than direct cross-reference data.