NCP1129BP100G

AC DC Converters, Offline Switchers Overview

The NCP1129BP100G is a high-voltage switching regulator designed for offline power supplies using flyback topology. It integrates an internal switch with a breakdown voltage of 650V and operates at a switching frequency of 100kHz. The device supports a maximum output power of 43W and features auto-recovery protection against overload, over-temperature, over-voltage, and short-circuit conditions. It requires a startup voltage of 17V and functions within a Vcc range of 8.8V to 35V. Packaged in a 7-pin PDIP, it operates across a junction temperature range of -40°C to 150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage internal switch for compact offline converter designs
• Provides comprehensive fault protection including overload, thermal, and short-circuit safeguards
• Features auto-recovery mechanism to handle transient fault conditions without latching off

AC DC Converters, Offline Switchers Applications

• Offline switched-mode power supplies (SMPS)
• High-voltage AC/DC conversion circuits
• Flyback topology power adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized channels as the part status is obsolete. Confirm package integrity and pin alignment for the 7-PDIP form factor. Check for RoHS compliance documentation if required by specific regulatory standards. Ensure replacement strategies are evaluated due to discontinuation status.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring integrated high-voltage switching with built-in protection mechanisms. Consider the 650V breakdown rating and 100kHz frequency for appropriate transformer design. Evaluate the 43W power capability against load requirements. Verify compatibility with the 7-PDIP footprint during PCB layout.

AC DC Converters, Offline Switchers Part Context

This device belongs to the NCP1129 series of high-voltage switchers from onsemi. It is part of a family of offline regulators designed for cost-effective and reliable power supply implementations. The series typically includes variants with similar electrical characteristics but potentially different packaging or minor parameter adjustments.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1124BP100G and NCP1126AP100G are related parts within the same product family. Verify electrical compatibility and pinout correspondence before substitution. Note that these alternatives may have different power ratings or specific feature sets.