NCP1246BLD065R2G

AC DC Converters, Offline Switchers Overview

The NCP1246BLD065R2G is a fixed-frequency current mode controller for flyback converters, manufactured by onsemi. It operates at a switching frequency of 65 kHz and features dynamic self-supply to simplify auxiliary power design. The device includes integrated high-voltage startup, dark light detection, and frequency modulation for efficiency optimization. It supports SOIC-7 packaging and functions within a junction temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Dynamic self-supply functionality simplifies auxiliary supply design during startup and transient conditions.
• Integrated high-voltage detector detects AC input disconnection and triggers X2 discharge.
• Frequency modulation optimizes efficiency across the entire load range while maintaining low standby power.
• Timer-based overload protection ensures robust fault handling with latch or auto-recovery options.

AC DC Converters, Offline Switchers Applications

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

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'LD' against official datasheets to confirm pinout and feature variations compared to standard variants. Ensure compatibility with SOIC-7 footprints in PCB layout. Confirm RoHS compliance status through manufacturer documentation prior to integration.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring fixed-frequency operation at 65 kHz. Consider its dynamic self-supply capability if minimizing external components is a priority. Evaluate thermal performance requirements given the wide operating temperature range up to 150°C junction temperature.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1246 series of current mode controllers designed for offline flyback applications. It shares architectural similarities with other members like NCP1246BD065R2G but may differ in specific package or feature configurations defined by the suffix.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1246BD065R2G is listed as a related product. Verify functional equivalence and pin compatibility before substitution. Other NCP1246 variants may require schematic adjustments due to differing protection modes or packages.