NCP1079ABP100G

AC DC Converters, Offline Switchers Overview

The NCP1079ABP100G is an enhanced off-line switcher manufactured by onsemi, designed for flyback topology AC/DC conversion. It integrates a high-voltage switched current source and a PWM controller with a fixed switching frequency of 100 kHz. The device supports a maximum duty cycle of 72% and delivers up to 400 mA output current at 14 W power. Operating within a supply voltage range of 6.5 V to 20 V, it features low operating supply current of 1.1 mA. The component is housed in a 7-pin PDIP package and operates reliably between -40°C and +125°C junction temperature.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage switched current source and PWM controller for simplified design
• Includes built-in thermal shutdown and cycle-by-cycle current limiting for protection
• Features fixed frequency operation to minimize electromagnetic interference filtering requirements

AC DC Converters, Offline Switchers Applications

• Adapters for mobile phones and portable devices
• Telecommunication equipment power supplies
• Consumer appliance offline power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'BP100G' against the manufacturer's latest datasheet to confirm pinout and electrical characteristics match the design requirements. Confirm RoHS compliance status as indicated in official documentation. Check for End-of-Life notifications or Product Change Notices that may affect long-term availability and manufacturing continuity before finalizing procurement plans.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring isolated flyback conversion with moderate power levels around 14 W. Ensure the input voltage range aligns with the 6.5 V to 20 V operational limits. Consider the 7-PDIP through-hole package for assembly compatibility. Verify that the 100 kHz switching frequency suits the transformer design and EMI constraints of the target application environment.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP107x series of enhanced off-line switches from onsemi. These devices combine a high-voltage startup circuit with a PWM controller to reduce external component count. The series targets cost-sensitive AC/DC converter designs where efficiency and reliability are critical. The NCP1079 variant specifically offers higher output current capabilities compared to lower-power siblings in the same family.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1079BBP065G is listed as a manufacturer-recommended alternative.