NCP1239QD65R2G

AC DC Converters, Offline Switchers Overview

The NCP1239QD65R2G is a fixed-frequency current-mode controller designed for flyback converter applications. It features a high-voltage start-up current source to ensure quick and lossless power-on sequences. The device operates with a switching frequency of 65 kHz and supports a maximum duty cycle of 84%. It functions within an operating supply voltage range of 8.8 V to 35 V, delivering an output current capability of 500 mA. The component is rated for operation between -40°C and +150°C. It utilizes SOIC-7 packaging and includes shutdown functionality.

AC DC Converters, Offline Switchers Feature Summary

• Fixed-frequency current-mode control architecture
• High-voltage start-up current source for efficient power-on
• Integrated shutdown pin for power management

AC DC Converters, Offline Switchers Applications

• Flyback converter designs
• High-efficiency power supply systems
• Industrial and commercial camera power circuits

AC DC Converters, Offline Switchers Procurement Notes

Verify the Q suffix indicates automotive or qualified grade status against official onsemi documentation. Confirm RoHS compliance details via the manufacturer datasheet. Check for NRND status if applicable to long-term availability planning. Ensure the SOIC-7 package matches PCB footprint requirements. Validate temperature ratings against specific application environmental constraints.

AC DC Converters, Offline Switchers Selection Notes

Select this component for flyback topologies requiring fixed-frequency current-mode control. The high-voltage start-up feature simplifies bias circuit design by eliminating external start-up resistors. Verify that the 65 kHz switching frequency aligns with electromagnetic interference requirements. Ensure the 8.8 V to 35 V supply range covers the input voltage specifications of the target system.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1239 series from onsemi, which provides fixed-frequency current-mode controllers for flyback converters. The series is characterized by high-voltage start-up capabilities and low operating current. The NCP1239Q variant specifically targets applications requiring qualified components, often in automotive or industrial sectors, maintaining the core electrical characteristics of the standard NCP1239 family.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1239CD65R2G and NCP1239LD100R2G are related parts within the same family. Verify if the Q suffix qualification is mandatory for the end application before substituting with non-Q variants.