NCP1339FDR2G

AC DC Converters, Offline Switchers Overview

The NCP1339FDR2G is a high-voltage quasi-resonant flyback controller manufactured by onsemi. It operates within a supply voltage range of 10 V to 28 V with a typical operating current of 1.6 mA. The device supports a switching frequency of 25 kHz and delivers a maximum duty cycle of 10%. It provides an output voltage of 12 V and can source up to 800 mA. The component functions in non-isolated configurations and features rise and fall times of 40 ns and 20 ns, respectively. It is housed in a SOIC-14 package and is rated for operation between -40°C and +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Implements high-voltage quasi-resonant control for efficient flyback power conversion
• Integrates shutdown functionality for enhanced power management
• Designed for surface-mount installation in compact electronic assemblies

AC DC Converters, Offline Switchers Applications

• Offline power supplies utilizing flyback topology
• Consumer electronics requiring efficient AC-DC conversion
• Industrial equipment power stages

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix DR2G against official datasheets to confirm packaging and tape-and-reel specifications. Confirm RoHS compliance status through manufacturer documentation. Check for End-of-Life notices as availability may be restricted. Ensure the ordering part number matches the required pinout and thermal characteristics for your design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a dedicated quasi-resonant flyback controller with integrated high-voltage startup. Evaluate the 10% maximum duty cycle constraint against input voltage ranges. Consider the SOIC-14 footprint for PCB layout compatibility. Verify that the 800 mA output capability meets gate drive requirements for the intended power switch.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1339 series of off-line controllers from onsemi. It is categorized under PMIC switching controllers. The JDR2G variant shares similar electrical characteristics but may differ in packaging or lot traceability. Both are designed for offline applications.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1339JDR2G is a confirmed substitute within the same series. Verify pin compatibility and parameter tolerances before implementation.