NCP1380DDR2G

AC DC Converters, Offline Switchers Overview

The NCP1380DDR2G is a high-performance quasi-resonant current-mode PWM controller designed for universal off-line power supplies. It utilizes a proprietary valley-lockout system to ensure switching events occur in the drain-source voltage valley, reducing switching losses and electromagnetic interference. The device supports flyback topology with an output current capability of 800 mA and operates within a supply voltage range of 9V to 28V. It features frequency foldback at light loads to enhance efficiency and includes comprehensive protection mechanisms such as over-power protection (OPP) and short-circuit protection.

AC DC Converters, Offline Switchers Feature Summary

• Valley-switching operation with valley-lockout for noise-immune performance
• Frequency foldback at light load to improve efficiency
• Adjustable over-power protection circuit
• Integrated fixed internal timer for short-circuit protection

AC DC Converters, Offline Switchers Applications

• Universal off-line AC-DC adapters
• High-power offline power supplies
• Flyback converter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against official documentation to confirm protection behavior. Options A and C utilize latched output short-circuit protection requiring manual reset, while options B and D feature auto-recovery mode. Confirm that the selected variant aligns with the required fault response strategy for the target application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring high efficiency across varying load conditions. The integrated valley-lockout mechanism simplifies design by ensuring zero-voltage switching without complex external timing circuits. Ensure the external MOSFET can withstand the peak currents driven by the controller's output stage during operation.

AC DC Converters, Offline Switchers Part Context

This controller belongs to the NCP1380 series from onsemi, engineered specifically for high-efficiency power conversion. It addresses the need for low standby power consumption in modern electronic devices while maintaining robust performance under heavy load conditions through advanced current-mode control techniques.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pin compatibility and electrical specifications before replacing existing components in established designs.