NCP1351ADR2G

AC DC Converters, Offline Switchers Overview

The NCP1351ADR2G is an offline switching controller designed for low-power flyback power supplies. It operates within a supply voltage range of 8.9V to 28V and features a startup voltage of 18V. The device utilizes a fixed peak current technique with quasi-fixed ton, optimizing efficiency at light loads. It includes comprehensive fault protection mechanisms such as overcurrent, overload, overpower, and short-circuit protection. The component is housed in an 8-SOIC package and supports surface mount installation.

AC DC Converters, Offline Switchers Feature Summary

• Implements variable switching time current mode control with fixed peak current technology
• Provides integrated protection against short circuits, overloads, and overpower conditions
• Features optimized internal structure for minimal start-up current consumption
• Utilizes negative current sensing to minimize switch noise impact on operation

AC DC Converters, Offline Switchers Applications

• Low-power offline flyback switched-mode power supplies (SMPS)
• Cost-sensitive AC-DC adapter designs
• Power supplies requiring excellent no-load power performance
• Applications needing natural frequency jittering to smooth EMI characteristics

AC DC Converters, Offline Switchers Procurement Notes

Verify the current lifecycle status before procurement, as this specific part number has been reported as obsolete or end-of-life by major distributors. Confirm availability through authorized secondary market suppliers or alternative sources if active production is not confirmed by the manufacturer. Ensure the replacement version matches the required pinout and electrical specifications for your design.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications where cost efficiency and low standby power are critical priorities. It is suitable for designs utilizing the quasi-resonant or fixed-frequency flyback topology. Consider the integrated fault protection features to simplify external circuitry requirements. Evaluate the thermal performance within the specified operating temperature range during the design phase.

AC DC Converters, Offline Switchers Part Context

This component belongs to the NCP1351 series of offline controllers manufactured by onsemi. It is categorized under PMIC - Power Management ICs, specifically AC DC Converters, Offline Switches. The series is known for combining high performance with cost-effectiveness for consumer and industrial power adapter applications.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with any potential replacements by comparing pin configurations, electrical parameters, and functional descriptions against the original datasheet.