NCP1053ST136T3G

AC DC Converters, Offline Switchers Overview

The NCP1053ST136T3G is an integrated offline switcher from onsemi, designed for flyback converter topologies. It operates with a fixed switching frequency of 136 kHz and features an internal high-voltage power MOSFET rated at 700 V breakdown voltage. The device supports a maximum output power of 40 W and includes comprehensive protection mechanisms such as current limiting, open-loop detection, overload protection, and thermal shutdown. It is housed in a surface-mount SOT-223 (TO-261) package, facilitating compact power supply designs.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V high-voltage power MOSFET to minimize external component count
• Includes built-in protection against overcurrent, open-loop faults, and excessive temperature
• Operates at a fixed 136 kHz switching frequency for consistent electromagnetic interference profiles

AC DC Converters, Offline Switchers Applications

• Offline AC/DC converters for low-power adapters
• Flyback power supplies for consumer electronics
• Standby power supplies for televisions and monitors

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'ST136' confirms the 136 kHz frequency variant. Confirm the SOT-223 package type matches your PCB footprint requirements. Check for RoHS compliance status if required by your manufacturing standards. Ensure the part number corresponds to the active or obsolete status indicated by the manufacturer's latest documentation.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a simple, cost-effective flyback solution with moderate power needs up to 40 W. The fixed frequency operation simplifies transformer design compared to variable frequency alternatives. Consider the thermal performance of the SOT-223 package relative to your expected ambient temperatures and load conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1050-NCP1055 series of monolithic switchers. These devices are engineered for high reliability in offline power conversion. The NCP1053 specifically targets the 136 kHz frequency band, distinguishing it from other variants in the family that may operate at different frequencies like 100 kHz or 44 kHz.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1053P44G: Alternative pin-compatible version operating at 44 kHz. NCP1053ST136T3GOS: Same electrical specifications but potentially different reel packaging configuration.