NCP1071STCT3G

AC DC Converters, Offline Switchers Overview

The NCP1071STCT3G is a high-voltage fixed-frequency current-mode switcher designed for offline AC/DC converters. It integrates a 700V MOSFET and an oscillator, eliminating the need for external bias windings. The device operates from a wide supply voltage range of 9V to 45V. It features cycle-by-cycle current limiting and thermal shutdown protection. The component is housed in a SOT-223-4 package and utilizes silicon technology.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power MOSFET with control circuitry
• Fixed-frequency current-mode operation
• Eliminates requirement for auxiliary bias winding
• Includes thermal shutdown and cycle-by-cycle current limit

AC DC Converters, Offline Switchers Applications

• Offline AC/DC power supplies
• Standby power supplies
• Battery chargers
• General-purpose isolated DC/DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix STCT3G against official onsemi documentation to confirm the exact tape-and-reel packaging configuration. Ensure the part number matches the intended SOT-223-4 footprint and pinout requirements for your PCB layout. Cross-reference the RoHS compliance status with the latest datasheet revision to meet regulatory standards.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a simplified transformer design without auxiliary windings. It is suitable for applications needing robust overcurrent protection and thermal management. Consider the fixed switching frequency when designing EMI filters. Verify that the input voltage range aligns with the 9V to 45V operating specification.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP107x series of high-voltage switches. It is distinct from linear regulators like the NCP1117 or other PMICs such as the NCV92310. The NCP1071 is specifically engineered for cost-effective, low-component-count offline power conversion solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct substitutes within the NCP107x family, such as variants with different pinouts or slightly adjusted electrical characteristics. Confirm compatibility with existing transformer designs before substitution.