STR-W6734

AC DC Converters, Offline Switchers Overview

The STR-W6734 is a power IC for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC. It achieves high efficiency and low noise across the full load range via quasi-resonant operation and bottom-skip quasi-resonant operation. The device utilizes multi-mode control with three steps according to load conditions: intermittent oscillation in standby, bottom-skip QR under low to middle loads, and standard QR under middle to heavy loads.

AC DC Converters, Offline Switchers Feature Summary

• Multi-Mode Control for optimal efficiency and low noise across full load ranges
• Integrated Power MOSFET and Controller IC in TO-220F package
• Standby mode support via UVLO intermittent oscillation or auto burst-oscillation

AC DC Converters, Offline Switchers Applications

• Quasi-resonant type switching power supplies
• High efficiency power supply systems
• Low noise power supply applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix of the part number against official Sanken Electric documentation to confirm exact functional variations, as features may differ between products within the series. Ensure the component matches the required TO-220F package configuration and intended operating temperature range for your specific design implementation.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing quasi-resonant converters requiring integrated MOSFET and control logic. Consider the multi-mode control capabilities for optimizing efficiency at light loads versus heavy loads. Verify compatibility with the target application's voltage and current requirements against the datasheet specifications.

AC DC Converters, Offline Switchers Part Context

The STR-W6734 belongs to the STR-X6700 series of power ICs manufactured by Sanken Electric. This series is designed for high-efficiency switching power supplies. The 'W' designation typically indicates the TO-220F package variant, distinguishing it from other package options available within the same functional family.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official Sanken Electric substitution lists for confirmed equivalent part numbers. Do not assume cross-compatibility with other manufacturers' quasi-resonant controllers without verifying pinout, electrical characteristics, and thermal performance.