STR-W6735N

AC DC Converters, Offline Switchers Overview

The STR-W6735N 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 bottom-skip quasi-resonant operation. The device utilizes multi-mode control to switch between three operational steps based on load conditions: UVLO 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 with three operational steps for optimal efficiency
• Bottom-skip quasi-resonant operation to reduce switching frequency
• Integrated power MOSFET and controller IC
• Standby mode support via UVLO or auto burst-oscillation

AC DC Converters, Offline Switchers Applications

• Quasi-resonant switching power supply systems
• High-efficiency AC/DC converters
• Low-noise power supply designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific product number as functions may differ within the series. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the package variant matches system requirements, noting that TO-220F versions exist within the broader family.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring high efficiency and low EMI noise across varying load conditions. Consider the integrated MOSFET capabilities and protection features when designing primary side regulation circuits. Validate thermal performance and package suitability for the target enclosure.

AC DC Converters, Offline Switchers Part Context

The STR-W6735N belongs to the STR-X6700 series of power ICs designed for quasi-resonant topologies. This series integrates a power MOSFET and controller to deliver high efficiency and low noise. Related variants include the STR-W6700 series in different packages and the STR-W6765 for higher power ranges.

AC DC Converters, Offline Switchers Replacement Considerations

STR-W6765 (Sanken Electric)

AC DC Converters, Offline Switchers FAQ

How does the STR-W6735N handle light load conditions?

It supports standby modes including UVLO intermittent oscillation by low output voltage or auto burst-oscillation.

What operation mode is used under low to middle load conditions?

The device employs Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR) to maintain efficiency.