Str F6267 Datasheet Pdf Site

Technical Brief: The STR-F6267 Switching Power Supply IC

Overview

The STR-F6267 is a specialized hybrid Integrated Circuit (IC) designed by Sanken Electric (now part of Onsemi) for use in Switched-Mode Power Supplies (SMPS). It belongs to the STR-F6200 series, which is widely respected in the consumer electronics industry for high reliability and simplified circuit design.

The STR-F6267 pinout is critical for correct integration. While specific pin roles can vary by application, they generally include: Drain: Connection to the transformer primary. Source: Ground or current sensing point. VCC: Power supply input for the control IC. Feedback (FB): Used for output voltage regulation. str f6267 datasheet pdf

• Maximum drain‑to‑source voltage (VDSS): typically several hundred volts (common primary‑side ICs: 600–800 V).
• Switching frequency: quasi‑resonant or fixed frequency range (tens to low hundreds of kHz), often set/modified by external CT and circuit conditions.
• Peak current limit and OCP behavior: integrated current sense with thresholds for cycle‑by‑cycle limiting and latched/unlatched protections.
• Protections: overcurrent, overvoltage (secondary and VCC), thermal shutdown, soft‑start, hiccup or latch mode options depending on variant.
• Standby / no‑load consumption: minimized via burst, frequency reduction, or low‑power modes in family designs.
• Package thermal handling: TO‑3P power package requires good PCB thermal path and heatsinking in designs delivering several watts.

Understanding the STR F6267