| Pin | Name | Function | |-----|--------|------------------------------------------| | 1 | FB/OLP | Feedback input & overload protection | | 2 | S/OCP | Source pin for current sense & OCP | | 3 | VCC | Supply voltage (startup & operation) | | 4 | GND | Ground | | 5 | DRAIN | Internal MOSFET drain & HV startup |
Note: Some variants have additional NC pins. Verify with the updated datasheet.
If you are troubleshooting a switched-mode power supply (SMPS) in a CRT television, a DVD player, or an industrial power adapter, you have likely run into the STR-F6267. This iconic power IC from Sanken (now part of Allegro MicroSystems) is a workhorse of the offline flyback converter world.
But finding the correct and updated datasheet PDF can be a maze of dead links and blurred scans. Here is your comprehensive guide to the STR-F6267, including what has changed in the latest revision and where to find the official document. str f6267 datasheet pdf updated
The STR F6267 datasheet PDF updated is an essential resource for anyone maintaining or designing a robust quasi-resonant power supply. The key updates in recent revisions include clearer burst-mode specifications, refined OCP threshold values, and improved thermal modeling.
To get the most out of this IC:
Ready to download? Search your favorite component distributor for "STR F6267" and click the "Technical Documents" tab to secure the official, updated PDF. Ready to download
Disclaimer: This article is for informational and educational purposes. Always refer to the official manufacturer datasheet for final design validation.
A basic flyback converter using STR‑F6267 includes:
Insert block diagram from the datasheet here. Standby Power: <
Before you wire this into your PCB, confirm these five pins against the updated datasheet:
Updated Note: Many "STR-F6267" failures are actually due to a faulty startup resistor (Rstart) or a dried-out VCC capacitor on Pin 3. The latest datasheet adds a note to use Low ESR capacitors here.
Inside the STR F6267, four major functional blocks are integrated:
When the FB pin voltage drops below 0.4V (due to low load), the IC enters burst oscillation, skipping several switching cycles to reduce power.
Before diving into the pinout, let’s summarize why the STR-F6267 remains in high demand, especially for LCD TV power supplies, audio amplifiers, and industrial auxiliary power units.
