Str F6267 Datasheet Pdf May 2026

| Pin No. | Name | Description | |---------|-----------|-----------------------------------------------------------------------------| | 1 | FB/OLP | Feedback / Overload protection input. Connected to optocoupler transistor. | | 2 | S/OCP | Source pin for MOSFET / Current sense input. | | 3 | VCC | Power supply input (15V to 28V typical, start-up threshold ~15.5V). | | 4 | GND | Ground. | | 5 | DRAIN | Internal MOSFET drain. High-voltage pin (up to 650V). |

Always cross-reference the datasheet tables before substituting. Q1: Is there a difference between STR-F6267 and STR-F6267S? A: Yes, the “S” suffix may indicate improved ESD rating or different package material. Refer to the specific datasheet. str f6267 datasheet pdf

A: Yes, by adjusting the feedback divider ratio (TL431 resistors) and the transformer turns ratio. | Pin No

| Symptom | Likely cause per datasheet | Solution | |------------------------------|-----------------------------------------------------|--------------------------------------------| | No startup, VCC oscillates | VCC startup capacitor too small or leakage | Increase to 47µF, check startup resistor | | Supply shuts down under load | Current sense resistor too large (false OCP) | Reduce resistor value (e.g., 0.33Ω→0.27Ω) | | Blown IC | Drain overvoltage spike exceeding 650V | Improve snubber, check transformer leakage | | Intermittent restart | Overload protection triggered by noise on FB pin | Add 100pF capacitor from FB to GND | If you cannot find the STR-F6267, the datasheet may help you select substitutes: | | 2 | S/OCP | Source pin for MOSFET / Current sense input

Note: The tab of the TO-220F package is internally connected to the DRAIN (pin 5) and must be isolated from the heatsink. Before designing a power supply, always verify the absolute maximum ratings. Exceeding these values can destroy the IC.

| Part Number | MOSFET Rating | Frequency | Protection | Direct Replacement? | |-------------|---------------|-----------|--------------------|---------------------------| | STR-F6267 | 650V / 8A | 67 kHz | OLP, OVP, TSD | Reference design | | STR-F6656 | 650V / 6A | 67 kHz | Similar | Lower current – check load | | STR-F6654 | 560V / 4A | 67 kHz | Similar | No (lower voltage) | | TOP258PN | 700V / ext | 66 kHz | Different pinout | No (requires layout change)|

For further reading, pair the STR-F6267 datasheet with Sanken’s “STR-F6200 Series Design Guide” and a good flyback transformer design reference. Looking for the official STR F6267 datasheet PDF? Visit Sanken’s semiconductor portal or Mouser’s technical resources to download a verified copy today.