Pdf - Str F6267 Datasheet

A: Yes, by adjusting the feedback divider ratio (TL431 resistors) and the transformer turns ratio.

| 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). | str f6267 datasheet pdf

| 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: A: Yes, by adjusting the feedback divider ratio