Str F6267 Datasheet Pdf
Based on repair datasheets and real-world service manuals:
| Symptom | Likely Cause | Test Point | | :--- | :--- | :--- | | No output, VCC cycling 0V→15V→0V | Short on secondary or overload on FB pin | Check diodes, caps on output | | No output, VCC stuck <15V | Start-up resistor open or VCC cap dried out | Replace 100µF/50V cap | | Blows fuse, D-S shorted | Primary snubber failed or AC line surge | Check RCD snubber diode (FR107) | | Output present but ticking noise | Overload or faulty optocoupler | Isolate FB pin, check load | | Output high (overvoltage) | Feedback loop open (optocoupler or TL431 dead) | Immediate danger – will trigger OVP latch |
When you download the STR F6267 datasheet PDF, focus on the following sections:
| Pin | Name | Function | | :--- | :--- | :--- | | 1 | FB/OCP | Feedback input from optocoupler (current sense + control) | | 2 | S/OCP | Source of MOSFET / Current sense input | | 3 | D/ST | Drain of MOSFET (connected to transformer primary) | | 4 | VCC | Supply voltage (start-up and running). Typical: 18V. | | 5 | GND | Ground (reference for control circuit) | | 6 | NC | No connection (or used for heatsink in some variants) | str f6267 datasheet pdf
Q: Can I replace STR F6267 with STR F6263? A: No, unless you recalculate the primary current limit. The F6263 has a lower drain current rating (3.5A) and higher RDS(on). Always consult both datasheets.
Q: Is the STR F6267 datasheet PDF available in Chinese/Japanese? A: Yes, Sanken provides datasheets in Japanese and often in English. Some aggregated sites offer translation notes.
Q: What is the difference between STR-F6267 and STR-F6267H? A: The "H" variant typically has a lower RDS(on) and higher efficiency. Do not interchange without comparing the full datasheet. Based on repair datasheets and real-world service manuals:
Q: Can I use the STR F6267 for a 150W power supply? A: Not recommended. The maximum continuous drain current is 5.5A. For 150W (e.g., 19V/7.9A), the primary peak current would exceed safe margins. Consider STR-F6600 series.
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| Parameter | Conditions | Min | Typ | Max | Unit | |--------------------------|-----------------------------|-----|-----|-----|------| | Startup current | VCC = 14V | - | 20 | 50 | µA | | Operating current | FB = 0V, after startup | - | 4.5 | 7 | mA | | Oscillation frequency | | 60 | 67 | 74 | kHz | | Maximum duty cycle | | 72 | 77 | 82 | % | | Overcurrent threshold | S/OCP pin voltage | 0.65| 0.72| 0.79| V | | OVP trigger voltage (VCC)| | 27.5| 28.5| 29.5| V | | Thermal shutdown temp. | | - | 140 | - | °C |
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.
This component is primarily found in LED televisions, CRT monitors, and industrial power supply units. It functions as a high-voltage power switch and controller, integrating a power MOSFET and a control IC into a single package.
| Parameter | Test Condition | Min | Typ | Max | Unit | |-----------|---------------|-----|-----|-----|------| | Drain-Source Breakdown Voltage | VGS=0V, ID=1mA | 650 | 700 | - | V | | Static Drain-Source ON Resistance | RDS(on) | - | 1.3 | 1.8 | Ω | | Output Capacitance | VDS=100V, f=1MHz | - | 150 | - | pF |
