| Parameter | Symbol | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | | | | | | | | Drain-Source Breakdown | ( V_DSS ) | 800 | - | - | V | | Static Drain-Source On-Resistance | ( R_DS(on) ) | - | 1.8 | 2.5 | ( \Omega ) | | Control Section | | | | | | | Oscillator Frequency | ( f_OSC ) | 60 | 66 | 72 | kHz | | Start-up Voltage | ( V_CC(ON) ) | 15.0 | 16.0 | 17.0 | V | | Shutdown (Stop) Voltage | ( V_CC(OFF) ) | 9.0 | 10.0 | 11.0 | V | | Operating Current (after start) | ( I_CC ) | - | 3.5 | 5.5 | mA | | FB Pin Open Voltage | ( V_FB(open) ) | - | 5.7 | - | V | | Overcurrent Detection Threshold | ( V_S/OCP ) | 0.65 | 0.72 | 0.79 | V |

A standard STR-F6267 power supply includes:

Once the VCC voltage reaches the turn-on threshold (typically around 16V), the internal control logic activates and begins switching the internal MOSFET via Pin 1 (DRAIN) .

. It is primarily used as the primary-side controller in Switched-Mode Power Supplies (SMPS), integrating both a power MOSFET and a control circuit into a single 5-pin SIP or TO-3P package Core Technical Specifications Device Type: SMPS Primary IC / Quasi-Resonant Flyback Regulator Efficiency: Can achieve up to 95% efficiency Integrated Components:

This pin configuration is standard for ICs in the STR-F6200 series, making it relatively straightforward to design with and troubleshoot.

If the power supply attempts to click or cycle rhythmically without staying on, check the VCCcap V sub cap C cap C end-sub

| 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 |

: The internal MOSFET is highly rugged against voltage spikes. 📊 Absolute Maximum Ratings Drain-Source Voltage ( VDSScap V sub cap D cap S cap S end-sub ) : Typically rated around (safe for standard AC inputs). Drain Current ( IDcap I sub cap D

The standard 5-pin configuration for the STR-F series typically includes: Description Drain MOSFET drain terminal 2 Source MOSFET source terminal / Current sense 3 GND Ground terminal 4 VCC Power supply for control circuit 5 FB/OLP Feedback input and Overload Protection

Prevents high inrush current during startup.

A: The "H" variant typically has a lower RDS(on) and higher efficiency. Do not interchange without comparing the full datasheet.

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The STR F6267 is a versatile and efficient power management IC suitable for a variety of applications. While this overview provides a general insight into its features and uses, the STR F6267 datasheet PDF remains the primary resource for detailed technical information. Designers and engineers are encouraged to consult the datasheet for precise specifications and to ensure the successful integration of the STR F6267 into their projects.