Str F6267 Datasheet Pdf -

is a high-performance, off-line quasi-resonant flyback switching regulator IC manufactured by Sanken Electric

. 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:

Power MOSFET, current-mode PWM controller, and frequency jittering circuit Operating Temperature: Reliable operation up to 105 raised to the composed with power C AliExpress Pinout Configuration (5-Pin TO-3P/SIP)

While some extended datasheets list up to 8 pins for specific series variants, the standard STR-F6267 module typically uses a 5-pin layout: Pin 1 (GND): Ground connection Jotrin Electronics Pin 2 (Vcc): Power supply input for the control IC Jotrin Electronics Pin 3 (FB/OCP): Feedback and Overcurrent Protection Jotrin Electronics Pin 4 (CS): Current Sense Jotrin Electronics Pin 5 (Drain):

Internal MOSFET drain connection, typically connected to the primary transformer winding Jotrin Electronics Built-in Protection Features

The IC includes several critical safety mechanisms to protect the power supply and connected loads: Over-Voltage Protection (OVP): Shuts down the IC if output voltage exceeds safe limits Over-Current Protection (OCP): Limits the peak current through the MOSFET Thermal Shutdown (OTP):

Protects the device from overheating during prolonged high-load operation Soft Start:

Gradually increases the power during startup to reduce component stress Common Applications Consumer Electronics:

Power supplies for LED/LCD TVs (e.g., Sony models) and AC/DC adapters Industrial Equipment: Reliable power conversion for industrial-grade systems Battery Chargers: Efficient charging circuits requiring compact designs Datasheet and Sourcing You can find the full PDF documentation on platforms like ALLDATASHEET.COM or through distributors like Veswin Electronics or a list of equivalent replacement ICs for your specific repair? STR-F6267 Datasheet, PDF - ALLDATASHEET.COM

This is an informative report on the STR-F6267, based on its typical datasheet specifications. Since I cannot directly upload a PDF file, this report compiles the critical technical data, pinout, electrical characteristics, and application notes you would find in the official Sanken Electric Co., Ltd. datasheet.

7. Protection Modes Explained

8. How to Read the STR F6267 Datasheet PDF Like a Pro

When you open the STR F6267 datasheet PDF, pay special attention to these sections: str f6267 datasheet pdf

Page 2 – Package and pinout – Confirm your layout footprint.
Page 4-5 – Electrical characteristics – Check tolerances for frequency and current sense voltage.
Page 7 – Typical performance characteristics – Graphs show frequency vs. temperature, Rds(on) vs. temperature.
Page 9 – Application circuit – Compare with your design.
Page 10 – PCB layout guidelines – Crucial for reducing EMI and avoiding false overcurrent triggers.

Ordering Information

| Part Number | Package | Temperature Range | Status | | :--- | :--- | :--- | :--- | | STF6267 | PowerSSO-12 | -40°C to +150°C (Tj) | Active |

Disclaimer: This feature summary is generated based on typical specifications for the STF6267 series. Always consult the official Manufacturer Datasheet (PDF) provided by STMicroelectronics for precise design parameters, pin configurations, and thermal data.

The STR-F6267 is an integrated circuit (IC) developed by Sanken Electric, designed primarily as an off-line switching regulator for Switched-Mode Power Supplies (SMPS). It combines a high-voltage power MOSFET and a control circuit into a single compact package, typically a 5-pin SIP (Single In-line Package) or TO-3P. Key Specifications & Features

This IC is engineered for high-efficiency power conversion, often reaching up to 95% efficiency.

Integrated Design: Houses both the switching element (MOSFET) and the PWM controller, which reduces total component count and simplifies PCB layout.

Frequency Jittering: Built-in circuitry to minimize Electromagnetic Interference (EMI) noise, a common challenge in switching power supplies.

Comprehensive Protection: Includes built-in safety features like Thermal Shutdown (TSD), Over-Current Protection (OCP), and Over-Voltage Protection (OVP).

Soft Start: Ensures a gradual power-up sequence to prevent sudden current surges during startup. Pinout Configuration (5-Pin Package) Description GND Ground reference Vcc Power supply for the IC's internal logic FB Feedback pin for voltage regulation CS Current Sense input for over-current protection DRAIN Connected to the internal power MOSFET's drain

Note: Some references mention additional pins (up to 8) for specific variants or synchronization inputs, so always check your physical chip's configuration. Common Applications

The STR-F6267 is a popular choice for designers needing a compact and reliable power solution for:

Consumer Electronics: AC-DC adapters for monitors, TVs, and audio equipment. Page 2 – Package and pinout – Confirm

Industrial Equipment: Power supplies for mechatronics and industrial control systems.

LED Drivers: Providing regulated power for lighting systems.

Battery Chargers: Efficiently converting AC mains to DC for charging mobile or portable devices. Datasheet Resources

You can find the detailed technical documentation on several electronics portals:

AllDatasheet provides standard PDF downloads for Sanken power ICs.

Ariat-Tech offers a direct datasheet PDF for the Sanken variant.

Utsource and Jotrin Electronics provide summarized parameters and functional descriptions. Are you planning to use this IC in a new design, or STR-F6267 - SANKEN - Jotrin Electronics

is a high-performance off-line switching regulator IC manufactured by Sanken Electric Co. It is specifically designed for use in quasi-resonant flyback switching power supplies (SMPS). Key Technical Specifications

The STR-F6267 integrates a power MOSFET and a controller chip in a single package (typically a 5-pin SIP) to reduce component count and simplify design. Off-line Quasi-Resonant Switching Regulator. Package Type: 5-pin SIP (Single In-line Package). Integrated Components:

High-voltage Power MOSFET and a current-mode PWM controller. Efficiency:

Can achieve up to 95% efficiency in optimal circuit designs. www.jotrin.ru Core Features Protection Circuits: Over-Current Protection (OCP)

Includes built-in overcurrent protection (OCP), overvoltage protection (OVP), and thermal shutdown (TSD). Soft Start:

Integrated soft-start function to reduce stress on components during power-up. Low Noise:

Designed for low EMI (Electromagnetic Interference) through its quasi-resonant switching operation. Frequency Jittering: Helps in further reducing EMI noise. Common Applications

This IC is widely used in power-sensitive electronics, including: AC/DC adapters and battery chargers. Power supplies for televisions and monitors. LED drivers and small motor drivers. Datasheet Resources

You can access full technical PDF documents through major component databases: Alldatasheet - STR-F6267 PDF

: Provides comprehensive technical specs and pinout diagrams. Utsource Product Detail : Summarizes key attributes and usage scenarios. Veswin Electronics

: Lists manufacturer details and availability for repair centers. or a specific circuit schematic for this IC? STR-F6267 - SANKEN - Jotrin Electronics

10. Common Issues & Troubleshooting Using the Datasheet

Engineers frequently report the following problems when using the STR-F6267:

| 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 |

Problem 2: Intermittent Burst Mode at Medium Load

The FB pin voltage may be too low due to optocoupler leakage. Compare the FB voltage with the "Burst mode threshold" (typically 1.4V) in the electrical table.

6. Typical Application Circuit (Flyback Topology)

A standard STR-F6267 power supply includes:

AC Input & Rectification: Bridge rectifier and bulk capacitor (150-450V DC).
Transformer (T1): Primary winding between DC bus and Pin 4 (Drain). Auxiliary winding provides feedback voltage to Pin 3 (VCC) via a diode/cap.
Start-up: Internal current source inside Pin 4 charges external capacitor on Pin 3 (VCC) until 16V is reached.
Current Sensing: Resistor from Pin 2 (S/OCP) to GND. ( R_sense = V_th(OCP) / I_peak ).
Feedback Loop: Optocoupler (e.g., PC817) and secondary-side TL431 regulator. Optocoupler transistor pulls current from Pin 1 (FB) to GND to regulate output voltage.
Snubber: RCD snubber across the transformer primary to limit drain voltage spikes.