Str F6267 Datasheet Pdf _verified_ Today

The STR-F6267 is an off-line switching regulator IC developed by Sanken. It is designed for use in power supply circuits, integrating a power MOSFET and a current-mode PWM controller into a single 5-pin package. 📄 Quick Datasheet Summary Manufacturer: Sanken Package Type: 5-pin SIP (Single In-line Package) or ZIP

High-performance power management
Low power consumption
High efficiency
Overvoltage protection
Undervoltage protection
Overcurrent protection

Key External Components:

EMI Filter & Rectifier: AC input (90–265VAC) → Bridge diode → Bulk capacitor.
Start-up Resistor: Connects from high-voltage DC bus to VCC (Pin 3). Typically 100kΩ–470kΩ.
Transformer: Primary winding to Drain (Pin 1). Auxiliary winding for VCC supply after start-up.
Output Rectification: Schottky diode + LC filter on secondary side.
Feedback Network: TL431 + optocoupler from secondary to FB pin (Pin 4).
Current Sense Resistor: Between Source (Pin 2) and GND (usually 0.22Ω to 0.68Ω).
VCC Capacitor: 22µF to 100µF, 50V, placed close to Pin 3 and Pin 5.

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Frequency Jittering: Built-in circuitry to minimize Electromagnetic Interference (EMI) noise, a common challenge in switching power supplies. The STR-F6267 is an off-line switching regulator IC

💡 Key Takeaway: If you are repairing an older device or designing a simple, cost-effective power supply, the STR-F6267 is a solid choice due to its high efficiency and minimal external component requirements. STR-F6267 | In Stock | Utsource Key External Components:

: Combines a robust power transistor with a current-mode PWM controller. EMI Reduction : Features a built-in frequency jittering circuit

Standby Performance: Features a "burst-oscillation" mode to lower power consumption under light load or standby conditions. 2. Pin Configuration (TO-3PF-5)

Substitution Notes: If you cannot find the F6267 specifically, look for the STR-F6267S or other members of the STR-F6200 series (like STR-F6656), but verify pin-for-pin compatibility as voltage/current ratings differ.