Shuts down the internal MOSFET on a cycle-by-cycle basis if the voltage across the S/OCP pin exceeds pre-defined limits due to secondary shorts.
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If the documentation is needed for active development or in-depth research, the most authoritative source of information remains the PDF datasheet provided directly by Sanken or its authorized distributors.
Monitor Pin 4 (VCC) for stable voltage. If the voltage continuously cycles up and down, it indicates the IC is entering Under-Voltage Lockout (UVLO), potentially caused by a shorted diode on the auxiliary winding or a failing electrolytic filter capacitor.
: The pinout described above is a general representation based on typical Sanken STR-series quasi-resonant converters. The specific ordering of these pins may vary depending on the exact package variant (e.g., ZSIP-5 vs. TO-3PF/5). It is essential to refer to the official datasheet for the precise pin assignment, orientation, and detailed descriptions of each pin's function for your specific application.
| Parameter | Prior known value | New value (from updated sheet) | |--------------------------|------------------|--------------------------------| | RDS(on) of internal FET | ~2.2 Ω | _______________ | | OCP trip voltage | 0.8 V typ | _______________ | | Burst mode standby power | <100 mW | _______________ | | Frequency modulation for EMI | none | maybe added (frequency jitter) |
: Capable of achieving efficiency levels up to 95% , making it suitable for energy-sensitive applications. Common Applications
Mitigates severe inrush current stresses across the primary rectifier and filter capacitor during power-on states. 🔒 Integrated Protection Mechanisms
The official datasheet can be obtained from Sanken's website or from major electronic component distributor websites like Mouser, DigiKey, or Win-Source. Product pages on these sites often have a "Datasheet" link that provides the latest PDF. The most reliable sources are the official manufacturer and authorized distributors.
The STR-F6267 includes multi-tiered, autonomous safety architectures to prevent catastrophic power supply failures:
: Connected to the internal power MOSFET's drain. Common Applications The STR-F6267 is widely used in: Consumer Electronics : AC/DC adapters and battery chargers.