The STR2A60-BU is a quasi-resonant flyback converter IC manufactured by Sanken Electric. It is designed for use in offline power supplies and offers high efficiency and low noise operation. This IC integrates a power MOSFET and a control circuit in a single package, simplifying the design and reducing the component count of power supply circuits.

Applications

• Power supplies for consumer electronics such as TVs, Blu-ray players, and set-top boxes
• Adapters for laptops, smartphones, and tablets
• Auxiliary power supplies in industrial equipment
• LED lighting power supplies

Features

• Quasi-resonant operation for high efficiency and low EMI
• Integrated power MOSFET for simplified design
• Built-in startup circuit for quick and reliable startup
• Overcurrent protection (OCP) with auto-restart
• Overvoltage protection (OVP) with latch
• Thermal shutdown protection (TSD) with auto-restart
• Brown-in and brown-out protection
• Frequency reduction function under light load condition to improve efficiency

Benefits

• High Efficiency: Quasi-resonant operation minimizes switching losses, resulting in high efficiency and reduced heat dissipation.
• Simplified Design: The integrated power MOSFET and control circuit reduce the component count and simplify the design process.
• Robust Protection: Built-in protection features such as OCP, OVP, and TSD ensure safe and reliable operation.
• Low EMI: Quasi-resonant operation reduces EMI noise, making it suitable for noise-sensitive applications.
• Improved Light Load Efficiency: The frequency reduction function optimizes efficiency under light load conditions.

Additional Details

The STR2A60-BU operates in quasi-resonant mode, which means that the MOSFET is turned on when the voltage across it is at its minimum. This reduces switching losses and EMI noise. The IC also includes a built-in startup circuit, which eliminates the need for external startup components. The STR2A60-BU has various protection features including overcurrent protection (OCP), overvoltage protection (OVP), and thermal shutdown protection (TSD). These features protect the power supply from damage in the event of a fault. The IC also has a brown-in and brown-out protection feature, which prevents the power supply from operating under abnormal input voltage conditions. The frequency reduction function under light load condition improves efficiency. The STR2A60-BU is available in a through-hole package.