Applications

• AC Adapters: Used in adapters for laptops, mobile phones, and other electronic devices.
• Auxiliary Power Supplies: Provides auxiliary power in appliances and industrial equipment.
• Standby Power Supplies: Suitable for standby power supplies in TVs, set-top boxes, and other consumer electronics.
• LED Lighting Power Supplies: Used in LED drivers for lighting applications.
• Small Power Supplies: General-purpose power supplies for various electronic devices.

Features

• Quasi-Resonant Operation: Reduces switching losses and improves efficiency.
• Integrated Power MOSFET: Eliminates the need for an external power MOSFET.
• Built-in Startup Circuit: Simplifies startup and reduces external component count.
• Overcurrent Protection (OCP): Protects the device and the power supply from overcurrent conditions.
• Overvoltage Protection (OVP): Protects the device and the power supply from overvoltage conditions.
• Thermal Shutdown Protection (TSD): Protects the device from overheating.
• Brown-In/Brown-Out Protection: Protects the device from undervoltage conditions.
• Automatic Burst Operation: Reduces power consumption during light load conditions.

Benefits

• High Efficiency: Quasi-resonant operation and integrated MOSFET result in high efficiency.
• Compact Design: Integrated features minimize external component count and board space.
• Reliable Protection: Built-in protection features enhance reliability and prevent damage.
• Simplified Design: Reduces design complexity and time-to-market.
• Low Standby Power Consumption: Automatic burst operation minimizes standby power consumption.

Additional Details

The STR-A6159-7L operates with a fixed on-time and adapts the switching frequency to achieve quasi-resonant operation. The integrated power MOSFET has a specific voltage and current rating, as detailed in the datasheet. The device requires external components, such as a transformer, input capacitor, and output capacitor, for proper operation. Detailed specifications, including input voltage range, output voltage range, switching frequency, and protection thresholds, are available in the Sanken datasheet for the STR-A6159-7L. It is designed to meet various safety standards. The gate drive is integrated, meaning no external gate resistor is usually needed. The device also features a soft-start function, useful for reducing stress on components at start-up.