The FSL138MRT is a highly integrated offline power switch incorporating a Pulse Width Modulation (PWM) controller and a SenseFET, specifically designed for low-power applications. It is optimized for energy efficiency and cost-effectiveness in flyback converter topologies. This device integrates numerous protection features to enhance system reliability.

Applications

• Power adapters for mobile devices and peripherals
• Standby power supplies for consumer electronics
• Auxiliary power supplies in appliances
• LED lighting power supplies
• Chargers for portable devices

Features

• Integrated PWM controller and SenseFET
• Low startup current
• Built-in soft-start function
• Frequency hopping for improved EMI performance
• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Over-temperature protection (OTP)
• Under-voltage lockout (UVLO)
• Automatic burst-mode operation for enhanced efficiency at light load

Benefits

• Reduced component count for smaller and more cost-effective designs
• Improved energy efficiency across a wide load range
• Enhanced system reliability due to integrated protection features
• Simplified design process with built-in soft-start and frequency hopping
• Minimized EMI emissions for compliance with regulatory standards

Additional Details

The FSL138MRT is designed to operate with a wide input voltage range, making it suitable for global applications. The integrated protection features ensure safe and reliable operation under various fault conditions. The frequency hopping feature reduces EMI emissions, simplifying compliance with regulatory standards. The soft-start function minimizes stress on the power components during startup, enhancing system reliability. The automatic burst-mode operation maximizes efficiency at light load conditions, reducing standby power consumption. The internal current sensing allows for accurate over-current protection, preventing damage to the power components. The FSL138MRT is a robust and reliable solution for low-power offline power supplies. The built-in protection functions helps to ensure long-term reliability.