The OB3663CP is a highly integrated PWM power switch, ideal for cost-effective offline flyback converter applications. Designed by On-Bright, this IC integrates a high-voltage power MOSFET and control circuitry to minimize external components and simplify power supply design. It targets high energy efficiency and reliable performance in various power applications.

Applications

• Power adapters for mobile devices
• Standby power supplies for home appliances
• LED lighting power supplies
• Auxiliary power supplies for various electronic systems

Features

• Integrated high-voltage power MOSFET
• Valley switching operation
• Frequency jittering for reduced EMI
• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Over-temperature protection (OTP)
• Short-circuit protection (SCP)
• Built-in soft-start function

Benefits

• High Efficiency: Valley switching operation minimizes switching losses.
• Reduced BOM Cost: Integration of power MOSFET and control circuits reduces the number of external components.
• Enhanced Reliability: Comprehensive protection features ensure stable and reliable operation.
• Simplified Design: Integrated design simplifies the design process.
• Improved EMI: Frequency jittering helps reduce electromagnetic interference.

Additional Details

The OB3663CP employs valley switching, which minimizes switching losses and enhances efficiency, especially under light load conditions. The integrated frequency jittering function reduces EMI emissions, reducing the need for external filtering components. Comprehensive protection mechanisms, including OVP, OCP, OTP, and SCP, ensure safe and reliable operation under various fault conditions. The built-in soft-start function limits the inrush current during startup, preventing potential damage to power components. The compact package makes it suitable for applications where space is limited.