The OB3622PCPA is a highly integrated and cost-effective PWM power switch optimized for offline flyback converter applications. Manufactured by On-Bright, this IC incorporates a high-voltage power MOSFET and a sophisticated control circuit within a single package, reducing the external component count and simplifying the power supply design. It is designed to meet stringent energy efficiency standards and provide reliable performance in various power supply applications.

Applications

• Power adapters for mobile phones and other portable devices
• Standby power supplies for consumer electronics
• LED lighting power supplies
• Auxiliary power supplies in larger electronic systems

Features

• Integrated high-voltage power MOSFET
• Valley switching operation for reduced switching losses
• Frequency jittering for improved EMI performance
• Comprehensive protection features, including over-voltage protection (OVP), over-current protection (OCP), and over-temperature protection (OTP)
• Under-voltage lockout (UVLO)
• Built-in soft-start function
• Low start-up current

Benefits

• High Efficiency: Valley switching and optimized design minimize power losses, leading to high energy efficiency.
• Reduced BOM Cost: Integration of the power MOSFET and control circuitry reduces the number of external components required.
• Enhanced Reliability: Comprehensive protection features ensure robust and reliable operation under various fault conditions.
• Simplified Design: Integrated features and a compact package simplify the power supply design process.
• Improved EMI Performance: Frequency jittering reduces EMI emissions, simplifying compliance with regulatory standards.

Additional Details

The OB3622PCPA operates in valley switching mode to minimize switching losses and improve efficiency, particularly at light loads. The internal oscillator frequency is modulated with frequency jittering to improve EMI performance and reduce the need for external filtering components. The device incorporates multiple protection features, including over-voltage, over-current, and over-temperature protection, to ensure safe and reliable operation. The built-in soft-start function limits inrush current during start-up. It is available in a compact package suitable for space-constrained applications.