The OB5282CPA is a highly integrated and high-performance current-mode PWM controller optimized for offline flyback converter applications. Manufactured by On-Bright, this device incorporates advanced features to achieve high efficiency, low standby power, and comprehensive protection, making it ideal for a wide range of power supply applications.

Applications

• Power adapters for mobile devices, laptops, and tablets
• LED lighting power supplies
• Standby power supplies for consumer electronics
• Auxiliary power supplies

Features

• Integrated high-voltage startup circuit
• Current-mode PWM control
• Frequency jittering for improved EMI performance
• Built-in soft-start function
• Comprehensive protection features: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Over-Temperature Protection (OTP), Short-Circuit Protection (SCP), and Open-Loop Protection (OLP)
• Low standby power consumption
• Adjustable switching frequency

Benefits

• High Efficiency: Optimized current-mode PWM control and low standby power consumption result in high energy efficiency.
• Reduced BOM Cost: Integrated high-voltage startup circuit reduces the number of external components needed.
• Enhanced Reliability: Comprehensive protection features ensure robust and reliable operation under various fault conditions.
• Simplified Design: Integrated functions and adjustable parameters simplify the design process.
• Improved EMI Performance: Frequency jittering reduces electromagnetic interference.

Additional Details

The OB5282CPA employs current-mode PWM control for stable and efficient operation across a wide range of input voltages and output loads. The integrated high-voltage startup circuit eliminates the need for external startup resistors, which improves efficiency and reduces BOM cost. The frequency jittering function significantly reduces EMI emissions, which simplifies compliance with regulatory standards and reduces the need for external filtering components. The built-in soft-start function limits the inrush current during startup, preventing stress on the power components. The comprehensive protection features include over-voltage, over-current, over-temperature, short-circuit, and open-loop protection, ensuring safe and reliable operation under various fault conditions. The adjustable switching frequency allows for optimization of efficiency and EMI performance.