The OB2560LMP is a highly integrated power switch designed for offline flyback converter applications. Manufactured by On-Bright, this IC incorporates a current mode PWM controller and a high-voltage power MOSFET, reducing external component count and simplifying the design process while maintaining high performance and efficiency.

Applications

• Adapters for mobile devices
• Chargers for smartphones and tablets
• LED lighting power supplies
• Standby power supplies for consumer electronics

Features

• Integrated high-voltage power MOSFET
• Current mode PWM control
• Low startup current
• Cycle-by-cycle current limiting
• Over-voltage protection (OVP)
• Over-temperature protection (OTP)
• Short-circuit protection (SCP)
• Frequency jittering for improved EMI performance

Benefits

• Reduced BOM (Bill of Materials) cost
• Simplified power supply design
• High efficiency
• Improved system reliability
• Reduced EMI

The OB2560LMP operates in discontinuous conduction mode (DCM), which enhances efficiency and reduces switching losses. The internal slope compensation ensures stable operation across a wide input voltage range. Comprehensive protection features, including over-voltage, over-temperature, and short-circuit protection, significantly improve the reliability and robustness of the power supply. Frequency jittering helps minimize EMI emissions.

Technical Specifications:

• Operating Frequency: typically around 65kHz
• Startup Current: very low to minimize standby power
• Protection Features: OVP, OTP, SCP
• Operating Temperature Range: -40°C to +85°C
• Package: various compact packages available