Description

The KA5H0280RYDTU model is a member of the Fairchild Power Switch (FPS) product family, specifically designed for offline switch-mode power supply (SMPS) applications with minimal external components. The model features a high voltage power SenseFET and a current mode PWM IC. The PWM controller has an integrated fixed oscillator, under voltage lockout, leading edge blanking, optimized gate turn-on/turn-off driver, thermal shutdown protection, over voltage protection, and temperature-compensated precision current sources for loop compensation and fault protection circuitry. These features allow the KA5H0280RYDTU model to have a basic platform that works well for cost-effective designs, either in a flyback converter or a forward converter. Additionally, the use of this model can reduce total component count, design size, weight, and, at the same time, increase efficiency, productivity, and the system's reliability.

Specifications and features

• Precision Fixed Operating Frequency (100/67/50 kHz)
• Low Start-up Current (Typ. 100uA)
• Pulse-by-Pulse Current Limiting
• Over Load Protection
• Over Voltage Protection (Min. 25V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode

Application Scenarios

The KA5H0280RYDTU model is most suitable for offline switch-mode power supply (SMPS) applications with minimal external components. It can work well in cost-effective designs, either in a flyback converter or a forward converter.

Comparison

• Minimal external components required
• Integrated fixed oscillator
• Optimized gate turn-on/turn-off driver
• Included current mode PWM IC
• Under voltage lockout
• Over voltage protection
• Thermal shutdown protection
• Temperature-compensated precision current sources for loop compensation and fault protection circuitry
• Works well in cost-effective design, either in a flyback converter or a forward converter

No significant disadvantages were found for the KA5H0280RYDTU model.