The FS6X-Series is specially designed for off-line DC-DC converters with minimal external components. This device combines a current mode PWM controller with a high voltage power SenseFET in a single package. The PWM controller includes integrated fixed frequency oscillator, line under voltage lockout, sleep on/off function, thermal shutdown protection, over voltage protection, pulse-by-pulse current limit, and temperature compensated precise current sources for a loop compensation. Compared with the discrete MOSFET and PWM controller solution, the FS6X-Series can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability.

• Current Mode PWM Control with a Fixed Operating Frequency (300kHz)
• Pulse by Pulse Current Limit
• Over Load protection
• Over Voltage Protection
• Thermal Shutdown
• Line Under Voltage Detection and Sleep on/off Function
• Internal High Voltage SenseFET (200V)
• Supports Forward or Flyback Topology

• DC-DC Converter
• PoE Device

Related Application Notes

• AN4137 - Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS)
• AN4140 - Transformer Design Consideration for the Off-line Flyback Converters using Fairchild Power Switch
• AN4141 - Troubleshooting and Design Tips for Fairchild Power Switch Flyback Applications
• AN4148 - Audible Noise Reduction Techniques for FPS Applications