The LT3517FE is a highly versatile, high voltage isolated flyback converter IC designed by Linear Technology, a leader in the design and manufacture of high-performance analog integrated circuits. This advanced converter IC is specifically engineered to address the needs of applications requiring efficient power conversion with galvanic isolation.

Key Features:

• Wide Input Voltage Range: The LT3517FE operates over a wide input voltage range of 3V to 40V, making it suitable for a variety of power sources, from single-cell Li-ion batteries to automotive inputs.
• No Transformer Third Winding or Opto-Isolator Required for Regulation: The device's innovative design eliminates the need for a third winding or an opto-isolator for output voltage regulation, simplifying the design and reducing the overall component count.
• Integrated 1.25A NPN Power Switch: With an integrated 1.25A NPN power switch, the LT3517FE can deliver significant power output while maintaining a compact footprint.
• Programmable Soft-Start Function: The programmable soft-start function allows for controlled ramp-up of output voltage, which helps to prevent inrush current at startup and provides a smoother power-up sequence.
• Boundary Mode Operation: The device operates in boundary mode, which is a variable frequency current mode control switching scheme, resulting in a quasi-resonant zero voltage switching that minimizes switching losses and improves efficiency.

Applications:

The LT3517FE is ideal for various applications that require isolated power delivery. It is commonly used in:

• Industrial Control Systems
• Telecommunications Infrastructure
• Medical Equipment
• Isolated Automotive Power Supplies
• Power Over Ethernet (PoE) Applications

Quality and Reliability:

Linear Technology's commitment to quality ensures that the LT3517FE meets the highest standards of reliability and performance. The device is available in a thermally enhanced 16-lead TSSOP package with exposed pad for improved thermal dissipation, ensuring stable operation across a wide range of environmental conditions.