LTC3803HS6-3#TRPBF - Constant Frequency Current Mode Flyback DC/DC Controller

The LTC3803HS6-3#TRPBF is a high-performance, constant frequency, current mode flyback DC/DC controller from Linear Technology, designed to simplify the implementation of a compact and efficient power supply. This component is specifically tailored for isolated and non-isolated power conversion applications, providing a robust and versatile solution for a wide range of industrial, telecommunications, and consumer electronics systems.

Key Features:

• Constant Frequency Operation: The LTC3803HS6-3#TRPBF operates at a fixed frequency of 200kHz, which facilitates noise-sensitive applications by allowing for predictable frequency behavior and easy filtering.
• Wide Input Voltage Range: This controller can handle a broad input voltage range, making it suitable for various supply voltages and ensuring consistent performance across different power environments.
• Low Startup and Operating Current: The device features a low startup current of just 10µA and an operating current of 2mA, contributing to the overall efficiency of the power supply design.
• No Transformer Third Winding or Opto-Isolator Required for Regulation: The LTC3803HS6-3#TRPBF can regulate output voltage without the need for a third winding on the transformer or an opto-isolator, simplifying the design and reducing component count.
• Programmable Soft-Start: A soft-start function is integrated to minimize inrush current and ensure a controlled startup sequence, improving system reliability.
• Thermal Protection: Built-in thermal shutdown with hysteresis protects the device from overheating, enhancing the safety and longevity of the application.

Applications:

• Isolated Telecom Power Supplies
• Industrial Power Supplies
• Medical Equipment
• Power over Ethernet (PoE) Systems
• Secondary Side Regulation

The LTC3803HS6-3#TRPBF comes in a compact SOT-23 package, making it an excellent choice for space-constrained applications. Its advanced features and reliable performance make it a preferred option for designers looking to create efficient and durable power supply systems.

Linear Technology provides extensive support for the LTC3803HS6-3#TRPBF, including detailed datasheets, application notes, and reference designs, ensuring that engineers can optimize the use of this controller in their specific applications.