ISO5125I-45 is a highly integrated flyback controller from Power Integrations designed for use in isolated power supplies. This controller features a range of functions to simplify power supply design, including primary-side regulation, feedback sense and control, and protection features.
The ISO5125I-45 offers an input voltage range of 85-265 VAC, making it suitable for a wide range of applications. It also features up to 45 W output power, making it ideal for medium-power applications. The controller includes a built-in 650 V power MOSFET to drive the primary side of the transformer, eliminating the need for an external high-voltage transistor.
Other key features of the ISO5125I-45 include soft-start capability to reduce inrush current, frequency jittering for improved EMI performance, and overvoltage and overcurrent protection to ensure system reliability. The controller also offers various operational modes such as frequency foldback and skip cycle during light load conditions to improve efficiency.
Overall, the ISO5125I-45 is a versatile and reliable flyback controller that offers a range of features to simplify power supply design and enhance system performance
