UC3825DWTR – TEXAS INSTRUMENTS

The UC3825DWTR is a high-performance, current-mode PWM controller from Texas Instruments, packaged in a space-saving 8-pin SOIC (small outline integrated circuit) package. It operates from a wide input voltage range of 8V to 40V, making it suitable for a variety of applications. The device features a fixed 500kHz switching frequency, eliminating the need for external frequency-setting components and simplifying design. Its current-mode architecture provides fast transient response and excellent line regulation, crucial for applications requiring tight load regulation. The UC3825DWTR incorporates features like programmable soft-start, leading/trailing edge blanking, and an undervoltage lockout for enhanced reliability and protection. Common use cases include off-line converters, DC-DC converters, and switching power supplies in applications demanding high efficiency and compact size. Its internal compensation circuitry simplifies design, reducing the external component count and minimizing design complexity compared to voltage-mode controllers. The device’s ability to operate at high switching frequencies allows for the use of smaller, less expensive inductors and capacitors, contributing to a smaller overall solution size. The thermal shutdown feature further protects the device from over-temperature conditions.