UCD3138 is a highly integrated digital controller for isolated power supplies with various features. This document describes the features and characteristics of UCD3138, its application scope, ordering information, and functional block diagram.
The UCD3138 is a high-integration digital controller manufactured by Texas Instruments specifically designed for isolated power supply applications. It integrates multiple peripherals optimized for AC/DC and isolated DC/DC applications to reduce component count in IT and network infrastructure solutions.
Key features include up to three independent digital control loops, each utilizing a dedicated error amplifier (EADC) and a PID controller based on 2-pole/2-zero compensation. The device supports various modulation methods such as phase-shifted full-bridge, LLC resonant, and synchronous rectification modes. It incorporates an ARM7TDMI-S microcontroller to execute real-time monitoring and configuration tasks.
The device supports an operating temperature range of -40°C to 125°C.