UCC28231 Overview
The UCC28230, UCC28231 PWM bus controllers are optimized for use in high efficiency, high power density, unregulated intermediate bus converters. Topologies include push-pull, half-bridge and full-bridge. External drivers, such as the UCC27200 120-V high-side/low-side drivers, can be used with this controller.
UCC28231 Key Features
- Programmable, Load Depended Off Time Control
- Frequency Controlled Start Up Allows Small Output Inductor, Low Ripple and Constant Current Start with Large Output Capa
- Two 0.2-A Push-Pull Outputs Provide Matched Control Signals D to External Drivers
- Two Additional 1- D Outputs for Optimal Use of Self-Driven or Control Driven Synchronous Rectifiers
- Unregulated, Fixed Volt-Second or Fixed Frequency Modes set by User
- Two, 1.5% Overall Accuracy Reference Voltage Options: 5-V for UCC28230 and 3.3-V for UCC28231
- Resistor Programmable Switching Frequency up to 1 MHz
- Cycle-by-Cycle Current Limit Allows Parallel Operation with Droop Based Current Sharing
- Single External Capacitor sets Soft-Start and Over Current Hiccup Mode Parameters with Restart
- Severe Short Circuit Hiccup with Restart or Latch Off Protection Option by External Resistor