描述 Description

The UCC256302 is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed for use in offline AC-DC or isolated DC-DC to provide a complete power system using a minimum of external components. The resulting power system is designed to meet the most stringent requirements for standby power without the need for a separate standby power converter.

UCC256302 includes an integrated, high voltage startup function which eliminates the need for an external bias supply, reducing BOM count and minimizing solution size. UCC256302 uses hybrid hysteretic control to provide best in class line and load transient response. The control makes the open loop transfer function a first order system so that it’s very easy to compensate.

UCC256302 provides a high efficient burst mode with consistent burst power level during each burst on cycle. The burst power level is programmable and adaptively changes with input voltage, making the optimization of efficiency very easy.

Select the appropriate LLC resonant controller for your design with UCC25630x Selection Guide

特性 Features

? Integrated High Voltage Startup
? Eliminates Need for External Bias Supply

? Best-in-Class Transient Response
? Hybrid Hysteretic Control (HHC)
? Best-in-Class Transient Response
? Easy Compensation Design

? Optimized Low Power Features Enable 75 mW Standby Power Design with PFC on
? Advanced Burst Mode Opto-Coupler Low Power Operation
? Helps Enable Compliance to CoC Tier II Standard

? Fast Exit from Burst Mode
? Improved Capacitive Region Avoidance Scheme
? Adaptive Dead-Time
? Internal High-Side Gate Drivers (0.6-A and 1.2-A Capability)
? Robust Soft Start with No Hard Switching
? Over Temperature, Output Over Voltage, Input Over and Under Voltage Protection with Three Levels of Over Current Protections
? Wide Operating Frequency Range (35 kHz to 1 MHz)
? Select the appropriate LLC resonant controller for your design with UCC25630x Selection GuideUCC25630x Selection Guide
? Create a Custom Design Using the UCC256302 With the WEBENCH? Power Designer