UCC256302 LLC Resonant Controller With High Voltage Start Up Enabling Low Standby Power | TI.com

UCC256302 (ACTIVE)

LLC Resonant Controller With High Voltage Start Up Enabling Low Standby Power

 

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

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

All trademarks are the property of their respective owners.

View more

Parametrics Compare all products in PWM controllers & resonant controllers

 
Topology
Control method
VCC (Min) (V)
VCC (Max) (V)
Frequency (Max) (kHz)
Duty cycle (Max) (%)
Gate drive (Typ) (A)
Features
Rating
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
UCC256302 UCC25600 UCC256301 UCC256303 UCC256304
Half-Bridge
Resonant LLC    
Half-Bridge
Resonant LLC    
Half-Bridge
Resonant LLC    
Half-Bridge
Resonant LLC    
Half-Bridge
Resonant LLC    
Current     Voltage     Current     Current     Current    
13     11     13     11.25     13    
30     18     30     30     30    
1000     350     1000     1000     1000    
50     50     50     50     50    
0.6     0.8     0.6     0.6     0.6    
HV Start-up
Integrated Gate Drivers
Light Load Efficiency
Thermal Shutdown    
  HV Start-up
Integrated Gate Drivers
Light Load Efficiency
Thermal Shutdown
Wide DC input
X cap discharge integrated    
Integrated Gate Drivers
Light Load Efficiency
Supports external bias
Thermal Shutdown    
HV Start-up
Integrated Gate Drivers
Light Load Efficiency
Thermal Shutdown
Wide AC input
Wide DC input
X cap discharge integrated    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
SOIC | 14     SOIC | 8     SOIC | 14     SOIC | 14     SOIC | 14    
14SOIC: 59 mm2: 6 x 9.9 (SOIC | 14)     8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)     14SOIC: 59 mm2: 6 x 9.9 (SOIC | 14)     14SOIC: 59 mm2: 6 x 9.9 (SOIC | 14)     14SOIC: 59 mm2: 6 x 9.9 (SOIC | 14)    

Design tool

WEBENCH® Designer UCC256302

  Min   Max Range
Vin  V 30 to 500V
Product Option
Vout  V 5 to 400V
Iout  A ≤ 100A
Ambient Temp  °C -40 to 125°C