UCC256304 Wide Vin LLC Resonant Controller With High-Voltage Start Up Enabling Low Standby Power | TI.com

UCC256304 (ACTIVE)

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

Wide Vin LLC Resonant Controller With High-Voltage Start Up Enabling Low Standby Power - UCC256304
 

Description

The UCC256304 is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed to pair with a PFC stage 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.UCC256304 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 and is always stable with proper frequency compensation.

The UCC256304 is unique in that the controller is able to operate over a large DC input range. This is accomplished by making the input overvoltage sense threshold much larger than the input voltage start threshold. This allows the LLC to startup and enter a low power standby mode without the need to enable the PFC and enables the LLC to accommodate an extensive range of common AC inputs.

UCC256304 provides a highly 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.

Features

  • 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)
  • Nemko Certification for X Cap Discharge Function
  • Wide DC Input Range
  • Enables Wide AC Input Range
  • PFC Startup Not Required For LLC Startup
  • Create a Custom Design Using the UCC256304 With the WEBENCH® Power Designer

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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)
Pin/Package
UCC256304 UCC25600 UCC256301 UCC256302 UCC256303
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     13     11.25    
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
Wide AC input
Wide DC input
X cap discharge integrated    
  HV Start-up
Integrated gate drivers
Light Load Efficiency
Thermal Shutdown
Wide DC input
X cap discharge integrated    
HV Start-up
Integrated gate drivers
Light Load Efficiency
Thermal Shutdown    
Integrated gate drivers
Light Load Efficiency
Supports external bias
Thermal Shutdown    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
14SOIC     8SOIC     14SOIC     14SOIC     14SOIC    

WEBENCH® Designer UCC256304

  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