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UCC256301

NOT RECOMMENDED FOR NEW DESIGNS

Wide vin LLC resonant controller with high-voltage start up enabling ultra-low standby power

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Data sheet
UCC256301 is not recommended for new designs
This product continues to be available for existing customers. New designs should consider an alternate product.
open-in-new Compare alternates
Same functionality with different pin-out to the compared device
NEW UCC25660 ACTIVE Wide VIN and VOUT 750kHz LLC controller Capable of higher operating frequency and supports wider VIN/VOUT operation
Similar functionality to the compared device
UCC256404 ACTIVE LLC resonant controller with ultra-low power, ultra-quiet standby operation and high voltage startup This part offers lower audible noise in applications

UCC256301

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Control mode Current Topology Half bridge, LLC Rating Catalog Features High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, Light load efficiency, Over Temperature Protection, Wide DC input, X capacitor discharge integrated
Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Control mode Current Topology Half bridge, LLC Rating Catalog Features High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, Light load efficiency, Over Temperature Protection, Wide DC input, X capacitor discharge integrated
SOIC (DDB) 14 59.4 mm² 9.9 x 6
  • 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)
  • LLC Resonant Controller in SOIC16
    with High Voltage Clearance
  • Create a Custom Design Using the UCC256301 With the WEBENCH® Power Designer
  • 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)
  • LLC Resonant Controller in SOIC16
    with High Voltage Clearance
  • Create a Custom Design Using the UCC256301 With the WEBENCH® Power Designer

The UCC256301 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, and with PFC stage running all the time. UCC256301 includes a range of features designed to make LLC converter operation well controlled and robust. This device aims to unburden the LLC designer and allow mainstream applications to benefit from efficiency advantages of the LLC topology.

UCC256301 uses hybrid hysteretic control to provide best in class line and load transient response. The control effort is approximately linear proportional to average input current in one cycle. The control makes the open loop transfer function a first order system so that it’s very easy to compensate. The system is always stable with proper frequency compensation.

UCC256301 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.

The UCC256301 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, and with PFC stage running all the time. UCC256301 includes a range of features designed to make LLC converter operation well controlled and robust. This device aims to unburden the LLC designer and allow mainstream applications to benefit from efficiency advantages of the LLC topology.

UCC256301 uses hybrid hysteretic control to provide best in class line and load transient response. The control effort is approximately linear proportional to average input current in one cycle. The control makes the open loop transfer function a first order system so that it’s very easy to compensate. The system is always stable with proper frequency compensation.

UCC256301 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.
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* Data sheet UCC256301 Hybrid Hysteretic Mode Wide VIN LLC Resonant Controller Enabling Ultra-Low Standby Power datasheet (Rev. C) PDF | HTML 17 Jan 2020

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