Texas Instruments UCC256303 LLC Resonant Controller
Texas Instruments UCC256303 LLC Resonant Controller comes with an integrated high-voltage gate driver. The device 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 the PFC stage running all the time.
The UCC256303 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 the efficiency advantages of the LLC topology. The UCC256303 uses a hybrid hysteretic control to provide best-in-class line and load transient response. The control effort is approximately linearly proportional to the average input current in one cycle. This control makes the open-loop transfer function the first-order system so that it’s very easy to compensate. The system is always stable with proper frequency compensation.
Features
- Hybrid Hysteretic Control (HHC)
- Best-in-class transient response
- Easy compensation design
- Optimized low power features enable 75mW standby power design with PFC on
- Advanced burst mode optocoupler low power operation
- Helps enable compliance with CoC Tier II standard
- Fast exit from burst mode
- Improved capacitive region avoidance scheme
- Adaptive dead-time
- Internal high-side gate drivers (0.6A and 1.2A 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
- 35kHz to 1MHz Wide operating frequency range
- LLC Resonant controller in SOIC16 with high voltage clearance
- External bias required
Applications
- Digital TV SMPS
- AC-DC Adapter
- Gaming
- Desktop PC
Evaluation Module
Texas Instruments UCC25630-1EVM-291 LCC Evaluation Module (EVM)
Designed to help users evaluate the UCC256301, a LLC resonant controller and aid in their design.
Simplified Schematic
