The UCC25640x is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed to pair with a PFC controller 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.

UCC25640x provides a highly efficient burst mode with soft-on and soft-off periods to minimize audible noise at standby operation. The burst power level and hysteresis are programmable, simplifying the optimization of efficiency and burst mode operation. Burst mode can also be disabled through pin configuration. UCC25640x uses hybrid hysteretic control to provide best in class line and load transient response.

UCC25640x includes a range of features designed to make LLC converter operation well controlled and protected. It can be used with UCC28056 or UCC28064A PFC controllers, along with UCC24624 synchronous rectifier controller to offer a complete power supply solution.

• Optimized low power mode and burst mode algorithm
  • Burst mode with Soft-ON and Soft-OFF periods
  • Minimized audible noise at no load and standby
  • User option to disable burst mode
  • Opto-coupler low power operation
  • Efficiency performance exceeds DoE Level VI and EU CoC Tier-2 External Power Supply Standards
• Hybrid hysteretic control (HHC)
  • Best-in-class transient response
  • Fast exit from burst mode
• Robust adaptive dead-time control
• Integrated high-voltage gate driver with 0.6 A source and 1.2 A sink capability
• Robust capacitive region (ZCS) avoidance scheme
• Over temperature, output over voltage, input under voltage protection, three levels of over current protection
• Integrated high voltage startup function
• Active X-capacitor discharge function

• Control mode
• Current
• Features
• LLC, HV Start-up, Hybrid Hysteretic Control, Light Load Efficiency, Low Power, Programmable Soft Start, Thermal Shutdown, Zero Voltage Switching
• Operating temperature range (C)
• -40 to 125
• Supply voltage (Max) (V)
• 30
• Supply voltage (Min) (V)
• 13
• Topology
• Half-Bridge, Resonant LLC
• Rating
• Catalog

UCC256402的完整型号有：UCC256402ADDBR、UCC256402ADDBT、UCC256402DDBR、UCC256402DDBT，以下是这些产品的关键参数及官网采购报价：

UCC256402ADDBR，工作温度：-40 to 125，封装：SOIC (DDB)-14，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC256402ADDBR的批量USD价格：.785（1000+）

UCC256402ADDBT，工作温度：-40 to 125，封装：SOIC (DDB)-14，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC256402ADDBT的批量USD价格：.932（1000+）

UCC256402DDBR，工作温度：-40 to 125，封装：SOIC (DDB)-14，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC256402DDBR的批量USD价格：.785（1000+）

UCC256402DDBT，工作温度：-40 to 125，封装：SOIC (DDB)-14，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC256402DDBT的批量USD价格：.932（1000+）

UCC25640EVM-020 — UCC25640x 半桥 LLC 评估模块

UCC25640EVM-020 是一款使用 UCC256404 的 180W、LLC 谐振转换器。此 EVM 可接受 360V 至 410V 的直流输入和 85VAC 至 264VAC 的交流输入电压，并且输出电压为 12VDC，满负载输出功率为 180W。