PFC & LLC
Achieve higher effiency, reduce THD, and improve power density with our PFC and LLC controllers
Zero-voltage switching, noise immunity, optimized load performance
Paired together, our PFC and LLC controllers offer best in class performance for power rsupplies ranging from 100W to 2-kW. With features like zero-voltage switching, low EMI, high FSW capability, and optomized load performance, LLC controllers offer excellent audible noise immunity while delivering integarted features to simplify system designs. Our PFC controller portfolio delivers the highest efficiency, reduced standby, superiour power factor, and improved distortion which meet challenging standards for switch-mode power supplies (SMPS).
Browse products by category
Single-phase PFC controllers
Interleaved PFC controllers
LLC controllers
Design & development resources
评估板
UCC25660 评估模块
UCC25660EVM-064 可帮助设计人员评估 UCC25660 LLC 谐振控制器的运行情况和性能。此评估模块 (EVM) 演示了 UCC25660 如何控制 LLC 谐振半桥直流/直流转换器，以在负载和输入电压范围内实现高效率。此 EVM 可接受 365V 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。
参考设计
180W 通用输入 PFC + LLC 电视电源参考设计
这款用于电视应用的交流/直流电源设计通过通用交流电压（90V 交流至 264V 交流）提供 12V/5A 和 150V/0.8A 输出。该设计使用 CRM/DCM PFC 控制器 UCC28056 和 LLC 控制器 UCC256404，具有增强突发模式以实现低待机功耗和更低的可闻噪声。该设计可在 150mW 负载时实现 <250mW 的待机功耗，并可在 230V 交流输入时实现 >93% 的峰值效率。
评估板
UCC28056B、UCC256404 和 UCC24624 交流至隔离式 DC EVM
PFCLLCSREVM034 是一个 168W 交流/直流电源，包含转换模式功率因数校正前端以及具有同步整流功能的隔离式半桥 LLC 谐振转换器。此 EVM 可接受 90Vrms 至 264Vrms 的交流输入，并且输出电压为 12VDC，满负载输出功率为 168W。
技术资源
视频
Implementation of wide output LLC in power tool charging and LED lighting applications
This video session will cover practical implementations and design considerations of achieving a variable output voltage using LLC.
应用手册
使用混合迟滞控制改善 LLC 转换器的瞬态响应 (Rev. B)
Learn how an innovative LLC control methodology, hybrid hysteretic control (HHC) offers superior transient performance and an simplified LLC power stage.
视频系列
Power factor correction (PFC) basics and design considerations
This video series discusses PFC basics, topology comparisons, and design considerations to achieve a cost-optomizeda and efficienct PFC design.