TI UCC28710输出28V 350W电源参考设计.docxVIP

TI公司的UCC28710是反激电源控制器,不需要光耦提供隔离的恒压(CV)和恒流(CC)输出,内部集成了700V起动开关,动态控制工作状态,支持超低待机功耗, UCC28710系列中的控制算法使得工作效率满足或超过设备所需标准,最大工作效率100kHz,主要用于AC/DC电源,洗衣机和烘干机,电子仪表,智能手机,消费和烟雾检测,冰箱,太阳能逆变器,电路中断器,电动自行车,温度调温器,照明,服务器电源,多媒体电源等.本文介绍了UCC28710主要特性,框图, 简化反激转换器电路以及通用输入28V输出350W电源PSU参考设计主要特性,电路图和材料清单.The UCC28710 family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.?An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710, UCC28714 and UCC28715 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.UCC28710主要特性: 10-mW No-Load PowerPrimary-Side Regulation (PSR) Eliminates Opto-Coupler±5% Voltage and Current Regulation Across Line and Load700-V Start-Up Switch100-kHz Maximum Switching Frequency Enables High-Power Density Charger DesignsQuasi-Resonant Valley-Switching Operation for Highest Ov