[原创] TI UCC28633 24V 65W离线反激电源参考设计

TI公司的UCC28633是具有初级侧稳压功能和峰值功率模式的高功率反激控制器,内置700V起动电流源,其功能强大的栅极驱动器能工作在CCM和DCM模式,使它适合用在各种功率的电源.峰值电源模式能使瞬态峰值功率高达正常功率的200%,而峰值电流仅增加25%.主要用在笔记本,游戏控制台和打印机的AC/DC适配器,开架SMPS,10W-65W高效AC/DC电源.本文介绍了UCC28633主要特性,框图, 19.5V/65W适配器应用电路图以及24V 65W离线反激电源参考设计主要特性,电路图和材料清单.

The UCC2863x targets high-power, primary-side regulated flyback converters. The powerful gate driver and ability to operate in both CCM and DCM make the device suitable for applications with a wide power range. The peak power mode allows transient peak power delivery up to 200% of nominal rating, with only a 25% peak current increase, maximizing transformer utilization.

The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling and processing techniques allow CCM operation, and deliver excellent output voltage regulation performance for opto-coupler-less designs at power levels of 100 W and above.
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