Onsemi NCP1680图腾柱临界导通模式(CRM)PFC控制器解决方案
Onsemi公司的NCP1680是临界导通模式功率因数校正(CRM)PFC控制器,设计用于无桥图腾柱拓扑. 无桥图腾柱PFC是功率因素架构,包括在PWM开关频率驱动的快速开关腿和工作在AC线路频率的第二个腿.这种拓扑不需要在通常PFC电路输入所存在的二极管桥,允许功率级效率有明显的改进.DCM的频率折返具有25kHz最低频率,非常轻负载条件下采用跳跃模式,专用电流检测方案,数字电压回路补偿,AC线路监测电路和AC相位检测,所有工作模式接近1的功率因素.主要用在功率因素修正,离线电源,工业电源,通信5G电源,网络电源,游戏控制台电源以及UHD TV电源.本文介绍了NCP1680主要特性和优势,采用NCP1680的CrM图腾柱PFC典型应用电路以及评估板NCP1680 EVB主要指标,主板和子板电路图,材料清单和PCB设计图.
The NCP1680 is a CRM PFC controller IC designed to drive the bridgeless totem-pole PFC topology. The bridgeless totem-pole PFC is a power factor correction architecture that consists of a fast switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency. This topology eliminates the diode bridge present at the input of a conventional PFC circuit, allowing significant improvement in the power stage efficiency.
NCP1680主要特性:
Totem Pole PFC Topology Eliminates Input Diode Bridge
Critical Conduction Mode (CRM) Operation
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