PowerInt HiperPFS－4系列高效电源PFC控制方案

PowerInt公司的HiperPFS-4系列PFS7623-7629/7633-7636是集成了600V MOSFET的PFC控制器,不需要外接电流检测电阻,在整个负载范围内有最大化效率和最小化EMI,效率大于95%,230VAC时无负载功耗小于60mW,和EN61000-3-2 Class C与Class D兼容,主要用在PC,LCD TV,笔记本电脑,电器,电泵,马达,风扇,打印机和LED照明.本文介绍了HiperPFS-4系列产品亮点和主要特性,功能框图,典型应用电路框图以及采用HiperPFSTM-4 PFS7627H的275W PFC前端参考设计DER-547主要特性,电路图,材料清单和PCB设计图.
The HiperPFS™-4 devices incorporate a continuous conduction mode (CCM) boost PFC controller, gate driver and 600 V power MOSFET in a single, low-profile (GROUND pin connected) power package. HiperPFS-4 devices eliminate need for external current sense resistors and their associated power loss, and use an innovative control technique that adjusts the switching frequency over output load, input line voltage, and input line cycle.
This control technique maximizes efficiency over the entire load range, particularly at light loads. Additionally, it minimizes the EMI filtering requirements due to its wide bandwidth spread spectrum effect. The HiperPFS-4 uses advanced digital techniques for line monitoring, line feed-forward scaling, and power factor enhancement; while using analog techniques for the core controller in order to maintain extremely low no-load power consumption. The HiperPFS-4 also features an integrated non-linear error amplifier for enhanced load transient response, a user programmable Power Good (PG) signal as well as user selectable power limit functionality. HiperPFS-4 includes Power Integrations’ standard set of comprehensive protection features, such as UV, OV, brown-in/out, and hysteretic thermal shutdown. HiperPFS-4 also provides cycle-by-cycle current limit and Safe Operating Area (SOA) protection of the power MOSFET, output power limiting for overload protection, and pin-to-pin short-circuit protection .
HiperPFS-4’s innovative variable frequency continuous conduction mode operation (VF-CC...