Power IntegrationsLNK3204D 400W逆变器参考设计DER－870

Power Integrations公司的集成半桥BridgeSwitch™系列极大地简化高压逆变1相和3相PM或BLDC马达驱动的开发和生产.器件集成了两个高压(600V)N沟功率FREDFET,在单个小型封装内具有低边和高边驱动器.内部的功率FREDFET提供超软和超快二极管,非常适合硬开关逆变器驱动.两个驱动器采用自供电,从而不需要外接辅助电源.BridgeSwitch器件提供独特的瞬态相电流输出信号,简化了无传感器控制方案的实施.小型紧凑的占位面积安装扩展了爬电距离,允许两个功率FREDFET通过PCB进行散热.BridgeSwitch系列提供内部故障保护功能和外部系统电平监测.内部故障保护包括用于两个功率FREDFET和两级热过载保护的逐个周期的电流限制.外部系统电平监测包括带有四个欠压电平和一个过压电平以及驱动外部传感器如NTC的DC总线检测.全集成的半桥级效率高达99.2%,主要用在1或3相高压PM和BLDC马达驱动,高达400W逆变器输出功率,包括洗碗机和电冰雪的家用电器,高效空调的冷凝器风扇.本文介绍了BridgeSwitch™系列LNK3204D产品亮点,功能框图和典型3相逆变器电路,以及采用BRD1265C的3相逆变器电路图,采用BridgeSwitch马达驱动器BRD1267C和LinkSwitch-TN2 (LNK3204D)的400W三相逆变器DER-870主要特性,性能指标,电路图,材料清单和PCB设计图.

The BridgeSwitch™ family of integrated half-bridges dramaticallysimplifies the development and production of high-voltage inverterdriven 1- or 3-phase PM or BLDC motor drives. It incorporates twohigh-voltage N-channel power FREDFETs with low and high-side driversin a single small-outline package. The internal power FREDFETs offerultra-soft and ultrafast diodes ideally suited for hard switched inverterdrives. Both drivers are self-supplied eliminating the need for anexternal auxiliary power supply. BridgeSwitch provides a uniqueinstantaneous phase current output signal simplifying implementation ofsensor-less control schemes. The low-profile, compact footprint surfacemount package offers extended creepage distances and allows heatsinking of both power FREDFETs through the printed circuit board.

BridgeSwitch offers internal fault protection functions and externalsystem level monitoring. Internal fault protection includ...