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Power & Energy
Forum LinkZero-LP集成离线式开关IC(PI)
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  • 电源管理
  • ic
  • 离线
Related

LinkZero-LP集成离线式开关IC(PI)

urmif
urmif over 14 years ago

Power Integrations公司(PI)宣布推出其最新零空载功率产品系列LinkZero-LP。这款高度集成的离线式开关IC可在负载断开后自动进入创新的零输入功率模式,从而将空载功耗降至0瓦。新款IC适用于小型便携设备,如手机、媒体播放器、电子书阅读器、电动工具和电动牙刷等产品所使用的充电器和适配器,最高输出功率达3.2 W。

 

充电器与最终产品断开连接后仍插接在插座上所产生的能耗称为空载功耗,这部分功耗估计占移动设备全部能耗的三分之二。要想消除这部分能耗,除直接拔掉充电器外,截至目前唯一的方法就是添加一个机械开关,但移动设备充电器很少采用这种功能。LinkZero-LP不用机械开关就可以消除空载功耗,因为它采用了PI专利的EcoSmartTm 高效节能技术以及专有的断电模式,该模式能够检测到空载情况,然后禁止IC内部的高压MOSFET的开关。LinkZero-LP器件可以在检测到负载时自动重启动。

 

LinkZero-LP基于成功的LinkSwitchTm-LP系列IC设计而成,可广泛应用于手机充电器和其他低功率充电器/适配器应用。LinkZero-LP继承了LinkSwitch-LP所特有的简化性,设计电源时所使用的外围元件不超过20个。新器件甚至还能与现有的LinkSwitch-LP设计后向兼容,这样可在不增加元件数的情况下轻松、快速地实现零空载功率。

 

LinkZero-LP适合低成本的无箝位设计,它具有非常严格的IC参数容差,能提升系统制造的良品率。SO-8C封装中的爬电距离非常大,加上带迟滞热关断保护的集成700 V MOSFET,可进一步增强系统的现场应用可靠性。而且,100 kHz的工作频率可减小充电器尺寸,频率抖动功能可大幅降低EMI滤波的成本。

 

Power Integrations产品营销经理Silvestro Fimiani表示:“LinkZero-LP是能源吸血鬼的终结者,它能让设计师获得最佳的电源性能,同时不会增加系统的复杂度。这款新IC与Power Integrations近期推出的其他“零功耗”产品LinkZero-AX、CAPZeroTm及SENZeroTm一起,又一次奠定了PI在电源转换技术方面的领导地位,表明了我们致力于绿色节能的承诺。”

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