Powerint LNK576DG超低无负载功耗8W电源解决方案

Powerint公司的LNK576DG是LinkZero-LP系列产品之一,无负载时的功耗小于5mW,大大低于IEC所定义的无负载时的功耗,主要用在移动/无绳电话,PDA,电动工具,MP3, 剃须刀等充电器.本文介绍了LinkZero-LP系列产品亮点, 功能框图以及超低无负载功耗8W电源评估板主要指标,电路图,材料清单和PCB布局图.

Chargers for cell/cordless phones, PDAs, power tools, MP3/portable audio devices, shavers, etc LinkZero-LP, an upgrade to PI’s popular LinkSwitch-LP, incorporates new technology which enables the device to automatically enter into and wake up from no-load mode while disipating less than 5 mW - substantially less than the IEC definition of zero no-load power consumption. The tightly specified FEEDBACK pin voltage reference enables universal input primary side regulated power supplies with accurate constant voltage from 5% to full load. Start-up and operating power are derived directly from the DRAIN pin which eliminates start-up circuitry. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI, minimizing filter cost.

LinkZero-LP系列产品亮点:

Lowest System Cost with Zero No-Load
Automatically enters zero input power mode when load is disconnected
Simple upgrade to existing LinkSwitch-LP designs..

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