原标题：PowerInt LNK584DG DER260零待机功耗离线电源解决方案

　　powerint公司的LinkZero-AX系列LNK584DG是零待机功耗离线电源开关器件,具有业界最低待机功耗,在230VAC时为3mW,满足IEC 62301零待机功耗定义,主要用在非隔离的待机电源和辅助电源.本文介绍了LNK584DG产品亮点,功能方框图,典型应用电路以及0.00W待机功耗的1.5W非隔离反激电源参考设计主要特性,电路图以及所用材料清单和变压器电路图.

　　Ultra low consumption isolated or non-isolated standby and auxiliary supplies

　　LinkZero-AX LNK584: Zero Standby Consumption Integrated Off-Line Switcher

　　LinkZero-AX combines extremely low standby/power down energy use with the industry’s lowest component count standby supply solution. Below 3 mW at 230 VAC in power down (PD) mode meets IEC 62301 definition of zero power consumption and is immeasur-able on most power meters. LinkZero-AX is set into PD mode using an external signal to pull the FEEDBACK pin high for 2.5 ms. Such an external signal can be generated by a system micro controller or infrared controller. In PD mode the BYPASS pin remains regulated allowing the LinkZero-AX to be woken up with a reset pulse to pull the BYPASS pin below a reset threshold. Ultra low system consumption is therefore achieved without needing to disconnect the input voltage with a relay.

　　LinkZero-AX is designed to be used in isolated or non-isolated converters. In either, the tightly specified FEEDBACK (FB) pin voltage reference enables universal input primary side regulated power supplies that cost effectively replace unregulated linear transformer and other switched mode supplies. The start-up and operating power are derived directly from the DRAIN pin. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI, minimizing filter cost.

　　LNK584DG产品亮点:

　　Lowest System Cost with Zero Standby Consumption

　　• Simple system configuration provides zero consumption standby/power down with user controlled wake up

　　• Very tight IC parameter tolerances improves system manufac­turing yield

　　• Suitable for low-cost clampless designs

　　• Frequency jittering greatly reduces EMI filter cost

　　• Extended package creepage improves system field reliability Advanced Protection/Safety Features

　　• Hysteretic thermal shutdown protection – automatic recovery reduces field returns

　　• Universal input range allows worldwide operation

　　• Auto-restart reduces delivered power by >85% during short-circuit and open loop fault conditions

　　• Simple ON/OFF control, no loop compensation needed

　　• High bandwidth provides fast turn on with no overshoot EcoSmart™ –Energy Efficient

　　• Standby/power down consumption less than 3 mW at 325 VDC input (Note 1)

　　• Easily meets all global energy efficiency regulations with no added components

　　• ON/OFF control provides constant efficiency to very light loads

　　LNK584DG应用:

　　• Ultra low consumption isolated or non-isolated standby and auxiliary supplies

　　图1.LNK584DG功能方框图

　　图2.LNK584DG非隔离电路图:1.5W(5V/300mA) 0.00W待机功耗电源

　　采用LinkZeroTM-AX LNK584DG的1.5W非隔离反激电源0.00W待机功耗参考设计

　　参考设计主要特性:

　　Non-isolated design provides tight regulation.

　　Low cost, low component count solution

　　Power Down (PD) Mode set and reset functionality. Less than 5 mW no load consumption at 230 VAC (IEC62301 Clause 4.5 rounds standby power use below 5 mW to zero)

　　Auto-restart functionality provides protection against output short circuit and open loop

　　conditions

　　Hysteretic over temperature shutdown protection

　　Meets EN-550022 and CISPR-22 Class B conducted EMI with more than 10 dB margin.

　　Meets IEC61000-4-5 Class 3 AC line surge specifications

　　This report describes a universal input, 5 V, 300 mA non-isolated flyback power supply which is designed with LNK584DG device from the LinkZero-AX family of ICs. It contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the supply, extensive documentation of the power transformer,along with test data and oscillographs of the most important electrical waveforms.

　　图3.参考设计外形图(顶视图)

　　参考设计电源指标:

　　图4.1.5W电源参考设计电路图

　　1.5W电源参考设计材料清单:

　　图5.变压器电路图