ESD_EFT_Surge 你了解多少？.pdfVIP

ESD, EFT, Surge - Don’t make a mess of them Hawk Tong Nov. 25th, 2013 1 Agenda ? Glance of IEC61000 ? Look into ESD,EFT,Surge ? ESD protection principle ? ESD protection components ? ESD and/or EOS comparison Glance of IEC61000 3 Priority Test Standard Port Voltage Level 1 EFT IEC61000 - 4 - 4 (5/50ns via capacitive clamp) Power lines ± 4 kV 4 Signal lines ± 2 kV 4 2 Surge IEC61000 - 4 - 5 (1.2/50 μs – 8/20 μs), 42? - 0.5μF Signal lines ± 0.5 kV 1 IEC61000 - 4 – 5 (1.2/50 μs – 8/20 μs), 2? - 18μF Power lines ± 1 kV 2 3 ESD IEC61000 - 4 - 2, in air gap Power and Signal lines ± 15 kV 4 IEC61000 - 4 - 2, in contact Power and Signal lines ± 8 kV 4 EMC = EMI + EMS IEC61000-3-2 IEC61000-4-2 IEC61000-4-4 IEC61000-4-5 ESD EFT SurgeIEC61000-3-3 Harmonic test Flicker test IEC 61000-4-xx is a set of about 25 testing specs from the IEC -2: ESD Immunity -3: Radiated RF EM Field Immunity -4: Electrical Fast Transient Immunity -5: Surge Immunity -6: Conducted RF Immunity -8 –9 –10: Magnetic Field Immunity -11: Voltage Dips Variations Immunity … many more IEC61000 Specifications summary 22:27 Look into ESD，EFT and Surge,1 5 P u l s e P o w e r - k W P u l s e P o w e r - M W Look into ESD EFT and Surge, 2 6 ? ESD考察设备在接收外界静电源所产生的直接放电或静电场干扰时的抵抗能力 ? EFT 模拟设备附近或设备所在的电网中发生切断感性负载时导致的脉冲干扰 ? Surge用来模拟自然雷击或电网中接入大容性负载时所产生的脉冲对设备的影响 Electrical Fast Transient bursts 7 Surge immunity 8 IEC61000-4-5 Surge voltage impulse Surge current impulse Close looking into ESD IEC61000-4-2 (ESD) ? Pulse period 1 seconds ? At least 3 positive and 3 negative pulse applied ? Maximum current peak is close to 30KA @±8KV ? Frequency range, 3MHz~3GHz Deep dive into ESD Electrostatic discharge (ESD) is another form of an electrical surge. 10 P u l s e E n e r g y - J o u l e Comparison of Device Level System Level ESD Specifications 2000V HBM is 1.3 Amps peak and about 150 ns wide. How does the IEC ESD stress differ from the tests we’ve been doing? 2000V CDM is 2 to 5 Amps peak (depending on packa