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ESD Standard for Vehicle ISO 10605

ESD Standard for Vehicle ISO 10605. Southeastern Michigan IEEE EMC 2011/Nov./10 Noise Laboratory Co.,LTD Takeshi Ishida. My position at IEC & ISO Committees. IEC TC77. ISO TC22 WG4. SC77A Low frequency. The Japanese national committee. SC77B High frequency. WG10 RF. MT12

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ESD Standard for Vehicle ISO 10605

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  1. ESD Standard for VehicleISO 10605 Southeastern Michigan IEEE EMC 2011/Nov./10 Noise Laboratory Co.,LTD Takeshi Ishida

  2. My position at IEC & ISO Committees IEC TC77 ISO TC22 WG4 SC77A Low frequency The Japanese national committee SC77B High frequency WG10 RF MT12 ESD・Surge SC77C High power

  3. ESD Standards *Similar to MIL,JEDEC,ANS,ESDA,etc

  4. Timeline of ISO10605 Have some flaws 1994ISO TR 10605 2001ISO 10605 Ed1.0 2008ISO 10605 Ed2.0 2012?ISO 10605 Ed2.0 Amendment1

  5. Electrostatic discharge path – Outside • The discharge may occur by voltage difference between human and vehicle. • The discharge path is 1)Wheel resistance. 2)Capacitance between vehicle and ground.

  6. Electrostatic discharge path – Inside • The discharge path is capacitance between human and back of the seat.

  7. ESD effects to electronics equipment ESD Disturbance of RF Surface current Voltage potential Noise from signal enclosure EM coupling by secondary radiation Signal port Digital circuit Noise from power line Power port Stray capacitance

  8. Discharge resistor and energy capacitor New H.V.PS

  9. Tolerance is not all same Discharge current waveform specification

  10. Ideal contact discharge waveform at 5kV 150pF/330pF，330Ω First peak is same Actual waveform

  11. Ideal contact discharge waveform at 5kV 150pF/330pF，2000Ω Actual waveform

  12. Mathematical formula(150pF/330Ω) 1 = 1.1 ns2 = 2 ns 3 = 12 ns 4 = 37 ns I 1= 16.6 A （ at 4 kV ）　　I 2 = 9.3 A （at 4 kV） n = 1.8

  13. Calibration setup of discharge current waveform 【 Ed.1】【 Ed.2】 Requirement detail is not mentioned

  14. Detail of discharge current waveform calibration Faraday cage Stray capacitance between gun and faraday cage Faraday cage Target Oscilloscope ESD generator H.V PS Bandwidth of oscilloscope: >1 GHz Ground return cable

  15. Target calibration（ Annex A） • No frequency specification on Ed.1 target • Target frequency response:～1GHz：<±0.5dB • Target mechanical structure is described in Annex B Ed2 Ed1

  16. Comparison of current waveform Ed.1 Target Ed.2 Target

  17. Frequency response on Ed.2 target • 100kHz-4GHzliner scale • 0.5dB/div • S21 Specification～1GHz：<±0.5dB ESD generator Frequency

  18. Principle of specific current waveform Simulation waveform Simplified equivalent circuit

  19. Principle of specific current waveform Simulation waveform Actual waveform Normal gun No capacitor in gun

  20. Actual human body discharge current waveform When the target is touched by human with electrode. （air discharge tip） 1A/div10ns/div 1A/div500ps/div

  21. Requirement of Ed.1 current waveform • Rise time • Contact ：0.7-1.0ns • Air < 5ns：at 15kV(repeatability: 6/10） • RC interval time SAE requirement is < 20 ns Impossible to measure Rough specification No second peak Notactual shape

  22. Air discharge calibration is removed from Ed.2 • Annex E（informative）Rationale for air discharge generator verification • Due to the complexity of air discharge, no satisfactory verification method has been developed. Therefore it was decided not to require an air discharge verification. • General … • Amenable to humidity • Discharge phenomenon is changed by surface condition of electrode and/or DUT. • Rise time may faster, if discharge voltage is low. • Positive and negative rise time is differed

  23. Test setup（Bench test） • Table（non-conductive）height：0.7-1.0m • HCP： minimum 1.6 x 0.8 m, Plus 0.1m greater than DUT/cables. • Material:：cupper, brass, aluminum thickness: >0.25 mm HCP means vehicle body Needed for outside testing.

  24. Test setup（Bench test） • Resistor cable • 470kΩ resistor on each end • To eliminate HCP charge voltage • To avoid a resonance of cables

  25. Test setup（Bench test） IEC :0.5mm • Insulation block height: 50±5mm • Insulation support thickness: 2-3mm (e.g. polyethylene). No insulation support for direct mount DUT

  26. Test setup（Bench test）Ed.1 50mm width ground strap？ • Capacitor: 330pF • Interval: >5s • Each polarity 3 times • Air discharge approach speed: <5mm/s Battery ESD gun exerciser Ground cable Ground connection point is unclear Insulation block 25mm

  27. Effect of insulation block • Arrangement of DUT

  28. Experiment of insulation block Stray capacitance 10pF Stray capacitance 259pF Currentprobe insulation 150×250mm Metal plate 25mm 2mm

  29. Experiment of insulation block 【no insulation block (direct mount)】 Test voltage:2kV 6.6A 2 A/div

  30. Experiment of insulation block Test voltage:2kV 6.5A 5.5A 4.5A 2.1A Ed.2 2mm Ed.1 25mm 2 A/div

  31. Experiment of insulation block 【No elimination of charge】 Test voltage:2kV 1st 2nd 3rd Ed.2 2mm Ed.1 25mm 2 A/div

  32. Experiment of insulation block 【positive shot after negative 10 times with no elimination of charge】 Test voltage:2kV 10.3A 7.9A Ed.2 2mm Ed.1 25mm 2 A/div

  33. Discharge test mode ※In case of >15kV may need large round tip（to avoid charge leak）

  34. Comparison of electrode shape Φ30mm φ22mm Standard air tip

  35. Comparison of electrode shape 30kVφ30mm tip Requirement for vehicle 30kVStandard tip

  36. Bench test （Direct） 1 DUT 2 ESD generator 3 ESD generator main 4 Non conductive table 5 HCP 6 Ground point 7 Ground connection 8 remotely accessible parts of the DUT 9 Periphery 10 Battery 11 Insulation support 12 Insulation block13 470kΩresistors 14 GRP （optional）　15 HCP ground connection Vehicle body potential Ground potential

  37. Bench test （Direct）

  38. Bench test （Direct） Ed.2 • Connect chassis-mounted electronic modules directly to the HCP. • DUT shall be connected to all peripheral units • The supply battery shall be on the test table, with the negative terminal of the battery directly connected to the HCP. • The ESD generator shall be configured with the 330 pF or 150 pF capacitor depending on the DUT location in the vehicle. • Apply the ESD at each specified test voltage and polarity (see Annex C). • The test voltages (in accordance with Annex C) shall be increased, using at least two values, • At least 3 discharges shall be applied by not less than 1 s interval. • Charge build-up can be eliminated by briefly connecting a bleeder wire with high resistance ( 1 MΩ) • Wait by natural charge decay. • Air-ionizers may be used to speed up

  39. Category of test level： Annex C

  40. Bench test （Indirect） Ed.2 New Radiated E-field 1 DUT 2 ESD generator 3 ESD generator main 4 Non conductive table 5 HCP 6 Ground point 7 Ground connection 8 remotely accessible parts of the DUT 9 Periphery 10 Battery 11 Insulation support 12 Insulation block 13 470kΩresistors 14 GRP （optional） 15 HCP ground connection 16 HCP or ESD ground connection

  41. Bench test （Indirect）

  42. Bench test （Indirect） Ed.2 • Connect chassis-mounted electronic modules directly to the HCP. • DUT located distance of 0,1 m away from the HCP edges. • DUT shall be connected to all peripheral units • The supply battery shall be on the test table, with the negative terminal of the battery directly connected to the HCP. • The ESD generator shall be configured with the 330 pF or 150 pF capacitor depending on the DUT location in the vehicle. • Apply the ESD at each specified test voltage and polarity (see Annex C). • The test voltages (in accordance with Annex C) shall be increased, using at least two values, • At least 50 discharges shall be applied by not less than 50ms interval. • Discharges to coupling planes, the discharge tip is in the same plane as the HCP

  43. Radiated E-field by Indirect discharge Oscilloscope Opt E-field sensor * O/E ESD generator Opt fiber 20ns/div 0.55ns (1.8GHz) 1ns/div *Wide band lithium niobate antenna

  44. Component packaging and handling test Ed.2 New 1 DUT 2 ESD generator 3 ESD generator main 4 Non conductive table 5 HCP 6 Ground point7 Ground connection 8 dissipative mat

  45. Component packaging and handling test No dissipative mat, if the DUT mounted body directly.

  46. Component packaging and handling test • DUT is unpowered condition. • DUT locate on dissipative mat, Connect chassis-mounted electronic modules directly to the HCP. • The ESD generator shall be configured with 150 pF capacitor. • To access recessed connector pins, an insulated solid wire with a cross-section between 0,5 mm2 and 2 mm2 and a maximum length of 25 mm shall be used. • The test voltages (in accordance with Annex C) shall be increased, using at least two values, • At least 3 discharges shall be applied each polarity by not less than 1s interval. • Charge build-up should be eliminated. • DUT shall pass complete function testing successfully.

  47. Vehicle test - Inside Grounding to door hinge

  48. Vehicle test - Outside Grounding towheel with plate Door hinge

  49. Vehicle test Ed2 • Conductive surfaces shall be tested using contact mode discharges. Air discharge may also be applied to conductive surfaces. • For areas accessible only from the inside of the vehicle, the ESD generator ground connection shall be connected directly to the grounded metallic part of the body (e.g. seat railing, door latch). • For outside, the ESD generator ground connection can be connected directly to the nearest metallic part, or directly to a metal plate placed under the wheel. • The engine of the vehicle shall be running in drive or idle mode. • Choose a generator capacitance of 330 pF for areas that can easily be accessed only from the inside of the vehicle and resistance of 330 Ω or 2 kΩ. • Choose a capacitance of 150 pF for points that can easily be touched only from the outside of the vehicle and resistance of 330 Ω or 2 kΩ. • The test voltages (in accordance with Annex C) shall be increased, using at least two values, • At least 3 discharges shall be applied each polarity by not less than 1s interval. • Charge build-up should be eliminated. • DUT shall pass complete function testing successfully.

  50. Test level of Air discharge ・At least two severity levels must be tested. Reason 1 The air discharge pathdepend on voltage levels. Reason 2 Rise time depend on the distance of discharge. The IEC 61000-4-2 is described only air discharge Discharge path is differed

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