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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

ESD Standard for VehicleISO 10605

Southeastern Michigan IEEE EMC

2011/Nov./10

Noise Laboratory Co.,LTD

Takeshi Ishida

my position at iec iso committees
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

esd standards
ESD Standards

*Similar to MIL,JEDEC,ANS,ESDA,etc

timeline of iso10605
Timeline of ISO10605

Have some flaws

1994ISO TR 10605

2001ISO 10605 Ed1.0

2008ISO 10605 Ed2.0

2012?ISO 10605 Ed2.0 Amendment1

electrostatic discharge path outside
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.
electrostatic discharge path inside
Electrostatic discharge path – Inside
  • The discharge path is capacitance between human and back of the seat.
esd effects to electronics equipment
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

mathematical formula 150pf 330
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

calibration setup of discharge current waveform
Calibration setup of discharge current waveform

【 Ed.1】【 Ed.2】

Requirement detail is not mentioned

detail of discharge current waveform calibration
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

target calibration annex a
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

comparison of current waveform
Comparison of current waveform

Ed.1 Target

Ed.2 Target

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

ESD generator

Frequency

principle of specific current waveform
Principle of specific current waveform

Simulation waveform

Simplified equivalent circuit

principle of specific current waveform1
Principle of specific current waveform

Simulation waveform

Actual waveform

Normal gun

No capacitor in gun

actual human body discharge current waveform
Actual human body discharge current waveform

When the target is touched by human with electrode. (air discharge tip)

1A/div10ns/div

1A/div500ps/div

requirement of ed 1 current waveform
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

air discharge calibration is removed from ed 2
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
test setup bench test
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.

test setup bench test1
Test setup(Bench test)
  • Resistor cable
    • 470kΩ resistor on each end
    • To eliminate HCP charge voltage
    • To avoid a resonance of cables
test setup bench test2
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

test setup bench test ed 1
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

effect of insulation block
Effect of insulation block
  • Arrangement of DUT
experiment of insulation block
Experiment of insulation block

Stray capacitance

10pF

Stray capacitance

259pF

Currentprobe

insulation

150×250mm

Metal plate

25mm

2mm

experiment of insulation block1
Experiment of insulation block

【no insulation block (direct mount)】

Test voltage:2kV

6.6A

2 A/div

experiment of insulation block2
Experiment of insulation block

Test voltage:2kV

6.5A

5.5A

4.5A

2.1A

Ed.2

2mm

Ed.1

25mm

2 A/div

experiment of insulation block3
Experiment of insulation block

【No elimination of charge】

Test voltage:2kV

1st

2nd

3rd

Ed.2

2mm

Ed.1

25mm

2 A/div

experiment of insulation block4
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

discharge test mode
Discharge test mode

※In case of >15kV may need large round tip(to avoid charge leak)

comparison of electrode shape
Comparison of electrode shape

Φ30mm φ22mm Standard air tip

comparison of electrode shape1
Comparison of electrode shape

30kVφ30mm tip

Requirement for vehicle

30kVStandard tip

bench test direct
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

bench test direct ed 2
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
bench test indirect
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

bench test indirect ed 2
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
radiated e field by indirect discharge
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

component packaging and handling test
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

component packaging and handling test1
Component packaging and handling test

No dissipative mat, if the DUT mounted body directly.

component packaging and handling test2
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.
vehicle test inside
Vehicle test - Inside

Grounding to door hinge

vehicle test outside
Vehicle test - Outside

Grounding towheel with plate

Door hinge

vehicle test ed2
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.
test level of air discharge
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

experiment of small gap discharge
Experiment of small gap discharge

Reference: Mr.Masamitsu Honda Impulse physics laboratory

http://www.impulse-physics.com/index.html