AN2689 datasheet(5/42 Pages) STMICROELECTRONICS

No. de pieza	AN2689

Descripción Electrónicos	Protection of automotive electronics from electrical hazards

PDF	42 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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5 / 42 page

AN2689

Electrical hazards in the automotive environment

Doc ID 14310 Rev 3

5/42

Figure 2.

Electromagnetic radiation in the automotive environment

1.2

Propagation of electrical hazards

1.2.1

Propagation on the data lines

Transients that are generated on data lines are mainly ESD surges which are low energy but

very high dv/dt and can generate a very strong electromagnetic field. These mainly concern

ISO 10605 and IEC 61000-4-2 standards.

The data lines concerned are communication lines like media transfer lines, data buses,

sensor data lines and so on.

Figure 3 shows surge forms of hazards that can be found on data lines.

Figure 3.

Kinds of surges on data lines

Battery

Equipment

needing protection

ECU

Spark

plug

Ignition coil

ABS

CAR

RADIO

...

Nominal

V dataline

±25 kV (1)

ISO 10605

±15 kV (1)

IEC 61000-4-2

±8 kV (2)

IEC 61000-4-2

±8 kV (2)

ISO 10605

(1): Air discharge

(2): Contact discharge

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