Wavecom G1900 Manual de usuario descargar pdf (Pagina 13)

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5.2.2. Electric environment

The following figure sum up electrical constraints in an automotive

environment:

Length of transient

Cause

Energy

capability

Voltage

Amplitude

Possible

frequency of

application

Steady state Failed Voltage Regulator oo

+ 18 V

Infrequent

3 - 5 minutes Jump start with 24 V

battery

+/- 24 V

Infrequent

200ms to 400ms Load dump - i.e.,

disconnection of battery

while at high charging

rates

≥10 J

≤125V

Infrequent

< 0.32 s Inductive Load Switching

Transient

<1 J

-300V to +80V

Often

< 0.20 s Alternator Field Decay <1 J

-100V to -40V

Each Turn-Off

90ms Ignition Pulse, Battery

Disconnected

<0.5 J

≤75V

<500Hz Several

Times in vehicle

Life

1ms Mutual Coupling in

Harness (Note)

<1 J

<200V

Often

15µs Ignition Pulse, Normal <0.001 J

<3V

<500Hz

Continuous

Accessory Noise <1.5V 50 Hz to 10 KHz

Transceiver Feedback 20mV R.F.

Note : These transients may be present on any wire in the vehicle.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 24 25

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Wavecom G1900 Manual de usuario Pagina 13

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