hello,
description:
I'm designing a simple switcher.
It will be powered from the car (lorry) on-board voltage 24V.
It will drive solenoid of the pump of the heating.
Solenoid consumption is about i=1A, u=24V.
Clamping diode is connected parallel to the coil.
The output transistor Q1 is IRLR120 (V=100V, I=7.7A).
The driver for Q1 will be something like SA556 or PIC12...
Now I need protect the Q1 and the driver for Q1 against voltage spikes, they
are normally present in the car voltage.
I have read somewhere that on-board voltage can have spikes even over 100V.
My questions:
edit1: thank you MikeML for the littelfuse link. I have found http://www.ee.cityu.edu.hk/~emc/20098022ppt2.pdf ,page 20, ISO 7637-2 is exactly what I need.
description:
I'm designing a simple switcher.
It will be powered from the car (lorry) on-board voltage 24V.
It will drive solenoid of the pump of the heating.
Solenoid consumption is about i=1A, u=24V.
Clamping diode is connected parallel to the coil.
The output transistor Q1 is IRLR120 (V=100V, I=7.7A).
The driver for Q1 will be something like SA556 or PIC12...
Now I need protect the Q1 and the driver for Q1 against voltage spikes, they
are normally present in the car voltage.
I have read somewhere that on-board voltage can have spikes even over 100V.
My questions:
- what is the regular range of lorry on-board voltage 24V?
- where could I find information about it
- what kinds of voltage spikes can be there?
- How much energy they have?
- where could I find information about it
edit1: thank you MikeML for the littelfuse link. I have found http://www.ee.cityu.edu.hk/~emc/20098022ppt2.pdf ,page 20, ISO 7637-2 is exactly what I need.
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