Was- Stamps and automotive applications. NOW-automotive power supply
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I have a similar problem and was wondering if anyone has a rock solid power
supply design for automotive applications. I have a .jpg with what I have,
why it doesnt work and suggestions if I can post it here. Just let me know.
Here is what was suggested using a LM2931. I think my major problem was the
use of a LM341.
Mark
The best route to follow is:
Power in to a parallel 1000pf/1000v cap to ground connected to a series
diode (1N4004) connected to a 30v MOV(varistor)to ground followed by a
330uF 35 v electrolytic feeding a LM2931 low dropout 5v regulator
properly heat sinked. The output feeds a 0.1uf and 1.0uF in parallel.
This will get you a great starting point.
Make sure all module inputs have .01uf to ground.
Make sure all ICs have 0.1uf across power and ground.
Make sure your resonator/crystal has the proper series resistance.
Make all traces as short as possible and use 2-z copper if possible on
your PCB.
Finally, place your design in a grounded metal box and you are sure to
have success.
supply design for automotive applications. I have a .jpg with what I have,
why it doesnt work and suggestions if I can post it here. Just let me know.
Here is what was suggested using a LM2931. I think my major problem was the
use of a LM341.
Mark
The best route to follow is:
Power in to a parallel 1000pf/1000v cap to ground connected to a series
diode (1N4004) connected to a 30v MOV(varistor)to ground followed by a
330uF 35 v electrolytic feeding a LM2931 low dropout 5v regulator
properly heat sinked. The output feeds a 0.1uf and 1.0uF in parallel.
This will get you a great starting point.
Make sure all module inputs have .01uf to ground.
Make sure all ICs have 0.1uf across power and ground.
Make sure your resonator/crystal has the proper series resistance.
Make all traces as short as possible and use 2-z copper if possible on
your PCB.
Finally, place your design in a grounded metal box and you are sure to
have success.