rge can couple into
ed on to dump energy into Rclamp
ground on the base),
nt
pass conducted emission tests without a CM inductor. I just want that indu ctor to be small so if I have a good clamp I do not need that function else where
sistors. Say we turn them on for 1us (or lower), so they clamp some energy without damaging them. The problem with that route is that it will only wor k if the unit is up and running
zener from rail to gate, zener from gate to ground?
NT
E1.pdf
surge can couple into
rned on to dump energy into Rclamp
to ground on the base),
yront
ll pass conducted emission tests without a CM inductor. I just want that in ductor to be small so if I have a good clamp I do not need that function el sewhere
ansistors. Say we turn them on for 1us (or lower), so they clamp some energ y without damaging them. The problem with that route is that it will only w ork if the unit is up and running
might as well let it avalanche, the energy should be roughly the same
-Lasse
Well, the part survived, which is the aim of the surge supression activity.
You can record the energy level absorbed. Was it an amount that can be absorbed reliably at the repetition rate anticipated? (Tjmax)
What about other parts connected to the circuit? The 'load' ?
RL
I remember someone I worked with muddling with a zener between drain and gate, to force the MOSFET on in case of any spike above the breakdown voltage.
joe
transistors. Say we turn them on for 1us (or lower), so they clamp some ene rgy without damaging them. The problem with that route is that it will only work if the unit is up and running
The difference is you could set the zener arrangement to conduct at 32v rat her than 40, reducing energy dissipation.
NT
Have something to add? Share your thoughts — no account required.
Ask the community — no account required