As shown in the figure, what is the role of R57, D13, C55, please analyze the wave in detail, thank you
Damien Posté sur January 5, 2021
In pmos tube gd and rcd circuit, this is also a method of freewheeling.
When with inductive load, panel_12V will generate negative high voltage. At this time, the g of pmos is pulled down, and pmos is turned on to form a continuous flow.
This is usually called active clamping.
Raymond Posté sur January 5, 2021
It is a typical RCD Snubber. As for why you want to add it like this, how to choose the parameters is determined by your load characteristics.
Maximus Posté sur January 5, 2021
Spike absorption combination.
