Inrush module for input filter

[cupoftea]

Hi,
Do you know of any nice cheap offtheshelf
inrush modules (smd) for the attached input filter.?
We think surely there must be, its a general ubiquitous situation.
Otherwise we will have to do discrete.

As is known, The three 0.33Rs are MMB0207...they will not survive the inrush transient. Hence we need the inrush limiting.
The three MMB0207s are needed because the electro caps are not rated for the ripple current, which is 7A ACrms, into the Buck converter.

 

[KlausST]

Hi,

filter or inrush_current_limiter?

For DC inrush current limiter there are so called "hot swap controllers".

Klaus

 

[scopeprobe]

Hi,
Do you know of any nice cheap offtheshelf
inrush modules (smd) for the attached input filter.?
We think surely there must be, its a general ubiquitous situation.
Otherwise we will have to do discrete.

As is known, The three 0.33Rs are MMB0207...they will not survive the inrush transient. Hence we need the inrush limiting.
The three MMB0207s are needed because the electro caps are not rated for the ripple current, which is 7A ACrms, into the Buck converter.

Can you use more inductance and less capacitance in the filter? You'd get the additional reistance of the higher inductance, more impedance and also less capacitance.