I need help to design a circuit to suppress amp peaks
To prevent surges from intermittent impedance one must be able to detect impedance rise and shutdown output faster than the part can fail or not change the output voltage fast than it can detect an open conduction.

If you sense current and voltage then differentiate both to produce a protective reaction from either an open or a short, using some capacitance limits the voltage slew rate. BUT one must be aware this creates a line LC resonant condition which creates a different problem. 

So slew rate must be managed in a control loop with a Bandwidth defined by your specs.

To systematically find an acceptable solution, one must 1st define measurable acceptance criteria or specs on surge current using Ohm's Law, energy stored with formulae like 1/2CV^2 and Safe Operating Current-time spec limit on your LEDs and drivers.

So always start a design problem with Specs rather than solutions that may become poor band-aids.  Such as dV/dt, dI/dt limit, soft-start spec, momentary interupt dV/dt limit.

The essential part of all of this is the current sense Resistor which are typically choosing for 100mV drop max or &lt;&lt; 0.25 W . But also remember if you shut off the current at too fast a slew rate the back EMF = V=LdI/dt from cable inductance.

The critical part of learning is how to master these concepts and learn by examples that work if you can find any such circuits.  They may not be as simple as you would like. 

This is why  CC power supplies are full of parts and not simply a CC regulator.  Power regulators often have OCP, OTP, UVP and step response times and overshoot to define these characteristics. 

This requires some System Control Theory experience, how to read datasheets on every part, then put it all together into a proper Design Spec.

One commercial part for this is called a crowbar clamp or ..


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Then you design the trigger and shutdown to release the SCR’s holding current and restart after a suitable delay.