Author Topic: adding LED strip output to primarily 24vmotor driver board: circuit protection?  (Read 437 times)

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Offline k8943Topic starter

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Have a board with uC + stepper driver - it's powered by 24v and has a local 5v buck. Suddenly would like it to drive 20cm of bright 24v LED strip as well (circa 0.3A max).

First thought was a SOT-23 N-mosfet (circa 1.5A max) with a resistor pulling the gate down to ensure off at startup, PWM from uC thereafter. Then started to wonder about circuit protection (shorts in the lighting circuit). Would it make sense just to use a chunkier TO-220 mosfet and rely on the circuit protection at the 24v supply (cuts out around 2A with sense resistor + polyfuse on AC side)? Or is it appropriate to use something more dedicated? (Never used LED strip before.)
 


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