Other Parts Discussed in Thread: LM3150, LM134
Trying to design a power supply for a laser cutter that I want to integrate with a 3D printer. I've already made a 5A constant current supply using an LM5117, so that could be a starting point. But a cutting laser should be pulsed to reduce heating of the parts you don't want cut. I'd like to pulse it at 500 Hz and 50% duty cycle.
I noticed both the LM5117 (current mode control) and LM3150 (voltage mode) have ways to turn the regulator on and off. Will the regulator be fast enough to generate 10A pulses @ 500Hz?
Even if that's possible, I imagine I would also have to
1. Reduce the output capacitor to a minimum
2. Disable soft start - can I do this by replacing the SS capacitor with a resistor?
3. Not expect sharp square shaped pulses
appreciate your help
I tried to see what other people have done, but didn't find any design specifics:
www.photonics.com/.../_Introduction_to_Pulsed_Current_1_whitepaper.pdf
LM134 constant current switching
