Aug 5, 2009 #1 B berni80 Member level 2 Joined Jun 28, 2008 Messages 47 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,627 dc dc converter topologies Hi, I need to design a 250W DC/DC converter from 12V to 100V. I'm here to ask you experience on the topology selection. Here the main specs: Vin = 10-18V Vout = 100V Pout = 240W Tambient = 125°C The load will be highly impulsive (you can immagine a square pulse load with 25% of duty cycle) and I would like to use on-the-shelf magnetics. The targets of this design are small dimensions and robustness. Thanks!!
dc dc converter topologies Hi, I need to design a 250W DC/DC converter from 12V to 100V. I'm here to ask you experience on the topology selection. Here the main specs: Vin = 10-18V Vout = 100V Pout = 240W Tambient = 125°C The load will be highly impulsive (you can immagine a square pulse load with 25% of duty cycle) and I would like to use on-the-shelf magnetics. The targets of this design are small dimensions and robustness. Thanks!!
Aug 5, 2009 #2 D Dmitron Member level 5 Joined Jul 15, 2009 Messages 87 Helped 5 Reputation 10 Reaction score 2 Trophy points 1,288 Location Ukraine Activity points 1,639 converter topology selection push-pull is the typical Pout = 240*4= 960W for 25% time? How quickly will it change?
converter topology selection push-pull is the typical Pout = 240*4= 960W for 25% time? How quickly will it change?
Aug 6, 2009 #3 B berni80 Member level 2 Joined Jun 28, 2008 Messages 47 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 1,627 dc-dc converter topologies In fact the load is a triangle pulse: It starts form zero and reachs 30A in something like 200us, then goes rapidly to zero. The peak output power is 30A * 100V = 3kW... The main problem is the amount of out capacitor to damp this peak.. Is there any topology specifically designed for impulsive load? Maybe can a digital control can help?
dc-dc converter topologies In fact the load is a triangle pulse: It starts form zero and reachs 30A in something like 200us, then goes rapidly to zero. The peak output power is 30A * 100V = 3kW... The main problem is the amount of out capacitor to damp this peak.. Is there any topology specifically designed for impulsive load? Maybe can a digital control can help?
Aug 6, 2009 #4 D Dmitron Member level 5 Joined Jul 15, 2009 Messages 87 Helped 5 Reputation 10 Reaction score 2 Trophy points 1,288 Location Ukraine Activity points 1,639 converter topology I guess you need on/off control with comparator. Make some hysteresis and allow the SMPS go at full power or not work at all. The problem is Feedback speed, wich can be to slow for you application.
converter topology I guess you need on/off control with comparator. Make some hysteresis and allow the SMPS go at full power or not work at all. The problem is Feedback speed, wich can be to slow for you application.