OK I've just built an active load for testing PSU's ( I even used pic for the display and fan control) which I've tested at upto 60A or 100V and 500W cooling capacity. so I thought I'd try to build a Low Voltage boost converter to test it out and see how easy it is, as I've never actually needed to do one before(not including PFCU'S). I managed to get it to work at 28V and 9A ( I would have tried 10 A but I'm having a problem with my 8 year old 7Ah 12V lead acid battery as it drops down below 9 volts and its way over 30A) I've used some components that were lying around The parts are. IR SD51(obsolete part) as I remember 50A 50V IRFP064 (probably bigger than needed) 60V 9mR (520A peak !) ~100uH air cored inductor litz wire 3x(120x0.1) uc3843 with slope compensation and I used a current transformer as a resistor is getting impractical. It seemed just fine, I just need a decent battery now to fully test it. Richard ----- Original Message ----- From: "Bob J" To: "Microcontroller discussion list - Public." Sent: Tuesday, January 11, 2005 5:52 PM Subject: [EE] 28v boost converter > Would anyone happen to have any schematics adaptable to build a 12V to > 28V boost converter? I've looked at many of the switchers available, > but none are rated to supply the 10A required for my application. > > Regards, > Bob > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 10/01/2005 > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 10/01/2005 > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.0 - Release Date: 17/01/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.0 - Release Date: 17/01/2005 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist