16-11-2014, 10:54 AM
At the risk of being accused of heresy, how about retaining the full wave rectifier and replacing the linear regulator with a a buck converter to gain the extra current?
O.K. it's going to generate interference but something like this http://www.ebay.co.uk/itm/Mini-DC-DC-Step-Down-Buck-Power-Supply-Module-Adjustable-Converter-MP1584-/251588582445?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item3a93d91c2d
based on the MP1584 can be pushed to operate at 1.5MHz and so might be good enough if filtered & screened well.
There are chips available with much higher switching frequencies but a quick look didn't find any complete modules.
Jim
O.K. it's going to generate interference but something like this http://www.ebay.co.uk/itm/Mini-DC-DC-Step-Down-Buck-Power-Supply-Module-Adjustable-Converter-MP1584-/251588582445?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item3a93d91c2d
based on the MP1584 can be pushed to operate at 1.5MHz and so might be good enough if filtered & screened well.
There are chips available with much higher switching frequencies but a quick look didn't find any complete modules.
Jim
