high power regulator


Posted on Feb 5, 2014

The half linear design is simply so you can get away with small thermal considerations, if the linear only needs to handle 1-5w in place of the full 75w per rail. as for the MOSFET to regulate with them means operating them in there linear region, just below the rated voltage for rson, however mosfets are not ideal for a supply as they have gate c


high power regulator
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apacitance delaying there response to transients unless driven quite hard As for op amp regulators being noisy its is partly correct was just throwing up the option any regulator with a set pin can function adequately pulling it below zero with some pissy little milliamp rated winding is all thats required, and allows an output voltage down to zero, with how much voltage just being the net offset voltage of the regulator and the pass element personally prefer to not have a piece of metal close to or exceeding 100 degrees in my lab, but if you wish to go linear then by all means sounds like you have the pieces to do it. As a secondary throught if you went with full linear how would you isolate you few thousand uF capacitors from boiling eevblogfan, here is a couple of suggestions on how to use the LT3080 to drive a 300+ W power stage. Q2 is a (low saturation voltage) current amplifier that drives two (or more) forced air cooled 150W (or more) power transistors. Of course, to fully utilise the LT3080 capabilities you might need faster power transistors than the 2N3772/2N3055 shown at the drafts. Additionally, if your LT3080 drives a power stage instead of the load directly, R8 shuts the power stage off, providing the first milliamperes to the load by the LT3080 itself and after that the power stage takes over; R9 ensures that the LT3080 will never provide more than 40mA, keeping it always cool on the PCB -no need to mount it...




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