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|31st July 2008, 10:18 PM||#1|
Join Date: Apr 2008
Location: United States
yet another lm3886 design
just figured i'd post my first design for an LM3886-based amplifier. the amp schematic follows the National datasheet for all practical purposes, and the power supply is an unregulated, snubberized supply. (8 ohm load)
amplifier, single channel:
so here are my questions... i'm planning on using a 25-0-25 (RMS) toroidal transformer with dual secondaries. would a rating of around 250VA suffice? also, is the ~4.7uF DC-blocking cap at the inputs truly necessary? if so, is there any reason why i can't wire it point-to-point between the RCA input and the amp board?
the parts i've chosen for the boards are here: (digikey part numbers)
any reason i shouldn't be OK with a heatsink such as this one ?
also, if there are any blatant errors with the board layouts, i'm open to all forms of criticism.
thanks a bunch,
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