Thursday, March 7, 2013

High End 120W MOSFET IC Driven Amp.







National
Semiconductor has been fast at work designing analog products for the
high-end audiophile market. As for­tune would have it, these products
such as the LM4780 Power Amplifier Chip and the LM4702 Driver Chip are
easy to implement into high-quality designs for the audio DIYer.


National
recently introduced the LM4702, a high-voltage driver chip that
interfaces bipolar or MOSFET output devices. The LM4702 provides two
small signal, input stages and voltage amplifica­tion stages (VAS). All you need to do is design a suitable bias system and output stage.


Not
to be outdone in making the job easy for us amateurs, National provides
a comprehensive design outline, guide to printed circuit board
construction, ideas for the power supply, bill of materials, and
suggested layout. In an application note dated May 2006
1,
the company de­scribed an amplifier using high-qual­ity construction
techniques and off-the-shelf passive components. The result is an
amplifier with a vanishingly low level of distortion, 0.0006%.

http://www.box.net/shared/s4d4ihzs5g

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