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Chip Amps Amplifiers based on integrated circuits

LM4780 PCB power transformer
LM4780 PCB power transformer
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Old 6th January 2005, 06:16 PM   #1
Jim Karr is offline Jim Karr  United States
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Default LM4780 PCB power transformer

I just populated a pair of Brian's LM4780 boards, and now it's time to apply voltage.

I am a bit unclear....is this bridge designed to accept a center tap transformer 25-0-25 or the AC output from each of two different, separate secondaries with identical voltages?
As for me and my household, we shall serve the Lord. Joshua
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Old 6th January 2005, 06:29 PM   #2
jackinnj is offline jackinnj  United States
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LM4780 PCB power transformer
I am using 20-0-20 with dual independent secondaries -- this puts out a little under + and - 28V .

make sure that the LM4780 is snugged up to the heatsink --- I found that when it is properly affixed the distortion went down by about 0.03% This chip doesn't like to get real hot. (see the thread I started on heatsinking the LM4780).
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