this circuit is good for 35w RMS into 4r at low thd- cannot comment on the layout; when I have used this topology I always put the 1875 in the middle;looks better and lays out with shorter paths
I use 1R5 base resistors and a 220n cap across the 1875 rails and no 0.2r tail resistors; you will also need an input capacitor across the 47k Rin to prevent emi RFI suseptability (I use 22k not 47k and 470pF)
otherwise this is a good device use.
In a former life I used a version of this bridged to deliver 100W into 1R from a single 22V rail for voice alarm with no problems other than heat.
I use 1R5 base resistors and a 220n cap across the 1875 rails and no 0.2r tail resistors; you will also need an input capacitor across the 47k Rin to prevent emi RFI suseptability (I use 22k not 47k and 470pF)
otherwise this is a good device use.
In a former life I used a version of this bridged to deliver 100W into 1R from a single 22V rail for voice alarm with no problems other than heat.
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- Can this set up increase the output power of LM1875 at 4 ohms??