Version 4
SHEET 1 1680 1100
WIRE 240 160 160 160
WIRE 320 160 240 160
WIRE 480 160 400 160
WIRE 560 160 480 160
WIRE 640 240 640 160
WIRE 640 160 560 160
WIRE 800 160 720 160
WIRE 960 160 880 160
WIRE 1120 160 1040 160
WIRE 1280 160 1200 160
WIRE 560 320 560 160
WIRE 560 400 560 320
WIRE 400 320 400 160
WIRE 400 400 400 320
WIRE 800 240 800 160
WIRE 800 320 800 240
WIRE 640 400 560 400
WIRE 800 400 800 320
WIRE 800 400 720 400
WIRE 960 240 960 160
WIRE 960 320 960 240
WIRE 1120 240 1120 160
WIRE 1120 320 1120 240
WIRE 1280 240 1280 160
WIRE 1280 320 1280 240
WIRE 240 240 240 160
WIRE 160 240 160 160
FLAG 160 320 0
FLAG 400 480 0
FLAG 560 480 0
FLAG 800 480 0
FLAG 960 400 0
FLAG 1120 400 0
FLAG 1280 400 0
FLAG 640 160 OUT
FLAG 480 160 N_PLUS
FLAG 720 400 N_MINUS
SYMBOL voltage 160 144 R0
WINDOW 0 -48 4 Left 2
WINDOW 3 -71 114 Left 2
SYMATTR InstName Vin
SYMATTR Value SINE(0 0.707 1k)
SYMBOL cap 224 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName Cin
SYMATTR Value 1µ
SYMBOL res 304 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rin
SYMATTR Value 1k
SYMBOL res 464 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rbias
SYMATTR Value 1Meg
SYMBOL res 544 304 R0
SYMATTR InstName Ri
SYMATTR Value 1k
SYMBOL cap 544 400 R0
SYMATTR InstName Ci
SYMATTR Value 250µ
SYMBOL res 816 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rf
SYMATTR Value 20k
SYMBOL cap 704 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName Cf
SYMATTR Value 20p
SYMBOL ind 1040 144 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Lout
SYMATTR Value 0.7µ
SYMBOL res 1200 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName RLpar
SYMATTR Value 10
SYMBOL res 944 224 R0
SYMATTR InstName Rz
SYMATTR Value 10
SYMBOL cap 944 320 R0
SYMATTR InstName Cz
SYMATTR Value 0.1µ
SYMBOL res 1264 224 R0
SYMATTR InstName Rload
SYMATTR Value 8
TEXT -50 50 Left 2 ;LM3886 Non-Inverting Power Amp — LTspice schematic
TEXT -50 80 Left 2 ;Gain = 1+Rf/Ri = 21 (26 dB). Load = 8 ohm midrange.
TEXT -50 110 Left 2 ;Place TI LM3886.LIB here and replace behavioral amp with XU1 LM3886.
TEXT -50 500 Left 2 ;.ac dec 100 10 100k
TEXT -50 530 Left 2 ;.tran 0 10m 0 1u
TEXT -50 560 Left 2 ;.four 1k V(N_SPK)
TEXT -50 590 Left 2 ;Download TI model: https://www.ti.com/product/LM3886