Stereo non-inverting Gainclone, LM3886 based

C 2010 version. 1.2 E. Wijkamp

(schematics)

(parts list) L R L R Power R11 R21 1KΩ 1/8W C51 C61 2,2µF 63V bi-polair TR01 230V - 2x27V 250W R12 R22 22KΩ 1/8W C52 C62 100pF 100V ceramic 5mm R13 R23 1KΩ 1/8W C53 C63 10µF 50V 5mm SW01 Mains switch R14 R24 20KΩ 1/8W C54 C64 100nF 100V MKT 5mm F01 Mains fuse R15 R25 10Ω 1 W C55 C65 100nF 100V MKT 5mm R16 R26 10KΩ 1/8W C56 C66 100µF 25V 5mm B01 B500-C5000 R51 R61 22KΩ 1/8W C57 C67 100µF 25V 5mm R52 R62 22KΩ 1/8W D01 LED red R53 R63 10KΩ 1/8W C11 C21 2,2µF 63V bi-polar D02 LED green R54 R64 1KΩ 1/8W C12 C22 22µF 50V 5mm IC01 uA7812 C13 C23 100nF 100V MKT 5mm IC02 uA7912 R01 R02 22KΩ 1/8W C14 C24 100nF 100V MKT 5mm R03 R04 470Ω 1 W C15 C25 100nF 100V MKT 5mm C16 C26 220µF 63V 5mm Misc. C17 C27 220µF 63V 5mm IC13 IC23 NE5532AN C18 C28 100µF 63V 5mm IC14 IC24 LM3886TF C01 C03 100nF 100V MKT 5mm Conn strip 2 (4x) C02 C04 6800µF 63V round 30 mm Conn strip 3 (1x) C05 C06 100nF 100V MKT 5mm

Stereo non-inverting Gainclone, LM3886 based

C 2010 version. 1.2 E. Wijkamp

(modified parallel)

(specs) Output Power 68W x 2 (4Ω

Operating voltage 28V - 0 - 28V

Operating type Class AB type amplifier

Input Impedance 22K

Output Impedance 4Ω - 8Ω Part Number: LM 3886 T/TF Vpeak at Load 34,03 Volts

Vcc/Vee (+/-) 38 Volts Ipeak in Load 4,25 A

Abs. Max Voltage 42 Volts 1% THD Output @ 72,38 Watts

Voltage Headroom 4 Volts Gain (Not for BTL) 21 V/V

RL (load impedance) 8 W Gain (Not for BTL) 26,45 dB

Rf (feedback) 20 kW Lower -3dB cutoff 7,95 Hz

Ri 1 kW Input for 1% Output 1,6 VRMS

Ci 22 mF RM (Mute) 38 kW

RB 1 kW *RSN (Snubber) 2,7 W

*Rin 20 kW *CSN (Snubber) 0,1 mF

*Cin 1 mF Input Impedance 20 kW

Stereo non-inverting Gainclone, LM3886 based

C 2010 version. 1.2 E. Wijkamp

(layout) different versions