Make 50W amplifier with LM3886 LM3886 is a new high-fidelity high-power music IC with protection from overvoltage and overtemperature, which is simple and easy to manufacture. Its performance is as follows: VCC = ± 28V OUTPUT = 68W / 4Ω, 38W / 8Ω · VCC = ± 35V OUTPUT = 50W / 8Ω · Peak power: 135W · Signal to noise ratio ≥92db · Conversion rate: 19V / us · Intermodulation distortion: 0.04% · 11-pin TO-220 package · Mute function · SPiKeTM protection function There are two models of LM3886: LM3886TF and LM3886T, the former heat sink is insulated, the latter is not insulated. The following figure is the application circuit diagram provided by National Semiconductor Corporation: how about it? Simple. The following is a list of components: R1: 1KΩ 1 / 4W gold film RM: 33KΩ 1 / 4W gold film Ri: 1KΩ 1 / 4W gold film Rf1: 20KΩ 1 / 4W gold film R6: 10Ω / 3W L: 0.7uH Use Φ1 enameled wire to make 4 rounds on the signature pen, just remove it Ci: 10uF / 35V tantalum capacitor All other capacitors are 100uF / 50V electrolytic capacitors Potentiometer is 10KΩ finger |
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