LM4808 typical circuit diagram for two-channel headphone amplifier

Published:2011/8/16 21:49:00 Author:Rebekka | Keyword: two-channel headph amplifier | From:SeekIC

Figure shows the LM4808 for dual-channel amplifier typical circuit. Left and right channel audio signals are inputed LM4808 2, 6 feet respectively. After being amplified by internal amplifier, then they will be output by the foot 1, 7 respectively. The coupling capacitor Co isadded to the speaker. Amplifier gain is determined by resistors Ri and Rf, Av = Rf / Ri. The maximum power is PDMAX=VDD2／2π2RL. The LM4808 packaging has two amplifiers, so the total power consumption should be multiplied by 2.It is applied in a large temperature rangeenvironment , LM4808 does not install the heat sink. External input resistors and capacitors determine the input-3dB bandwidth: Input-3dB bandwidth fi-3db = 1/2πRiCi; Output-3dB bandwidth fo-3dB = 1/2πRLCo.



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