15W audio power amplifier circuit diagram composed of OPA604

Published:2011/8/1 3:03:00 Author:Ecco | Keyword: 15W , audio power amplifier | From:SeekIC

Figure 1 is l5W audio power amplifier circuit constituted by the OPA604. OPA604 has FET-input with the working voltage in ± 25V, and the conversion rate in 25V/μs, and GB is the 2OMHz excellent high-frequency op amp, which is used as the pre-amplifier to get low-level distortion. RP1 is used to adjust the load current of power transistor in 35mA; VD3 and VD4 are used to limit output current in short circuit, and when the circuit works normally, they are in the cut-off state.



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