Audio_amplifiers_with_short_circuit_protection

Published:2009/7/22 4:01:00 Author:Jessie | From:SeekIC

This circuit makes optimum use of economy transistors in discrete-component amplifiers that will operate safely under any usable load conditions, including shorts. Figures 1-15B, 1-15C, and 1-15D show the transistor complement, resistor values/power-supply voltages, and heatsink requirements, respectively, for various power outputs from 35 to 100 W. Input sensitivity is 1 Vrms into 10 kΩ for full-rated output power. Frequency response is less than 3-dB rolloff from 10 Hz to 100 kHz, referenced to t kHz. Power bandwidth is the full-rated output power ±2 dB from 20 Hz to 20 kHz. Figures 1- 15E and 1- 15F show the load sensitivity and power bandwidth. Total harmonic distortion (THD) is less than 0.2% at any power level between 100 mW and full-rated output and at any frequency between 20 Hz and 20 kHz. Inter modulation distortion is less than 0.2% at any power level from 100 mW to the full-rated output (60 Hz and 7 kHz mixed 4 to 1 )



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