8_A_CURRENT_BOOSTER

Published:2009/7/6 6:53:00 Author:May | From:SeekIC

High-compliance power stage for LM143 high-voltage opamp provides very high peak drive currents along with output voltage swings to within 4 V of ±38 V supply under full load. Maximum output current depends on setting of current-adjusting pot R11 and on output voltage. Limit ranges from 14 A when R11 is 0 down to about 4 A for 5K. Maximum power output is 144 WRMS, for which frequency response is 3 dB down at 10 kHz. Voltage gain is 21. Q3-Q6 should be on common Thermalloy 6006B or equivalent heat-sink,- Linear Applications, Vol. 2, National Semiconductor, Santa Clara, CA, 1976, AN-127, p 5-6.



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