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TDA2050H Folha de dados(PDF) 11 Page - STMicroelectronics |
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TDA2050H Folha de dados(HTML) 11 Page - STMicroelectronics |
11 / 13 page A circuit for generating the test signal is given in fig. 19. The load network consists of a 40 µF capacitor, in series with a 1 ohm resistor. The capacitor limits the current due to the 20 Hz signal to a low value, whereas for he short pulses the effective load im- pedance is of the order of 1 ohm, and a high out- put current is produced. Using this signal and load network the measure- ment may be made without causing excessive dissipation in the amplifier. The dissipation in the 1 ohm resistor is much lower than a rated output power of the amplifier, because the duty-cycle of the high output current is low. By feeding the amplifier output voltage to the X- plates of an oscilloscope, and the voltage across the 1 ohm resistor (representing the output cur- rent) to the Y=plates, it is possible to read on the display the value of the maximum instantaneous output power. The result of this test applied at the TDA 2050 is: PEAK POWER = 100W typ Figure 19: Test circuit for peak power measurement TDA2050 11/13 |
Nº de peça semelhante - TDA2050H |
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Descrição semelhante - TDA2050H |
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