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TDA1521 датащи(PDF) 8 Page - NXP Semiconductors |
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TDA1521 датащи(HTML) 8 Page - NXP Semiconductors |
8 / 14 page July 1994 8 Philips Semiconductors Product specification 2 x 12 W hi-fi audio power amplifier TDA1521 TDA1521Q APPLICATION INFORMATION Input mute circuit The input mute circuit operates only during switching on and off of the supply voltage. The circuit compares the 1/2 supply voltage (at pin 3) with an internally fixed reference voltage (Vref), derived directly from the supply voltage. When the voltage at pin 3 is lower than Vref the non-inverting inputs (pins 1 and 9) are disconnected from the amplifier. The voltage at pin 3 is determined by an internal voltage divider and the external 100 µF capacitor. During switching on, a time delay is created between the reference voltage and the voltage at pin 3, during which the input terminal is disconnected, (as illustrated in Fig.3). Fig.3 Input mute circuit; time delay. |
Аналогичный номер детали - TDA1521 |
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Аналогичное описание - TDA1521 |
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