TDA1521 datasheet(8/14 Pages) PHILIPS

No. de pieza	TDA1521

Descripción Electrónicos	2 x 12 W hi-fi audio power amplifier

PDF	14 Pages

Scroll/Zoom	100%

Fabricante Electrónico	PHILIPS [NXP Semiconductors]

Página de inicio	http://www.nxp.com

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8 / 14 page

July 1994

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.

TDA1521 Datasheet(PDF) 8 Page - NXP Semiconductors