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TDA8552

2 × 1.4 W BTL audio amplifiers with digital volume control and headphone sensing

Philips Electronics 

Philips Semiconductors

2 × 1.4 W BTL audio amplifiers with digital

volume control and headphone sensing

Preliminary specification

TDA8552T; TDA8552TS

Application without volume control

If pins 6, 7 and 8 are hardwired together the device operates with the volume control setting at maximum.

When the supply voltage is connected and the device is switched from standby to mute or operating for the first time then

the gain is ramped up from −20 dB to +20 dB. This takes approximately 5 s.

This maximum gain setting is maintained until the supply voltage drops below the minimum value.

handbook, full pagewidth

balance left

VDD

VDD

up

volume

down

VDD

balance right

2.2 kΩ

UP/DOWN1

6

100 nF

TDA8552T

2.2 kΩ

UP/DOWN2

7

100 nF

MGM612

Fig.5 Volume and balance control using buttons.

1998 Jun 02

16

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