TDA7053AT datasheet(9/16 Pages) PHILIPS

9 / 16 page

1997 Jul 15

Philips Semiconductors

Product speciﬁcation

Stereo BTL audio output ampliﬁer with DC

volume control

TDA7053A

Fig.11 Input signal handling.

THD = 1 %.

handbook, halfpage

020

VP (V)

Vin

(V)

2.0

0.4

MBG665

0.8

1.2

1.6

Fig.12 Volume control current as a function of

volume control voltage.

handbook, halfpage

IVC

(

µA)

2.0

VVC (V)

−10

−20

−30

MBG666

0.4

0.8

1.2

1.6

APPLICATION INFORMATION

The application diagram is illustrated in Fig.13.

Test conditions

Tamb =25 °C unless otherwise specified; VP =6V;

VDC = 1.4 V; fi = 1 kHz; RL =8 Ω.

The quiescent current has been measured without load

impedance.

The output power as a function of the supply voltage has

been measured at THD = 10%. The maximum output

power is limited by the maximum power dissipation and the

maximum available output current.

The maximum input signal voltage is measured at

THD = 1% at the output with a voltage gain of 0 dB.

To avoid instabilities and too high distortion, the input

ground and power ground must be separated as far as

possible and connected as close as possible to the IC.

The DC volume control can be applied in several ways.

Two possible circuits are shown below the main

application diagram. The circuits at the control pin will

influence the switch-on and switch-off behaviour and the

maximum voltage gain.

For single-end applications the output peak current must

not exceed 100 mA. At higher output currents the

short-circuit protection (MCL) will be active.

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