Philips TDA7053A-N2 Datasheet

DATA SH EET

Product speciﬁcation Supersedes data of 1995 Nov 09 File under Integrated Circuits, IC01

1997 Jul 15

INTEGRATED CIRCUITS

TDA7053A

Stereo BTL audio output amplifier with DC volume control

1997 Jul 15 2

Philips Semiconductors Product speciﬁcation

Stereo BTL audio output ampliﬁer with DC volume control

TDA7053A

FEATURES

• DC volume control

• Few external components

• Mute mode

• Thermal protection

• Short-circuit proof

• No switch-on and switch-off clicks

• Good overall stability

• Low power consumption

• Low HF radiation

• ESD protected on all pins.

GENERAL DESCRIPTION

The TDA7053A (2 × 1 W) and TDA7053AT (2 × 0.5 W) are stereo BTL output amplifiers with DC volume control. The devices are designed for use in TV and monitors, but are also suitable for battery-fed portable recorders and radios.

Missing Current Limiter (MCL)

A MCL protection circuit is built-in. The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 100 mA (typical 300 mA). This level of 100 mA allows for headphone applications (single-ended).

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

supply voltage 4.5 − 18 V

out

output power VP=6V

TDA7053A R

=8Ω 0.85 1.0 − W

TDA7053AT R

=16Ω 0.5 0.55 − W

voltage gain 39.5 40.5 41.5 dB

gain control 68.0 73.5 − dB

q(tot)

total quiescent current VP=6V; RL=∞−22 25 mA

THD total harmonic distortion

TDA7053A P

out

= 0.5 W − 0.3 1 %

TDA7053AT P

out

= 0.25 W − 0.3 1 %

TYPE

NUMBER

PACKAGE

NAME DESCRIPTION VERSION

TDA7053A DIP16

plastic dual in-line package; 16 leads (300 mil); long body

SOT38-1

TDA7053AT SO16

plastic small outline package; 16 leads; body width 7.5 mm

SOT162-1

1997 Jul 15 3

Philips Semiconductors Product speciﬁcation

Stereo BTL audio output ampliﬁer with DC volume control

TDA7053A

BLOCK DIAGRAM

Fig.1 Block diagram.

MSA717 - 2

I i

STABILIZER

TEMPERATURE

PROTECTION

ref

I i

ΙΙ

power

ground 1

power

ground 2

107

signal

ground

input 1

DC volume

control 1

input 2

DC volume

control 2

TDA7053A

TDA7053AT

positive output 1

negative output 1

negative output 2

1,3,11,15

not

connected

positive output 2

1997 Jul 15 4

Philips Semiconductors Product speciﬁcation

Stereo BTL audio output ampliﬁer with DC volume control

TDA7053A

PINNING

SYMBOL PIN DESCRIPTION

n.c. 1 not connected VC1 2 DC volume control 1 n.c. 3 not connected V

I (1)

4 voltage input 1

5 positive supply voltage

I (2)

6 voltage input 2 SGND 7 signal ground VC2 8 DC volume control 2 OUT2+ 9 positive output 2 PGND2 10 power ground 2 n.c. 11 not connected OUT2− 12 negative output 2 OUT1− 13 negative output 1 PGND1 14 power ground 1 n.c. 15 not connected OUT1+ 16 positive output 1

Fig.2 Pin configuration.

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10

VC1

n.c.

I (1)

I (2)

SGND

VC2

OUT1

PGND1

PGND2

OUT1 OUT2

OUT2

n.c.

TDA7053A

TDA7053AT

n.c.

MSA719 - 2

FUNCTIONAL DESCRIPTION

The TDA7053A and TDA7053AT are stereo output amplifiers with two DC volume control stages, designed for TV and monitors, but also suitable for battery-fed portable recorders and radios.

In conventional DC volume control circuits the control or input stage is AC coupled to the output stage via external capacitors to keep the offset voltage low.

The two DC volume control stages are integrated into the input stages so that no coupling capacitors are required and a low offset voltage is still maintained. The minimum supply voltage also remains low.

The BTL principle offers the following advantages:

• Lower peak value of the supply current

• The frequency of the ripple on the supply voltage is twice

the signal frequency.

Consequently, a reduced power supply with smaller capacitors can be used which results in cost reductions.

For portable applications there is a trend to decrease the supply voltage, resulting in a reduction of output power at conventional output stages. Using the BTL principle increases the output power.

The maximum gain of the amplifier is fixed at 40.5 dB. The DC volume control stages have a logarithmic control characteristic. Therefore, the total gain can be controlled from +40.5 to −33 dB.

If the DC volume control voltage falls below 0.4 V, the device will switch to the mute mode.

The amplifier is short-circuit protected to ground, V

and across the load. A thermal protection circuit is also implemented. If the crystal temperature rises above 150 °C the gain will be reduced, thereby reducing the output power.

Special attention is given to switch-on and switch-off clicks, low HF radiation and a good overall stability.

1997 Jul 15 5

Philips Semiconductors Product speciﬁcation

Stereo BTL audio output ampliﬁer with DC volume control

TDA7053A

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

THERMAL CHARACTERISTICS

Power dissipation

TDA7053A:

Assume V

= 6 V and RL=8Ω. The maximum sine wave dissipation is 2 × 0.9 W = 1.8 W. The R

th j-a

of the package is 50 K/W therefore T

amb(max)

= 150 − (50 × 1.8) = 60 °C.

TDA7053AT:

Assume V

= 6 V and RL=16Ω. The maximum sine wave dissipation is 2 × 0.46 W = 0.92 W. The R

th j-a

of the package is 95 K/W therefore T

amb(max)

= 150 − (95 × 0.92) = 62.6 °C.

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

supply voltage − 18 V

ORM

repetitive peak output current − 1.25 A

OSM

non-repetitive peak output current − 1.5 A

tot

total power dissipation T

amb

≤ 25 °C TDA7053A − 2.5 W TDA7053AT − 1.32 W

short-circuit time − 1hr

input voltage pins 2, 4, 6 and 8 − 5V

amb

operating ambient temperature −40 +85 °C

stg

storage temperature −55 +150 °C

virtual junction temperature − +150 °C

SYMBOL PARAMETER VALUE UNIT

th j-a

thermal resistance from junction to ambient in free air

TDA7053A 50 K/W TDA7053AT 95 K/W

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