Philips TDA7052AT-N2, TDA7052A-N2 Datasheet

DATA SH EET

Product speciﬁcation File under Integrated circuits, IC01

July 1994

INTEGRATED CIRCUITS

TDA7052A/AT

1 W BTL mono audio amplifier with DC volume control

July 1994 2

Philips Semiconductors Product speciﬁcation

1 W BTL mono audio ampliﬁer with DC volume control

TDA7052A/AT

FEATURES

• DC volume control

• Few external components

• Mute mode

• Thermal protection

• Short-circuit proof

• No switch-on and off clicks

• Good overall stability

• Low power consumption

• Low HF radiation

• ESD protected on all pins

GENERAL DESCRIPTION

The TDA7052A/AT are mono BTL output amplifiers with DC volume control. They are designed for use in TV and monitors, but 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

Notes

1. SOT97-1; 1996 September 10.

2. SOT96-1; 1996 September 10.

SYMBOL PARAMETERS CONDITIONS MIN. TYP. MAX. UNIT

positive supply voltage range 4.5 − 18 V

output power

TDA7052A R

= 8 Ω; VP = 6 V 1.0 1.1 − W

TDA7052AT R

= 16 Ω; VP = 6 V 0.5 0.55 − W

maximum total voltage gain 34.5 35.5 36.5 dB φ gain control range 75 80 − dB I

total quiescent current VP = 6 V; RL = ∞−712mA THD total harmonic distortion

TDA7052A P

= 0.5 W − 0.3 1 %

TDA7052AT P

= 0.25 W − 0.3 1 %

EXTENDED TYPE

NUMBER

PACKAGE

PINS PIN POSITION MATERIAL CODE

TDA7052A 8 DIL plastic SOT97

(1)

TDA7052AT 8 mini-pack plastic SOT96A

(2)

July 1994 3

Philips Semiconductors Product speciﬁcation

1 W BTL mono audio ampliﬁer with DC volume control

TDA7052A/AT

handbook, full pagewidth

positive input

MCD385 - 1

TDA7052A TDA7052AT

I + i

8I – i

TEMPERATURE

PROTECTION

signal

ground

DC volume

control

n.c.

positive output

negative output

power

ground

ref

STABILIZER

Fig.1 Block diagram.

PINNING

SYMBOL PIN DESCRIPTION

1 positive supply voltage IN+ 2 positive input GND1 3 signal ground VC 4 DC volume control OUT+ 5 positive output GND2 6 power ground n.c 7 not connected OUT− 8 negative output

handbook, halfpage

1 2 3 4

8 7 6 5

MCD384

OUT –

GND2 OUT +

GND1

IN +

n.c.

TDA7052A

TDA7052AT

Fig.2 Pin configuration.

July 1994 4

Philips Semiconductors Product speciﬁcation

1 W BTL mono audio ampliﬁer with DC volume control

TDA7052A/AT

FUNCTIONAL DESCRIPTION

The TDA7052A/AT are mono BTL output amplifiers with DC volume control, designed for use in TV and monitors but also suitable for battery fed portable recorders and radios.

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

In the TDA7052A/AT the DC volume control stage is integrated into the input stage so that no coupling capacitors are required and yet a low offset voltage is maintained. At the same time the minimum supply 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.

Thus a reduced power supply with smaller capacitors can be used which results in cost savings.

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 35.5 dB. The DC volume control stage has a logarithmic control characteristic.

The total gain can be controlled from 35.5 dB to −44 dB. If the DC volume control voltage is below 0.3 V, the device switches to the mute mode.

The amplifier is short-circuit proof to ground, V

and across the load. Also a thermal protection circuit is implemented. If the crystal temperature rises above +150 °C the gain will be reduced, so the output power is reduced.

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

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC 134)

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

supply voltage range − 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% TDA7052A − 1.25 W TDA7052AT − 0.8 W

amb

operating ambient temperature range −40 +85 °C

stg

storage temperature range −55 +150 °C

virtual junction temperature − +150 °C

short-circuit time − 1hr

input voltage pin 2 − 8V

input voltage pin 4 − 8V

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