1998 Feb 23

2

NXP Semiconductors

Product specification

3 W mono BTL audio amplifier with DC

volume control

TDA7056AT

FEATURES

• DC volume control

• Few external components

• Mute mode

• Thermal protection

• Short-circuit proof

• No switch-on or switch-off clicks

• Good overall stability

• Low power consumption

• Low HF radiation

• ESD protected on all pins.

GENERAL DESCRIPTION

The TDA7056AT is a mono Bridge-Tied Load (BTL) output

amplifier with DC volume control. It is designed for use in

TVs and monitors, but is also suitable for battery-fed

portable recorders and radios. The device is contained in

a 20-lead small outline package.

A Missing Current Limiter (MCL) is built in. The MCL circuit

is activated when the difference in current between the

output terminal of each amplifier exceeds 100 mA

(300 mA typ.). This level of 100 mA allows for

Single-Ended (SE) headphone applications.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage

4.5

−

18

V

output power

33.5

−

W

maximum total voltage gain

34.5

35.5

36.5

dB

ΔG

v

voltage gain control range

75

80

−

dB

total quiescent current

816

mA

THD

total harmonic distortion

−

0.3

1

%

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA7056AT

SO20

plastic small outline package with 20 leads; body width 7.5 mm

SOT163-1