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TDA8551

1 W BTL audio amplifier with digital volume control

Philips Electronics 

Philips Semiconductors

1 W BTL audio amplifier with digital volume control

Product specification

TDA8551

FEATURES

• One pin digital volume control

• Volume setting with UP/DOWN pulses

• Flexibility in use

• Few external components

• Low saturation voltage of output stage

• standby mode controlled by CMOS compatible levels

• Low standby current

• No switch-on/switch-off plops

• High supply voltage ripple rejection

• Protected against electrostatic discharge

• Outputs short circuit safe to ground, VP and across the

load

• Thermally protected.

GENERAL DESCRIPTION

The TDA8551; TDA8551T is a one channel 1 W

Bridge-Tied Load (BTL) audio power amplifier capable of

delivering 1 W output power to an 8 Ω load at THD = 10%

using a 5 V power supply. The circuit contains a BTL

power amplifier, a digital volume control and standby/mute

logic. The TDA8551T comes in an 8 pin SO package and

the TDA8551 in a 8 pin DIP package.

APPLICATIONS

• Portable consumer products

• Personal computers

• Telephony.

QUICK REFERENCE DATA

SYMBOL

VP

Iq

Istb

Po

Gv

nvol

THD

SVRR

PARAMETER

supply voltage

quiescent current

standby current

output power

voltage gain

number of volume steps

total harmonic distortion

supply voltage ripple rejection

CONDITIONS

MIN.

2.7

VP = 5 V

−

−

THD = 10%; RL = 8 Ω; VP = 5 V 1

−60

−

Po = 0.5 W

−

48

TYP.

5

6

−

1.4

−

64

0.15

−

MAX. UNIT

5.5 V

10

mA

10

µA

−

W

+20 dB

−

−

%

−

dB

ORDERING INFORMATION

TYPE

NUMBER

TDA8551T

TDA8551

NAME

SO8

DIP8

PACKAGE

DESCRIPTION

plastic small outline package; 8 leads; body width 3.9 mm

plastic dual in-line package; 8 leads (300 mil)

VERSION

SOT96-1

SOT97-1

1998 Feb 23

2

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