1998 Dec 01

2

Philips Semiconductors

Preliminary specification

2

× 50 W class-D power amplifier

TDA8920

FEATURES

• High efficiency (90%)

• Operating voltage from ±15Vto ±30 V

• Very low quiescent current

• Low distortion

• Fixed gain of 30 dB

• High output power

• Output power limiter

• Good ripple rejection

• Usable as a mono amplifier in Bridge-Tied Load (BTL) or

as a stereo Single-Ended (SE) amplifier

• Tracking possibility for oscillator frequency

• Differential audio inputs

• No switch-on or switch-off plops

• Short-circuit proof across the load

• Electrostatic discharge protection on all pins

• Thermally protected.

APPLICATIONS

• Television sets

• Home-sound systems

• Multimedia systems.

GENERAL DESCRIPTION

The TDA8920 is a high efficiency class-D audio power

amplifier. It can be used in a mono Bridge-Tied Load (BTL)

or in a stereo Single-Ended (SE) configuration. The device

operates over a wide supply voltage range from

±15Vupto ±30 V and consumes a very low quiescent

current.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

General

operating supply voltage

±15

±25

±30

V

total quiescent current

−

50

60

mA

η

efficiency

85

90

−

%

Stereo single-ended configuration

output power

THD = 10%

tbf

35

−

W

closed loop voltage gain

29

30

31

dB

Z

input impedance

80

120

−

k

Ω

noise output voltage

−

100

−µV

SVRR

supply voltage ripple rejection

60

−−

dB

α

cs

channel separation

50

tbf

−

dB

Mono bridge-tied load configuration

output power

THD = 10%

−

130

−

W

closed loop voltage gain

35

36

37

dB

input impedance

40

60

−

k

Ω

noise output voltage

−

140

−µV

SVRR

supply voltage ripple rejection

66

−−

dB

∆V

DC output offset voltage

−−

50

mV