Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VUVP

Undervoltage protection threshold

-

-

-

8

V

RdsON

Power transistor on-resistance

High side

-

0.2

-

Ω

Low side

-

0.2

-

Po

Output power

THD = 10%

-

100

-

W

THD = 1%

-

78

-

Po

Output power

RL = 8 Ω, THD = 10%

-

80

-

W

PD

Dissipated power

Po = 100 W + 100 W,

THD = 10%

-

20

-

W

η

Efficiency

Po = 100 W + 100 W

-

90

-

%

THD

Total harmonic distortion

Po = 1 W

-

0.1

-

%

GV

Closed-loop gain

GAIN0 = L, GAIN1 = L

24.6

25.6

26.6

dB

GAIN0 = L, GAIN1 = H

30.6

31.6

32.6

GAIN0 = H, GAIN1 = L

34.1

35.1

36.1

GAIN0 = H, GAIN1 = H

36.6

37.6

38.6

ΔGV

Gain matching

-

-1

-

1

dB

CT

Crosstalk

f = 1 kHz, Po = 1 W

50

70

-

dB

eN

Total input noise

A Curve, GV = 20 dB

-

15

-

µV

f = 22 Hz to 22 kHz

-

25

50

SVRR

Supply voltage rejection ratio

fr = 100 Hz, Vr = 0.5 Vpp, CSVR

= 10 µF

-

70

-

dB

Tr, Tf

Rise and fall times

-

-

50

-

ns

fSW

Switching frequency

Internal oscillator

290

310

330

kHz

fSWR

Output switching frequency range

With internal oscillator (1)

250

-

400

kHz

With external oscillator (2)

250

-

400

VinH

Digital input high (H)

-

2.3

-

-

V

VinL

Digital input low (L)

-

-

0.8

VSTBY

Pin STBY voltage high (H)

-

2.7

-

-

V

Pin STBY voltage low (L)

-

-

0.5

VMUTE

Pin MUTE voltage high (H)

-

2.5

-

-

V

Pin MUTE voltage low (L)

-

-

0.8

AMUTE

Mute attenuation

VMUTE = L, VSTBY = H

-

70

-

dB

1. fSW = 106 / ((16 * ROSC + 182) * 4) kHz, fSYNCLK = 2 * fSW with R3 = 39 kΩ (see Figure 19. Application circuit for 6 Ω or 8 Ω

speakers).

2. fSW = fSYNCLK / 2 with the external oscillator.

TDA7498

Electrical specifications

DS6437 - Rev 10

page 6/22