3.4

Electrical characteristics

Unless otherwise stated, the values in the table below are specified for the conditions: VCC = 32 V, RL = 6 Ω,

ROSC = R3 = 39 kΩ, C8 = 100 nF, f = 1 kHz, GV = 25.6 dB Tamb = 25 °C.

Table 5. Electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Iq

Total quiescent current

No LC filter, no load

-

40

60

mA

IqSTBY

Quiescent current in standby

-

-

1

10

µA

VOS

Output offset voltage

Play mode

-100

-

100

mV

Mute mode

-60

-

60

IOCP

Overcurrent protection threshold

RL = 0 Ω

5.0

6.0

-

A

TjS

Junction temperature at thermal shutdown -

-

150

-

°C

Ri

Input resistance

Differential input

48

60

-

kΩ

VOVP

Overvoltage protection threshold

-

42

43

-

V

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%

-

80

-

W

THD = 1%

-

65

-

Po

Output power

RL = 8 Ω, THD = 10%, VCC = 32 V

-

65

-

W

PD

Dissipated power

Po = 80 W + 80 W, THD = 10%

-

16

-

W

η

Efficiency

Po = 80 W + 80 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

TDA7498L

Electrical characteristics

DS6539 - Rev 6

page 6/23