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TDA7490

December 2005

1FEATURES

Ω/4Ω; THD = 10%

TO ±25V)

THE LOAD

2DESCRIPTION

The TDA7490 is a dual audio class D amplifier as-

sembled in Flexiwatt 25 package; it is specially de-

signed for high efficiency application mainly for TV

and Home Stereo sets.

25W + 25W STEREO CLASS-D AMPLIFIER

50W MONO IN BTL

Figure 2. Test and Application Circuit. (Stereo Configuration)

PWM-stage1

G=2.5

PREAMPLIFIER1

INTEGRATOR1

R21 4.7K

C26 470pF C25 470pF

R20

68K

R17 52.3K

C23

2200

µF

C22

100nF

C21

2200

µF

R4

130K

L1 30

µ

INPUT1

OSC

C19

560pF

C20

33nF

C18 330pF

C17

24pF

C16 330pF

R15

100

R14 22K

R12 22K

C10

220nF

OUT1

PWM-stage2

L2 30

µ

OUT2

C29

220nF

R13

10K

C15

560pF

R11

100

EXT_CK

G=2.5

PREAMPLIFIER2

C8 470pF

C9 470pF

R6

68K

R5 4.7K

C14

33nF

R9 52.3K

C28

2200

µF

C12

2200

µF

C11

100nF

C1 330nF

C2

1nF

STBY

MUTE

R2

30K

C27

2.2

µF

R1 10K

C3

100nF

C4

100nF

INPUT2

C5 330nF

C6

1nF

D98AU978A

79

14

2

4

6

10

12

13

16

1

25

18

19

17

20

24

22

21

23

15

8

11

3

5

INTEGRATOR2

R3

10K

C7 100nF

R1 10K

R 6.8

Rev. 6

Figure 1. Package

Table 1. Order Codes

Part Number

Package

TDA7490

Flexiwatt 25

Flexiwatt 25