TDA7490L 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

TDA7490L

20W + 20W STEREO CLASS-D AMPLIFIER 40W MONO IN BTL

STMicroelectronics 

TDA7490L

20W + 20W STEREO CLASS-D AMPLIFIER

40W MONO IN BTL

1 FEATURES

Figure 1. Package

■ 20W + 20W OUTPUT POWER:

@RL = 8Ω/4Ω; THD = 10%

■ HIGH EFFICIENCY

■ WIDE SUPPLY VOLTAGE RANGE (FROM ±10

Flexiwatt 25

TO ±25V)

■ SPLIT SUPPLY, SINGLE SUPPLY

Table 1. Order Codes

OPERATION

Part Number

Package

■ TURN OFF/ON POP FREE

) ■ ST-BY AND MUTE FEATURES

t(s ■ SHORT CIRCUIT PROTECTION ACROSS

c THE LOAD

u ■ THERMAL OVERLOAD PROTECTION

rod ■ EXTERNALLY SINCHRONIZABLE

P ■ BRIDGE CONFIGURATION

TDA7490L

Flexiwatt 25

2 DESCRIPTION

The TDA7490L is a dual audio class D amplifier

assembled in Flexiwatt 25 package; it is specially

designed for high efficiency application mainly for

TV and Home Stereo sets.

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

so R1 10K

Ob MUTE

STBY

) - R3

t(s 10K

R2

30K

C27

2.2µF

duc INPUT1

C1 330nF

C2

1nF

ro C3

P 100nF

C4

te 100nF

R1 10K

le-VCC

so -VCC

Ob INPUT2

C7 100nF

R 6.8

C5 330nF

R17 52.3K

C26 470pF C25 470pF

R21 4.7K

+VCC

-VCC

+VCC

R20

68K

6

7

10

G=2.5

PREAMPLIFIER1

INTEGRATOR1

12

13

16

1

25

PREAMPLIFIER2

G=2.5

INTEGRATOR2

R4

130K

9

14

PWM-stage1

PWM-stage2

C23

2200µF

C22

100nF

C21

2200µF

2

OSC

4

5

3

11

8

15

C20

33nF

C18 330pF

R14 22K

C17

24pF

C16 330pF

23

R12 22K

C14

-VCC

R15

100

C19

560pF

L1 30µ

R13

10K

L2 30µ

C15

OUT1

C10

220nF

EXT_CK

OUT2

C29

18

C6

21

33nF

560pF

220nF

1nF

19

17

20

24

22

R11

100

R5 4.7K

C8 470pF

-VCC

R6 C9 470pF

68K

C28

2200µF

C11

100nF

C12

2200µF

-VCC

+VCC

R9 52.3K

D98AU978A

December 2005

Rev. 2

1/11

Share Link: