TDA7496L(1998) Просмотр технического описания (PDF) - STMicroelectronics

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Компоненты Описание

производитель

TDA7496L
(Rev.:1998)

2W+2W AMPLIFIER WITH DC VOLUME CONTROL

STMicroelectronics 

TDA7496L

ELECTRICAL CHARACTERISTICS (continued)

Symbol

eN

Parameter

Total Output Noise

SR

Ri

RVar Out

Rload Var Out

SVR

Slew Rate

Input Resistance

Variable Output Resistance

Variable Output Load

Supply Voltage Rejection

TM

Thermal Muting

Ts

Thermal Shut-down

Test Condition

f = 20Hz to 22KHz

Play, max volume

f = 20Hz to 22KHz

Play, max attenuation

f = 20Hz to 22KHz

Mute

f = 1kHz; max volume

CSVR = 470µF; VRIP = 1Vrms

f = 1kHz; max attenuation

CSVR = 470µF; VRIP =1Vrms

MUTE STAND-BY & INPUT SELECTION FUNCTIONS

VST ON Stand-by ON Threshold

VST OFF Stand-by OFF Threshold

VM ON Mute ON Threshold

VM OFF Mute OFF Threshold

IqST-BY Quiescent Current @ Stand-by

AMUTE Mute Attenuation

IstbyBIAS Stand-by bias current

Stand by on VST-BY = 5V

VMUTE = 5V

Play or Mute

ImuteBIAS

Mute bias current

Mute

Play

Min.

5

22.5

2

35

55

Typ.

500

100

60

8

30

30

39

65

150

160

Max.

800

250

150

100

Unit

µV

µV

µV

V/µs

KΩ

Ω

KΩ

dB

dB

°C

°C

3.5

V

1.5

V

3.5

V

1.5

V

0.6

1

mA

50

65

dB

80

µA

µA

-20

-5

µA

1

5

µA

0.2

2

µA

APPLICATION SUGGESTIONS

The recommended values of the external components are those shown on the application circuit of fig-

ure 1A. Different values can be used, the following table can help the designer.

COMPONENT

R1

R2

P1

C1

C2

C3

C4

C5

C6

C7

C8

C9

SUGGESTION

VALUE

300K

10K

50K

1000µF

470nF

470nF

470µF

100nF

1000µF

1µF

1000µF

100nF

PURPOSE

Volume control

circuit

Mute time constant

Volume control

circuit

Supply voltage

bypass

Input DC decoupling

Input DC decoupling

Ripple rejection

Volume control time

costant

Output DC

decoupling

Mute time costant

Output DC

decoupling

Supply voltage

bypass

LARGER THAN

SUGGESTION

Larger volume regulation

time

Larger mute on/off time

Lower low frequency cutoff

Lower low frequency cutoff

Better SVR

Larger volume regulation

time

Lower low frequency cutoff

Larger mute on/off time

Lower low frequency cutoff

SMALLER THAN

SUGGESTION

Smaller volume regulation

time

Smaller mute on/off time

Danger of oscillation

Higher low frequency cutoff

Higher low frequency cutoff

Worse SVR

Smaller volume regulation

time

Higher low frequency cutoff

Smaller mute on/off time

Higher low frequency cutoff

Danger of oscillation

3/10

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