TDA7496 Datasheet, PDF (3/10 Pages) STMicroelectronics – 5W+5W AMPLIFIER WITH DC VOLUME CONTROL

TDA7496
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
GvLine
Monitor Out Gain
Vol Ctrl > 4.5V; Zload > 30KΩ
AMin VOL Attenuation at Minimum Volume Vol Ctrl < 0.5V
BW
eN
Total Output Noise
f = 20Hz to 22KHz
Play, max volume
f = 20Hz to 22KHz
Play, max attenuation
f = 20Hz to 22KHz
Mute
SR
Slew Rate
Ri
Input Resistance
RVar Out Variable Output Resistance
Rload Var Out Variable Output Load
SVR
Supply Voltage Rejection
f = 1kHz; max volume
CSVR = 470µF; VRIP = 1Vrms
f = 1kHz; max attenuation
C_SVR = 470µF; VRIP =1Vrms
T_M
Thermal Muting
Ts
Thermal Shut-down
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.
-1.5
80
5
22.5
2
35
55
Typ.
0
0.6
500
100
60
8
30
30
39
65
150
160
Max.
1.5
800
250
150
100
Unit
dB
dB
MHz
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
LARGER THAN
SUGGESTION
Volume control circuit
Larger volume regulation
time
Mute time constant Larger mute on/off time
Volume control circuit
Supply voltage
bypass
Input DC decoupling Lower low frequency cutoff
Input DC decoupling Lower low frequency cutoff
Ripple rejection
Better SVR
Volume control time Larger volume regulation
costant
time
Output DC decoupling Lower low frequency cutoff
Mute time costant Larger mute on/off time
Output DC decoupling Lower low frequency cutoff
Supply voltage
bypass
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
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