SGS Thomson Microelectronics TDA7496L Datasheet
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
2W+2W OUTPUT POWER
R
= 8Ω @THD = 10% VCC = 14V
L
ST-BY AND MUTE FUNCTIONS
LOW TURN-ON TURN-OFF POP NOIS E
LINEAR VOLUME CONTROL DC COUPLED
WITH POWER OP. AMP.
NO BOUCHEROT CELL
NO ST-BY RC INPUT NETWORK
SINGLE SUPPLY RANGING UP TO 15V
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
INTERNALLY FIXED GAIN
SOFT CLIPPING
VARIABLE OUTPUT AFTER VOLUME CON-
TROL CIRCUIT
POWERDIP (14+3+3) PACKAGE
DESCRIPTION
The TDA7496L is a stereo 2W+2W class AB
power amplifier assembled in the @ Powerdip
TDA7496L
Powerdip (14+3+3)
ORDERING NUMBER:
14+3+3 package, specially designed for high
quality sound, TV and Monitor applications.
Features of the TDA7496L include linear volume
control, Stand-by and mute functions.
TDA7496L
BLOCK DIAGRAM
GND
INR
470nF
INL
470nF
SVR 10
470µF
1,2,3,13,
18,19,20
9
4
30K
VOLUME
100nF
VAROUT_R
VOLUME
VOLUME
65
VAROUT_L
300K
V
S
7
15,16
+
OP AMP
MUTE/STBY
PROTECTIONS
+
-30K
OP AMP
+5V
60K
14
OUTR
11
STBY
12
MUTE
17
OUTL
D97AU596A
1000µF
1000µF
1µF
10K
S1 ST-BY
S2 MUTE
+5V
S_GND
+5V
April 1998
1/10
TDA7496L
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
V
IN
P
tot
T
amb
T
, T
stg
V
6
DC Supply Voltage 26 V
Maximum Input Voltage 8 Vpp
Total Power Dissipation (T
= 60°C) 6 W
case
Ambient Operating Temperature 0 to 70 °C
Storage and Junction Temperature -40 to 150 °C
j
Volume CTRL DC voltage 7 V
PIN CONNECTION
Rth with "on board" Square Heatsink vs. copper area.
R
GND
GND
GND
INL
VAROUT_L
VOLUME
VAROUT_R
N.C.
INR
1
2
3
4
5
6
7
8
9 MUTE
19
18
17
16
15
14
13
12
GND20
GND
GND
OUTL
V
S
V
S
OUTR
GND
thj-a
(˚C/W)
60
50
40
COPPER AREA 35µ
THICKNESS
D97AU675
PC BOARD
SVR 10 STBY11
D97AU597A
30
0 4 8 12 Area(cm2)
THERMAL DATA
Symbol Parameter Value Unit
R
th j-pins
(*) Thermal Resistance Junction-ambient max. 50 °C/W
R
th j-amb
(*) Mounted on PCB with no heatsink
Thermal Resistance Junction-pins max. 15 °C/W
ELECTRICAL CHARACTERISTICS
(Refer to the te s t ci r cui t V
= 14V; RL = 8Ω, Rg = 50Ω, T
S
= 25°C).
amb
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
DCV
S
I
q
Supply Voltage Range 10 18 V
Total Quiescent Current 25 50 mA
Output DC Offset Referred to
OS
No Input Signal 200 mV
SVR Potenial
V
O
P
O
THD Total Harmonic Distortion G
I
peak
V
in
G
V
G
vLine
A
Min VOL
Quiescent Output Voltage 7 V
Output Power THD = 10%; RL = 8Ω; 1.6 2 W
THD = 1%; R
= 30dB; PO = 1W; f = 1KHz; 0.4 %
V
= 8Ω; 1.3 W
L
Output Peak Current (internally limited) 0.7 0.9 A
Input Signal 2.8 Vrms
Closed Loop Gain Vol Ctrl > 4.5V 28.5 30 31.5 dB
Monitor Out Gain Vol Ctrl > 4.5V; Zload > 30KΩ -1.5 0 1.5 dB
Attenuation at Minimum Volume Vol Ctrl < 0.5V 80 dB
BW 0.6 MHz
2/10
TDA7496L
ELECTRICAL CHARACTERISTICS
(continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
e
N
Total Output Noise f = 20Hz to 22KHz
500 800 µV
Play, max volume
f = 20Hz to 22KHz
100 250 µV
Play, max attenuation
f = 20Hz to 22KHz
60 150 µV
Mute
SR Slew Rate 5 8 V/µs
R
R
Var Out
R
load Var Out
SVR Supply Voltage Rejection f = 1kHz; max volume
T
M
T
s
Input Resistance 22.5 30 KΩ
i
Variable Output Resistance 30 100 Ω
Variable Output Load 2 KΩ
35 39 dB
C
= 470µF; V
SVR
f = 1kHz; max attenuation
C
= 470µF; V
SVR
RIP
RIP
= 1V
=1V
rms
55 65 dB
rms
Thermal Muting 150 °C
Thermal Shut-down 160 °C
MUTE STAND-BY & INPUT SELECTION FUNCTION S
V
ST ON
V
ST OFF
V
M ON
V
M OFF
I
qST-BY
A
MUTE
I
stbyBIAS
muteBIAS
I
Stand-by ON Threshold 3.5 V
Stand-by OFF Threshold 1.5 V
Mute ON Threshold 3.5 V
Mute OFF Threshold 1.5 V
Quiescent Current @ Stand-by 0.6 1 mA
Mute Attenuation 50 65 dB
Stand-by bias current Stand by on V
V
ST-BY
MUTE
= 5V
= 5V
80 µA
Play or Mute -20 -5 µA
Mute bias current Mute 1 5 µA
Play 0.2 2 µA
µA
APPLICATION SUGGES TION S
The recommended values of the external components are those shown on the application circuit of figure 1A. Different values can be used, the following table can help the designer.
COMPONENT
SUGGESTION
VALUE
R1 300K Volume control
circuit
PURPOSE
LARGER THAN
SUGGESTION
Larger volume regulation
time
R2 10K Mute time constant Larger mute on/off time Smaller mute on/off time
P1 50K Volume control
circuit
C1 1000µF Supply voltage
bypass
C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C4 470µF Ripple rejection Better SVR Worse SVR
C5 100nF Volume control time
costant
C6 1000µF Output DC
Larger volume regulation
time
Lower low frequency cutoff Higher low frequency cutoff
decoupling
C7 1µF Mute time costant Larger mute on/off time Smaller mute on/off time
C8 1000µF Output DC
Lower low frequency cutoff Higher low frequency cutoff
decoupling
C9 100nF Supply voltage
bypass
SMALLER THAN
SUGGESTION
Smaller volume regulation
time
Danger of oscillation
Smaller volume regulation
time
Danger of oscillation
3/10
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