TDA7296
70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
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FEATURES
MULTIPOWER BCD TECHNOLOGY
VERY HIGH OPERATING VOLTAGE RANGE
(±35V)
DMOS POWER STAGE
HIGH OUTPUT POWER (UP TO 60W MUSIC
POWER)
MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
NO BOUCHEROT CELLS
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
Figure 1. Package
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Multiwatt15V
Multiwatt15H
(Short Leads)
Table 1. Order Codes
Part Number
TDA7296
TDA7296HS
Package
Multiwatt15V
Multiwatt15H (Short Leads)
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2
DESCRIPTION
Thanks to the wide voltage range and to the high
out current capability it is able to supply the high-
est power into both 4Ω and 8Ω loads even in pres-
ence of poor supply regulation, with high Supply
Voltage Rejection.
The built in muting function with turn on delay sim-
plifies the remote operation avoiding switching on-
off noises.
The TDA7296 is a monolithic integrated circuit in
Multiwatt15 package, intended for use as audio
class AB amplifier in Hi-Fi field applications (Home
Stereo, self powered loudspeakers, Topclass TV).
Figure 2. Typical Application and Test Circuit
C7 100nF
R3 22K
C2
22µF
+Vs
C6 1000µF
+Vs
R2
680Ω
C1 470nF
IN-
2
7
-
+PWVs
13
14
OUT
C5
22µF
6
BOOT-
STRAP
R6
2.7Ω
C10
100nF
IN+
3
+
R1 22K
IN+MUTE
R5 10K
MUTE
STBY
R4 22K
C3 10µF
C4 10µF
4
10
9
VM
VSTBY
MUTE
STBY
1
STBY-GND
8
THERMAL
SHUTDOWN
S/C
PROTECTION
15
-PWVs
C8 1000µF
D93AU011
-Vs
C9 100nF
-Vs
Note: The Boucherot cell R6, C10, normally not necessary for a stable operation it could
be needed in presence of particular load impedances at V
S
<±25V.
February 2005
Rev. 10
1/15
TDA7296
Figure 3. Pin Connection
Table 2. Absolute Maximum Ratings
Symbol
V
S
I
O
P
tot
T
op
T
stg
, T
j
Supply Voltage (No Signal)
Output Peak Current
Power Dissipation T
case
= 70°C
Operating Ambient Temperature Range
Storage and Junction Temperature
Parameter
Value
±35
5
50
0 to 70
150
Unit
V
A
W
°C
°C
Table 3. Thermal Data
Symbol
R
th j-case
Parameter
Thermal Resistance Junction-case
Typ.
1
Max
1.5
Unit
°C/W
Figure 4. Block Diagram
2/15
TDA7296
Table 4. Electrical Characteristcs
(Refer to the Test Circuit V
S
= ±24V, R
L
= 8Ω, G
V
= 30dB; R
g
= 50Ω;
T
amb
= 25°C, f = 1 kHz; unless otherwise specified).
Symbol
V
S
I
q
I
b
Parameter
Supply Range
Quiescent Current
Input Bias Current
Input Offset Voltage
Input Offset Current
RMS Continuous Output
Power
Test Condition
Min.
±10
20
Typ.
30
Max.
±35
65
500
Unit
V
mA
nA
mV
nA
W
W
W
W
W
W
%
V
OS
I
OS
P
O
-10
-100
d = 05%
V
S
= ± 24V, R
L
= 8Ω;
V
S
= ± 21V, R
L
= 6Ω;
V
S
= ± 18V, R
L
= 4Ω;
d = 10%
V
S
= ± 29V, R
L
= 8Ω;
V
S
= ± 24V, R
L
= 6Ω;
V
S
= ± 22V, R
L
= 4Ω;
P
O
= 5W; f = 1kHz
P
O
= 0.1 to 20W; f = 20Hz to 20kHz
V
S
= ± 18V, R
L
= 4Ω;
P
O
= 5W; f = 1kHz
P
O
= 0.1 to 20W; f = 20Hz to 20kHz
27
27
27
30
30
30
60
60
60
0.005
10
100
Music Power (RMS)
∆t
= 1s (*)
d
Total Harmonic Distortion (**)
0.1
0.01
0.1
7
24
10
80
30
1
2
100
5
20Hz to 20kHz
kΩ
75
145
1.5
3.5
70
90
1
3
1.5
3.5
60
80
dB
°C
V
V
dB
mA
V
V
dB
40
%
%
V/µs
dB
dB
µV
µV
SR
G
V
G
V
e
N
f
L ,
f
H
R
i
SVR
T
S
V
ST on
V
ST off
ATT
st-by
I
q st-by
V
Mon
V
Moff
ATT
mute
Slew Rate
Open Loop Voltage Gain
Closed Loop Voltage Gain (1)
Total Input Noise
frequency response (-3dB)
Input Resistance
Supply Voltage Rejection
Thermal Shutdown
Stand-by on Threshold
Stand-by off Threshold
Stand-by Attenuation
Quiescent Current @ Stand-by
Mute on Threshold
Mute off Threshold
Mute AttenuatIon
f = 100Hz; V
ripple
= 0.5Vrms
A = curve
f = 20Hz to 20kHz
P
O
=1W
60
STAND-BY FUNCTION
(Ref: -Vs or GND)
MUTE FUNCTION
(Ref: -Vs ro GND)
Note (*):
MUSIC POWER is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity)
1 sec after the application of a sinusoidal input signal of frequency 1KHz.
Note (**): Tested with optimized Application Board (see fig.5)
3/15
TDA7296
Figure 5. P.C.B. and Components Layout of the Circuit of figure 2.
Note:
The Stand-by and Mute functions can be referred either to GND or -VS.
On the P.C.B. is possible to set both the configuration through the jumper J1.
4/15
TDA7296
3
APPLICATION SUGGESTIONS
(see Test and Application Circuits of the Fig. 2)
The recommended values of the external components are those shown on the application circuit of Figure
2. Different values can be used; the following table can help the designer.
COMPONENTS
R1 (*)
R2
R3 (*)
R4
R5
C1
C2
C3
C4
C5
C6, C8
C7, C9
SUGGESTED
VALUE
22k
680Ω
22k
22k
10k
0.47µF
22µF
10µF
10µF
22µF
1000µF
0.1µF
St-by Time Constant
Mute Time Constant
Input DC Decoupling
Feedback DC
Decoupling
Mute Time Constant
St-by Time Constant
Bootstrapping
Supply Voltage Bypass
Supply Voltage Bypass
Larger Mute
ON/OFF Time
Larger St-by
ON/OFF Time
PURPOSE
Input Resistance
Closed Loop Gain
Set to 30db (**)
LARGER THAN
SUGGESTED
Increase Input
Impedance
Decrease of Gain
Increase of Gain
Larger St-by
ON/OFF Time
Larger Mute
ON/OFF Time
SMALLER THAN
SUGGESTED
Decrease Input
Impedance
Increase of Gain
Decrease of Gain
Smaller St-by ON/OFF
Time; Pop Noise
Smaller Mute
ON/OFF Time
Higher Low Frequency
Cutoff
Higher Low Frequency
Cutoff
Smaller Mute ON/OFF
Time
Smaller St-by ON/OFF
Time; Pop Noise
Signal Degradation at
Low Frequency
Danger of Oscillation
Danger of Oscillation
(*) R1 = R3 for pop optimization
(**) Closed Loop Gain has to be
≥
24dB
5/15
stm32/stm8
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