SGS Thomson Microelectronics TDA7296AV, TDA7296A Datasheet
TDA7296A
70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
PRODUCT PREVIEW
VERY HIGH OPERATING VOLTAGE RANGE
(±35V)
DMOSPOWERSTAGE
HIGH OUTPUT POWER (UP TO 60W MUSIC
POWER)
MUTING/STAND-BYFUNCTIONS
NO SWITCH ON/OFFNOISE
NO BOUCHEROTCELLS
VERYLOW DISTORTION
VERYLOW NOISE
SHORTCIRCUITPROTECTION
THERMALSHUTDOWN
CLIPPINGDETECTION OUTPUT
DESCRIPTION
The TDA7296A 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). Thanks to the wide voltage range and
to the high out current capability it is able to supply the highest power into both 4Ω and 8Ω loads
Figure 1: Typical Applicationand Test Circuit
MULTIPOWER BCD TECHNOLOGY
Multiwatt 15
ORDERING NUMBER: TDA7296AV
even in presence of poor supply regulation, with
high Supply Voltage Rejection.
The built in muting function with turn on delay
simplifiesthe remote operation avoidingswitching
on-off noises.
The device provides a circuit for the detection of
clipping in the output stages. The output, on open
collector, is able to drive system with automatic
levelcontrol.
+VsC7 100nF C6 1000µF
R3 22K
+PWVs+Vs
CD
S/C
PROTECTION
158
-Vs
VM
VSTBY
C2
R2
22µF
680Ω
C1 470nF
R1 22K
R5 10K
R4 22K
C3 10µFC410µF
IN- 2
IN+
IN+MUTE
MUTE
STBY
3
4
10
9
MUTE
STBY
1
STBY-GND
713
-
+
THERMAL
SHUTDOWN
-Vs -PWVs
C9 100nF C8 1000µF
June 1996
This is preliminaryinformationon a new productnow in development. Details aresubject to change withoutnotice.
14
6
5
D96AU494
OUT
C5
22µF
BOOTSTRAP
+5V
1/13
TDA7296A
PIN CONNECTION (Topview)
BLOCK DIAGRAM
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BOOTSTRAP
D96AU495
-V
(POWER)
S
OUT
+V
(POWER)
S
N.C.
N.C.
MUTE
STAND-BY
(SIGNAL)
-V
S
+V
(SIGNAL)
S
BOOTSTRAP
CD
SVR
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND
+
-
+
+V
S
BOOTSTRAP
IN+
OUTPUT
IN-
BIPOLAR
TRANSCONDUCTANCE
INPUT STAGE
MOS GAIN &
LEVEL SHIFTING
STAGE
MOS OUTPUT STAGE SHORT CIRCUIT
CD
+
-
+
PROTECTION
CD
-V
D96AU496
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
I
O
P
tot
T
op
T
stg,Tj
Supply Voltage
S
Output Peak Current 5 A
Power Dissipation T
=70°C50W
case
Operating Ambient Temperature Range 0 to 70
Storage and Junction Temperature 150
2/13
35 V
±
S
C
°
C
°
TDA7296A
THERMAL DATA
Symbol Description Value Unit
R
th j-case
Thermal Resistance Junction-case Max 1.5
C/W
°
ELECTRICALCHARACTERISTICS
R
=50Ω;T
g
=25°C,f = 1 kHz; unlessotherwisespecified.
amb
(Refer to the Test Circuit V
= ±24V, RL=8Ω,GV= 30dB;
S
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
I
I
V
I
OS
P
Operating Supply Range ±10 ±35 V
S
Quiescent Current 20 30 60 mA
q
Input Bias Current 500 nA
b
Input Offset Voltage +10 mV
OS
Input Offset Current +100 nA
RMS Continuous Output Power d = 0.5%:
O
Music Power (RMS) (*)
t=1s
∆
d Total Harmonic Distortion (**) P
V
=±24V,RL=8
S
V
=±21V, RL=6Ω
S
ς
=±18V, RL=4Ω
S
Ω
d = 10%;
R
=8Ω ;VS=±29V
L
R
=6Ω ;VS=±24V
L
R
=4Ω;VS=±22V
L
= 5W; f = 1kHz
O
P
=0.1to 20W; f= 20Hzto20kHz
O
=±18V, RL=4
V
S
P
= 5W; f = 1kHz
O
P
=0.1to 20W; f= 20Hzto20kHz
O
Ω:
27
27
27
30
30
30
60
60
60
0.005
0.01
0.1
0.1
W
W
W
W
W
W
%
%
%
%
SR Slew Rate 7 10 V/µs
G
G
e
f
L,fH
R
SVR Supply Voltage Rejection f = 100Hz; V
T
STAND-BY FUNCTION (Ref: -V
V
ST on
V
ST off
ATT
I
q st-by
MUTE FUNCTION (Ref: -V
V
Mon
V
Moff
ATT
DC Off Clipping detector OFF.
Open Loop Voltage Gain 80 dB
V
Closed Loop Voltage Gain 24 30 40 dB
V
Total Input Noise A = curve
N
f = 20Hz to 20kHz
1
25
Frequency Response (-3dB) PO= 1W 20Hz to 20kHz
Input Resistance 100 kΩ
i
= 0.5Vrms 60 75 dB
ripple
Thermal Shutdown 145
S
or GND)
S
Stand-by on Threshold 1.5 V
Stand-by off Threshold 3.5 V
Stand-by Attenuation 70 90 dB
st-by
Quiescent Current @ Stand-by 1 3 mA
or GND)
S
Mute on Threshold 1.5 V
Mute off Threshold 3.5 V
Mute AttenuatIon 60 80 dB
mute
THD = 1% TBD %
µV
V
µ
C
°
CD output Duty Cycle
DC On Clipping detector On.
THD = 10% TBD %
CD output Duty Cycle
Note (*):
MUSIC POWERis the maximalpower which the amplifieris capableof producing across therated load resistance (regardless ofnon linearity)
1 sec after the applicationofasinusoidalinput signal of frequency 1KHz.
Note (**): Tested with optimized ApplicationBoard (see fig. 2)
3/13
TDA7296A
Figure 2:
P.C.B.and componentslayout of thecircuit of figure 1. (1:1 scale)
TDA7296A
Note:
The Stand-by and Mute functions canbe referred eitherto GND or -VS.
On the P.C.B. is possibletosetboth the configuration throughthe jumperJ1.
4/13
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