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PDF TDA7296A Data sheet ( Hoja de datos )
| Número de pieza | TDA7296A | |
| Descripción | 70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TDA7296A
70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
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
CLIPPING DETECTION 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, Top-
class TV). Thanks to the wide voltage range and
to the high out current capability it is able to sup-
ply the highest power into both 4Ω and 8Ω loads
Figure 1: Typical Application and Test Circuit
PRODUCT PREVIEW
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
simplifies the remote operation avoiding switching
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
level control.
VM
VSTBY
C7 100nF
+Vs C6 1000µF
R3 22K
C2
22µF
R2
680Ω
IN- 2
C1 470nF
IN+ 3
R1 22K
IN+MUTE
4
-
+
R5 10K
R4 22K
C3 10µF
MUTE 10
MUTE
STBY 9
STBY
1
C4 10µF
STBY-GND
+Vs +PWVs
7 13
14 OUT
THERMAL
SHUTDOWN
8
-Vs
CD
S/C
PROTECTION
15
-PWVs
C5
22µF
6
BOOTSTRAP
5
+5V
C9 100nF
-Vs
C8 1000µF
D96AU494
June 1996
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/13
1 page  
TDA7296A
APPLICATION SUGGESTIONS (see Test and Application Circuits of the Fig. 1)
The recommended values of the external components are those shown on the application circuit of Fig-
ure 1. Different values can be used; the following table can help the designer.
COMPONENTS SUGGESTED VALUE
PURPOSE
LARGER THAN
SUGGESTED
SMALLER THAN
SUGGESTED
R1 (*)
22k INPUT RESISTANCE INCREASE INPUT DECREASE INPUT
IMPRDANCE
IMPEDANCE
R2
R3 (*)
680Ω
22k
CLOSED LOOP GAIN DECREASE OF GAIN INCREASE OF GAIN
SET TO 30dB (**)
INCREASE OF GAIN DECREASE OF GAIN
R4
22k
ST-BY TIME
LARGER ST-BY
SMALLER ST-BY
CONSTANT
ON/OFF TIME
ON/OFF TIME;
POP NOISE
R5
10k
MUTE TIME
LARGER MUTE
SMALLER MUTE
CONSTANT
ON/OFF TIME
ON/OFF TIME
C1
0.47µF
INPUT DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C2
22µF
FEEDBACK DC
DECOUPLING
HIGHER LOW
FREQUENCY
CUTOFF
C3
10µF
MUTE TIME
LARGER MUTE
SMALLER MUTE
CONSTANT
ON/OFF TIME
ON/OFF TIME
C4
10µF
ST-BY TIME
LARGER ST-BY
SMALLER ST-BY
CONSTANT
ON/OFF TIME
ON/OFF TIME;
POP NOISE
C5
22µF
BOOTSTRAPPING
SIGNAL
DEGRADATION AT
LOW FREQUENCY
C6, C8
1000µF
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
C7, C9
0.1µF
SUPPLY VOLTAGE
BYPASS
DANGER OF
OSCILLATION
(*) R1 = R3 FOR POP OPTIMIZATION
(**) CLOSED LOOP GAIN HAS TO BE ≥ 24dB
5/13
5 Page 
Figure 20: Frequency Response of the Bridge
Application
TDA7296A
Figure 21: Distortion vs. Output Power
Figure 22: Distortion vs. Output Power
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TDA7296A.PDF ] | |
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