ST TDA7296 - User Manual

1/15
TDA7296
February 2005
1 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
2 DESCRIPTION
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).
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.
70V - 60W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
Figure 2. Typical Application and Test Circuit
IN- 2
R2
680Ω
C2
22µF
C1 470nF
IN+
R1 22K
R6
2.7Ω
C10
100nF
3
R3 22K
-
+
MUTE
STBY
4
VM
VSTBY
10
9
IN+MUTE
MUTE
STBY
R4 22K
THERMAL
SHUTDOWN
S/C
PROTECTION
R5 10K
C3 10µF C4 10µF
1
STBY-GND
C5
22µF
713
14
6
158
-Vs -PWVs
BOOT-
STRAP
OUT
+PWVs+Vs
C9 100nF C8 1000µF
-Vs
D93AU011
+VsC7 100nF C6 1000µF
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.
Rev. 10
Fi
gure 1.
P
ac
k
age
Table 1. Order Codes
Part Number Package
TDA7296 Multiwatt15V
TDA7296HS Multiwatt15H (Short Leads)
Multiwatt15V
Multiwatt15H
(Short Leads)

Summary

TDA7296 Application Suggestions

TDA7296 Typical Characteristics

TDA7296 Introduction and Details

Output Stage Functionality

Details the DMOS unity-gain output buffer for high power and low distortion.

Protection Circuitry

Explains protection circuits against short circuits and overloads using SOA and thermal sensing.

Stand-by and Mute Functions

Covers stand-by and mute functions and their optimized turn-on/off sequence.

TDA7296 Bridge Configuration

ST TDA7296 Specifications

General

Supply Voltage Range	±10V to ±40V
Total Harmonic Distortion (THD)	0.1%
THD+N	0.1%
Frequency Response	20 Hz to 20 kHz
Package	Multiwatt15
Type	Class AB Audio Amplifier
Protection Features	Thermal protection, short-circuit protection
Operating Temperature Range	-40 °C to +150 °C