tda7268, Ham- CB Radio, Karty katalogowe
[ Pobierz całość w formacie PDF ]
TDA7268
2 x 2W STEREO AUDIO AMPLIFIER
WIDE OPERATING RANGE FROM 4.5V TO 18V
P
OUT
= 2W @ THD 10% 12V/8
W
INTERNAL FIXED GAIN 32dB
NO FEEDBACK CAPACITOR
NO BOUCHEROT CELL
THERMAL PROTECTION
AC SHORT CIRCUIT PROTECTION
SVR CAPACITOR FOR BETTER RIPPLE
REJECTION
LOW TURN-ON/OFF POP
VERY FEW EXTERNAL COMPONENTS
STAND-BY MODE (I
ST-BY
< 300
POWERDIP (8+8)
ORDERING NUMBER:
TDA7268
m
A)
DESCRIPTION
The device TDA7268 is a new technology stereo
Audio Amplifier in DIP package specially de-
signed for TV application.
Thanks to the fully complementary output configu-
ration the device delivers a rail to rail voltage
swing without need of boostrap capacitor.
BLOCK DIAGRAM
1
V
S1
4
IN1
+
-
2
OUT1
8
V
S2
5
+
-
IN2
7
OUT2
SVR
3
6
9
÷
16
S-GND
P-GND
D94AU167B
September 1997
1/5
TDA7268
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
18
V
I
O
Output Peak Current
1.5
A
T
op
Operating Temperature Range
0 to 70
°
C
T
j
Junction Temperature
150
°
C
T
stg
Storage Temperature Range
-40 to 125
°
C
PIN CONNECTION
V
S1
OUT1
SVR
IN1
IN2
1
16
15
14
13
12
PGND
2
PGND
3
PGND
4
5
6
7
PGND
PGND
S-GND
11
PGND
OUT2
10
PGND
V
S2
8
9
PGND
D94AU164A
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-amb
Thermal Resistance Junction to ambient (on PCB)
Max.
70
°
C/W
R
th j-case
Thermal Resistance Junction to case
Max.
15
°
C/W
ELECTRICAL CHARACTERISTICS
(T
amb
=25
°
C; V
S
=12V;R
L
=8
W
; f = 1KHz; unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
4.5
18
V
I
S
Quiescent Current
40
60
mA
I
sb
Stand-By Current
Pin 3 shorted to GND
0.15
0.3
mA
V
O
Quiescent Output Voltage
5.5
6
6.5
V
A
V
Voltage Gain
31
32
33
dB
D
A
V
Voltage Gain Matching
1.0
dB
R
IN
Input Impedance
50
100
K
W
P
O
Output Power
THD = 10%
1.9
2
W
THD
Distortion
P
O
= 1W
0.1
0.4
%
SVR
Supply Voltage Rejection
V
rip.
= 150mVrms; F
rip.
= 1KHz
R
S
= 10k
W
50
46
dB
dB
R
S
=50
W
40
e
n
Total Input Noise Voltage
Rg = 10K
W
; BW = 20Hz to
4
8
m
V
20KHz
CT
Cross Talk
P
O
= 1W;
50
60
dB
V
sb
Stand-By Enable Voltage
I
SB
< 300
m
A
1
V
A
sb
Stand-By Attenution
60
80
dB
P
O
Output Power
THD = 10%; V
S
= 9V; R
L
=4
W
1.8
W
2/5
TDA7268
Fig. 1:
Standard Test and Application Circuit
1
V
S1
V
S
=12V
C1 0.1
m
F
4
C4
100
m
F
IN1
+
-
2
OUT1
R1
10K
C5
470
m
F
8
W
8
V
S2
C2 0.1
m
F
IN2
5
C6 470
m
F
+
-
IN2
7
OUT2
R2
10K
SVR
3
8
W
S1
STAND-BY
C3
47
m
F
6
9
÷
16
S-GND
P-GND
D94AU168D
Note: Add R1 & R2 on demoboard only for DC tests.
Fig. 2:
PCB And Components Layout Of The Application Circuit of Figure 1
APPLICATION HINTS:
For 12V supply and 8
W
speaker application, its
maximum power dissipation is about 2W.
Assumming that max ambient temperature is
70
°
C. Required thermal resistance of the device
and heat dissipating means must be equal to (150
C/W.
Junction to pin thermal resistance of the package
is about 15
°
C/W.
That means external heat sink of about 25
°
C/W is
required. Stand-By switches must be able to dis-
charge C
svr
current.
°
3/5
IN1
- 70)/2 = 40
TDA7268
DIP16 PACKAGE MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
a1
0.51
0.020
B
0.77
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
3.3
0.130
Z
1.27
0.050
4/5
TDA7268
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as criticalcomponents in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
{
5/5
1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
[ Pobierz całość w formacie PDF ]