tda7263, Ham- CB Radio, Karty katalogowe
[ Pobierz całość w formacie PDF ]
TDA7263
12 +12W STEREO AMPLIFIER WITH MUTING
WIDE SUPPLY VOLTAGE RANGE
HIGH OUTPUT POWER
12+12W @ V
S
=28V, R
L
=8
W
, THD=10%
MUTE FACILITY (POP FREE) WITH LOW
CONSUMPTION
AC SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7263 is class AB dual audio power am-
plifier assembled in the new Clipwatt package,
specially designed for high quality sound applica-
tion as HI-FI music centers and stereo TV sets.
Clipwatt11
ORDERING NUMBER:
TDA7263
TEST AND APPLICATION CIRCUIT
March 1995
1/8
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA7263
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
35
V
I
O
Output Peak Current (repetitive f >20Hz)
2.5
A
I
O
Output Peak Current (non repetitive, t = 100
m
s)
3.5
A
P
tot
Total Power Dissipation (T
case
=70
°
C)
25
W
T
op
Operating Temperature Range
0 to 70
C
T
stg,Tj
Storage & Junction Temperature
-40 to 150
°
C
PIN CONNECTION
(Top view)
BLOCK DIAGRAM
2/8
°
TDA7263
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-case
Thermal resistance junction to case
Max
3
°
C/W
ELECTRICAL CHARACTERISTICS
(Refer to the stereo test and application circuit, V
S
= 28V; R
L
=8
W;
G
v
= 30dB; f = 1KHz; T
amb
=25
°
C unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
10
32
V
V
O
Quiescent Output Voltage
13.5
V
I
q
Total Quiescent Current
70
95
mA
P
O
Output Power (RMS)
d = 10% Tamb = 85
°
C
d=1%
10
12
9.5
W
W
d
Total Harmonic Distortion
P
O
= 1W, f = 1kHz
f = 100Hz to 10KHz; P
O
= 0.1 to 8W
0.02
0.2
0.5
%
CT
Cross Talk
R
S
= 10K
W
; f = 1KHz
70
dB
R
S
= 10K
W
; f = 10KHz
60
dB
R
I
Input Resistance
100
200
K
W
f
L
Low Frequency Roll-off (-3dB)
40
Hz
f
H
High Frequency Roll-off (-3dB)
80
KHz
e
N
Total Input Noise Voltage
A Curve; R
S
= 10K
W
1.5
mV
f = 22Hz to 22KHz; R
S
= 10K
W
3
10
m
V
SVR
Supply Voltage Rejection
(each channel)
R
S
=10K
W
; f = 100Hz; Vr = 0.5V
45
60
dB
T
j
Thermal Shutdown Junction
Temperature
145
°
C
MUTE FUNCTION
VT
MUTE
Mute Threshold
1
1.6
V
VT
PLAY
Play Threshold
4.5
V
ATT
AM
Mute Attenuation
70
100
dB
I
qMUTE
Quiescent Current @ Mute
7
10
mA
TYPICAL CHARACTERISTICS
(referred to the typical Application Circuit, V
S
= 28V, R
L
=8
W
, unless
otherwise specified)
Figure 1:
Output Power vs. Supply Voltage
Figure 2:
Distortion vs. Output Power
3/8
TDA7263
Figure 3:
Quiescent Current vs. Supply Voltage
Figure 4:
Supply Voltage Rejection vs.
Frequency
Figure 5:
Crosstalk vs. Frequency
Figure 6:
Output Attenuation & Quiescent
Current vs. V
pin3
Figure 7:
Total Power Dissipation vs. Output
Power
Figure 8:
Maximum allowable Power dissipation
vs. Ambient Temperature
4/8
TDA7263
APPLICATION SUGGESTION
The recommended values of the components are those shown on the typical application circuit. Different
values can be used; the following table can help the designer.
Component
Recomm.
Value
Purpose
Larger Than
Smaller Than
R1 and R3
1.5K
W
Close loop gain setting (*)
Increase of gain
Decrease of gain
R2 and R4
47
W
Close loop gain setting (*)
Decrease of gain
Increase of gain
R5 and R6
4.7
W
Frequency stability
Danger of oscillations
C1 and C2
100nF
Input DC decoupling
Higher SVR
Higher low frequency cutoff
C3
47
m
F
- Ripple Rejection
- Mute time constant
Increase of the Switch-on
time
- Degradation of SVR
- Worse turn-off pop by muting
C4
100nF
Supply Voltage Bypass
Danger of oscillations
C5
1000
m
F
Supply Voltage Bypass
C6 and C7
47
m
F
Feedback input DC
decoupling
Increase of the Switch-on
time
Danger of Switch-on time
C8 and C9
0.1
m
F
Frequency stability
Danger of oscillations
C10 and C11
1000
m
F
Output DC decoupling
Higher low-frequency cut-off
(*) Closed loop gain must be higher than 26dB
Figure 9:
P.C. Board and Component Layout (1:1 scale)
Note:
Use either C1, C2 (Polyester) or C1(*), C2(*) (Electrolytic) but not both.
5/8
[ Pobierz całość w formacie PDF ]