tda7495, Ham- CB Radio, Karty katalogowe
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TDA7495
11W+11W AMPLIFIER WITH DC VOLUME CONTROL
@THD = 10% V
CC
= 28V
ST-BY AND MUTE FUNCTIONS
LOW TURN-ON TURN-OFF POP NOISE
LINEAR VOLUME CONTROL DC COUPLED
WITH POWER OP. AMP.
NO BOUCHEROT CELL
NO ST-BY RC INPUT NETWORK
SINGLE SUPPLY RANGING UP TO 35V
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
INTERNALLY FIXED GAIN
SOFT CLIPPING
VARIABLE OUTPUT AFTER VOLUME CON-
TROL CIRCUIT
MULTIWATT 15 PACKAGE
W
MULTIPOWER BI50II TECHNOLOGY
Multiwatt15
ORDERING NUMBER:
TDA7495
power amplifier assembled in the @ Multiwatt 15
package, specially designed for high quality
sound, TV applications.
Features of the TDA7495 include linear volume
control, Stand-by and mute functions.
DESCRIPTION
The TDA7495 is a stereo 11+11W class AB
BLOCK AND APPLICATION DIAGRAM
VAROUT_R
V
S
PW_GND
2
13
PW_GND
11
15
VOLUME
1
1000
m
F
INR
+
-
14
470nF
30K
OUTR
OP AMP
S1 ST-BY
+5V
S_GND
9
STBY
8
S_GND
MUTE/STBY
PROTECTIONS
10K
10
MUTE
60K
1
m
F
+5V
VOLUME
S2 MUTE
INL
5
+
-
12
OUTL
470nF
30K
1000
m
F
OP AMP
SVR
7
3
4
470
m
F
VOLUME
VAROUT_L
+5V
100nF
300K
D96AU440B
February 1997
1/12
11+11W OUTPUT POWER
R
L
=8
TDA7495
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
DC Supply Voltage
35
V
V
IN
Maximum Input Voltage
8
Vpp
P
tot
Total Power Dissipation (Tamb = 70
°
C)
20
W
T
amb
Ambient Operating Temperature (1)
-20 to 85
C
T
stg
,T
j
Storage and Junction Temperature
-40 to 150
C
V
3
Volume CTRL DC voltage
7
V
(1) Operation between -20 to 85
°
C guaranteed by correlation with 0 to 70
°
C.
PIN CONNECTION
(Top view)
15
PW_GND
OUTR
V
S
OUTL
14
13
12
11
PW_GND
MUTE
STBY
S_GND
SVR
N.C.
INL
VAROUT_L
VOLUME
VAROUT_R
INR
10
9
8
7
6
5
4
3
2
1
D96AU441B
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Typ. = 2
Max. = 2.8
°
C/W
R
th j-amb
Thermal Resistance Junction-ambient
max
35
°
C/W
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit V
S
= 20V; R
L
=8
W
,R
g
=50
W
,T
amb
=25
°
C).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
11
35
V
I
q
Total Quiescent Current
70
100
mA
DCV
OS
Output DC Offset Referred to
SVR Potenial
No Input Signal
-650
650
mV
V
O
Quiescent Output Voltage
10
V
P
O
Output Power
THD = 10%; R
L
=8
W
;V
S
= 28V
9.5
11
W
THD = 1%; R
L
=8
W
;V
S
= 28V
7.5
8
W
THD = 10%; R
L
=4
W
;V
CC
= 20V
7
8
W
THD = 1%; R
L
=4
W
;V
CC
= 20V
5
6
W
THD = 10%; R
L
=8
W
;V
CC
= 18V
3.5
3.8
W
THD = 1%; R
L
=8
W
;V
CC
= 18V
2.6
2.9
W
2/12
°
°
TDA7495
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
THD
Total Harmonic Distortion
G
V
= 30dB; P
O
= 1W; f = 1KHz;
0.4
%
I
peak
Output Peak Current
(internally limited)
1.7
2.4
A
V
in
Input Signal
2.8
Vrms
G
V
Closed Loop Gain
Vol Ctrl > 4.5V
28.5
30
31.5
dB
G
vLine
Monitor Out Gain
Vol Ctrl > 4.5V; Zload > 30K
W
-1.5
0
1.5
dB
A
Min
V
OL
Attenuation at Minimum Volume Vol Ctrl < 0.5V
80
dB
BW
0.6
MHz
e
N
Total Output Noise
f = 20Hz to 22KHz
Play, max volume
500
800
m
V
f = 20Hz to 22KHz
Play, max attenuation
100
250
m
V
f = 20Hz to 22KHz
Mute
60
150
m
V
SR
Slew Rate
5
8
V/
m
s
R
i
Input Resistance
22.5
30
K
W
R
Var Out
Variable Output Resistance
30
100
W
R
load Var Out
Variable Output Load
2
K
W
SVR
Supply Voltage Rejection
f = 1kHz; max volume
C
SVR
= 470
m
F; V
RIP
=1V
rms
35
39
dB
f = 1kHz; max attenuation
C
SVR
= 470
55
65
dB
m
F; V
RIP
=1V
rms
T
M
Thermal Muting
150
°
C
T
s
Thermal Shut-down
160
°
C
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
V
ST-BY
Stand-by threshold
2.3
2.5
2.7
V
V
MUTE
Mute Threshold
2.3
2.5
2.7
V
I
qST-BY
Quiescent Current @ Stand-by
0.6
1
mA
A
MUTE
Mute Attenuation
50
65
dB
I
stbyBIAS
Stand-by bias current
Stand by on V
ST-BY
=5V
V
MUTE
=5V
80
m
A
m
A
Play or Mute
-20
-5
m
A
I
muteBIAS
Mute bias current
Mute
1
5
m
A
Play
0.2
2
m
A
3/12
TDA7495
Figure 1a:
Application Circuit.
+V
S
C1
1000
F
C9
0.1
F
VAROUT_R
V
S
2
13
PW_GND
PW_GND
11
15
VOLUME
1
C8 1000
m
PW_GND
INR
+
-
14
OUTR
C2 470nF
30K
OP AMP
S1 STBY
+5V
S_GND
9
8
MUTE/STBY
PROTECTIONS
10
R2 10K
S_GND
VOLUME
C7
1
+5V
m
F
S2 MUTE
5
INL
+
-
12
OUTL
C3 470nF
30K
C6 1000
m
PW_GND
OP AMP
SVR
7
3
4
C4 470
m
F
VOLUME
VAROUT_L
+5V
VOL
P1
50K
LOG
C5
100nF
R1 300K
D96AU493B
TP1
Figure 1b:
P.C.B. and Component Layout.
4/12
m
m
F
F
TDA7495
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig-
ure 1a. Different values can be used, the following table can help the designer.
COMPONENT
SUGGESTION
VALUE
PURPOSE
LARGER THAN
SUGGESTION
SMALLER THAN
SUGGESTION
R1
300K
Volume control circuit
Larger volume regulation
time
Smaller volume regulation
time
R2
10K
Mute time constant
Larger mute on/off time
Smaller mute on/off time
P1
50K
Volume control circuit
C1
1000
m
F
Supply voltage
bypass
Danger of oscillation
C2
470nF
Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C3
470nF
Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C4
470
m
F
Ripple rejection
Better SVR
Worse SVR
C5
100nF
Volume control time
costant
Larger volume regulation
time
Smaller volume regulation
time
C6
1000
m
F
Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C7
1
m
F
Mute time costant
Larger mute on/off time
Smaller mute on/off time
C8
1000
m
F
Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C9
100nF
Supply voltage
bypass
Danger of oscillation
TYPICAL CHARACTERISTICS:
Refer to the application circuit of fig.1A T
amb
=25
°
C; V
S
= 20V; R
L
=8
W
; F = 1KHz; R
S
=50
W
; unless
otherwise specified.
Figure 2:
Output Power vs Supply Voltage
Figure 3:
Distortion vs Output Power
P
OUT
(W)
16
D97AU559
d
(%)
D97AU560
14
V
S
=28V
R
L
=8
R
L
=8
W
W
12
1
10
d=10%
f=15KHz
8
6
d=1%
0.1
f=1KHz
4
2
0
11
15
19
23
27
31 V
S
(V)
0.01
0
2
4
6
8
P
OUT
(W)
5/12
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