TDA7482
25W MONO CLASS-D AMPLIFIER
1
■
FEATURES
25W OUTPUT POWER:
RL = 8Ω/4Ω; THD = 10%
HIGH EFFICIENCY
WIDE SUPPLY VOLTAGE RANGE (UP TO
±25V)
SPLIT SUPPLY
OVERVOLTAGEPROTECTION
ST-BY AND MUTE FEATURES
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
Figure 1. Package
■
■
Multiwatt15
Table 1. Order Codes
Part Number
TDA7482
Multiwatt15
■
■
■
■
■
2
DESCRIPTION
sembled in Multiwatt15 package specially de-
signed for high efficiency applications mainly for
TV and Home Stereo sets.
The TDA7482 is an audio class-D amplifier as-
Figure 2. Test and Application Circuit.
+5V
R1
10K
R2
10K
ST-BY
MUTE
C1
2.2
µF
R3
30K
b
O
so
te
le
IN1
C2 0.33µF
C4 4.7nF
ro
P
C3
1nF
ST-BY/
MUTE
IN1
uc
d
10
4
9
5
-VCC
(Pin 14,15)
N.C.
s)
t(
-
+
PRE
C5 100nF
so
b
-O
+VCC
C6
100nF
V
CC SIGN
11
P
te
le
C7
2200µF
od
r
s)
t(
uc
Package
V
CC POW
13
3
BOOT
C11
100nF
OUT
C12
560pF
R5
150Ω
L1 60µH
-
+
PWM
1
FEEDCAP
12
SGN-GND
2
6
FREQ
C8
270pF
R4 12KΩ
(R
F
)
C9
100nF
-VCC
C10
2200µF
8
-V
CC SIGN
14,15
-V
CC POW
VREG
C14
470nF
8Ω
7
C15
100nF
BOOTDIODE
D96AU538C
October 2004
Rev. 4
1/7
TDA7482
Table 2. Pin Description
N°
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Pin
OUT
BOOTDIODE
BOOT
NC
FEEDCAP
FREQ
SGN-GND
–V
CC
SIGN
IN
ST-BY/MUTE
+V
CC
SIGN
VREG
+V
CC
POW
-V
CC
POW
-V
CC
POW
PWM OUTPUT
BOOTSTRAP DIODE ANODE
BOOTSTRAP
NOT CONNECTED
FEEDBACK INTEGRATING CAPACITOR
SETTING FREQUENCY RESISTOR
SIGNAL GROUND
SIGNAL NEGATIVE SUPPLY
INPUT
CONTROL STATE PIN
POSITIVE SIGNAL SUPPLY
INTERNAL VOLTAGE REGULATOR
POSITIVE POWER SUPPLY
NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5)
NEGATIVE POWER SUPPLY (to be connected to pin 13 via C5)
Function
Table 3. Absolute Maximum Ratings
Symbol
V
CC
P
tot
T
stg
, T
j
V
FREQ
T
op
ESD
DC Supply Voltage
Power Dissipation T
case
= 70°C
Storage and Junction Temperature –40 to 150
Maximum Voltage Across RF (pin6)
Operating Temperature Range
Max ESD on Pins
Parameter
Figure 3.
b
O
so
et
l
P
e
ro
uc
d
s)
t(
so
b
-O
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
P
te
le
8
Value
±28
35
°C
od
r
s)
t(
uc
Unit
V
W
V
°C
KV
0 to 70
±1.2
-V
CC POW
-V
CC POW
+V
CC POW
VREG
+V
CC SIGN
ST-BY/MUTE
IN
-V
CC SIGN
SGN-GND
FREQ
FEEDCAP
N.C.
BOOT
BOOTDIODE
OUT
D96AU539A
TAB CONNECTED TO PIN 8
Table 4. Thermal Data
Symbol
T
th j-case
Parameter
Thermal Resistance Junction-case
Value
1.8 to 2.5
Unit
°C/W
2/7
TDA7482
Table 5. Electrical Characteristcs (Refer to the test circuit, V
CC
= ±21V; R
L
= 8Ω; R
S
= 50Ω;
R
F
= 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; T
amb
= 25°‘C unless otherwise specified.)
Symbol
V
S
I
q
V
OS
P
O
P
O
Parameter
Supply Range
Total Quiescent Current
Output Offset Voltage
Output Power
Output Power
R
L
=
∞,
No LC Filter
Play Condition
THD = 10%
THD = 1%
R
L
= 4Ω ; V
CC
= ±16V;
THD = 10%
THD = 1% (*)
V
CC
=±21V; R
L
= 8Ω;
P
O
= 25W THD 10%
V
CC
= ±21V; R
L
= 8Ω;
P
O
= 18W THD 10%
V
CC
= ±25V; R
L
= 8Ω;
P
O
= 43W THD 20%
R
L
= 8Ω; P
O
= 1W
R
L
= 0
3.5
–70
20
14
Test Condition
Min.
±10
40
-30
25
18
25
18
3.8
87
Typ.
Max.
±25
60
10
Unit
V
mA
mV
W
W
W
W
W
%
P
D
η
Maximum Dissipated Power
P
o
P
o
Efficiency
≡
---------------------
≡
------
(∗∗)
P
O
+
P
D
P
I
Top Efficiency maximum
Total Harmonic Distortion
Overcurrent Protection Threshold
Thermal Shut-down Junction
Temperature
Closed Loop Gain
Total Input Noise
Maximum Total V
CC
Protection
Input Resistance
Supply Voltage Rejection
Rising and Falling Time
Power Transistor on Resistance
Switching Frequency Operative
Range
Switching Frequency
Zero Signal Frequency
Constant (***)
η
max
THD
I
max
T
j
G
V
e
N
V
CCTOT MAX
R
i
SVR
T
r
, T
f
R
DSON
F
SW-OP
F
SW
B
F
R
F
88.5
0.1
A Curve
f = 20Hz to 22KHz
f = 100Hz; V
r
= 0.5
MUTE & STAND-BY FUNCTIONS
bs
O
*:
**:
***:
****:
(1)
V
ST-BY
V
MUTE
V
PLAY
et
l
o
Frequency Controller Resistor
Range (****)
Stand-by range
Mute Range
Play Range (1)
Mute Attenuation
Quiescent Current @ Stand-by
P
e
ro
uc
d
s)
t(
b
-O
so
P
te
le
29
50
20
46
100
100
od
r
5
150
30
7
12
30
60
50
0.4
ct
u
31
s)
(
%
%
A
°C
dB
µV
µV
V
kΩ
dB
ns
Ω
200
120
1.4x10
9
140
KHz
KHz
HzΩ
7
12
14
KΩ
0.8
1.8
4
60
80
3
5
2.5
V
V
V
dB
mA
A
MUTE
I
qST-BY
The output LC filtermust be changed to: L = 30µH; C = 1µF
P
O
= measured across the load using the following inductor: COIL 58120 MPPA2 (magnetics) TURNS: 28
φ
1mm
The zero-signal switching frequency can be obtained using the following expression: F
SW
= B
F
/R
F
The maximum value of R
F
is related to the maximum possible value for the voltage drop on R
F
itself
For V10 >5.2V, an input impedance of 10KΩ is to be considered
3/7
TDA7482
Figure 4. Recommended P.C. Board and Component Layout of the Circuit of Figure 2
Note: Capacitor C5 must be as close as possible to device’s pins 13 and 14
O
so
b
te
le
ro
P
uc
d
s)
t(
so
b
-O
P
te
le
od
r
s)
t(
uc
4/7
TDA7482
Figure 5. Multiwatt15 Mechanical Data & Package Dimensions
DIM.
A5
B
C
D
E
F
G
G1
H1
H2
L
L1
L2
L3
L4
L7
M
M1
S
S1
Dia1
21.9
21.7
17.65
17.25
10.3
2.65
4.25
4.73
1.9
1.9
3.65
4.55
5.08
17.5
10.7
22.2
22.1
0.49
0.66
1.02
17.53
19.6
20.2
22.5
22.5
18.1
17.75
10.9
2.9
4.85
5.43
2.6
2.6
3.85
0.862
0.854
0.695
0.679
0.406
0.104
0.167
0.186
0.075
0.075
0.144
0.179
0.200
0.689
0.421
0.874
0.87
1.27
17.78
1
0.55
0.75
1.52
18.03
0.019
0.026
0.040
0.690
0.772
0.795
0.886
0.886
0.713
0.699
0.429
0.114
0.191
0.214
0.102
0.102
0.152
0.050
0.700
2.65
1.6
0.039
0.022
0.030
0.060
0.710
mm
MIN.
TYP.
MAX.
MIN.
inch
TYP.
MAX.
0.197
0.104
0.063
OUTLINE AND
MECHANICAL DATA
Multiwatt15 (Vertical)
O
so
b
te
le
ro
P
uc
d
s)
t(
so
b
-O
P
te
le
od
r
s)
t(
uc
0016036 J
5/7
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