SGS Thomson Microelectronics TDA7482 Datasheet
25W MONO CLASS-D AMPLIFIER
25W OUTPUT POWER:
R
=8Ω/4Ω; THD = 10%
L
HIGHEFFICIENCY
WIDE SUPPLY VOLTAGE RANGE (UP TO
25V)
±
SPLIT SUPPLY
OVERVOLTAGEPROTECTION
ST-BYAND MUTE FEATURES
SHORTCIRCUITPROTECTION
THERMALOVERLOAD PROTECTION
TDA7482
Multiwatt15
DESCRIPTION
The TDA7482 is an audio class-D amplifier assembled in Multiwatt15 package specially designed for high efficiency applications mainly for
TV and Home Stereo sets.
Figure 1:
Test and Applicationcircuit.
+5V
R1
10K
R3
R2
30K
10K
MUTEST-BY 10
IN1
C2 0.33µF
C4 4.7nF
D96AU538C
C1
2.2
µF
ST-BY/
MUTE
IN1
C3
1nF
FEEDCAP
SGN-GND
C8
270pF
9
5
7
C5 100nF
-VCC
(Pin 14,15)
V
N.C.
6 8 14,15
FREQ -V
R4 12KΩ
(RF) -VCC
CC POW
-
PRE
+
13 11
4
-V
+VCC
CC SIGN
V
CC SIGN
100nF
C6
100nF
-
PWM
+
C9
ORDERING NUMBER: TDA7482
C7
2200µF
BOOT
3
C11
100nF
C12
560pF
R5
150Ω
L1 60µH
C14
470nF
C15
100nF
CC POW
1
12
2
OUT
VREG
BOOTDIODE
C10
2200µF
8Ω
June 1998
1/6
TDA7482
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
P
tot
T
stg,Tj
V
FREQ
T
op
ESD Max ESD on Pins ±1.2 KV
DC Supply Voltage ±28 V
Power Dissipation T
=70°C35W
case
Storage and Junction Temperature –40 to 150 °C
Maximum Voltage Across RF (pin6) 8 V
Operating Temperature Range 0 to 70 °C
PIN CONNECTION
(Topview)
TAB CONNECTED TO PIN 8
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
D96AU539A
-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
THERMAL DATA
Symbol Parameter Typ. Max. Unit
R
th j-case
Thermal Resistance Junction-case 1.8 2.5 °C/W
PIN FUNCTIONS
N. Name Function
2/6
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
OUT
BOOTDIODE
BOOT
NC
FEEDCAP
FREQ
SGN-GND
–V
SIGN
CC
IN
ST-BY/MUTE
+V
SIGN
CC
VREG
+V
POW
CC
-V
POW
CC
-V
POW
CC
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 CS)
NEGATIVE POWER SUPPLY (to be connected to pin 13 via CS)
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