SGS Thomson Microelectronics TDA7481 Datasheet
18W MONO CLASS-D AMPLIFIER
18W OUT P UT POWER:
R
= 8Ω/4Ω; THD = 10%
L
HIGH EFFICIENCY
WIDE SUPPLY VOLTAGE RANGE (UP TO
25V)
±
SPLIT SU PPLY
OVER VO LT AGE PROT E C T ION
ST-BY AND MUTE F EA T U RES
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
TDA7481
Multiwatt15
DESCRIPTION
The TDA7481 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 Application Circuit.
+5V
R1
10K
R2
R3
10K
30K
MUTEST-BY 10
IN1
C2 0.33µF
C4 4.7nF
D96AU534C
C1
2.2
µF
ST-BY/
MUTE
C3
1nF
FEEDCAP
SGN-GND
270pF
9
IN1
5
7
6 8 14,15
C8
C5 100nF
-VCC
(Pin 14,15)
V
N.C.
FREQ -V
R4 12KΩ
(R
CC POW
-
PRE
+
13 11
4
)
F
+VCC
-V
V
CC SIGN
100nF
CC SIGN
-
PWM
+
C9
100nF
ORDERING NUMBER:
C6
3
1
12
2
CC POW
-VCC
C7
2200µF
BOOT
OUT
VREG
BOOTDIODE
C10
2200µF
C11
100nF
C12
560pF
R5
150Ω
TDA7481
L1 60µH
C14
470nF
C15
100nF
8Ω
February 1998
1/6
TDA7481
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
DC Supply Voltage
Power Dissipation T
Storage and Junction Temperature –40 to 150 °C
j
Maximum Voltage Across RF (pin 6) 8 V
Operating Temperature Range 0 to 70 °C
T
V
V
CC
P
tot
stg
FREQ
T
op
, T
ESD Max ESD On Pins
PIN CONNECTION (Top view)
= 70°C 35 W
case
25 V
±
1.2 KV
±
D96AU535A
-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
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TAB CONNECTED TO PIN 8
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
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)
2/6
Loading...