Service manual

25
32JW-73E
TDA7480 (IC1301,IC1302)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CC
DC Supply Voltage
±
20 V
T
stg
, T
j
Storage and Junction Temperature –40 to 150 °C
V
FREQ
Maximum Voltage Across VFREQ (Pin 9) 8 V
T
op
Operating Temperature Range -20 to 70 °C
ESD Maximum ESD on Pins
±
1.8 kV
THERMAL DATA
Symbol Parameter Value Unit
R
th j-amb
Thermal Resistance Junction to ambient 80 °C/W
R
th j-pin
Thermal Resistance Junction to Pin Max. 12 °C/W
PIN FUNCTIONS
N. Name Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
-V
CC
-V
CC
-V
CC
OUT
BOOTDIODE
BOOT
NC
FEEDCAP
FREQUENCY
SGN-GND
IN
ST-BY-MUTE
NC
+V
CC
SIGN
VREG
+V
CC
POW
-V
CC
-V
CC
-V
CC
-V
CC
NEGATIVE SUPPLY.
NEGATIVE SUPPLY.
NEGATIVE SUPPLY.
PWM OUTPUT
BOOTSTRAP DIODE ANODE
BOOTSTRAP CAPACITOR
NOT CONNECTED
FEEDBACK INTEGRATING CAPACITANCE
SETTING FREQUENCY RESISTOR
SIGNAL GROUND
INPUT
ST-BY/ MUTE CONTROL PIN
NOT CONNECTED
POSITIVE SIGNAL SUPPLY
10V INTERNAL REGULATOR
POSITIVE POWER SUPPLY
NEGATIVE SUPPLY (TO BE CONNECTED TO PIN 16 VIA C5)
NEGATIVE SUPPLY
NEGATIVE SUPPLY
NEGATIVE SUPPLY
-V
CC
OUT
BOOTDIODE
N.C.
BOOT
FEEDCAP
FREQ
1
3
2
4
5
6
7
8
9 STBY/MUTE
N.C.
+V
CC SIGN
+V
CC POW
VREG
-V
CC
-V
CC
20
19
18
17
16
14
15
13
12
D96AU537B
SGN-GND 10 IN11
-V
CC
-V
CC
-V
CC
-V
CC
PIN CONNECTION (Top view)
0 4 8 12 Area(cm
2
)
30
40
50
60
R
thj-a
(˚C/W)
D97AU675
COPPER AREA 35µ
THICKNESS
PC BOARD
Rth with "on board" Square Heatsink vs. cop-
per area.
TDA7480