Sharp 28JS-74SS Service Manual page 49

TDA7480L (IC501)
10W OUTPUT POWER:
R = 8Ω/4Ω; THD = 10%
L
HIGH EFFICIENCY
NO HEATSINK
SPLIT SUPPLY
OVERVOLTAGE PROTECTION
ST-BY AND MUTE FEATURES
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7480L is an audio class-D amplifier as-
sembled in Power DIP package specially de-
signed for high efficiency applications mainly for
TV and Home Stereo sets.
Figure 1: Test and Application Circuit.
ST-BY MUTE
IN1
C2 0.33µF
C4 4.7nF
D96AU536E
+5V
R1
C5 100nF
10K
-VCC
(Pin 17)
R2
R3
7K
30K
V
N.C.
CC POW
12
7,13
C1 ST-BY/
2.2 MUTE
µF
IN1 11
-
PRE
+
C3
1nF
8
FEEDCAP
SGN-GND
10
9
FREQ
C8 R4 12KΩ
270pF
RF
ORDERING NUMBER: TDA7480L
+VCC
C6
100nF
V
CC SIGN
16 14
6
- 4
PWM
+
5
15
1,2,3,18,19,20 17
-V -V
CC CC
-VCC
C9
100nF
-VCC
49
PDIP20 (14+3+3)
C7
2200µF
BOOT
C11
100nF
L1 60µH
OUT C12
560pF
C14
R5
470nF
150Ω
BOOTDIODE
VREG
C15
100nF
C10
2200µF
28JS-74S
8Ω