Datasheet

Applications information TDA7498L
18/27 Doc ID 16504 Rev 3
5 Applications information
5.1 Applications circuit
Figure 20. Applications circuit
5.2 Mode selection
The three operating modes of the TDA7498L are set by the two inputs, STBY (pin 20) and
MUTE (pin 21).
● Standby mode: all circuits are turned off, very low current consumption.
● Mute mode: inputs are connected to ground and the positive and negative PWM
outputs are at 50% duty cycle.
● Play mode: the amplifiers are active.
L+
R+
R-
VCC
GND
L+
L-
R+
R-
TDA7498L
MUTE
STBY
3V3 POWER SUPPLY
Single-Ended
*
*
*
*
*
Input
CLASS-D AMPLIFIER
*
*
*
*
Single-Ended
Input
Load=6 ohm
For
For
FREQUENCY SHIFT
OUTPUT
INPUT
L-
*
LC FILTER COMPONENT
Load
L1,L2,L3,L4
C20,C26 C18,C22,C24,C28
6 ohm
8 ohm
22 uH
22 uH 470 nF
680 nF
220 nF
220 nF
C5
100nF
R3
39K
L4
22uH
C1
1uF
C2
1uF
C11
1uF
C12
1uF
C8
100nF
C25
100nF
C19
100nF
C27
330pF
R6
22R
C40
220nF
C41
220nF
C21
330pF
R5
22R
C42
220nF
C43
220nF
C3
1nF
C4
1nF
C13
1nF
C14
1nF
32
INPB
36
VSS
9
OUTNB
5
PGNDB
7
PVCCB
3
OUTPB
10
OUTNA
12
PVCCA
14
PGNDA
16
OUTPA
33
INNB
8
OUTNB
4
PGNDB
21
MUTE
6
PVCCB
2
OUTPB
29
SVR
11
OUTNA
1
SUB_GND
22
INPA
23
INNA
27
SGND
26
VDDS
28
DIAG
19
VDDPW
18
PGND
20
STBY
24
ROSC
31
GAIN1
35
SVCC
30
GAIN0
25
SYNCLK
17
OUTPA
15
PGNDA
34
VREF
13
PVCCA
IC1
TDA7498L
R1
100k
R7
22R
C6
100nF
R4
120k
R2
33k
R8
6.8k
C26
680nF
C10
100nF
C20
680nF
J6
J5
2
1
3
S1
2
1
3
S2
C9
100nF
C29
2.2uF
2
GND
1
OUT
3
IN
IC2
L4931CZ33
+
C15
2.2uF
16V
1
2
J2
J8
J7
+
C7
2.2uF
16V
+
C23
2200uF
50V
L3
22uH
L1
22uH
L2
22uH
C17
10uF
10V
C16
10uF
10V
D1
18V
1
2
3
Q1
R9
120K
J4
C30
1uF
C31
1uF
R14
47k
R15
8R
C28
220nF
R16
8R
C24
220nF
R17
8R
C18
220nF
R18
8R
C22
220nF
SYNC
1
2
3
4
J3
2
4
1
3
J1
R13
68k
DIAG
SGNDSGNDSGND
SGND
SGND
SGNDSGND
SGND
SGND
SGNDSGND
SGNDSGND
SGNDSGNDSGND
SGNDSGND
SGNDSGND
VDDS
VDDS
VCC
SGND SGND
SGND
SGND
SGND
SGND
3V3
3V3
SGND
SGND
SGND
SGND
SGND
SGND
SGND
FS
FS
FS