TDA7498LTR STMicroelectronics, TDA7498LTR Datasheet - Page 18

• Manufacturer Part Number: TDA7498LTR
• Description: Audio Amplifiers 80W and 80W Dual BTL Class-D Audio Amp
• Manufacturer: STMicroelectronics

Specifications of TDA7498LTR

• Product Category: Audio Amplifiers
• Rohs: yes
• Product: Class-D
• Output Type: Dual
• Output Power: 80 W
• Thd Plus Noise: 10 %
• Operating Supply Voltage: 44 V
• Supply Current: 40 mA
• Maximum Power Dissipation: 16 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PowerSSO-36
• Available Set Gain: 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C

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