TDA7490 Datasheet, PDF (1/10 Pages) STMicroelectronics – 25W + 25W STEREO CLASS-D AMPLIFIER 50W MONO IN BTL

TDA7490
25W + 25W STEREO CLASS-D AMPLIFIER
50W MONO IN BTL
1 FEATURES
■ 25W + 25W OUTPUT POWER:
@R_L = 8Ω/4Ω; THD = 10%
■ HIGH EFFICIENCY
■ WIDE SUPPLY VOLTAGE RANGE (FROM ±10
TO ±25V)
■ SPLIT SUPPLY
■ TURN OFF/ON POP FREE
■ ST-BY AND MUTE FEATURES
■ SHORT CIRCUIT PROTECTION ACROSS
THE LOAD
■ THERMAL OVERLOAD PROTECTION
■ EXTERNALLY SINCHRONIZABLE
■ BRIDGE CONFIGURATION
Figure 1. Package
Flexiwatt 25
Table 1. Order Codes
Part Number
TDA7490
Package
Flexiwatt 25
2 DESCRIPTION
The TDA7490 is a dual audio class D amplifier as-
sembled in Flexiwatt 25 package; it is specially de-
signed for high efficiency application mainly for TV
and Home Stereo sets.
Figure 2. Test and Application Circuit. (Stereo Configuration)
R1 10K
MUTE
STBY
R3
10K
R2
30K
C27
2.2µF
INPUT1
C1 330nF
C2
1nF
C3
100nF
C4
100nF
R1 10K
-V_CC
-V_CC
INPUT2
C7 100nF
R 6.8
C5 330nF
C6
1nF
R17 52.3K
C26 470pF C25 470pF
R21 4.7K
+V_CC
-V_CC
+V_CC
R20
R4
C23
C22
C21
68K
130K
2200µF 100nF 2200µF
6
7
9
14
2
4
10
G=2.5
PREAMPLIFIER1
INTEGRATOR1
12
13
16
1
25
PREAMPLIFIER2
G=2.5
18
INTEGRATOR2
19
17
PWM-stage1
OSC
PWM-stage2
20
24
5
3
11
8
15
23
21
22
C20
33nF
C18 330pF
R14 22K
C17
24pF
C16 330pF
R12 22K
C14
33nF
R5 4.7K
C8 470pF
R6 C9 470pF
68K
C28
2200µF
C11
100nF
C12
2200µF
-V_CC
+V_CC
R9 52.3K
-V_CC
R15
100
C19
560pF
L1 30µ
R13
10K
L2 30µ
C15
560pF
R11
100
-V_CC
D98AU978A
OUT1
C10
220nF
EXT_CK
OUT2
C29
220nF
December 2005
Rev. 6
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