®
TDA7490
25W + 25W STEREO CLASS-D AMPLIFIER 50W MONO IN BTL
PRODUCT PREVIEW
25W + 25W OUTPUT POWER: RL = 8Ω/4Ω; THD =...
®
TDA7490
25W + 25W STEREO CLASS-D AMPLIFIER 50W MONO IN BTL
PRODUCT PREVIEW
25W + 25W OUTPUT POWER: RL = 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
Flexiwatt 25 ORDERING NUMBER: TDA7490
DESCRIPTION The TDA7490 is a dual audio class D amplifier assembled in Flexiwatt 25 package; it is specially designed for high efficiency application mainly for TV and Home Stereo sets.
Figure 1. Test and application circuit. (Stereo Configuration)
R1 10K +VCC
R17 52.3K -VCC +VCC
MUTE
STBY
R2 30K C27 2.2µF 6
R21 4.7K
C26 470pF C25 470pF R20 68K 7 9
R3 10K
R4 130K
C23 2200µF 14 2
C22 100nF 4
C21 2200µF
-VCC R15 100
C1 330nF INPUT1 C2 1nF
10
G=2.5
PWM-stage1 INTEGRATOR1
5
C20 33nF C18 330pF
C19 560pF L1 30µ
OUT1 C10 220nF
PREAMPLIFIER1 12
3
C3 100nF C4 100nF R1 10K -VCC C7 100nF -VCC R 6.8 C5 330nF INPUT2 C6 1nF
11 R14 22K OSC 8 C17 24pF 15 C16 330pF R13 10K EXT_CK
13
16
1
25 PREAMPLIFIER2 18
G=2.5
INTEGRATOR2 PWM-stage2 20 24 22
23
R12 22K C14 33nF
L2 30µ C15 560pF R11 100 -VCC
OUT2 C29 220nF
21
19 R5 4.7K C8 470pF R6 68K
17
C9 470pF
C28 2200µF -VCC R9 52.3K
C11 100nF
C12 2200µF +VCC
D98AU978A
December 1999
This is preliminary information on a new product now in development. Details are subject to change without notice.
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TDA7490
Figure 2....