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TDA7490

ST Microelectronics
Part Number TDA7490
Manufacturer ST Microelectronics
Description 25W + 25W STEREO CLASS-D AMPLIFIER
Published Apr 16, 2005
Detailed Description ® TDA7490 25W + 25W STEREO CLASS-D AMPLIFIER 50W MONO IN BTL PRODUCT PREVIEW 25W + 25W OUTPUT POWER: RL = 8Ω/4Ω; THD =...
Datasheet PDF File TDA7490 PDF File

TDA7490
TDA7490

Overview
® 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.
1/9 TDA7490 Figure 2.
Test and application circuit.
(Bridge Configuration) 470pF 470pF R5 52.
3K C40 R4 68K C41 The LC filter is optimized for 8Ω (<->LC filter for 4Ω in single-ended) It hos to be changed for other loads 9 7 PRE + L9 30µ Int.
PWM-stage 3 C23 235nF C26 470nF R27 10 R28 10 C29 470nF dumping (common mode) INPUT 10 R63 4.
7K R25 Rload C24 235nF 18 PRE + - Int.
PWM-stage 23 L10 30µ 19 470pF 17 470pF C60 R61 68K C59 R62 52.
3K D99AU1081 ABSOLUTE MAXIMUM RATINGS Symbol VCC Ptot Tstg, Tj Top...


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