• on Audio/Video/Photography
  • Published in issue 7/2003 on page 0
About the article

Quad Car Amp

Quad Car Amp
This quad final amplifier is actually intended to be used in a car, but it can naturally also be used for a variety of other medium-power applications. The TDA7375A can be successfully used in all situations in which a reasonable amount of audio power is desired and only a relatively low supply voltage is available. This IC is the successor to the TDA7374B, which forms the heart of the active loudspeaker system described earlier this year. Such a quad IC amplifier is naturally an excellent choice for this application, especially since the individual amplifiers can be connected in pairs in the bridge configuration, which allows them to provide approximately four times as much power. An example of such a bridge configuration is shown elsewhere in this issue.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors:
R1-R4 = 100?
R5 = 10k?
R6 = 0?1, 5W
P1-P4 = 10 k preset
Capacitors:
C1,C3,C5,C7 = 15nF
C2,C4,C6,C8 = 220nF
C9 = 10µF 63V radial
C10 = 47µF 25V radial
C11-C14 = 3300µF 16V radial, max. diameter 13mm, e.g., Panasonic (Iripple 2500 mA) or Rubycon (Iripple 3400 mA)
C15 = 100nF
C16 = 1000µF 25V radial, max. diameter 13mm
Semiconductors:
IC1 = TDA7375A (ST)
Miscellaneous:
F1 = fuse, 4A/T (time lag), with PCB mount holder
2 fast-on (spade) terminal, male, vertical, solder type (2-pin version)
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